Best Lead Generation Companies

How Many Lead Generation Companies Products Does G2 Track?

Total Products under this Category: 798

Category Stats (Sep 2026)

  • Average Rating: 4.66/5 (↓0.01 vs Aug 2026) The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: Syrvi AI (+5.95%) - Among all products in this category, Syrvi AI recorded the largest rating increase compared to last month

Last updated: September 01, 2026

How Does G2 Rank Lead Generation Companies Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 5,300+ Authentic Reviews
  • 798+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Lead Generation Companies

G2 Grid® for Lead Generation Companies plotting products by satisfaction and market presence

Highlighted products: memoryBlue, KlientBoost, INFUSE, demandDrive, Martal Group, durhamlane, SmartBug Media, and Clarify.

Underlying data: [Grid® JSON](https://www.g2.com/categories/lead-generation-services/grids.json?focus%5B%5D=memoryblue&focus%5B%5D=klientboost&focus%5B%5D=infusemedia-infuse&focus%5B%5D=demanddrive&focus%5B%5D=martal-group&focus%5B%5D=durhamlane&focus%5B%5D=smartbug&focus%5B%5D=clarify-clarify)

memoryBlue

memoryBlue helps B2B tech companies build and scale their go-to-market engines. For more than 20 years, we’ve helped hundreds of clients—from fast-growth startups to global enterprises—generate pipeline, expand markets, and build world-class sales teams. Our model combines the best of people and AI. With 650+ sales professionals across North America, EMEA, and APAC, we deliver global reach in 30+ languages. Every client engagement is supported by our SMART services: Sales, Marketing, Academy training, Recruiting and Technology—to create an end-to-end growth platform. In 2024, memoryBlue and Operatix joined forces to become one of the largest and most experienced outsourced sales growth partners in the world. Together, we bring deep expertise to support all go-to-market functions, plus a network of 1,200+ alumni and active candidates ready to scale with you. Whether you need to launch a new product, break into new segments or regions, fill pipeline fast or create expansion opportunities, memoryBlue has the talent, data and experience to help you hit your goals - predictably and globally.

Average Rating: 4.6/5.0

Total Reviews: 336

Who Is the Company Behind memoryBlue?

  • Seller: memoryBlue
  • Company Website:
  • Year Founded: 2002
  • HQ Location: Tysons, Virginia
  • Twitter: @memoryBlueSales
    9,004 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    921 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Information Technology and Services, Computer Software
  • Company Size: 51% Medium, 21% Small

What Do G2 Reviewers Say About memoryBlue?

AI-generated summary from verified user reviews

Pros
  • Users value the excellent communication from memoryBlue, appreciating their responsiveness and adaptability throughout the campaign.
  • Users value the professionalism of memoryBlue's team, highlighting seamless integration and effective communication throughout the process.
  • Users commend the teamwork at memoryBlue, appreciating their dedication, communication, and alignment with client goals.
  • Users highlight the effective lead generation by memoryBlue, appreciating excellent rapport-building and impactful outreach services.
  • Users value the process efficiency of memoryBlue, which streamlines operations and enhances responsiveness to client needs.
Cons
  • Users find the pricing to be expensive, particularly challenging for smaller organizations with limited budgets.
  • Users express concern over poor lead quality from memoryBlue, limiting effectiveness without immediate hiring needs.
  • Users face communication issues with MemoryBlue, struggling to align business needs and BDR capabilities effectively.
  • Users highlight the high SDR turnover in memoryBlue, leading to frequent staff changes and challenges in maintaining a strong team.
  • Users note that high turnover on the team disrupts workflow and impacts overall success.

What Are Recent G2 Reviews of memoryBlue?

What Are G2 Users Discussing About memoryBlue?

KlientBoost

KlientBoost is a performance marketing agency that moves fast & breaks things like sales records, plateaus, and your competitors’ hearts. The only thing we don’t break? Our promises and the bank. We have more success stories than other agencies have clients. We help scrappy startups to massive brands, from straightforward products to ultra-complex services. Check out some of the 600+ clients wins we’ve published. Whether you’re in lead gen, SaaS, or eCommerce, we can help you grow your Google Ads, Facebook Ads, SEO, and Email Marketing while also increasing your conversion rates. Get your free marketing plan today and we’ll give you the custom game plan to hit your goals.

Average Rating: 4.8/5.0

Total Reviews: 405

Who Is the Company Behind KlientBoost?

  • Seller: KlientBoost
  • Year Founded: 2015
  • HQ Location: Costa Mesa, California
  • Twitter: @KlientBoost
    4,840 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    97 employees on LinkedIn®

Who Uses This Product?

  • Who Uses This: Co-Founder, Director of Marketing
  • Top Industries: Computer Software, Marketing and Advertising
  • Company Size: 57% Small, 38% Medium

What Do G2 Reviewers Say About KlientBoost?

AI-generated summary from verified user reviews

Pros
  • Users value the collaborative approach of KlientBoost, fostering continuous improvement and strong partnership in achieving goals.
  • Users commend KlientBoost for their excellent communication, highlighting responsiveness and proactive partnership that drives results.
  • Users value the collaborative partnership with KlientBoost, driving continuous improvements and achieving advertising goals effectively.
  • Users commend KlientBoost for their effective team collaboration, consistently pushing for improvement and shared advertising success.
  • Users value the expertise of KlientBoost, praising their deep marketing knowledge and responsiveness throughout the process.
Cons
  • Users find the cost of KlientBoost to be high, especially with additional expenses for creative production and ad spend.
  • Users experience limited access to expertise, making it challenging to receive tailored support for their specific needs.
  • Users experience communication issues, often waiting for responses during critical moments, hindering quick pivots.
  • Users find the complexity of strategy development with KlientBoost frustrating, leading to wasted investments and negative impacts on KPIs.
  • Users find the ineffective strategy from KlientBoost wasted investment and negatively impacted key performance metrics.

What Are Recent G2 Reviews of KlientBoost?

What Are G2 Users Discussing About KlientBoost?

INFUSE

Demand Excellence Delivered in Every Relationship We are INFUSE, a global independent partner focused on B2B demand and revenue marketing performance. At the heart of our company is an integrated demand engine powered by first-party and buying group data. Built on AI and enhanced with multiple intent signal streams, this engine drives qualified interest in your business and products to predict the next best action for in-market accounts and buyers. Omnichannel outreach strategies tailor programs that identify and engage prospective buyers throughout their research journey. With a verified global audience of business and technology profiles of over 252M, we ensure precision targeting across geos, industries, and buyer and account profiles. To optimize your investment and deliver on your lead-to-revenue performance, INFUSE demand tools and professionals are available in over 75 countries, across all time zones.

Average Rating: 4.5/5.0

Total Reviews: 293

Who Is the Company Behind INFUSE?

  • Seller: INFUSE
  • Company Website:
  • Year Founded: 2012
  • HQ Location: Boca Raton, US
  • LinkedIn® Page: www.linkedin.com
    835 employees on LinkedIn®

Who Uses This Product?

  • Who Uses This: Marketing Manager, Digital Marketing Manager
  • Top Industries: Computer Software, Information Technology and Services
  • Company Size: 58% Medium, 22% Small

What Do G2 Reviewers Say About INFUSE?

AI-generated summary from verified user reviews

Pros
  • Users highlight the excellent communication from INFUSE, appreciating their quick responses and proactive support throughout campaigns.
  • Users appreciate the excellent support and communication from INFUSE, enhancing their marketing effectiveness and campaign success.
  • Users value INFUSE's full funnel capabilities, appreciating their innovative approach and exceptional customer support throughout campaign management.
  • Users value the exceptional customer support from INFUSE, facilitating smooth campaign management and fostering strong partnerships.
  • Users appreciate the effective lead generation of INFUSE, noting its depth and quality for engaging prospects successfully.
Cons
  • Users experience communication issues with INFUSE, finding repurposed content lacks clarity and requires excessive revisions.
  • Users experienced miscommunication with INFUSE regarding profiles and invoice timing, leading to some confusion and delays.
  • Users find that the lead quality is poor, making it difficult to transition leads to the sales team effectively.
  • Users experience occasional delivery delays, but the issues are typically resolved quickly and do not hinder overall performance.
  • Users find INFUSE expensive, and suggest adding more pricing options for better flexibility in plans.

What Are Recent G2 Reviews of INFUSE?

What Are G2 Users Discussing About INFUSE?

demandDrive

♾️ Full GTM agency (Sales + Marketing + RevOps in a single partner) ♀️ Female-owned business 🌈 Clay Studio Partner 🪩 HubSpot Platinum Solutions Partner 🏆 9x Inc. 5000 honoree 🥇 2x BBJ Fast 50 honoree demandDrive is a Boston-based go-to-market (GTM) agency with 15+ years of experience and 1,000+ client engagements. We partner with B2B revenue leaders in industries like tech, HealthTech, cybersecurity, manufacturing, and software to generate pipeline that converts into closed revenue. Why us? The most effective revenue engines are built by aligning people, processes, and technology around the same end goal, which is difficult to achieve when multiple agencies each handle a different piece of the puzzle. demandDrive brings full GTM expertise under a single roof, from outsourced sales services to growth marketing, RevOps, and GTM engineering. Instead of simply providing headcount, our team evaluates your entire GTM setup to identify gaps and opportunities across the funnel before building a tailored program. You get one partner for building and moving pipeline across your entire funnel, with retainers that can flex to where they're needed most during seasonal lulls or busy periods. demandDrive is a Clay Studio Partner, HubSpot Platinum Solutions Partner, and Google Partner. We've been named to the Inc. 5000 list for nine consecutive years and are a two-time BBJ Fast 50 honoree. Our work has produced measurable outcomes for clients, including Qorvo ($136M in converted opportunities), Casenet ($19.8M in closed-won revenue), Jenzabar (1,300% ROI), Smartlinx (467% ROAS), and Gravyty (714% increase in lead volume).

Average Rating: 4.6/5.0

Total Reviews: 69

Who Is the Company Behind demandDrive?

  • Seller: demandDrive
  • Company Website:
  • Year Founded: 2011
  • HQ Location: Waltham, US
  • Twitter: @demandDrive
    990 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    242 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Manufacturing, Hospital & Health Care
  • Company Size: 41% Medium, 39% Small

What Do G2 Reviewers Say About demandDrive?

AI-generated summary from verified user reviews

Pros
  • Users commend the dedication and expertise of the demandDrive team, fostering successful collaborations and project outcomes.
  • Users value the expertise of demandDrive's team, praising their strategic, creative, and supportive approach to projects.
  • Users appreciate the responsive guidance from demandDrive, valuing their tailored support and collaborative approach to sales.
  • Users praise the collaborative approach of demandDrive, appreciating their expertise and accountability in project management.
  • Users appreciate the effective communication of demandDrive, fostering collaboration and making the partnership enjoyable and productive.
Cons
  • Users often face significant miscommunication issues with demandDrive, impacting deliverables and overall project expectations.
  • Users express concerns over insufficient guidance during onboarding, leading to unclear expectations and unmet project promises.
  • Users experience communication issues with demandDrive, leading to misunderstandings and unmet expectations during projects.
  • Users experience an ineffective strategy at times, leading to misunderstandings and unmet quality expectations during projects.
  • Users experience lack of communication with demandDrive, leading to unmet expectations and disconnect during projects.

What Are Recent G2 Reviews of demandDrive?

Martal Group

Martal Group https://martal.ca/ is a top lead generation and sales enablement agency servicing B2B companies. We enhance your in-house sales team with on-shore sales executives catering lead generation and sales services across 50+ verticals. We integrate with leading data providers and intelligence prospecting tools to provide our customers with accurate B2B contact information. Our researchers use a proprietary workflow to create opportunities and provide targeted lists based on your ideal buyer profile and potential addressable market. Our highly experienced managed sales team builds a strategy that drives prospect engagement with multiple personalized sales touches. We route active prospects to your sales team or onboard new clients for you. We cater both outbound and inbound lead generation, as well as Account-Based Marketing (shortlisting target accounts and reaching the right stakeholder at the right company).

Average Rating: 4.6/5.0

Total Reviews: 135

Who Is the Company Behind Martal Group?

Who Uses This Product?

  • Who Uses This: CEO
  • Top Industries: Information Technology and Services, Computer Software
  • Company Size: 68% Small, 25% Medium

What Do G2 Reviewers Say About Martal Group?

AI-generated summary from verified user reviews

Pros
  • Users commend the professionalism of Martal Group, noting their talent and customized service approach.
  • Users commend the proactive and transparent communication of Martal Group, fostering a strong collaborative relationship.
  • Users commend Martal Group for their expertise in B2B sales and seamless integration as a team extension.
  • Users commend Martal Group for their high-quality lead generation and seamless integration as a team extension.
  • Users appreciate the exceptional team quality at Martal Group, highlighting their tailored, professional, and seamless integration.
Cons
  • Users express concern over limited control in customizing and exporting outreach contact statuses for targeting ads effectively.
  • Users note a lack of export features for contacts, suggesting it limits their retargeting capabilities.
  • Users are disappointed by the poor customer support, feeling a lack of customization and responsiveness during their experience.
  • Users feel that the sales leads could be better qualified, impacting the effectiveness of their sales strategies.
  • Users find the slow processes of Martal Group frustrating due to initial ramp-up delays and lack of customization.

What Are Recent G2 Reviews of Martal Group?

What Are G2 Users Discussing About Martal Group?

durhamlane

durhamlane is a specialist B2B sales company providing outsourced SDR teams and sales support to companies with complex, long-cycle purchase processes. We deliver outsourced SDR and b2b sales solutions to help mid-market and enterprise businesses generate, qualify and convert leads through high-value sales cycles. With over 15 years’ experience solely focused on sales development for clients across the UK, Europe and North America. We combine a proven methodology - 'Selling at a Higher Level' - with performance based delivery models and native-language SDR teams to scale growth. • Fully-managed services including outbound sales development, lead conversion, new customer acquisition, customer expansion and event-sales support. • A consultative 'Selling at a Higher Level' methodology developed in-house, paired with AI-powered sales technology and data-driven insights to support consistent pipeline generation and conversion. • Performance-based commercial models aligned with measurable outcomes (such as sales-accepted leads and revenue), instead of pure time-based billing. • Fast mobilisation (typically around a 30-day onboarding to market) and scalable native-language SDR teams covering the UK, Europe and North America, enabling global reach. • Transparent reporting integrated with clients’ CRM systems (for example, via Salesloft integration) and regular insights to improve campaign performance and decision-making. durhamlane’s offering is tailored for organisations seeking specialist external support in b2b sales - especially where in-house teams may be overstretched, inexperienced in long sales cycles, or lacking scale. Our emphasis on proven process, data transparency and tangible business outcomes makes us a strong option for companies focused on measurable pipeline growth rather than simply generating activity. Company overview & history • Founded in February 2011.  • Headquartered at Deltic House, Kingfisher Way, Silverlink Business Park, Newcastle (NE28 9NX), United Kingdom.  Awards & industry recognition • Winner, “Best Use of Onboarding & Training” at the Engage B2B Awards (2022) for our internal onboarding program.  • Winner, “Excellent in Partnership Collaboration” at the GSA UK Awards (2022) for our partnership with Konica Minolta Business Solutions.  • Winner, “Technology Innovation” at the North Tyneside Business Awards (2025), recognising innovation in sales services.  • Winner, “Early Careers Employer of the Year” at the British Recruitment Awards (2024), reflecting strong employee development and recruitment practice.  • Shortlisted, “Small Exporter of the Year” at the UMi Northern Powerhouse Export Awards (2023), recognising global expansion and exports.  • Shortlisted in two categories at the UK Company Culture Awards (2024), reflecting commitment to culture, remote working initiative and employee experience.

Average Rating: 4.7/5.0

Total Reviews: 27

Who Is the Company Behind durhamlane?

  • Seller: durhamlane
  • Company Website:
  • Year Founded: 2011
  • HQ Location: Newcastle upon Tyne, GB
  • LinkedIn® Page: www.linkedin.com
    111 employees on LinkedIn®
  • Phone: +44 191 481 3800

Who Uses This Product?

  • Top Industries: Financial Services, Information Technology and Services
  • Company Size: 22% Small, 22% Large

What Do G2 Reviewers Say About durhamlane?

AI-generated summary from verified user reviews

Pros
  • Users value durhamlane's expertise in lead generation, highlighting their well-trained team and advanced technology for effective outreach.
  • Users value the collaborative partnership with durhamlane, emphasizing their trust, accountability, and effective outcomes.
  • Users value durhamlane's effective lead generation approach, appreciating their adaptability and commitment to tailored solutions.
  • Users value the accountability and effective methodologies of durhamlane, leading to successful sales outcomes and strong partnerships.
  • Users value the expertise and thorough process of durhamlane, enhancing collaboration and delivering results seamlessly.
Cons
  • Users face a high turnover of BDRs, though transitions are handled professionally by the team.
  • Users note some staff turnover but commend the team for handling transitions with professionalism.

What Are Recent G2 Reviews of durhamlane?

SmartBug Media

🤝 Most Decorated Elite HubSpot Partner (3x HubSpot North America Partner of the Year) 🤝 Google Premier Partner 🤝 Shopify Partner 🏅 Continue to hold all available HubSpot Accreditations 📚 More than 1,200 marketing & sales certifications 🏆 More than 150 company awards & recognitions (and counting) 🌟 More than 700 5-star customer reviews across multiple platforms At SmartBug Media, we've been navigating the digital agency space for over 15 years, mastering the art of creating resilient growth across the entire customer lifecycle. From marketing to sales, revenue operations to customer success, and e-commerce to integration - we've got you covered! Now, imagine having access to a center of excellence for hire, ready to propel your organization toward success. That's us! We combine sound strategies, cutting-edge technology, and top-notch talent to set the course for your future success. And hey, it's not just about being full service; we're all about providing solutions that are specifically tailored to your needs. SmartBug's reputation? Well, it speaks volumes about our commitment to our clients. A 3x HubSpot North America Partner of the Year with over 700 5-star reviews and Elite partner status, we are the largest and most decorated HubSpot agency partner in the world. Plus, we're a Google Premier Partner and a proud Shopify partner. In a world that's constantly changing, we remain steadfast in our dedication to delivering client success and an unparalleled agency experience. It's not just about solving complex problems; it's about building relationships based on trust. So, let's journey together towards growth and resilience. After all, it's what we do best!

Average Rating: 4.8/5.0

Total Reviews: 209

Who Is the Company Behind SmartBug Media?

  • Seller: SmartBug Media
  • Year Founded: 2007
  • HQ Location: Newport Beach, US
  • Twitter: @SmartBugMedia
    2,002 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    174 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Computer Software, Financial Services
  • Company Size: 54% Small, 32% Medium

What Do G2 Reviewers Say About SmartBug Media?

AI-generated summary from verified user reviews

Pros
  • Users praise the helpful professionalism of SmartBug Media, highlighting exceptional individualized service and language support.
  • Users commend SmartBug Media's team for their deep expertise and helpfulness in marketing-related inquiries.
  • Users commend the exceptional customer support from SmartBug Media, appreciating personalized training and timely assistance.
  • Users praise the exceptional design team for their creativity, experience, and strong communication, enhancing collaboration.
  • Users appreciate the friendly and supportive team at SmartBug Media, always available to assist when needed.
Cons
  • Users find SmartBug Media to be expensive relative to the unsatisfactory initial service and difficulties in communication.
  • Users experience inefficient scheduling during onboarding, feeling a need for more flexibility to grasp the material better.
  • Users report time management challenges due to unprepared strategists, causing issues with scheduling and productivity.
  • Users express frustration over expensive pricing that leads to unforeseen charges and limited results for high costs.
  • Users experience occasional long waiting times due to project overlaps, though it's often expected with agency work.

What Are Recent G2 Reviews of SmartBug Media?

What Are G2 Users Discussing About SmartBug Media?

Clarify

Clarify is a B2B growth orchestration partner specifically designed for high growth and enterprise technology companies selling in high value & complex markets, typically within enterprise, strategic and global accounts. This solution integrates outsourced sales development, account-based marketing (ABM), and data-driven go-to-market strategies to help organizations build a high-quality sales pipeline in their most critical accounts. By leveraging a comprehensive approach, Clarify enables companies to effectively target and engage potential clients, ensuring that their resources are allocated where they can achieve the most significant impact. The target audience for Clarify includes technology organizations looking to optimize their sales processes and improve their market reach. These organizations often face challenges in identifying and engaging key accounts, which is where Clarify's expertise comes into play. With a presence in both London and Tampa, Clarify operates across the EMEA and Americas regions, providing services in over 12 languages. This geographical reach allows the company to cater to a diverse clientele, adapting its strategies to meet the unique needs of various markets. Key features of Clarify include research-led account targeting, multi-threaded outreach, and AI-enabled account intelligence. The research-led approach ensures that clients are targeting the right accounts based on data-driven insights, while multi-threaded outreach allows for engagement with multiple stakeholders within those accounts. This comprehensive strategy is complemented by AI-enabled account intelligence, which provides real-time insights and enhances decision-making processes. By combining these elements, Clarify helps clients create tailored marketing and sales initiatives that resonate with their target audience. The benefits of partnering with Clarify extend beyond just pipeline generation. By acting as an embedded extension of clients' commercial teams, Clarify fosters collaboration between revenue, marketing, and sales leadership. This alignment ensures that all efforts are focused on measurable outcomes, such as pipeline growth and revenue generation, rather than superficial metrics. With over two decades of experience, Clarify has established itself as a trusted partner for enterprise technology companies, delivering value through its innovative approach to growth orchestration.

Average Rating: 5.0/5.0

Total Reviews: 17

Who Is the Company Behind Clarify?

  • Seller: Clarify
  • Company Website:
  • Year Founded: 2003
  • HQ Location: Theale, England
  • Twitter: @ClarifyUK
    449 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    197 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 71% Large, 18% Medium

What Are Recent G2 Reviews of Clarify?

Callbox

Callbox is a premier global lead generation company, recognized as one of the best lead generation companies for its unmatched experience and capabilities. We are uniquely positioned to help businesses scale globally, leveraging over two decades of expertise, cutting-edge tools, and data-driven processes. Since 2004, we have been helping B2B companies achieve their growth and revenue goals through a comprehensive suite of lead generation, appointment setting, and data-related solutions. Why Callbox Stands Out Among the Best Our innovative multi-touch, multi-channel approach allows us to engage decision-makers at various touchpoints throughout the conversion cycle. By seamlessly integrating live one-on-one conversations with email, social media, search, and direct marketing channels, we ensure effective customer engagement and relationship building. Headquartered in Encino, CA, with a global footprint, Callbox has successfully executed over 20,000 campaigns across diverse B2B industries and global markets. Our Proven Track Record: 1.3M+ Qualified Leads Delivered: We connect you with high-quality leads that drive sales growth. 20+ Years of Expertise: Leverage our extensive experience in B2B lead generation to achieve sustainable growth. 20K+ Lead Gen Programs: Our track record demonstrates our ability to create and deliver successful lead generation campaigns. 15,000+ Clients Served: Join our roster of satisfied clients who have benefited from our tailored solutions. Callbox ensures campaign success with proprietary tools, including an extensive in-house B2B database, advanced lead nurturing capabilities, and robust pipeline management features. We align every strategy with your business goals, maximizing lead quality and conversion rates. We provide enriched prospect data and personalized lead nurturing programs to transition cold leads into warm prospects. Our content syndication services boost content distribution, increasing inbound lead generation and elevating brand visibility. Additionally, lead re-activation campaigns and Google retargeting ads help re-engage dormant leads and deliver personalized advertising based on user behavior. What’s New at Callbox Co-managed Sales Development Staff Augmentation Integrate dedicated SDRs directly into your internal workflow. This model combines the control of an in-house team with Callbox’s premium data, AI-powered tech stack, and recruitment infrastructure to scale your pipeline with lower overhead. Contact Us Today Ready to partner with one of the best lead generation companies in the industry? Toll-Free: +1 888.810.7464 General Inquiries: info@callboxinc.com Sales Assistance: sales@callboxinc.com

Average Rating: 4.5/5.0

Total Reviews: 91

Who Is the Company Behind Callbox?

  • Seller: Callbox
  • Year Founded: 2004
  • HQ Location: Encino, CA
  • Twitter: @CallboxInc
    3,992 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    114 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Information Technology and Services, Computer Software
  • Company Size: 58% Small, 36% Medium

What Do G2 Reviewers Say About Callbox?

AI-generated summary from verified user reviews

Pros
  • Users commend Callbox for their timely delivery, ensuring consistent updates and high-quality leads throughout the project.
  • Users value Callbox for its consistent delivery of high-quality BANT leads and proactive event support, enhancing online presence.
  • Users value the collaborative support from Callbox, enhancing campaign success through tailored communication and flexibility.
  • Users value the flexibility and initiative of Callbox, which adapts to changing business needs and feedback effectively.
  • Users appreciate the professionalism of Callbox, highlighting their responsive team and alignment with business needs.
Cons
  • Users experience payment issues with Callbox, as upfront payment requirements complicate their internal approval processes.
  • Users find the poor customer support frustrating, suggesting a need for localized and culturally aware assistance.

What Are Recent G2 Reviews of Callbox?

What Are G2 Users Discussing About Callbox?

Leadium

Leadium is a boutique, 100% US-based B2B outbound sales development agency. Founded in 2016, we run managed, outsourced SDR programs across cold calling, email, and LinkedIn that book qualified meetings on your calendar. We're founder-led by design. You work directly with the people who run the company, not a junior account manager juggling 20 logos. Every client gets a dedicated, US-based SDR who learns your business, your ICP, and your value proposition, and represents you like an internal hire. Calls are recorded, transcribed, and reviewed weekly, so you hear exactly what your market is saying and we adjust in real time. We cap our active client roster on purpose. Quality outbound can't be mass-produced, so we keep the team small, US-based, and focused on a limited number of engagements. All data and work product is 100% yours. What we do: - Managed outbound SDR programs (cold calling, email, LinkedIn) - ICP definition and target account list building - Contact data enrichment - Qualified meeting and appointment generation - Email infrastructure and deliverability setup - Outbound strategy and messaging Track record: since 2016 we've built over $1 billion in qualified pipeline across 1,500+ organizations, contributed to 89 acquisitions, and supported clients who've raised $6.5B+ and reached 5 IPOs. Leadium is NGLCC-certified (LGBTBE) and consistently rated among the top sales development agencies by Clutch, GoodFirms, and Inc. 5000. Pricing is flat and month-to-month, starting at $3,500/month for a dedicated cold-calling SDR, with no hidden fees. Want US-based outbound, founder-level attention, and a rep who actually learns your business? Let's talk.

Average Rating: 4.8/5.0

Total Reviews: 73

Who Is the Company Behind Leadium?

  • Seller: Leadium
  • Company Website:
  • Year Founded: 2016
  • HQ Location: Las Vegas, US
  • Twitter: @leadiumio
    123 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    51 employees on LinkedIn®

Who Uses This Product?

  • Who Uses This: Founder, Chief Executive Officer
  • Top Industries: Information Technology and Services, Financial Services
  • Company Size: 75% Small, 22% Medium

What Do G2 Reviewers Say About Leadium?

AI-generated summary from verified user reviews

Pros
  • Users commend Leadium for its data accuracy and tailored insights, enhancing their sales strategies effectively.
  • Users commend Leadium for their effective lead generation strategies, successfully targeting high-value decision-makers and shortening sales cycles.
  • Users praise Leadium for its strategic innovation, enhancing outreach and optimizing sales processes remarkably.
  • Users appreciate the genuine involvement of Leadium, feeling like an integral part of their team.
  • Users value Leadium's hands-on approach and effective use of modern technology in their outreach strategies.
Cons
  • Users report poor lead quality from Leadium, resulting in minimal leads and significant service dissatisfaction.
  • Users experience miscommunication challenges that slow down alignment and understanding of their unique software and marketing strategies.
  • Users note a high turnover rate, impacting team stability and continuity in using Leadium.
  • Users note insufficient training on the software, hindering effective understanding and communication of marketing strategies.
  • Users report poor customer support, facing unprofessional service and a lack of resolution for contract breaches.

What Are Recent G2 Reviews of Leadium?

ViB.Tech

ViB Tech is a B2B demand generation partner that helps technology companies connect with IT, cybersecurity, cloud, and DevOps decision-makers. Unlike providers that rely on scraped or purchased data, ViB activates its own professional network to deliver relevant, targeted engagement. Through email campaigns, qualified appointments, content syndication, and webinars, ViB helps marketing and demand generation teams reach the right audiences and generate measurable results. More than 500 technology organizations trust ViB Tech, and 84% of clients return year after year. ViB has also been recognized by the Inc. 5000 and Deloitte Technology Fast 500 for its continued growth. Contact us : 603-812-7399

Average Rating: 4.4/5.0

Total Reviews: 35

Who Is the Company Behind ViB.Tech?

  • Seller: ViB.Tech
  • Company Website:
  • Year Founded: 2010
  • HQ Location: Florida
  • Twitter: @VIBriefing
    1,294 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    97 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Information Technology and Services, Computer Software
  • Company Size: 46% Medium, 26% Large

What Do G2 Reviewers Say About ViB.Tech?

AI-generated summary from verified user reviews

Pros
  • Users highlight the exceptional customer support from a responsive and helpful professional team at ViB.Tech.
  • Users appreciate the targeting accuracy of ViB.Tech, consistently generating high-quality leads and effective registrations for events.
  • Users appreciate the quick response time of ViB.Tech, enhancing collaboration and overall satisfaction with their services.
  • Users appreciate the smooth communication of ViB.Tech, enhancing their experience and boosting event registrations effectively.
  • Users value the flexibility of ViB.Tech, appreciating their responsiveness and adaptability to specific needs and budget constraints.
Cons
  • Users find ViB.Tech to be expensive, especially for small and medium-sized businesses seeking affordable solutions.
  • Users note limited functionality in ViB.Tech's webinar platform and desire improvements for enhanced customer support.
  • Users report poor lead quality with ViB.Tech, citing issues like repeated leads and challenges in closing deals.
  • Users feel the lack of focused research in ViB.Tech leads to webcasts that stray from their intended purpose.
  • Users find the slow processes of ViB.Tech lead to prolonged sales cycles and unclear opportunities before meetings.

What Are Recent G2 Reviews of ViB.Tech?

What Are G2 Users Discussing About ViB.Tech?

Pipeful

Pipeful grows your business using AI, data, software, and services. No commitments. Cancel anytime.

Average Rating: 4.9/5.0

Total Reviews: 40

Who Is the Company Behind Pipeful?

  • Seller: Pipeful
  • Year Founded: 2000
  • HQ Location: San Francisco, CA
  • Twitter: @PipefulHQ
    11 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    110 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Information Technology and Services, Marketing and Advertising
  • Company Size: 73% Small, 18% Medium

What Do G2 Reviewers Say About Pipeful?

AI-generated summary from verified user reviews

Pros
  • Users value the high-quality and consistent leads from Pipeful, enhancing their chances of closing deals effectively.
  • Users praise Pipeful for their high-quality lead generation, effectively connecting them with decision-makers quickly.
  • Users commend Pipeful's exceptional professionalism, highlighting attention to detail and user-friendly software.
  • Users praise Pipeful for its exceptional response time, leading to high engagement and successful deals.
Cons
  • Users desire more transparent pricing for Pipeful, as current costs can be unclear and confusing.
  • Users express dissatisfaction with inefficient scheduling, preferring Zoom over Google meetings for better organization.
  • Users experience slow processes due to long waitlists but appreciate the team's commitment to improving efficiency.
  • Users desire more clear pricing information on Pipeful's website, highlighting an area for improvement in user experience.

What Are Recent G2 Reviews of Pipeful?

What Are G2 Users Discussing About Pipeful?

Appointment Setter Online

Appointment Setter Online is a premium B2B appointment setting and lead generation agency that books qualified sales meetings for businesses across all industries and company sizes. Whether you're in SaaS, healthcare, finance, real estate, logistics, or manufacturing, we deliver revenue-ready leads that convert—fast, reliably, and at scale. We’re not just another lead gen company. We’re the engine behind full calendars and accelerated revenue pipelines. Our agents are fluent, accent-free professionals, handpicked and trained to represent your brand with clarity, precision, and confidence. Why Choose Appointment Setter Online? Fluent, Zero-Accent Agents Every SDR speaks neutral, native-level English—ensuring smooth, professional conversations that eliminate friction and increase conversion. Free Trial – No Risk We’re so confident in our results that we offer a 1-day trial (100 calls, 1 agent) at zero cost. No fluff. No commitment. Just results. Conversion-Driven Process We don’t just book calls—we book qualified appointments. Clients routinely see up to 90% conversion from our leads to active opportunities. Advanced Tech Stack From CRM integrations to AI-driven prospect targeting, we blend tech and talent to deliver high-intent meetings that fit your ICP. Global 24/7 Coverage With SDRs across time zones (USA, UK, UAE, Australia), we engage prospects around the clock so you never miss a lead. All Industries. All Sizes. Whether you're a startup, SMB, or enterprise, we customize outreach campaigns to your industry, product, and sales goals. Transparent, Flexible, Scalable No hidden fees. No long-term contracts. Scale up or down as needed, and interview your SDRs before you commit. What You Get: Consistent stream of qualified B2B appointments Highly-trained SDRs that act as an extension of your sales team Full reporting, calendar management, and CRM syncing Industry-specific outreach campaigns tailored for real conversations and real results Hands-on support, rapid iteration, and real-time feedback loops Our Mission: Your Calendar – Our Mission. We book the meetings. You close the deals. Let us help you scale smarter, close faster, and lead your market.

Average Rating: 4.8/5.0

Total Reviews: 23

Who Is the Company Behind Appointment Setter Online?

Who Uses This Product?

  • Top Industries: Marketing and Advertising
  • Company Size: 104% Small, 13% Large

What Do G2 Reviewers Say About Appointment Setter Online?

AI-generated summary from verified user reviews

Pros
  • Users value the effective lead generation of Appointment Setter Online, significantly easing their outreach efforts and securing meetings.
  • Users value the high-quality lead generation from Appointment Setter Online, greatly improving efficiency and conversion rates.
  • Users value the effective communication and personalized approach of Appointment Setter Online, enhancing lead quality and engagement.
  • Users love the efficient meeting management of Appointment Setter Online, relieving stress and ensuring quality client connections.
  • Users commend the high professionalism of Appointment Setter Online, leading to meaningful connections and appointments.
Cons
  • Users experience high turnover during onboarding, which affects the initial setup and fine-tuning process.

What Are Recent G2 Reviews of Appointment Setter Online?

LinkedSDR

LINKEDSDR™ — Hire Real LinkedIn Reps to Scale Your Pipeline LinkedSDR™ helps agencies and B2B sales teams hire real, verified LinkedIn professionals to represent their brand through a secure and compliant infrastructure designed for scalable outreach. Each LINKEDSDR rep is a real person with an authentic LinkedIn presence, over one year old and with more than 500 genuine connections. We're built forOutbound agencies, GTM experts, and B2B sales teams who want to hire and scale professional LinkedIn reps safely and sustainably.

Average Rating: 4.9/5.0

Total Reviews: 15

Who Is the Company Behind LinkedSDR?

Who Uses This Product?

  • Top Industries: Marketing and Advertising
  • Company Size: 88% Small, 6% Medium

What Do G2 Reviewers Say About LinkedSDR?

AI-generated summary from verified user reviews

Pros
  • Users praise the amazing customer support of LinkedSDR, highlighting quick responses and effective service in the B2B space.
  • Users commend the timely and reliable delivery of LinkedSDR, exceeding expectations with a steady stream of quality meetings.
  • Users find LinkedSDR's goal achievement exceptional, consistently delivering quality meetings and valuable support in a hands-off manner.
  • Users commend the timely delivery of LinkedSDR, consistently meeting deadlines and exceeding expectations.
  • Users appreciate the ease of work with LinkedSDR, allowing smooth outreach and effective scaling on LinkedIn.

What Are Recent G2 Reviews of LinkedSDR?

Nexsales

Nexsales is a B2B pipeline generation partner designed to assist high-growth and enterprise organizations in transforming anonymous buying intent into a qualified sales pipeline. In an era where traditional lead generation methods are often inadequate, Nexsales offers a comprehensive solution tailored for revenue teams navigating a buyer-led and AI-influenced sales landscape. By addressing the complexities of modern B2B buying behavior, Nexsales empowers organizations to achieve predictable outcomes in their sales efforts. Modern B2B buyers engage in extensive research prior to initiating contact with sales teams, which can create significant visibility gaps in intent signals, account engagement, and opportunity progression. Nexsales effectively tackles these challenges by integrating data, outreach, reporting, and predictive intelligence into a cohesive revenue engine focused on enhancing pipeline performance. This structured approach is particularly beneficial for marketing, sales, and RevOps teams, as it allows for the identification of high-intent accounts, the generation of qualified conversations, and improved visibility throughout the sales process. The core capabilities of Nexsales include various lead generation programs that deliver qualified, conversation-ready meetings from targeted accounts aligned with specific Ideal Customer Profile (ICP) and Sales Qualified Lead (SQL) criteria. Additionally, the Account-Based Marketing (ABM) programs orchestrate engagement across buying groups, fostering sustained momentum and improving conversion rates for target accounts. The BDR orchestration feature enhances workflow design, sequencing, and routing logic, which helps to streamline the lead follow-up process and minimize potential losses in lead engagement. Nexsales also offers a unified revenue reporting system that consolidates critical data such as accounts, contacts, engagement metrics, intent signals, and opportunity data into a centralized cloud-based platform. This provides organizations with end-to-end visibility and insights into their sales pipeline. Furthermore, the predictive AI and revenue intelligence capabilities enable users to identify in-market accounts and assess their readiness for conversation, allowing teams to prioritize outreach effectively and determine the next best actions. Integration with existing CRM, marketing automation, and data systems ensures a seamless flow of clean data, facilitating coordinated execution across the go-to-market (GTM) stack. Nexsales is structured to accommodate both pilot-based engagements aimed at immediate pipeline generation and long-term initiatives focused on transforming revenue engines. By centering its operations around pipeline performance rather than mere channel activity, Nexsales enhances predictability, coordination, and visibility throughout the buyer journey, ultimately driving measurable outcomes such as qualified meetings, SQL progression, and improved conversion velocity.

Average Rating: 4.9/5.0

Total Reviews: 42

Who Is the Company Behind Nexsales?

  • Seller: Nexsales
  • Company Website:
  • Year Founded: 2008
  • HQ Location: Cupertino, US
  • LinkedIn® Page: www.linkedin.com
    70 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Computer Software, Market Research
  • Company Size: 55% Large, 40% Medium

What Do G2 Reviewers Say About Nexsales?

AI-generated summary from verified user reviews

Pros
  • Users value the effective lead generation strategies of Nexsales, enhancing targeting and improving outbound success.
  • Users value the actionable insights from Nexsales' data analytics, enhancing their sales strategy and revenue growth.
  • Users appreciate the actionable insights from Nexsales, significantly boosting their sales team's performance and revenue pipeline.
  • Users value the effective targeting approach of Nexsales, enhancing their ABM programs and aligning sales and marketing efforts.
  • Users appreciate the boosted engagement from Nexsales, simplifying the buyer journey and aligning teams effectively.
Cons
  • Users find the initial setup complex, requiring significant input, though support helps ease the process.
  • Users find difficult usability in Nexsales, particularly during initial navigation, which can hinder their experience.
  • Users find the onboarding process inefficient, particularly for smaller companies needing quicker results.
  • Users find the initial navigation challenging, taking time to adapt and fully utilize Nexsales effectively.
  • Users experienced some initial miscommunication, but issues were resolved effectively once raised with the team.

What Are Recent G2 Reviews of Nexsales?

Alanna Iwuh
A
Researched and written by Alanna Iwuh
Updated October 3, 2024