# Top Free Supply Side Platforms (SSP) ## How Many Supply Side Platforms (SSP) Products Does G2 Track? **Total Products under this Category:** 101 ### Category Stats (Aug 2026) - **Average Rating:** 4.28/5 The average rating of products in this category, based on all submitted ratings _Last updated: August 01, 2026_ ## How Does G2 Rank Supply Side Platforms (SSP) Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 1,100+ Authentic Reviews - 101+ 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 Supply Side Platforms (SSP) ![G2 Grid® for Supply Side Platforms (SSP) plotting products by satisfaction and market presence](https://www.g2.com/categories/supply-side-platform-ssp/grids.png?focus%5B%5D=5110&focus%5B%5D=1405571&focus%5B%5D=65056&focus%5B%5D=63667&focus%5B%5D=1702679&focus%5B%5D=101287&focus%5B%5D=8713&focus%5B%5D=4909) Highlighted products: Google Ad Manager, Opti Digital, 33Across, EX.CO, BidMachine, GaleForceMedia, Sharethrough, and OpenX. Underlying data: [Grid® JSON](https://www.g2.com/categories/supply-side-platform-ssp/grids.json?focus%5B%5D=google-ad-manager&focus%5B%5D=opti-digital&focus%5B%5D=33across&focus%5B%5D=ex-co&focus%5B%5D=bidmachine&focus%5B%5D=galeforcemedia&focus%5B%5D=sharethrough&focus%5B%5D=openx) **Sponsored** ### SalesIntel SalesIntel is the pipeline generation platform for GTM teams. We help sales and marketing teams find accounts that match their ideal customer profile, surface the buying signals that show who's in-market, and use AI agents to automate manual prospecting work. That gives teams more time to focus on what humans do best: building relationships with prospects. Everything runs on a foundation of human-verified B2B data. Rather than guessing which accounts to prioritize, teams get verified contacts, deep company and technographic detail, and real-time buying signals, so every account and contact is enriched with the context needed to engage at the right moment. With that data and signal foundation in place, AI agents take on repetitive GTM tasks such as account prioritization, research, and enrichment. They filter for accounts that match a team's ICP, then surface the right leads for the right rep, cadence, or CRM record, reducing the time spent searching for information. SalesIntel's core capabilities include: Data Management: human-verified contact and company data that keeps CRM records accurate and current. ICP Modeling: tools to define, refine, and enrich an ideal customer profile so teams know exactly who to target. Inbound Lead Management: enrichment the moment a lead converts, so context flows directly into existing workflows. Outbound Prioritization: named account prioritization synced with Salesforce and HubSpot, paired with a no-code workflow builder for building signal-triggered plays. GTM Execution: tools that turn account and signal intelligence into targeted advertising and outreach. Together, these capabilities give sales and marketing teams a shared view of the same data, the same signals, and the same accounts, helping them build pipeline with less manual work and more informed context throughout the buying journey. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list_llm&secure%5Bcategory_id%5D=286&secure%5Bchosen_at%5D=2026-08-15T08%3A39%3A32Z&secure%5Bdisplayable_resource_id%5D=497&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=retargeted_product&secure%5Bplacement_resource_ids%5D%5B%5D=66769&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=66769&secure%5Bresource_id%5D=286&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Fsupply-side-platform-ssp%2Ffree&secure%5Btoken%5D=59785351083fc1dc47df27841d7d0fd9eb13bacedc8103260f69bb7e7e509ae6&secure%5Burl%5D=https%3A%2F%2Fsalesintel.io%2Fpipeline-generation%2F%3Futm_campaign%3D%26utm_source%3Dg2%26utm_medium%3Dreferral&secure%5Burl_type%5D=custom_url) ### [Opti Digital](https://www.g2.com/products/opti-digital/reviews) Opti Digital is an advertising technology (AdTech) designed to help media publishers optimize their advertising revenue through innovative and effective strategies. Established in 2018, Opti Digital focuses on providing advanced technologies that enhance the monetization capabilities of publishers and advertisers alike. With a commitment to innovation and efficiency, the company employs cutting-edge solutions such as dynamic flooring, original ad formats, ad optimization features, real-time granular insights and an ad management wrapper to meet the evolving needs of the digital advertising landscape. The target audience for Opti Digital includes global media publishers and channel partners seeking to maximize their advertising revenue while navigating the complexities of the digital marketplace. By leveraging artificial intelligence and data-driven strategies, Opti Digital empowers its clients to unlock new monetization opportunities and remain competitive in a rapidly changing environment. The platform is particularly beneficial for publishers who are looking to enhance their ad performance and optimize their ad inventory management. Key features of Opti Digital include dynamic price flooring, which allows publishers to set flexible pricing strategies for their ad inventory, and innovative ad formats, based on social display ads that engage users while maximizing revenue potential. The ad management wrapper simplifies the integration of various ad technologies, enabling publishers to streamline their operations and improve overall efficiency. Additionally, Opti Digital is committed to providing cookieless solutions, which are increasingly important in today's privacy-conscious digital landscape. This focus not only helps clients stay compliant with regulations but also positions them to adapt to future changes in the advertising ecosystem. Opti Digital's partnerships with notable publishers and organizations, such as Euronews, 1XL, Sporskeeda, Valnet, Verticalscope, Snack Media, Gizmodo, and the IAB’s Transparency and Consent Framework, further enhance its credibility and reach within the industry. As a recognized Google Certified Publishing Partner (GCPP) and a technology partner of Prebid, Opti Digital demonstrates its commitment to transparency and best practices in digital advertising. By prioritizing sustainability and reducing the carbon footprint of ads, Opti Digital also aligns with the growing demand for environmentally responsible advertising solutions. This multifaceted approach ensures that publishers can not only optimize their revenue but also contribute positively to the industry and the environment. **Average Rating:** 4.5/5.0 **Total Reviews:** 39 #### How Do G2 Users Rate Opti Digital? - **SSP Functionality :** 8.8/10 (Category avg: 8.3/10) - **Impression Targeting:** 8.7/10 (Category avg: 8.4/10) - **Ease of Admin:** 9.0/10 (Category avg: 8.4/10) - **Bid Reporting:** 7.4/10 (Category avg: 8.1/10) #### Who Is the Company Behind Opti Digital? - **Seller:** [Opti Digital](https://www.g2.com/sellers/opti-digital) - **Company Website:** www.optidigital.com - **Year Founded:** 2018 - **HQ Location:** Céret, FR - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=4961eeb7317156809d0d201ebcaff4c911db30c634510a24605e5f5d86227567&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Foptidigitalsas&secure%5Burl_type%5D=linkedin_company_website) 50 employees on LinkedIn® #### Who Uses This Product? - **Top Industries:** Marketing and Advertising, Online Media - **Company Size:** 57% Small, 40% Medium #### What Are Recent G2 Reviews of Opti Digital? **["Cutting-edge Technology and Responsive Team"](https://www.g2.com/survey_responses/opti-digital-review-12960556)** **Rating:** 5.0/5.0 stars _— Rodolphe V._ [Read full review](https://www.g2.com/survey_responses/opti-digital-review-12960556) **["Responsive Team, Global Reach, Real Results"](https://www.g2.com/survey_responses/opti-digital-review-13035441)** **Rating:** 4.5/5.0 stars _— Verified User in Media Production_ [Read full review](https://www.g2.com/survey_responses/opti-digital-review-13035441) ### [EX.CO](https://www.g2.com/products/ex-co/reviews) EX.CO is the smarter video technology company harnessing the power of machine learning to maximize revenue across every screen—web, mobile apps, CTV, and DOOH. As a trusted partner to leading media organizations worldwide—including Advance Local, Hearst Newspapers, Motorsport Network, The Arena Group, and Ziff Davis—EX.CO sets the standard for video monetization with its online video platform and AI-driven yield engine, built for growth, control, and transparency. Since 2012, EX.CO has been shaping the future of video. Headquartered in New York City with a global team, the company is proudly backed by The Walt Disney Company, Saban Ventures, Viola Group, 83North, and others. **Average Rating:** 4.3/5.0 **Total Reviews:** 23 #### How Do G2 Users Rate EX.CO? - **SSP Functionality :** 10.0/10 (Category avg: 8.3/10) - **Ease of Admin:** 8.5/10 (Category avg: 8.4/10) #### Who Is the Company Behind EX.CO? - **Seller:** [EX.CO](https://www.g2.com/sellers/ex-co) - **Year Founded:** 2012 - **HQ Location:** New York, US - **Twitter:** @EXCOPlatform 196 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=a6f82ecf7133b5cab19dc99274dfd0550adc1b0d450d7948488ef2d65aa92378&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fexcoplatform%2F&secure%5Burl_type%5D=linkedin_company_website) 262 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 40% Medium, 36% Small #### What Do G2 Reviewers Say About EX.CO? _AI-generated summary from verified user reviews_ ##### Pros - Users highlight the **outstanding customer support** of EX.CO, noting responsiveness and exceptional collaboration throughout the setup process. - Users commend EX.CO for its **exceptional customer satisfaction** , highlighting outstanding service and responsiveness to individual needs. - Users value the **immediate impact on revenue** from EX.CO, enhancing business growth with excellent support and ease of use. - Users value the **flexibility and monetisation support** of EX.CO, enhancing user experience and revenue generation. - Users appreciate the **ease of use** of EX.CO, enjoying a seamless setup and effective customer support throughout. ##### Cons - Users find the **dashboard issues** in EX.CO hinder their ability to effectively analyze video performance and metrics. - Users note the **analytics limitations** of EX.CO, wishing for improved depth in video performance metrics. - Users face **cost limitations** with EX.CO, affecting access to tailored syndicated content for specific needs. - Users experience a **short learning curve** with EX.CO while optimizing placements, though support is helpful. - Users note that the **limited geographic data** restricts access to relevant syndicated content for hyper-local needs. #### What Are Recent G2 Reviews of EX.CO? **["Seamless Video Monetisation with Excellent Support"](https://www.g2.com/survey_responses/ex-co-review-12307406)** **Rating:** 5.0/5.0 stars _— Petra C._ [Read full review](https://www.g2.com/survey_responses/ex-co-review-12307406) **["Exceptional Support and Strategic Vision Elevate Our Experience"](https://www.g2.com/survey_responses/ex-co-review-12114614)** **Rating:** 4.5/5.0 stars _— Mike I._ [Read full review](https://www.g2.com/survey_responses/ex-co-review-12114614) ### [Broadsign](https://www.g2.com/products/broadsign/reviews) Broadsign is an end-to-end software solution for media owners and buyers to holistically plan, manage and deliver out-of-home media. For Media owners: Broadsign empowers media owners to efficiently scale, manage, and sell their digital and static out-of-home inventory through automated software, intelligent campaign tools, powerful network operations, and programmatic advertising. For Brands & Agencies: Reach audiences with dynamic and flexible campaigns that deliver quality impressions in real-time. With programmatic DOOH, you can deliver contextual, targeted messaging that drives impact at every stage of your audience's journey. **Average Rating:** 4.4/5.0 **Total Reviews:** 15 #### How Do G2 Users Rate Broadsign? - **Ease of Admin:** 7.2/10 (Category avg: 8.4/10) #### Who Is the Company Behind Broadsign? - **Seller:** [Broadsign](https://www.g2.com/sellers/broadsign) - **Year Founded:** 2004 - **HQ Location:** Montreal, Quebec - **Twitter:** @BroadSign 5,814 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=4d7582bc46ab37c84eceab742be84150ae4602322c585602afb64c3b0ff21fff&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fbroadsign&secure%5Burl_type%5D=linkedin_company_website) 397 employees on LinkedIn® - **Phone:** 877-399-1184 #### Who Uses This Product? - **Top Industries:** Marketing and Advertising - **Company Size:** 47% Small, 27% Large #### What Are Recent G2 Reviews of Broadsign? **["A mature solution for pros: rich feature set, reliable performance and APIs"](https://www.g2.com/survey_responses/broadsign-review-8282355)** **Rating:** 5.0/5.0 stars _— Khalil H._ [Read full review](https://www.g2.com/survey_responses/broadsign-review-8282355) **["Seamless, efficient and data powered campaigns"](https://www.g2.com/survey_responses/broadsign-review-8723412)** **Rating:** 5.0/5.0 stars _— Marita O._ [Read full review](https://www.g2.com/survey_responses/broadsign-review-8723412) #### What Are G2 Users Discussing About Broadsign? - [What is Broadsign control?](https://www.g2.com/discussions/what-is-broadsign-control) - 1 comment - [What are the features of a digital signage?](https://www.g2.com/discussions/broadsign-what-are-the-features-of-a-digital-signage) - [What does Broadsign do?](https://www.g2.com/discussions/what-does-broadsign-do) ### [Sulvo Surge](https://www.g2.com/products/sulvo-surge/reviews) Sulvo is an ad server, a marketplace and a pricing engine in one. Sulvo's pricing tools help publishers discover the true value of their inventory so they can prevent underselling valuable ad inventory. **Average Rating:** 3.4/5.0 **Total Reviews:** 4 #### How Do G2 Users Rate Sulvo Surge? - **SSP Functionality :** 0.0/10 (Category avg: 8.3/10) - **Impression Targeting:** 0.0/10 (Category avg: 8.4/10) - **Ease of Admin:** 5.0/10 (Category avg: 8.4/10) - **Bid Reporting:** 0.0/10 (Category avg: 8.1/10) #### Who Is the Company Behind Sulvo Surge? - **Seller:** [Sulvo](https://www.g2.com/sellers/sulvo) - **Year Founded:** 2013 - **HQ Location:** New York, US - **Twitter:** @SulvoX 282 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=1857c9f35575d4d93b5d5cc8244972998fa6e099a40171f14a747b247d5f3fb3&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2F3184659&secure%5Burl_type%5D=linkedin_company_website) 8 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Small #### What Are Recent G2 Reviews of Sulvo Surge? **["Best Ad managment platforms that offer no ad serving fee upto 250M ad impression"](https://www.g2.com/survey_responses/sulvo-surge-review-5157809)** **Rating:** 5.0/5.0 stars _— Verified User in Financial Services_ [Read full review](https://www.g2.com/survey_responses/sulvo-surge-review-5157809) **["Really efficient, effective & easy ad management platform."](https://www.g2.com/survey_responses/sulvo-surge-review-5450591)** **Rating:** 4.5/5.0 stars _— Pranjal P._ [Read full review](https://www.g2.com/survey_responses/sulvo-surge-review-5450591) #### What Are G2 Users Discussing About Sulvo Surge? - [What is Sulvo Surge used for?](https://www.g2.com/discussions/what-is-sulvo-surge-used-for) Spotlight Categories [Sales Performance Management Software](https://www.g2.com/categories/sales-performance-management) [Integration Platform as a Service (iPaaS) Solutions](https://www.g2.com/categories/ipaas) [Demand Side Platform (DSP)](https://www.g2.com/categories/demand-side-platform-dsp) [Corporate Performance Management (CPM) Software](https://www.g2.com/categories/corporate-performance-management-cpm) [Data Science and Machine Learning Platforms](https://www.g2.com/categories/data-science-and-machine-learning-platforms) Similar Categories - [Ad Networks](/categories/ad-networks) - [App Monetization Platforms](/categories/app-monetization-platforms) - [Audience Data Providers](/categories/audience-data-providers) - [Click Fraud](/categories/click-fraud) - [Connected TV (CTV) Advertising Platforms](/categories/connected-tv-ctv-advertising-platforms) - [Creative Management Platforms](/categories/creative-management-platforms) - [Cross-Channel Advertising](/categories/cross-channel-advertising) - [Data Management Platform (DMP)](/categories/data-management-platform-dmp) - [Demand Side Platform (DSP)](/categories/demand-side-platform-dsp) - [Digital Advertising Intelligence](/categories/digital-advertising-intelligence) - [Digital Audio Advertising](/categories/digital-audio-advertising) - [Display Advertising](/categories/display-advertising) - [Identity Resolution](/categories/identity-resolution) - [Media Sales Software](/categories/media-sales-software) - [Mobile Advertising](/categories/mobile-advertising) [Browse Supply Side Platform (SSP) Themes](/categories/supply-side-platform-ssp/themes)