# Best Internet of Things (IoT) Developers in Greater London, England ## How Many Internet of Things (IoT) Developers Products Does G2 Track? **Total Products under this Category:** 200 ### Category Stats (Aug 2026) - **Average Rating:** 4.63/5 The average rating of products in this category, based on all submitted ratings _Last updated: August 05, 2026_ ## How Does G2 Rank Internet of Things (IoT) Developers Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 500+ Authentic Reviews - 200+ 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 Internet of Things (IoT) Developers ![G2 Grid® for Internet of Things (IoT) Developers plotting products by satisfaction and market presence](https://www.g2.com/categories/internet-of-things-iot-developers/grids.png?focus%5B%5D=169874&focus%5B%5D=23031&focus%5B%5D=69999) Highlighted products: Teravision Technologies, Algoworks, and Mercury Development. Underlying data: [Grid® JSON](https://www.g2.com/categories/internet-of-things-iot-developers/grids.json?focus%5B%5D=teravision-technologies&focus%5B%5D=algoworks&focus%5B%5D=mercury-development) **Sponsored** ### 800.com Smarter call tracking, now with AI Agents that answer when you can't. Never miss a call again. 800.com helps small businesses and agencies grow smarter with 800 AI Agents: intelligent agents that answer, handle, and qualify every inbound call, 24/7. 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AI features include: – 800 AI Agents that answer, handle, and qualify calls 24/7 – Call summaries, call scoring, and recommended next steps via 800 Intelligence – Data enrichment through Enhanced Caller ID — name, email, and address the moment the phone rings – Call transcription and sentiment analysis for deeper insight into customer interactions For agencies and advanced users, 800.com supports powerful tools like: – Dynamic Number Insertion (DNI) to track exact sources of inbound calls – Integrations with GA4, Google Ads, Meta, and Microsoft Ads – Client-level account management with white-labeled dashboards for a consistent brand experience across every account Built for SMBs but scalable for agencies, 800.com also includes: – Call forwarding, voicemail, and customizable IVR – Call recording and transcription with playback for training or QA – In-depth call analytics and reporting – SMS campaigns for direct customer engagement – Mobile app so your business line goes everywhere you go Looking for advanced call forwarding and routing with custom greetings and an auto-attendant? 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[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=1054&secure%5Bchosen_at%5D=2026-08-13T09%3A19%3A01Z&secure%5Bdisplayable_resource_id%5D=1389&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=retargeted_product&secure%5Bplacement_resource_ids%5D%5B%5D=125374&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=125374&secure%5Bresource_id%5D=1054&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Finternet-of-things-iot-developers%2Flocations%2Fgreater-london-england-gb&secure%5Btoken%5D=808b33f44b057b46a24266c33f7b8107cbe5b6022cb32b58819483916a6497f6&secure%5Burl%5D=https%3A%2F%2Fwww.800.com%2Fai-agents&secure%5Burl_type%5D=custom_url) ### [Appinventiv](https://www.g2.com/products/appinventiv/reviews) Appinventiv is an award-winning organization providing impeccable technology solutions to startups and Fortune 500 companies. The company which started its journey back in 2015, today stands strong at 650+ tech experts, engineers and professionals striving towards bridging the gaps between client ideas and reality. The sole aim is to facilitate a rich customer experience and smarter, innovative solutions through on-time delivery and post-development support. They have so far delivered 1000+ projects successfully. The company has on-board disruptive technologies such as Blockchain, Artificial Intelligence, Machine Learning, Internet of Things, among others. Their client list constitutes several recognizable names like Dominos, KPMG, IKEA, Karvan, Gully Beat and many more. This ever enthusiastic startup is challenging boundaries to bring more opportunities in every sector, be it Healthcare, Banking & Finance, Real Estate and Entertainment. **Average Rating:** 3.5/5.0 **Total Reviews:** 1 #### Who Is the Company Behind Appinventiv? - **Seller:** [Appinventiv](https://www.g2.com/sellers/appinventiv) - **Year Founded:** 2015 - **HQ Location:** Noida, IN - **Twitter:** @Appinventiv 7,359 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=66df000f097b5e2ed644f0cc906e0a660473a166b35a911db192d6087f76e5a9&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fappinventiv%2F&secure%5Burl_type%5D=linkedin_company_website) 1,384 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Medium #### What Are G2 Users Discussing About Appinventiv? - [What is Appinventiv used for?](https://www.g2.com/discussions/what-is-appinventiv-used-for) - 1 comment ### [Lemberg Solutions](https://www.g2.com/products/lemberg-solutions/reviews) We help to plan, design and build amazing digital products and our portfolio showcases it in the best way. #### Who Is the Company Behind Lemberg Solutions? - **Seller:** [Lemberg Solutions](https://www.g2.com/sellers/lemberg-solutions) - **Year Founded:** 2007 - **HQ Location:** Lviv, UA - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=8fd36e68b61f4d73917957f322e8824fed55fe34464199bbb42e987f81995cde&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Flemberg-solutions-limited&secure%5Burl_type%5D=linkedin_company_website) 203 employees on LinkedIn® ### [One Beyond](https://www.g2.com/products/one-beyond/reviews) One Beyond is a multi-award winning bespoke software development company, with Headquarters in Farnborough, Hampshire, and engineering centres of excellence in London, Manchester, Madrid, Seville, Bucharest, Budapest and Szeged. Since 1994, we’ve created intelligent, cost-effective and intuitive web applications, desktop applications and mobile apps for established businesses, non-profits, government organisations and funded start-ups. We have a team of over 300 across our international business. One Beyond delivers large scale digital transformation, team augmentation, delivery of discrete Agile projects and world class bespoke software using complementary tech including, but not limited to, Microsoft .NET, Power BI, React and Node.js. The company’s capabilities also include DevOps proficiency and deployment on Azure and AWS. Accredited with Microsoft Gold Partner status, as well as ISO 9001 & ISO 27001, the firm’s highly competitive services are leveraged through an optimal blend of international delivery centres either UK-based or nearshore, all operating under One Beyond’s best practice methodology and with a partnership approach, to generate consistent and superior quality products and services. #### Who Is the Company Behind One Beyond? - **Seller:** [One Beyond](https://www.g2.com/sellers/one-beyond) - **Year Founded:** 1994 - **HQ Location:** Farnborough, GB - **Twitter:** @OneBeyond\_ 78 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=1a8adee66c2fa69a853ea196542f25f71b07876a7dde1e876c37b412270f05cf&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fonebeyond&secure%5Burl_type%5D=linkedin_company_website) 211 employees on LinkedIn® ### [Smartym Pro](https://www.g2.com/products/smartym-pro/reviews) Smartum Pro is a full-cycle development company specialized in enterprise web and mobile application development. #### Who Is the Company Behind Smartym Pro? - **Seller:** [Smartym Pro](https://www.g2.com/sellers/smartym-pro-6bc2dad1-681f-4338-b8a8-942afd4ba9b1) - **Year Founded:** 2012 - **HQ Location:** Warsaw, PL - **Twitter:** @Smartum\_Pro 760 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=86bbe715b0d63f65d2ca05c89c69f52745a5fcd9d6f9409b3094a4f6ab9fa770&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fsmartym-pro%2F&secure%5Burl_type%5D=linkedin_company_website) 21 employees on LinkedIn® ### [Tapptitude](https://www.g2.com/products/tapptitude/reviews) Tapptitude is a Product Studio that partners with funded startups and established brands to build interactive, mobile-first digital products that people love to use. We work with our clients as Product Partners, supporting them proactively throughout the journey from idea to launching a product and scaling it up. Startups and brands work with us to define their product, design their prototype, develop and iterate their MVP in order to create a successful business. Our process stands out through our early focus on value and close partnerships. We work on each product to identify and create easy acquisition flows, generate value early to retain users, and build a solid infrastructure for scalability. Our workflows are based on lean principles, rapid prototyping techniques and agile development, making us very fast and flexible in iterating value to users. Our solutions for startups: • Product definition • Rapid prototyping • MVP development Our solutions for larger organisations: • Design sprints • UX research and persona design • Evidence-based growth plan Our technical team delivers full-stack implementation solutions, to build Native and React Native products for iOS, Android, Wearable Devices and the Web. Our services include: • Product strategy and definition • UX/UI design • Native and cross-platform Mobile Development • Web & Backend Development • DevOps • AI, Machine learning and Data Science • Manual & Automated QA • Product launch solutions • Product growth We’ve built products for industries like: • IoT • Health • Proptech • Fintech • Marketplaces and retail • Social platforms • Arts, entertainment and culture **Average Rating:** 4.9/5.0 **Total Reviews:** 31 #### Who Is the Company Behind Tapptitude? - **Seller:** [Tapptitude](https://www.g2.com/sellers/tapptitude) - **Year Founded:** 2013 - **HQ Location:** Cluj-Napoca, Cluj - **Twitter:** @Tapptitude 303 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=90f727f1577e15abd378d40c9f277a7a04239a1081ef25ca0dd737dacd475a1f&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ftapptitude&secure%5Burl_type%5D=linkedin_company_website) 34 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 74% Small, 23% Medium #### What Do G2 Reviewers Say About Tapptitude? _AI-generated summary from verified user reviews_ ##### Pros - Users commend Tapptitude for their **high professionalism** , enjoying their knowledgeable and responsive team in the development process. - Users value Tapptitude's **strong execution and collaborative spirit** , resulting in a smooth and effective development process. - Users commend the **quality of execution** from Tapptitude, ensuring reliable and timely project development experiences. - Users value the **fast response times** from Tapptitude, ensuring efficient communication and project management. - Users value Tapptitude's **commitment to collaboration and responsiveness** , enhancing the development process and fostering teamwork. ##### Cons - Users face **communication issues** that can lead to misunderstandings and challenges, especially with language barriers involved. - Users face **lack of communication** that complicates collaboration and creates misunderstandings, particularly due to language barriers. - Users experience **project delays** due to communication challenges and timeline adherence, impacting overall satisfaction with Tapptitude. - Users find **timezone differences challenging** , but Tapptitude's round-the-clock availability helps mitigate the issue. - Users find **time zone issues** challenging, yet appreciate Tapptitude’s round-the-clock availability for support. #### What Are Recent G2 Reviews of Tapptitude? **["Exceptional Service during and after the project + very Fast Support"](https://www.g2.com/survey_responses/tapptitude-review-12179679)** **Rating:** 5.0/5.0 stars _— findmyfitbuddy o._ [Read full review](https://www.g2.com/survey_responses/tapptitude-review-12179679) **["Tapptitude Professionals Delivered a Fantastic Solution"](https://www.g2.com/survey_responses/tapptitude-review-12710541)** **Rating:** 5.0/5.0 stars _— Tudor Draghiciu D._ [Read full review](https://www.g2.com/survey_responses/tapptitude-review-12710541) ### [ustwo studio](https://www.g2.com/products/ustwo-studio/reviews) We champion unrivalled user experience design and best-in-class technical practices, but we recognise that product is so much more than either of these in isolation. #### Who Is the Company Behind ustwo studio? - **Seller:** [ustwo fampany ltd](https://www.g2.com/sellers/ustwo-fampany-ltd) - **Year Founded:** 2004 - **HQ Location:** London, GB - **Twitter:** @ustwo 23,567 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=d8a5a051f2616d5f4ce2a06261bd7a68c933b83dd6e2ce80226bfba4122491ea&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fustwo-&secure%5Burl_type%5D=linkedin_company_website) 142 employees on LinkedIn® ### [Vakoms](https://www.g2.com/products/vakoms/reviews) Your reliable IT partner to build a product from scratch or refine your business #### Who Is the Company Behind Vakoms? - **Seller:** [Vakoms](https://www.g2.com/sellers/vakoms) - **Year Founded:** 2010 - **HQ Location:** Wrocław, PL - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=eb6880b36f975349d20029adb09c9a184c496892717a8463f45f376793d41df7&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fvakoms&secure%5Burl_type%5D=linkedin_company_website) 76 employees on LinkedIn® Spotlight Categories [Accounting Software](https://www.g2.com/categories/accounting) [Threat Intelligence Software](https://www.g2.com/categories/threat-intelligence) [Contact Center Software](https://www.g2.com/categories/contact-center) [Payroll Software](https://www.g2.com/categories/payroll) [Customer Data Platforms (CDP)](https://www.g2.com/categories/customer-data-platform-cdp) Similar Categories - [Android Developers](/categories/android-developers) - [Cross-Platform Developers](/categories/cross-platform-developers) - [iOS Developers](/categories/ios-developers) - [Wearable App Development](/categories/wearable-app-development) - [Windows Developers](/categories/windows-developers) ![Adam Crivello](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Adam Crivello") AC Researched and written by [Adam Crivello](https://research.g2.com/insights/author/adam-crivello) Updated October 3, 2024 The internet of things (IoT) is a term used to describe the growing network of appliances, homes, and various “smart objects" that communicate with each other to automate and optimize performance. These smart devices generate analytics based on environment and usage habits, and in many cases learn to adjust functionality and perform key tasks without manual commands. IoT developers design and build new smart devices as well as the mobile applications that act as central hubs for a user’s interconnected objects. Businesses can work with IoT development firms to add IoT functionality to their workplaces and build custom smart objects to suit the companies’ needs. A number of [mobile app development firms](https://www.g2.com/categories/mobile-app-development) are expanding to offer IoT development services to meet the increasing demand and popularity of smart devices. [IoT management software](https://www.g2.com/categories/iot-management) helps both users and developers sync, control, and monitor smart devices in a local network. Show More