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Developer Tools startups founded in 2021

35 developer Tools startups founded in 2021 have raised money in rounds we track. These are the 35 that have raised the most, $665M between them, with the United States the most common home.

$665Mraised by these 35
35on our record in all
United Statesmost common home
Convexraised the most
  1. 1ConvexConvex is a San Francisco-based company that offers an open-source reactive backend platform designed for web developers.

    Convex is a San Francisco-based company that offers an open-source reactive backend platform designed for web developers.

    Founded 2021San Francisco, United States$120Mlast round Aug 2026
  2. 2Ox SecurityOx Security is the first end-to-end security solution to prevent attacks across your software.

    Ox Security is the first end-to-end security solution to prevent attacks across your software.

    Founded 2021Tel Aviv, United States$60Mlast round May 2025
  3. 3AirOpsAirOps is an enterprise-level content engineering platform that specializes in AI search growth.

    AirOps is an enterprise-level content engineering platform that specializes in AI search growth.

    Founded 2021San Francisco, United States$56Mlast round Nov 2025
  4. 4Method FinancialMethod Financial is a financial connectivity API for consumer liability data + payments

    Method Financial is a financial connectivity API for consumer liability data + payments

    Founded 2021New York, United States$42Mlast round Jan 2025
  5. 5RISC Zero.RISC Zero is a Seattle-based software development company founded in 2021.

    RISC Zero is a Seattle-based software development company founded in 2021.

    Founded 2021Seattle, United States$40Mlast round Jul 2023
  6. 6Product ScienceProduct Science is a deeptech startup founded in 2021, based in Los Angeles, California.

    Product Science is a deeptech startup founded in 2021, based in Los Angeles, California.

    Founded 2021Los Angeles, United States$35Mlast round Jan 2023
  7. 7FloxFlox is a software development platform that creates reproducible environments for the entire software lifecycle.

    Flox is a software development platform that creates reproducible environments for the entire software lifecycle.

    Founded 2021New York, United States$29Mlast round Sept 2025
  8. 8ReflexThe Reflex technology platform connects top-retail associates with retailers when they need staffing help.

    The Reflex technology platform connects top-retail associates with retailers when they need staffing help.

    Founded 2021United States$28Mlast round Oct 2026
  9. 9StainlessStainless is building the platform for high-quality, easy-to-use APIs

    Stainless is building the platform for high-quality, easy-to-use APIs

    Founded 2021New York, United States$25Mlast round Dec 2024
  10. 10VarianceVariance is an AI-powered risk intelligence platform designed to help enterprises detect and manage fraud, user-generated content violations, and marketplace abuse.

    Variance is an AI-powered risk intelligence platform designed to help enterprises detect and manage fraud, user-generated content violations, and marketplace abuse.

    Founded 2021San Francisco, United States$25Mlast round Apr 2026
  11. 11JunctionDevelopers at leading digital health companies, from Metabolic clinics to Longevity, use Junction to remotely access granular health data from wearables and lab tests.

    Developers at leading digital health companies, from Metabolic clinics to Longevity, use Junction to remotely access granular health data from wearables and lab tests.

    Founded 2021New York, United States$21Mlast round Mar 2025
  12. 12DevZeroDevZero, based in Seattle, is a software development startup focused on enhancing developer productivity and optimizing cloud infrastructure.

    DevZero, based in Seattle, is a software development startup focused on enhancing developer productivity and optimizing cloud infrastructure.

    Founded 2021Seattle, United States$21Mlast round Jan 2023
  13. 13DecodableDecodable is a serverless data integration and engineering platform for streaming data.

    Decodable is a serverless data integration and engineering platform for streaming data.

    Founded 2021San Francisco, United States$20Mlast round Feb 2022
  14. 14SalsaSalsa, founded in 2021 by Juan Barroso and John Kramer, is an embedded payroll provider based in San Francisco, California.

    Salsa, founded in 2021 by Juan Barroso and John Kramer, is an embedded payroll provider based in San Francisco, California.

    Founded 2021San Francisco, United States$20Mlast round Apr 2025
  15. 15TrueFoundryTrueFoundry provides the fastest framework for Post model Pipeline to Data Scientists and ML Engineers.

    TrueFoundry provides the fastest framework for Post model Pipeline to Data Scientists and ML Engineers.

    Founded 2021Hayward Park, India$19Mlast round Feb 2025
  16. 16Agave GamesAgave Games is a mobile gaming studio based in Istanbul, Turkey, founded in 2021 by four experienced game developers.

    Agave Games is a mobile gaming studio based in Istanbul, Turkey, founded in 2021 by four experienced game developers.

    Founded 2021Istanbul, Türkiye$18Mlast round Dec 2024
  17. 17HeraldHerald builds digital infrastructure for commercial insurance.

    Herald builds digital infrastructure for commercial insurance.

    Founded 2021Boston, United States$12Mlast round Oct 2024
  18. 18FlexpaFlexpa allows digital health apps to connect to new patient access APIs.

    Flexpa allows digital health apps to connect to new patient access APIs.

    Founded 2021San Francisco, United States$8.6Mlast round Nov 2022
  19. 19CerebriumCerebrium is a modern data and AI platform for your business that doesn't require an entire data team.

    Cerebrium is a modern data and AI platform for your business that doesn't require an entire data team.

    Founded 2021London, South Africa$8.5Mlast round Jul 2025
  20. 20SvixSvix is an open-source webhooks-as-a-service platform founded in 2021, designed to help companies send, receive, and test webhooks efficiently and securely.

    Svix is an open-source webhooks-as-a-service platform founded in 2021, designed to help companies send, receive, and test webhooks efficiently and securely.

    Founded 2021San Francisco, United States$7.8Mlast round Feb 2023
  21. 21CerbosCerbos is an enterprise authorization management platform founded in 2021 and based in London, UK.

    Cerbos is an enterprise authorization management platform founded in 2021 and based in London, UK.

    Founded 2021London, United Kingdom$7.5Mlast round Apr 2023
  22. 22configure8configure8 is a commercial internal developer portal platform that helps engineering teams build software more efficiently.

    configure8 is a commercial internal developer portal platform that helps engineering teams build software more efficiently.

    Founded 2021McLean, United States$7.2Mlast round Sept 2022
  23. 23DotfileDotfile is a Paris-based fintech and regulatory technology startup founded in 2021 by Vasco Alexandre and Titouan Benoit.

    Dotfile is a Paris-based fintech and regulatory technology startup founded in 2021 by Vasco Alexandre and Titouan Benoit.

    Founded 2021Paris, France$6.7Mlast round Sept 2024
  24. 24ToolpathToolpath is an AI-driven software company founded in 2021, based in Atlanta, Georgia.

    Toolpath is an AI-driven software company founded in 2021, based in Atlanta, Georgia.

    Founded 2021Atlanta, United States$6.6Mlast round May 2025
  25. 25GrafbaseGrafbase is an edge-native GraphQL platform that integrates multiple data sources into a single, high-performance API.

    Grafbase is an edge-native GraphQL platform that integrates multiple data sources into a single, high-performance API.

    Founded 2021San Francisco, United States$5.0Mlast round Oct 2022
  26. 26Lost Lake GamesLost Lake Games is an independent studio committed to making games that blaze new trails and spark the next adventure.

    Lost Lake Games is an independent studio committed to making games that blaze new trails and spark the next adventure.

    Founded 2021Seattle, United States$5.0Mlast round Feb 2022
  27. 27MentumMentum is an API for fintech companies that offers investment services.

    Mentum is an API for fintech companies that offers investment services.

    Founded 2021San Francisco, United States$4.2Mlast round May 2022
  28. 28RowyBuild your product backend as easy as using spreadsheets.

    Build your product backend as easy as using spreadsheets.

    Founded 2021San Francisco, United States$3.0Mlast round Dec 2022
  29. 29Haste ArcadeThe Haste Arcade is a marketplace where gamers discover the hottest new ILP games.

    The Haste Arcade is a marketplace where gamers discover the hottest new ILP games.

    Founded 2021Hermosa Beach, United States$1.5Mlast round Jun 2022
  30. 30PelmPelm provides digital infrastructure to develop API for accessing and managing user's energy data.

    Pelm provides digital infrastructure to develop API for accessing and managing user's energy data.

    Founded 2021San Francisco, United States$500Klast round Mar 2022
  31. 31SparklesSparkles is the open NFT market on Songbird and the Flare Network.

    Sparkles is the open NFT market on Songbird and the Flare Network.

    Founded 2021United States$500Klast round Mar 2026
  32. 32Invisible CodeBuddyInvisible CodeBuddy is a SAAS platform that offers custom-built codeKits to help users gain an advantage on coding tasks.

    Invisible CodeBuddy is a SAAS platform that offers custom-built codeKits to help users gain an advantage on coding tasks.

    Founded 2021Lincoln, United States$490Klast round Dec 2023
  33. 33BclipseBclipse is a creative game platform where anyone can become a creator with a game development engine.

    Bclipse is a creative game platform where anyone can become a creator with a game development engine.

    Founded 2021Seongnam$447Klast round Apr 2021
  34. 34MetabobAutomatically detect severe and more relevant problems and vulnerabilities early in the development process with the help of AI.

    Automatically detect severe and more relevant problems and vulnerabilities early in the development process with the help of AI.

    Founded 2021United States$247Klast round Sept 2023
  35. 35beecrowdThe Ecosystem where Innovative Companies find the best Tech Talent

    The Ecosystem where Innovative Companies find the best Tech Talent

    Founded 2021São Paulo, Brazil$100Klast round Jun 2025
Total fundinghow the list is ranked
15 November 2026updated nightly
Rounds we tracksource: Millionrounds

Companies founded in 2021 whose funding rounds we classed in this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

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