The fastest-growing open-source startups in Q4 2020

Snapshot of ROSS Index featuring top open-source startups by Github stars growth of their repositories. All descriptions below are based on public data and were up-to-date at the end of Q4 2020.
  1. Tailwind Labs (tailwindlabs/headlessui, 3.8K stars, 9368% AGR). The developer of popular UI framework Tailwind CSS. Founded in 2017 in Cambridge, Canada and has no known external funding.
  2. Charm (charmbracelet/glow, 5.8K stars, 4259% AGR). CLI-centric cloud with end-to-end encryption. Founded in 2019 in New York and has no known external funding.
  3. Supabase (supabase/supabase, 4.6K stars, 1373% AGR). RESTful APIs for PostgreSQL without a single line of code (open-source alternative to Firebase). Founded in 2020 in Singapore and raised $6.125M from Coatue, Y Combinator, etc.
  4. Hugging Face (huggingface/datasets, 6K stars, 836% AGR). Developer of the natural language processing library Transformers. Founded in 2016 in Paris and raised $20.2M from Lux Capital, SV Angel, A.Capital, etc.
  5. Project Discovery (projectdiscovery/nuclei, 2.4K stars, 751% AGR). Automated cloud-based reconnaissance and monitoring for IT security. Founded in 2019 in Mumbai and has no known external funding.
  6. Typesense (typesense/typesense, 4.5K stars, 631% AGR). Fast, typo tolerant, fuzzy search engine (open-source alternative to Algolia). Founded in 2016 in Los Angeles and has no known external funding.
  7. Plausible (plausible/analytics, 4.8K stars, 629% AGR). Web analytics (an open-source alternative to Google Analytics). Founded in 2018 in Estonia and has no known external funding.
  8. Earthly Technologies (earthly/earthly, 1.7K stars, 628% AGR). Build automation system allowing to create Docker images, output artefacts or to run tests. Founded in 2020 in San Francisco and raised $2.1M from 468 Capital, Bessemer Venture Partners, Uncorrelated Ventures, etc.
  9. K6 (loadimpact/k6, 11K stars, 389% AGR). Load testing solution for engineering teams. Founded in 2016 in Stockholm and has no known external funding.
  10. Uno Platform (unoplatform/uno, 4.3K stars, 368% AGR). App development platform for C# and WinUI. Founded in 2011 in Montreal and has no known external funding.
  11. Prysmatic Labs (prysmaticlabs/prysm, 1.8K stars, 362% AGR). Ethereum infrastructure developer. Founded in 2018 in New York and raised $2M from Ethereum Foundation, etc
  12. Jina AI (jina-ai/jina, 1.8K stars, 325% AGR). Neural search ecosystem for businesses and developers. Founded in 2020 in Berlin and raised $7.4M from GGV Capital,, Yunqi Partners.
  13. Chatwoot (chatwoot/chatwoot, 6.7K stars, 320% AGR). Live chats for customer support (open-source alternative to Intercom). Founded in 2017 in Bengaluru and has no known external funding.
  14. Starburst (trinodb/trino, 2K stars, 298% AGR). Fast distributed SQL query engine for enterprises (f.k.a. PrestoSQL). Founded in 2017 in Boston and raised $164M from Andreessen Horowitz, Index Ventures, Coatue. [As of Jan 1, 2021 the round with A16Z was not announced, so the company fits ROSS Index criteria]
  15. ORY (ory/kratos, 1.9K stars, 286% AGR). Identity Infrastructure for cloud developers. Founded in 2015 in Munich and has no known external funding.
  16. Bridgecrew (bridgecrewio/checkov, 1.8K stars, 242% AGR). Automated security solution for DevOps. Founded in 2019 in San Francisco and raised $18.1M from Battery Ventures, NFX, etc.
  17. Webiny (webiny/webiny-js, 4.1K stars, 210% AGR). A platform for serverless web applications. Founded in 2018 in London and raised $0.347M from Episode 1.
  18. R2C (returntocorp/semgrep, 2.6K stars, 207% AGR). Fast static code analysis tool for advanced security. Founded in 2017 in San Francisco and raised $13M from Sequoia, Redpoint.
  19. Element (matrix-org/dendrite, 1.5K stars, 202% AGR). Secure self-sovereign chat apps and collaboration solutions. Founded in 2017 in London and raised $18.1M from Firstminute, Notion Capital, Dawn Capital.
  20. Materialize (materializeinc/materialize, 2.1K stars, 197% AGR). Real-time streaming and processing SQL database solution. Founded in 2019 in New York and raised $40.5M from Lightspeed, Kleiner Perkins.


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