Top trending open-source startups in 2025

Annual ROSS Index featuring top open-source startups ranked by the highest growth rates across any 90-day observation window in 2025. Each entry includes the quarter of peak performance, growth multiplier, and star count as of December 31, 2025. All descriptions below are based on publicly available data and were accurate as of the end of 2025.
  1. 🇺🇸 Union Labs (unionlabs/union, 74.3K stars, 54.2x growth) is a modular zero-knowledge interoperability layer linking blockchains. Founded in 2023 in Dover, DE. Raised $16M from Semantic, Tioga, Galileo, Nascent, LongHash, gCC, etc.
  2. OpenCut (OpenCut-app/OpenCut, 43.9K stars, 32.0x growth) is a cross-platform video editor. Founded in 2025.
  3. 🇨🇭 Anoma (anoma/anoma, 34.2K stars, 27.2x growth) is a distributed operating system for intent-centric, decentralized applications. Founded in 2020 in Zug, Switzerland. Raised $65M from Electric, Polychain, CMCC Global, etc.
  4. 🇺🇸 Browser Use (browser-use/browser-use, 74.2K stars, 24.0x growth) is a framework that enables AI agents to seamlessly interact and control web browsers. Founded in 2024 in San Francisco. Raised $17.5M from Y Combinator, Nexus, Felicis, etc.
  5. 🇺🇸 SST (anomalyco/opencode, 44.6K stars, 22.1x growth) built full-stack deployment framework. Now developing OpenCode, a terminal-based AI coding agent. Founded in 2017 in San Francisco. Raised $1.62M from Y Combinator, SV Angel, Greylock, etc.
  6. 🇺🇸 Firecrawl (firecrawl/open-lovable, 23.1K stars, 21.6x growth) develops web data API for AI. Recently released Open Lovable app that recreates any website. Founded in 2022 in San Francisco. Raised $17.6M from Agent, Nexus, Zapier and Y Combinator.
  7. 🇺🇸 Upstash (upstash/context7, 40.6K stars, 20.9x growth) built serverless data platform. Now developing Context7, an MCP server with up-to-date code documentation AI agents. Founded in 2021 in San Jose, CA. Raised $11.9M from Bek, AngelList, Prototype, ScaleX, Andreessen Horowitz, Mango, etc.
  8. 🇺🇸 Coze (coze-dev/coze-studio, 19.2K stars, 18.1x growth) develops Coze Studio, an AI agent development platform with visual tools. Founded in 2023 in Mountain View, CA. Raised $75M.
  9. 🇺🇸 Hamster (eyaltoledano/claude-task-master, 24.5K stars, 17.4x growth) builds TaskMaster AI that transforms specs into AI-compatible tasks that integrate directly into your AI dev tools. Founded in 2025 in San Francisco.
  10. 🇺🇸 Strix (usestrix/strix, 18.4K stars, 17.1x growth) runs autonomous AI agents for penetration testing. Founded in 2024 in San Francisco. Raised an undisclosed amount from Vercel.
  11. 🇺🇸 Winfunc (winfunc/opcode, 19.6K stars, 16.6x growth) builds Asterisk, a codebase vulnerability automation system, and Opcode, a cross-platform client for Claude Code. Founded in 2024 in San Francisco. Raised $0.5M from Multimodal, Orange Collective, Pioneer, Y Combinator.
  12. 🇺🇸 Million (aidenybai/react-scan, 20.0K stars, 14.7x growth) develops React Scan, a tool for optimizing React code by identifying performance bottlenecks. Founded in 2023 in San Francisco. Raised $14.1M from Y Combinator, Costanoa, Hawk Hill, Phosphor.
  13. 🇺🇸 Linera (linera-io/linera-protocol, 31.4K stars, 14.6x growth) develops a blockchain protocol for highly scalable, low-latency Web3 applications. Founded in 2021 in San Francisco. Raised $12M from Andreessen Horowitz, Borderless, Tribe, etc.
  14. 🇺🇸 elizaOS (elizaOS/eliza, 17.1K stars, 14.4x growth) is a comprehensive framework for building AI agents with persistent personalities. Founded in 2024 in San Francisco.
  15. 🇺🇸 Charm (charmbracelet/crush, 16.6K stars, 14.3x growth) develops Crush, a terminal-based AI coding agent. Founded in 2019 in New York. Raised $9.9M from Fuel, NAP, Firestreak, Betaworks, Gradient, etc.
  16. 🇺🇸 Dyad (dyad-sh/dyad, 18.8K stars, 14.0x growth) is an AI app builder that lets you craft full-stack interfaces from your machine. Founded in 2025 in San Jose, CA.
  17. 🇮🇳 RagaAI (raga-ai-hub/RagaAI-Catalyst, 16.0K stars, 13.5x growth) offers Catalyst, a GenAI management and optimization platform. Founded in 2021 in India. Raised $4.7M from Pravega, Pi, Arka Labs, TenOneTen, Exfinity, Anorak, Mana.
  18. 🇸🇬 Mindverse (mindverse/Second-Me, 14.8K stars, 12.8x growth) develops SecondMe, a locally run AI doppelganger that keeps all your data private. Founded in 2022 in Singapore. Raised $29.9M from Square Peg, Hongshan, K2VC, Linear, Plug and Play Tech Center, HSG.
  19. 🇰🇷 Nari Labs (nari-labs/dia, 17.5K stars, 12.0x growth) develops advanced TTS models capable of generating ultra-realistic, expressive speech from text. Founded in 2025 in Seoul.
  20. 🇨🇳 Cherry Studio (CherryHQ/cherry-studio, 37.0K stars, 11.5x growth) is a desktop chat app that supports multiple LLM providers. Founded in 2021 in Shanghai, China.

Anyone with a featuring on Annual ROSS Index 2025 can add the badge to their own website to let site visitors know they are one of the fastest-growing open-source startups.

Visit ROSS Index to see the recent top open-source startups.