Top trending open-source startups in Q2 2026

Snapshot of ROSS Index featuring top open-source startups by GitHub stars growth of their repositories. All descriptions are based on public data and were current as of the end of Q2 2026
  1. 🇺🇸 Nous Research (NousResearch/hermes-agent, 205.7K stars, 171.6x growth) is an AI lab developing Hermes, a personal AI agent with persistent memory. Founded in 2023 in Austin, TX. Raised $70M from Paradigm, Robot, North Island, Distributed Global, Delphi, OSS, etc.
  2. 🇺🇸 ECC Tools (affaan-m/ECC, 223.5K stars, 159.7x growth) is a library of skills, memory tools, and security scanning for AI coding agents. Founded in 2026 in San Francisco.
  3. 🇺🇸 Graphify (safishamsi/graphify, 74.4K stars, 74.4x growth) turns codebases, docs, and diagrams into queryable knowledge graphs for AI coding assistants. Founded in 2025 in San Francisco. Raised $0.5M from Y Combinator.
  4. 🇨🇳 Nexu (nexu-io/open-design, 72.9K stars, 72.9x growth) builds Open Design, a desktop AI agent that prototypes websites, mobile apps, and slides. Founded in 2024 in China. Raised an undisclosed amount from MindWorks.
  5. 🇺🇸 EgonexAI (Egonex-AI/Understand-Anything, 69.2K stars, 61.6x growth) builds Understand Anything, a plugin that maps a codebase into a visual knowledge graph. Founded in 2026 in Dover, DE.
  6. 🇦🇪 World Monitor (koala73/worldmonitor, 60.9K stars, 54.0x growth) is a real-time dashboard that aggregates news and geopolitical events with AI. Founded in 2026 in Abu Dhabi.
  7. 🇺🇸 Headroom (headroomlabs-ai/headroom, 53.9K stars, 53.1x growth) compresses tool outputs, logs, and RAG data to cut LLM token costs. Founded in 2026 in Fremont, CA.
  8. 🇫🇷 rtk (rtk-ai/rtk, 67.0K stars, 50.9x growth) is a CLI proxy that reduces LLM token consumption on common dev commands. Founded in 2026 in Lyon.
  9. 🇭🇰 Multica (multica-ai/multica, 38.5K stars, 38.5x growth) is a platform for assigning tasks to AI coding agents and tracking their progress. Founded in 2026 in Hong Kong.
  10. 🇺🇸 TinyHumans (tinyhumansai/openhuman, 33.9K stars, 33.9x growth) builds OpenHuman, a local-first desktop AI agent with persistent memory across 100+ connected services. Founded in 2025 in San Francisco.
  11. 🇺🇸 HeyGen (heygen-com/hyperframes, 32.2K stars, 32.2x growth) is an AI avatar video platform and the creator of HyperFrames, an HTML-to-video rendering engine for agents. Founded in 2020 in Los Angeles. Raised $69M from Benchmark, Conviction, Thrive, Bond, SV Angel, etc.
  12. 🇺🇸 ZeroClaw Labs (zeroclaw-labs/zeroclaw, 32.1K stars, 31.3x growth) is a private AI personal assistant that runs on-device and connects to 20+ messaging apps. Founded in 2026 in Cambridge, MA.
  13. 🇺🇸 Earendil Works (earendil-works/pi, 66.5K stars, 30.7x growth) builds Pi, the coding agent powering OpenClaw. Founded in 2025 in the United States.
  14. 🇦🇺 Gitlawb (Gitlawb/openclaude, 29.5K stars, 29.5x growth) is a decentralized code collaboration network and the developer of OpenClaude, a terminal coding agent. Founded in 2026 in Australia.
  15. 🇮🇱 NanoCo (nanocoai/nanoclaw, 30.0K stars, 28.5x growth) builds NanoClaw, a lightweight personal AI agent running in containers, connecting to messaging apps. Founded in 2026 in Tel Aviv. Raised $12M from Valley, Docker, Vercel, MondayCom, Slow, Clutch, Factorial, etc.
  16. CloakHQ (CloakHQ/CloakBrowser, 27.4K stars, 27.1x growth) builds CloakBrowser, a stealth Chromium fork that lets scrapers and browser agents bypass bot detection. Founded in 2026.
  17. 🇨🇦 Voicebox (jamiepine/voicebox, 35.9K stars, 24.8x growth) is a local-first AI voice studio for voice cloning, dictation, and text-to-speech. Founded in 2026 in Vancouver.
  18. 🇯🇴 RightNow (RightNow-AI/openfang, 17.9K stars, 17.7x growth) is an AI dev-tools startup building OpenFang, a platform that runs AI agents on schedules and connects them to messaging apps. Founded in 2025 in Amman. Raised $0.54M from Y Combinator, Maza Ventures.
  19. 🇺🇸 Manaflow (manaflow-ai/cmux, 23.2K stars, 17.6x growth) develops cmux, a macOS terminal for running and managing fleets of AI coding agents. Founded in 2024 in San Francisco. Raised $0.5M from Y Combinator.
  20. 🇺🇸 Pascal (pascalorg/editor, 17.1K stars, 16.9x growth) turns buildings into 3D digital twins via iPhone scans, with a browser editor and AI agents that work in the model. Founded in 2025 in Tampa. Raised an undisclosed amount from South Park Commons.

    21. Anyone with a featuring on ROSS Index Q2 2026 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 top-20 open-source startups in other quarters.