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 Q1 2026
🇺🇸 ECC Tools (affaan-m/everything-claude-code, 119.8K stars, 119.8x growth) is an agent harness system with skills, agents, and security scanning. Founded in 2026 in San Francisco.
🇦🇪 World Monitor (koala73/worldmonitor, 45.5K stars, 45.5x growth) is a real-time global intelligence dashboard with AI-powered news aggregation and geopolitical monitoring. Founded in 2026 in Abu Dhabi.
🇨🇦 Cognitum (ruvnet/RuView, 44.7K stars, 41.3x growth) builds RuView, a WiFi DensePose system that turns commodity WiFi signals into real-time human pose estimation without video. Founded in 2026 in Toronto.
🇺🇸 Keygraph (KeygraphHQ/shannon, 34.9K stars, 33.5x growth) builds Shannon, an autonomous AI pentester for web apps and APIs. Founded in 2024 in San Francisco. Raised an undisclosed amount from Depth, Urban Innovation.
🇺🇸 Composio (ComposioHQ/awesome-claude-skills, 49.5K stars, 32.7x growth) builds tools for AI agents; published awesome-claude-skills, a curated Claude Skills collection. Founded in 2023 in San Francisco. Raised $29M from Lightspeed, Elevation, Together, SV Angel, Blitzscaling, Operator.
🇺🇸 ZeroClaw Labs (zeroclaw-labs/zeroclaw, 29.1K stars, 29.1x growth) is a private AI personal assistant that runs on-device and connects to 20+ messaging apps. Founded in 2026 in Cambridge, MA.
🇮🇱 NanoCo (qwibitai/nanoclaw, 26.0K stars, 26.0x growth) builds NanoClaw, a lightweight personal AI agent running in containers, connecting to messaging apps. Founded in 2026 in Tel Aviv.
🇦🇺 OpenSpec (Fission-AI/OpenSpec, 35.7K stars, 18.5x growth) is a spec-driven development framework for AI coding assistants. Founded in 2025 in Sydney. Raised an undisclosed amount from Y Combinator.
🇫🇷 rtk (rtk-ai/rtk, 15.7K stars, 15.7x growth) is a CLI proxy that reduces LLM token consumption on common dev commands. Founded in 2026 in Lyon.
🇦🇪 VXControl (vxcontrol/pentagi, 13.9K stars, 13.9x growth) builds PentAGI, a fully autonomous AI agent system for complex penetration testing tasks. Founded in 2018 in Dubai.
🇳🇴 Aperant (AndyMik90/Aperant, 13.6K stars, 13.5x growth) is an autonomous multi-session AI coding platform (formerly Auto Claude). Founded in 2025 in Skiptvet.
🇺🇸 Gas Town (gastownhall/gastown, 13.3K stars, 13.3x growth) is a multi-agent workspace manager for AI coding agents. Also builds Beads – persistent, structured memory for coding agents. Founded in 2025 in Kirkland.
🇺🇸 OpenWork (different-ai/openwork, 12.8K stars, 12.8x growth) is an open-source alternative to Claude Cowork built for teams. Founded in 2025 in San Francisco. Raised an undisclosed amount from Y Combinator.
🇺🇸 Tambo (tambo-ai/tambo, 11.1K stars, 11.1x growth) is a generative UI SDK for React. Founded in 2024 in Seattle.
🇨🇳 waoo (saturndec/waoowaoo, 10.6K stars, 10.6x growth) is an AI-powered filmmaking workflow tool for content creators. Founded in 2026 in Shanghai.
🇺🇸 Strix (usestrix/strix, 22.8K stars, 10.3x growth) is an open-source AI security platform that finds and fixes app vulnerabilities. Founded in 2025 in San Francisco. Raised an undisclosed amount from Vercel.
🇸🇬 NoFX (NoFxAiOS/nofx, 11.5K stars, 10.2x growth) builds VergeX, an agentic AI trading operating system for autonomous market execution. Founded in 2025 in Singapore.
🇮🇱 Accomplish (accomplish-ai/accomplish, 10.0K stars, 10.0x growth) is an open-source AI desktop agent for file management, document creation, and browser automation. Founded in 2026 in Tel Aviv.
🇺🇸 Aden (aden-hive/hive, 10.0K stars, 10.0x growth) builds Hive, a runtime harness for production AI agents with failure recovery, self-evolving workflows, and built-in observability. Founded in 2018 in San Francisco. Raised $3.4M from Y Combinator, Magic.
Anyone with a featuring on ROSS Index Q1 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.