🤖Sim Studio
Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.
⭐ Very popular: 29k stars, gaining about 56 a week
View on GitHub ↗repo profile
momentum
durability
bus factor = how many people it takes to cover more than half the commits (6 months). 1 is a solo project; higher means the work is spread across a team. top-author share is the single busiest author's slice of those commits.
since we covered it
why it's a big deal
- Gives teams one workspace to build, deploy, and monitor AI agents instead of stitching together separate tools for editing, scheduling, and logging.
- Ships connectors to Slack, Notion, HubSpot, Salesforce, and databases plus support for every major LLM, so agents can act across systems a business already uses.
- Can be self-hosted via a single Docker Compose command and run against local models through Ollama or vLLM, which keeps data and inference in-house for teams that cannot use a managed cloud.
under the hood
- Built as a Turborepo monorepo on Next.js with the Bun runtime, PostgreSQL with pgvector and Drizzle ORM, Better Auth, and Zod validation.
- Uses ReactFlow for the visual workflow editor, Socket.io for realtime updates, Zustand and TanStack Query for state, and Shadcn plus Tailwind for the UI.
- Runs agent code in isolation using E2B for remote execution and isolated-vm for sandboxing, with Trigger.dev handling background and scheduled jobs.
Radar summary, generated from the project's public sources
star history
- PR#13 5k 2025-07-23
- now 29k + 24k since first covered
curve is sampled from GitHub's star history, plus our own daily readings since we covered it; the dashed stretch is before we first covered it, the solid line since. figures at coverage are the numbers we printed then (approx.), current count is live.
understory
Deep in the understory, shipping hard, still flying under the radar.
- output, commits & releases
- clout, star velocity
output = commits & releases; clout = star velocity, both 0 to 100 monthly indices; the gap where output runs above clout is the understory. The understory →
covered in
-
Visual AI Agent Workflow Builder
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