Sim – Apache-2.0 n8n alternative

In plain words

Sim is an open-source visual editor for building agentic workflows, available under Apache-2.0 license. It provides a drag-and-drop canvas interface with 138 pre-built blocks for integrations like Slack, GitHub, Linear, and various databases. Designed for developers who need granular control and visibility into agent execution, Sim runs locally via Docker with no execution limits, addressing production debugging challenges that code-first frameworks and traditional workflow platforms struggle with.

written from the facts on this page · September 2026

From the sources

Sim Studio lets you connect LLMs to Slack, Supabase, Pinecone, and Gmail to create research agents, support bots, or file parsers. Collaborate by inviting your team to your visual canvas.

Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders. - simstudioai/sim

In the maker’s words, at launch

Hey HN, Waleed here. We're building Sim (https://sim.ai/), an open-source visual editor to build agentic workflows. Repo here: https://github.com/simstudioai/sim/. Docs here: https://docs.sim.ai. You can run Sim locally using Docker, with no execution limits or other…

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