Sim
Automation
Sim
Open-source AI agent workspace you can self-host for free
What it is
Sim is an open-source AI workspace for building, testing, and deploying AI agent workflows on a visual canvas. It connects to 1,000+ integrations and every major LLM provider, and the entire platform can be self-hosted for free under an Apache 2.0 license instead of requiring a subscription from day one.
- Price
- $25
- free tier available
- Free tier
- Yes
- no card required
- Rating
- ★ null
- 0 reviews
- Platforms
- 4
- Web · Linux
What you get free vs paid
Verdict
Pros
- Fully open source and free to self-host, with no vendor lock-in
- Visual canvas keeps multi-step workflow logic easy to follow
- Copilot generates and fixes workflow nodes from plain-language instructions
- Supports local models through Ollama for fully offline setups
Cons
- Integration library and template count are smaller than mature competitors like n8n or Latenode
- Self-hosting requires comfort with Docker, Bun, and PostgreSQL if you skip the cloud plan
- Younger company, so long-term roadmap depth is less proven than incumbents
A genuinely good pick if you want a free, self-hostable AI agent builder and don't mind a smaller integration library than the big incumbents.
Capabilities
Core features
- Visual AI agent workflow canvas
- Copilot node generation from natural language
- 1,000+ third-party integrations
- Support for every major LLM provider
- Local model support via Ollama
- Self-hosted or cloud deployment
- Realtime execution and debug view
- Built-in vector store for document Q&A
All platforms
AI stacks & blueprints
Best Free AI Tools
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Common questions
Is Sim free?
Sim offers a free tier you can use without paying. Browse QuestLoops for verified ways to get more out of it for free.
How much does Sim cost?
Sim's paid plans start at about $25 per month. There's also a free tier for lighter use. Pricing changes over time — QuestLoops focuses on legitimate ways to reduce or avoid that cost.
What is Sim used for?
Open-source AI agent workspace you can self-host for free It falls under the Automation category.
What are the best alternatives to Sim?
You can compare Sim side-by-side with similar Automation on QuestLoops to weigh free-tier limits, pricing, and tradeoffs before deciding.
Community workarounds
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