kitio.aiLangflow vs Sim
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Langflow is completely free, while Sim is freemium.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Drag-and-drop flow canvas
- Editable Python components
- MCP server support
- Desktop app
- API serving
- Visual agent canvas
- AI copilot for workflows
- API and chat deployment
- Execution logs
- Self-hosting
| Feature | Langflow | Sim |
|---|---|---|
| Best for | Open-source visual builder for agents and RAG pipelines | Open-source workspace for building and running AI agent workflows |
| Category | Agents & automation | Agents & automation |
| Pricing model | Free | Freemium |
| Starting price | Free | $25/mo |
| Free plan | Yes, fully free | Yes |
| Made by | IBM (DataStax) | Sim Studio |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Langflow is completely free, while Sim is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 1,000 one-time credits
- 1 workspace
Pro
$25/mo
- Per user
- 6,000 credits / month + 2,000/week
- 3 workspaces, invite teammates
- 50 concurrent executions
Max
$100/mo
- 25,000 credits / month + 4,000/week
- Unlimited workspaces
- 200 concurrent executions
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Langflow
- Free and open source
- Components are fully editable
- Good for fast prototypes
- Production hosting is up to you
- Canvas gets messy for big flows
Sim
- Open source and self-hostable
- Fast workflow building with copilot
- Developer-friendly
- Younger product with fewer integrations
- Requires some technical knowledge
Which one should you choose?
Choose Langflow if you want:
- Free and open source
- Components are fully editable
- Good for fast prototypes
Watch out: production hosting is up to you.
Choose Sim if you want:
- Open source and self-hostable
- Fast workflow building with copilot
- Developer-friendly
Watch out: younger product with fewer integrations.
Langflow vs Sim FAQ
What is the difference between Langflow and Sim?
Langflow: Open-source visual builder for agents and RAG pipelines. Sim: Open-source workspace for building and running AI agent workflows. Both are agents & automation tools.
Is Langflow or Sim cheaper?
Langflow is completely free, while Sim is freemium.
Do Langflow and Sim have free plans?
Langflow: Yes, fully free. Sim: Yes.
Who makes Langflow?
Langflow is made by IBM (DataStax), based in United States.
Who makes Sim?
Sim is made by Sim Studio, based in United States.
Which should I choose, Langflow or Sim?
Choose Langflow if you value free and open source and components are fully editable. Choose Sim if you value open source and self-hostable and fast workflow building with copilot.