kitio.aiLangGraph vs Sim
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Sim has the lower starting price: about $25 a month, against $39 for LangGraph.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Graph-based agent design
- Persistent state
- Human-in-the-loop
- Streaming
- Python and JavaScript
- Visual agent canvas
- AI copilot for workflows
- API and chat deployment
- Execution logs
- Self-hosting
| Feature | LangGraph | Sim |
|---|---|---|
| Best for | Low-level framework for building stateful, controllable agents | Open-source workspace for building and running AI agent workflows |
| Category | Agents & automation | Agents & automation |
| Pricing model | Freemium | Freemium |
| Starting price | $39/mo | $25/mo |
| Free plan | Yes | Yes |
| Made by | LangChain | Sim Studio |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Sim has the lower starting price: about $25 a month, against $39 for LangGraph.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Developer
Free
- 1 seat
- 5k base traces / month, then pay as you go
- Community support
Plus
$39/mo
- Per seat
- 10k base traces / month, then pay as you go
- Access to Deployment and Engine
- Unlimited seats
Enterprise
Custom
- Self-hosted and hybrid deployment
- Custom SSO, ABAC and RBAC
- Support SLA
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
LangGraph
- Fine control over agent behavior
- Strong persistence model
- Widely used in production
- Steeper learning curve
- More code than no-code builders
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 LangGraph if you want:
- Fine control over agent behavior
- Strong persistence model
- Widely used in production
Watch out: steeper learning curve.
Choose Sim if you want:
- Open source and self-hostable
- Fast workflow building with copilot
- Developer-friendly
Watch out: younger product with fewer integrations.
LangGraph vs Sim FAQ
What is the difference between LangGraph and Sim?
LangGraph: Low-level framework for building stateful, controllable agents. Sim: Open-source workspace for building and running AI agent workflows. Both are agents & automation tools.
Is LangGraph or Sim cheaper?
Sim has the lower starting price: about $25 a month, against $39 for LangGraph.
Do LangGraph and Sim have free plans?
LangGraph: Yes. Sim: Yes.
Who makes LangGraph?
LangGraph is made by LangChain, based in United States.
Who makes Sim?
Sim is made by Sim Studio, based in United States.
Which should I choose, LangGraph or Sim?
Choose LangGraph if you value fine control over agent behavior and strong persistence model. Choose Sim if you value open source and self-hostable and fast workflow building with copilot.