kitio.aiDify 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 $59 for Dify.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Visual workflow editor
- Knowledge base and RAG
- Agent mode with tools
- Model provider management
- App APIs
- Visual agent canvas
- AI copilot for workflows
- API and chat deployment
- Execution logs
- Self-hosting
| Feature | Dify | Sim |
|---|---|---|
| Best for | Open-source platform for building LLM apps, agents and RAG | Open-source workspace for building and running AI agent workflows |
| Category | Agents & automation | Agents & automation |
| Pricing model | Freemium | Freemium |
| Starting price | $59/mo | $25/mo |
| Free plan | Yes | Yes |
| Made by | LangGenius | Sim Studio |
| Based in | – | 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 $59 for Dify.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Sandbox
Free
- Free cloud trial
- Limited message credits
Professional
$59/mo
- Per workspace ($590/yr annually)
- 3 team members
- 50 apps
Team
$159/mo
- Per workspace ($1,590/yr annually)
- 50 team members
- 200 apps
Enterprise
Contact sales
- Scalable deployment
- Multiple workspaces, SSO
- Commercial license
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
Dify
- Very popular open-source project
- Strong RAG features
- Works with many model providers
- Self-hosting takes setup effort
- Free cloud plan is small
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 Dify if you want:
- Very popular open-source project
- Strong RAG features
- Works with many model providers
Watch out: self-hosting takes setup effort.
Choose Sim if you want:
- Open source and self-hostable
- Fast workflow building with copilot
- Developer-friendly
Watch out: younger product with fewer integrations.
Dify vs Sim FAQ
What is the difference between Dify and Sim?
Dify: Open-source platform for building LLM apps, agents and RAG. Sim: Open-source workspace for building and running AI agent workflows. Both are agents & automation tools.
Is Dify or Sim cheaper?
Sim has the lower starting price: about $25 a month, against $59 for Dify.
Do Dify and Sim have free plans?
Dify: Yes. Sim: Yes.
Who makes Dify?
Dify is made by LangGenius.
Who makes Sim?
Sim is made by Sim Studio, based in United States.
Which should I choose, Dify or Sim?
Choose Dify if you value very popular open-source project and strong rag features. Choose Sim if you value open source and self-hostable and fast workflow building with copilot.