kitio.aiUI-TARS Desktop vs Simular
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. UI-TARS Desktop is completely free, while Simular is free trial.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Natural-language computer control
- Screenshot-based understanding
- Local and remote operators
- Agent TARS CLI
- MCP integration
- Cloud computer workspace
- Approval before key actions
- Desktop and web control
- Agent S open-source framework
| Feature | UI-TARS Desktop | Simular |
|---|---|---|
| Best for | ByteDance's open-source desktop agent for controlling your computer | Computer-use agent that works in a secure cloud workspace |
| Category | Agents & automation | Agents & automation |
| Pricing model | Free | Free trial |
| Starting price | Free | $50/mo |
| Free plan | Yes, fully free | No, 7-day trial |
| Made by | ByteDance | Simular |
| Based in | China | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
UI-TARS Desktop is completely free, while Simular is free trial.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Starter
$50/mo
- Cloud Windows computer access
- Generous credits, top up anytime
- Bring your own device
- Community support
Premium
$200/mo
- Always-on Windows or Mac computer
- Higher monthly credit allowance
- Priority support
Pro
$500/mo
- Unlimited usage within fair use
- For teams running Sai continuously
Enterprise
Contact sales
- Managed scaling
- SSO, RBAC, SOC2
- Custom integrations
- SLA guarantees
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
UI-TARS Desktop
- Free and open source
- Runs on your own machine
- Backed by strong UI models
- Experimental and sometimes unreliable
- Needs a capable model endpoint
Simular
- No setup needed
- Approval gates on risky actions
- Strong research background
- Computer-use agents are slower than APIs
- Subscription required after trial
Which one should you choose?
Choose UI-TARS Desktop if you want:
- Free and open source
- Runs on your own machine
- Backed by strong UI models
Watch out: experimental and sometimes unreliable.
Choose Simular if you want:
- No setup needed
- Approval gates on risky actions
- Strong research background
Watch out: computer-use agents are slower than apis.
UI-TARS Desktop vs Simular FAQ
What is the difference between UI-TARS Desktop and Simular?
UI-TARS Desktop: ByteDance's open-source desktop agent for controlling your computer. Simular: Computer-use agent that works in a secure cloud workspace. Both are agents & automation tools.
Is UI-TARS Desktop or Simular cheaper?
UI-TARS Desktop is completely free, while Simular is free trial.
Do UI-TARS Desktop and Simular have free plans?
UI-TARS Desktop: Yes, fully free. Simular: No, 7-day trial.
Who makes UI-TARS Desktop?
UI-TARS Desktop is made by ByteDance, based in China.
Who makes Simular?
Simular is made by Simular, based in United States.
Which should I choose, UI-TARS Desktop or Simular?
Choose UI-TARS Desktop if you value free and open source and runs on your own machine. Choose Simular if you value no setup needed and approval gates on risky actions.