Timmy-TUI vs Promptfoo: Which is Better in 2026?
Choosing between Timmy-TUI and Promptfoo comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: Promptfoo wins this matchup. UiPath is our overall AI Agents pick. Lucid Train is our free AI Agents pick. Pick Timmy-TUI if you need developer tools.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Timmy-TUI
Securely record and replay AI agent runs with a local-first flight recorder
Best for you if:
- • You want a fully free tool (Promptfoo requires payment)
- • You want tamper-evident SHA-256 receipts give a verifiable audit trail of all agent actions, file edits, and tool calls
- • You want zero external telemetry: all receipts and logs stay on the local machine
Promptfoo
Build secure AI applications with AI security testing integrated into your development workflow.
Best for you if:
- • You want lLM eval framework
- • You want open source
| At a Glance | Timmy-TUI | |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Developer Tools | Security |
Rating | - | - |
Free plan | Yes | Yes |
Choose Timmy-TUI or Promptfoo?
Choose Timmy-TUI if
Securely record and replay AI agent runs with a local-first flight recorder
- You want a fully free tool (Promptfoo requires payment)
- You want tamper-evident SHA-256 receipts give a verifiable audit trail of all agent actions, file edits, and tool calls
- You want zero external telemetry: all receipts and logs stay on the local machine
- Your work is developer tools-shaped, not security-shaped
Choose Promptfoo if
Build secure AI applications with AI security testing integrated into your development workflow.
- You want lLM eval framework
- You want open source
- Your work is security-shaped, not developer tools-shaped
| Feature | Timmy-TUI | Promptfoo |
|---|---|---|
| Pricing Model | Free | Freemium |
| User Rating | No ratings yet | No ratings yet |
| Categories | Developer ToolsAI Agents | SecurityTesting & QA |
In-Depth Analysis
Timmy-TUI
Securely record and replay AI agent runs with a local-first flight recorder
Timmy-TUI offers a fair pricing structure, especially with its generous Free tier.
Watch out
CI/CD minutes and storage overages
Strengths
- +Tamper-evident SHA-256 receipts give a verifiable audit trail of all agent actions, file edits, and tool calls
- +Zero external telemetry: all receipts and logs stay on the local machine
- +OpenRouter backend means any supported model (leading models, advanced models, etc.) is available without switching tools
- +Multiple install paths (npx, global npm, source clone) lower the barrier to a first run
Weaknesses
- -Very early stage with minimal community adoption and limited production hardening
- -Browser companion requires a separate localhost WebSocket server, adding setup friction
- -Documentation is thin beyond the GitHub README, so advanced configuration relies on reading source code
Key features
Promptfoo
Build secure AI applications with AI security testing integrated into your development workflow.
The pricing for Promptfoo is very generous, especially with a robust free tier offering unlimited local evals and all features.
Watch out
No public overage pricing for Cloud
Strengths
- +LLM eval framework
- +Open source
- +Good for testing prompts
- +Active development
- +Good documentation
Weaknesses
- -Learning curve
- -CLI focused
- -Newer tool
- -Limited features
- -Still maturing
Key features
Pricing: Timmy-TUI vs Promptfoo
| Plan | Timmy-TUI | Promptfoo |
|---|---|---|
| Tier 1 | $0 USD per month Free | Free Free |
| Tier 2 | $4 USD per user/month Team | $50 month Cloud |
| Tier 3 | Starting at $21 USD per user/month Enterprise | custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Timmy-TUI pricing and Promptfoo pricing.
Who Should Use What?
On a budget?
Timmy-TUI is free. Promptfoo is freemium.
Go with: Timmy-TUI
Want the highest-rated option?
Neither has ratings yet.
Too early to call on ratings — compare on features and pricing.
Value user reviews?
Neither has ratings yet.
Too early to call — neither has ratings yet.
3 Questions to Help You Decide
What's your budget?
Timmy-TUI is free. Promptfoo is freemium. Go with Timmy-TUI if free matters most.
What's your use case?
Timmy-TUI is a developer tools tool. Promptfoo is in security. Pick the category that matches your needs.
How important are ratings?
Neither has ratings yet.
Key Takeaways
Promptfoo
- Free tier available
- Our pick for this comparison
Timmy-TUI
- Completely free
- Better fit for developer tools
The Bottom Line
Promptfoo wins this matchup. UiPath is our overall AI Agents pick. Lucid Train is our free AI Agents pick. That said, Timmy-TUI is free, hard to beat on price.
Frequently Asked Questions
Is Timmy-TUI or Promptfoo better?
Promptfoo is rated in our evaluation. Timmy-TUI is free and Promptfoo is freemium.
What are Timmy-TUI and Promptfoo used for?
Timmy-TUI: Securely record and replay AI agent runs with a local-first flight recorder. Promptfoo: Build secure AI applications with AI security testing integrated into your development workflow..
What does Timmy-TUI cost vs Promptfoo?
Timmy-TUI is completely free. Promptfoo is freemium (free tier + paid plans). Visit their websites for detailed pricing.