kitio.aiLLM vs Promptfoo
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. LLM is completely free, while Promptfoo is freemium.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Prompts from the terminal
- SQLite logging
- Embeddings
- Tool calling
- Plugin system
- Structured extraction
- Config-based test cases
- Model comparison
- Red-team scans
- CI integration
- Web results viewer
| Feature | LLM | Promptfoo |
|---|---|---|
| Best for | Command-line tool and Python library for working with any LLM | Open-source CLI for testing prompts and red-teaming AI apps |
| Category | Models & APIs | Models & APIs |
| Pricing model | Free | Freemium |
| Starting price | Free | See pricing page |
| Free plan | Yes, fully free | Yes |
| Made by | Simon Willison | OpenAI |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
LLM is completely free, while Promptfoo is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
2 plans
Community
Free
- Open source
- All LLM evaluation features
- Red teaming (10k probes/month)
- Run locally or self-host
Enterprise
Contact sales
- Reports and continuous monitoring
- Issue tracking and remediation
- Dedicated runner
- Assigned deployment engineer
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
LLM
- Works with hosted and local models
- Keeps a searchable log of every prompt
- Large plugin ecosystem
- Command line only, no GUI
- Hosted models need your own API keys
- Some features depend on plugins
Promptfoo
- Free and works with any provider
- Strong security testing
- Fits developer workflows
- Owned by a model vendor now
- CLI-first may not suit everyone
- Enterprise pricing not public
Which one should you choose?
Choose LLM if you want:
- Works with hosted and local models
- Keeps a searchable log of every prompt
- Large plugin ecosystem
Watch out: command line only, no gui.
Choose Promptfoo if you want:
- Free and works with any provider
- Strong security testing
- Fits developer workflows
Watch out: owned by a model vendor now.
LLM vs Promptfoo FAQ
What is the difference between LLM and Promptfoo?
LLM: Command-line tool and Python library for working with any LLM. Promptfoo: Open-source CLI for testing prompts and red-teaming AI apps. Both are models & apis tools.
Is LLM or Promptfoo cheaper?
LLM is completely free, while Promptfoo is freemium.
Do LLM and Promptfoo have free plans?
LLM: Yes, fully free. Promptfoo: Yes.
Who makes LLM?
LLM is made by Simon Willison, based in United States.
Who makes Promptfoo?
Promptfoo is made by OpenAI, based in United States.
Which should I choose, LLM or Promptfoo?
Choose LLM if you value works with hosted and local models and keeps a searchable log of every prompt. Choose Promptfoo if you value free and works with any provider and strong security testing.