kitio.aiPromptfoo vs Remyx
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Promptfoo starts at See pricing page and Remyx starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Config-based test cases
- Model comparison
- Red-team scans
- CI integration
- Web results viewer
- PR-based evaluations
- Research-driven draft PRs
- Cost reports per run
- Decision history
- CLI, API and MCP server
| Feature | Promptfoo | Remyx |
|---|---|---|
| Best for | Open-source CLI for testing prompts and red-teaming AI apps | Tests proposed changes to AI systems and reports results on the PR |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | OpenAI | Remyx AI |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Promptfoo starts at See pricing page and Remyx starts at See pricing page. Check both pricing pages for current plans.
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
2 plans
Outrider
Free
- Open-source GitHub Action
- Daily paper digest
- Draft PRs for review
Validate
Credit top-ups from $10
- First validation free
- Pay for compute and model calls
- Receipt on each PR
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
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
Remyx
- First validation free per installation
- Outrider is open source and free
- Works on PRs however they were written
- Compute and model calls are billed as usage
- Outrider needs your own model API key
- Aimed at ML teams, not general users
Which one should you choose?
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.
Choose Remyx if you want:
- First validation free per installation
- Outrider is open source and free
- Works on PRs however they were written
Watch out: compute and model calls are billed as usage.
Promptfoo vs Remyx FAQ
What is the difference between Promptfoo and Remyx?
Promptfoo: Open-source CLI for testing prompts and red-teaming AI apps. Remyx: Tests proposed changes to AI systems and reports results on the PR. Both are models & apis tools.
Is Promptfoo or Remyx cheaper?
Promptfoo starts at See pricing page and Remyx starts at See pricing page. Check both pricing pages for current plans.
Do Promptfoo and Remyx have free plans?
Promptfoo: Yes. Remyx: Yes.
Who makes Promptfoo?
Promptfoo is made by OpenAI, based in United States.
Who makes Remyx?
Remyx is made by Remyx AI.
Which should I choose, Promptfoo or Remyx?
Choose Promptfoo if you value free and works with any provider and strong security testing. Choose Remyx if you value first validation free per installation and outrider is open source and free.