Comparison
prompt-optimizer vs promptfoo
Verdict
Pick prompt-optimizer if prompt-optimizer is a TypeScript-based tool for enhancing AI prompts to achieve better AI-generated outcomes. It supports deployment via Vercel and Cloudflare, and can be installed as a Chrome extension; pick promptfoo if promptfoo is a TypeScript-based tool for evaluating and testing prompts, AI agents, and retrieval-augmented generation systems. It supports red teaming and vulnerability scanning for AI.
Markdown twin · prompt-optimizer alternatives · promptfoo alternatives
GraphCanon updated Sep 20, 2026
19views this month
vs
Trust & integrity
| Signal | prompt-optimizer | promptfoo |
|---|---|---|
| Maintenance | Active (7d since push) As of Sep 18, 2026 · github_public_v1 | Very active (0d since push) As of Sep 18, 2026 · github_public_v1 |
| Provenance | Not a fork · Personal account As of Sep 18, 2026 · github_public_v1 | Not a fork · Organization account As of Sep 18, 2026 · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of Sep 18, 2026 · osv@v1 | No lockfile (source not queried) As of Sep 18, 2026 · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- prompt-optimizer
- An AI prompt optimizer for writing better prompts and getting better AI results.
- promptfoo
- Test prompts, agents, and RAGs. Compare performance of various LLMs.
Stars
- prompt-optimizer
- 35k
- promptfoo
- 25k
Forks
- prompt-optimizer
- 4.1k
- promptfoo
- 2.3k
Open issues
- prompt-optimizer
- 8
- promptfoo
- 631
Language
- prompt-optimizer
- TypeScript
- promptfoo
- TypeScript
Adopt for
- prompt-optimizer
- prompt-optimizer is a TypeScript-based tool for enhancing AI prompts to achieve better AI-generated outcomes. It supports deployment via Vercel and Cloudflare, and can be installed as a Chrome extension.
- promptfoo
- Promptfoo is a TypeScript-based tool for evaluating and testing prompts, AI agents, and retrieval-augmented generation systems. It supports red teaming and vulnerability scanning for AI models, with CI/CD integration.
Persona
- prompt-optimizer
- -
- promptfoo
- -
Runtime
- prompt-optimizer
- -
- promptfoo
- -
License
- prompt-optimizer
- Licensed under AGPL-3.0, allowing free use, modification, and commercialization, but requiring the sharing of source code if the software is distributed or offered as a network service.
- promptfoo
- MIT
Last pushed
- prompt-optimizer
- Sep 11, 2026
- promptfoo
- Sep 18, 2026
Categories
- prompt-optimizer
- Developer Tools, LLM Frameworks
- promptfoo
- Evaluation & Observability
Trust and health
Maintenance
- prompt-optimizer
- Active (82%)
- promptfoo
- Very active (96%)
Days since push
- prompt-optimizer
- 7d
- promptfoo
- 0d
Open issues (now)
- prompt-optimizer
- 8
- promptfoo
- 631
Stars delta
- prompt-optimizer
- +1.8k (30d)
- promptfoo
- +1.4k (30d)
Open issues delta
- prompt-optimizer
- +1 (30d)
- promptfoo
- +150 (30d)
Owner type
- prompt-optimizer
- User
- promptfoo
- Organization
Full report
- prompt-optimizer
- Trust report
- promptfoo
- Trust report
Typed relationship
prompt-optimizer alternative promptfooBoth Prompt Optimizer and promptfoo are tools focused on evaluating and enhancing the effectiveness of prompts used with LLMs, albeit through different methodologies.
Choose prompt-optimizer if…
- License: prompt-optimizer is Other, promptfoo is MIT.
- Pricing: Free to use and modify, but commercial use requires sharing the source code..
- Requirements: Min 1 GB RAM; Requires Docker; Requires setting up environment variables for access control and optional API keys.; Supports deployment via Vercel and Cloudflare, and can be installed as a Chrome extension..
- Both Prompt Optimizer and promptfoo are tools focused on evaluating and enhancing the effectiveness of prompts used with LLMs, albeit through different methodologies.
- Tags unique to prompt-optimizer: ai-prompts, ai-tools, llm, prompt-engineering.
- Also covers Developer Tools, LLM Frameworks.
- When you need to improve the quality of AI-generated content by refining your prompts, especially if you are working with TypeScript and prefer deployment options like Vercel or Cloudflare.
When NOT to use prompt-optimizer
- If you are looking for a tool that does not require setting up environment variables for access control or API keys, as prompt-optimizer mandates configuring `ACCESS_PASSWORD` and optionally `VITE_*`.
- When you need a tool that is not licensed under AGPL-3.0, which requires sharing source code if you offer network services or distribute software.
Choose promptfoo if…
- License: promptfoo is MIT, prompt-optimizer is Other.
- Requirements: Requires Node.js >=22.22.0, with Node.js 24 LTS recommended.; API keys for most LLM providers are required and should be set as environment variables..
- Both Prompt Optimizer and promptfoo are tools focused on evaluating and enhancing the effectiveness of prompts used with LLMs, albeit through different methodologies.
- Tags unique to promptfoo: ci, ci-cd, cicd, evaluation.
- Also covers Evaluation & Observability.
- When you need to compare the performance of various LLMs such as GPT, Claude, Gemini, DeepSeek, and more.
When NOT to use promptfoo
- If you are working with languages other than TypeScript, as Promptfoo is specifically designed for TypeScript environments.
- When you do not need to compare multiple LLMs and only require a simple prompt testing tool without advanced features like red teaming.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (linshenkx/prompt-optimizer) · observed Sep 20, 2026
- GitHub forks (linshenkx/prompt-optimizer) · observed Sep 20, 2026
- Last push (linshenkx/prompt-optimizer) · observed Sep 11, 2026
- License file (Other) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Sep 18, 2026
- Trust scan (lockfile / OSV) · observed Sep 18, 2026
- GitHub stars (promptfoo/promptfoo) · observed Sep 20, 2026
- GitHub forks (promptfoo/promptfoo) · observed Sep 20, 2026
- Last push (promptfoo/promptfoo) · observed Sep 18, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Sep 18, 2026
- Trust scan (lockfile / OSV) · observed Sep 18, 2026
GitHub stars on cards: prompt-optimizer 35k · promptfoo 25k (synced Sep 20, 2026).
Common questions
- What is the difference between prompt-optimizer and promptfoo?
- prompt-optimizer: An AI prompt optimizer for writing better prompts and getting better AI results.. promptfoo: Test prompts, agents, and RAGs. Compare performance of various LLMs.. See the comparison table for live GitHub stats and shared categories.
- When should I choose prompt-optimizer over promptfoo?
- Choose prompt-optimizer over promptfoo when License: prompt-optimizer is Other, promptfoo is MIT; Pricing: Free to use and modify, but commercial use requires sharing the source code.; Requirements: Min 1 GB RAM; Requires Docker; Requires setting up environment variables for access control and optional API keys.; Supports deployment via Vercel and Cloudflare, and can be installed as a Chrome extension.; Both Prompt Optimizer and promptfoo are tools focused on evaluating and enhancing the effectiveness of prompts used with LLMs, albeit through different methodologies; Tags unique to prompt-optimizer: ai-prompts, ai-tools, llm, prompt-engineering; Also covers Developer Tools, LLM Frameworks; When you need to improve the quality of AI-generated content by refining your prompts, especially if you are working with TypeScript and prefer deployment options like Vercel or Cloudflare.
- When should I choose promptfoo over prompt-optimizer?
- Choose promptfoo over prompt-optimizer when License: promptfoo is MIT, prompt-optimizer is Other; Requirements: Requires Node.js >=22.22.0, with Node.js 24 LTS recommended.; API keys for most LLM providers are required and should be set as environment variables.; Both Prompt Optimizer and promptfoo are tools focused on evaluating and enhancing the effectiveness of prompts used with LLMs, albeit through different methodologies; Tags unique to promptfoo: ci, ci-cd, cicd, evaluation; Also covers Evaluation & Observability; When you need to compare the performance of various LLMs such as GPT, Claude, Gemini, DeepSeek, and more.
- When should I avoid prompt-optimizer?
- If you are looking for a tool that does not require setting up environment variables for access control or API keys, as prompt-optimizer mandates configuring
ACCESS_PASSWORDand optionallyVITE_*. When you need a tool that is not licensed under AGPL-3.0, which requires sharing source code if you offer network services or distribute software. - When should I avoid promptfoo?
- If you are working with languages other than TypeScript, as Promptfoo is specifically designed for TypeScript environments. When you do not need to compare multiple LLMs and only require a simple prompt testing tool without advanced features like red teaming.
- Is prompt-optimizer or promptfoo more popular on GitHub?
- prompt-optimizer has more GitHub stars (34,977 vs 25,251). Stars measure visibility, not whether either tool fits your constraints.
- Are prompt-optimizer and promptfoo open source?
- Yes - both are open-source projects on GitHub (prompt-optimizer: Other, promptfoo: MIT).
- Where can I find alternatives to prompt-optimizer or promptfoo?
- GraphCanon lists graph-backed alternatives at prompt-optimizer alternatives and promptfoo alternatives (prompt-optimizer markdown twin, promptfoo markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, prompt-optimizer or promptfoo?
- prompt-optimizer: Active. promptfoo: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for prompt-optimizer and promptfoo?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: prompt-optimizer trust report; promptfoo trust report.