RAGFlow vs 
Promptfoo
RAGFlow vs Promptfoo compared for 2026 — features, license, ease of use, performance and which one to choose. Deep-document-understanding RAG vs Unit tests for your prompts.
Updated regularly · curated by OpenSourceAI.tech
RAGFlow vs Promptfoo at a glance
| Spec | RAGFlow | Promptfoo |
|---|---|---|
| Category | LLM / RAG framework | LLM / RAG framework |
| Type | RAG engine | Prompt testing |
| License | Apache-2.0 | MIT |
| Runs locally | Self-hosted | Yes |
| Primary language | Python | TypeScript |
| Ease of use | Intermediate | Beginner |
| Best for | RAG over messy, complex documents | teams shipping prompts to production |
| GitHub stars | 85.2k | 23.3k |
How RAGFlow and Promptfoo score
| Criterion | RAGFlow | Promptfoo |
|---|---|---|
| Popularity | 4.5 | 3.5 |
| Maintenance | 5.0 | 5.0 |
| Ease of use | 3.5 | 5.0 |
| Privacy | 4.5 | 5.0 |
| License freedom | 5.0 | 5.0 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
RAGFlow
RAGFlow is an open-source RAG engine built on deep document understanding, extracting clean structure from complex files to give LLMs grounded, cited answers.
- Strong document layout understanding
- Grounded answers with citations
- Self-hostable web UI
Promptfoo
Promptfoo runs your prompts against test cases across models, catching regressions before they reach production, and includes red-teaming checks.
- Regression tests for prompts
- Compares models side by side
- Built-in security red-teaming
Key differences
RAGFlow is rAG engine, while Promptfoo is prompt testing. Their licenses differ (Apache-2.0 vs MIT), which matters if you ship a commercial product. RAGFlow leans more intermediate-friendly, whereas Promptfoo is more suited to beginner users. They also differ in how they run (Self-hosted vs Yes). In short, RAGFlow fits RAG over messy, complex documents, and Promptfoo fits teams shipping prompts to production.
Which should you choose?
Choose RAGFlow for RAG over messy, complex documents. Choose Promptfoo for teams shipping prompts to production.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is RAGFlow or Promptfoo easier to use?
Promptfoo is generally the easier of the two to get started with, while RAGFlow rewards more setup with more control.
Are RAGFlow and Promptfoo free?
RAGFlow is free and open source (Apache-2.0), and Promptfoo is free and open source (MIT). Neither charges for the core software.
Can I run RAGFlow and Promptfoo locally?
RAGFlow: self-hosted · Promptfoo: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
RAGFlow vs Promptfoo — which should I pick in 2026?
Choose RAGFlow for RAG over messy, complex documents. Choose Promptfoo for teams shipping prompts to production.
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