LiteLLM vs 
Promptfoo
LiteLLM vs Promptfoo compared for 2026 — features, license, ease of use, performance and which one to choose. One API for 100+ LLM providers vs Unit tests for your prompts.
Updated regularly · curated by OpenSourceAI.tech
LiteLLM vs Promptfoo at a glance
| Spec | LiteLLM | Promptfoo |
|---|---|---|
| Category | LLM / RAG framework | LLM / RAG framework |
| Type | LLM gateway / SDK | Prompt testing |
| License | MIT | MIT |
| Runs locally | Cloud-optional | Yes |
| Primary language | Python | TypeScript |
| Ease of use | Beginner | Beginner |
| Best for | teams standardizing on one LLM interface | teams shipping prompts to production |
| GitHub stars | 53.8k | 23.3k |
How LiteLLM and Promptfoo score
| Criterion | LiteLLM | Promptfoo |
|---|---|---|
| Popularity | 4.5 | 3.5 |
| Maintenance | 5.0 | 5.0 |
| Ease of use | 5.0 | 5.0 |
| Privacy | 3.5 | 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
LiteLLM
LiteLLM is a gateway and SDK that exposes 100+ LLM providers behind the OpenAI format, adding routing, fallbacks, budgets and observability.
- OpenAI-format access to 100+ providers
- Routing, fallbacks, budgets and rate limits
- Proxy server for org-wide governance
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
LiteLLM is lLM gateway / SDK, while Promptfoo is prompt testing. They also differ in how they run (Cloud-optional vs Yes). In short, LiteLLM fits teams standardizing on one LLM interface, and Promptfoo fits teams shipping prompts to production.
Which should you choose?
Choose LiteLLM for teams standardizing on one LLM interface. 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 LiteLLM or Promptfoo easier to use?
Both sit at a similar level (Beginner). Your choice should come down to fit rather than difficulty.
Are LiteLLM and Promptfoo free?
LiteLLM is free and open source (MIT), and Promptfoo is free and open source (MIT). Neither charges for the core software.
Can I run LiteLLM and Promptfoo locally?
LiteLLM: cloud-optional · Promptfoo: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
LiteLLM vs Promptfoo — which should I pick in 2026?
Choose LiteLLM for teams standardizing on one LLM interface. Choose Promptfoo for teams shipping prompts to production.
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