Agenta vs Langfuse
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Open source
An open-source LLMOps platform combining a prompt playground, prompt versioning, evaluations and tracing.
AI tool · Open source
An open-source LLM engineering platform for tracing, prompt management, evaluations and cost tracking.
The short answer
Choose Agenta if you need…
- Teams wanting a self-hostable prompt platform
- Systematic prompt evaluation
Choose Langfuse if you need…
- Tracing LLM apps in production
- Self-hosted prompt management
Side-by-side
| Agenta | Langfuse | |
|---|---|---|
| Type | Prompting · Prompt managers | Prompting · Evaluation & observability |
| Price | Open source | Open source |
| Platforms | Web, Self-hosted, API | Web, Self-hosted, API |
| Works with | LangChain, OpenAI | LangChain, OpenAI, LlamaIndex |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
Agenta
An open-source LLMOps platform combining a prompt playground, prompt versioning, evaluations and tracing. Good all-in-one open option. Smaller community than the biggest players, so expect fewer integrations.
Langfuse
An open-source LLM engineering platform for tracing, prompt management, evaluations and cost tracking. A popular, well-documented default for observability. Self-hosting at scale needs some operational effort.
Best for
Agenta
- Teams wanting a self-hostable prompt platform
- Systematic prompt evaluation
Langfuse
- Tracing LLM apps in production
- Self-hosted prompt management
Strengths
Agenta
- Prompt playground and versioning
- Human and automatic evaluation
- Tracing
- Self-hosting
Langfuse
- Traces and spans for LLM calls
- Prompt management with versions
- Evals and datasets
- Cost and latency dashboards
Frequently asked questions
What is the difference between Agenta and Langfuse?
Agenta: An open-source LLMOps platform combining a prompt playground, prompt versioning, evaluations and tracing. Langfuse: An open-source LLM engineering platform for tracing, prompt management, evaluations and cost tracking. Agenta suits teams wanting a self-hostable prompt platform, while Langfuse suits tracing llm apps in production.
Are Agenta and Langfuse free?
Agenta: Open source. Langfuse: Open source.
What are other alternatives to Agenta and Langfuse?
Other options people compare them with include PromptLayer, PromptHub, Arize Phoenix, LangSmith, Opik.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.