Langfuse vs LangSmith
Langfuse and LangSmith are both AI Platforms tools in our directory. This side-by-side comparison covers pricing, user ratings, supported platforms, key features and open-source status so you can decide which one fits your needs.
Side-by-side comparison
| Attribute | Langfuse | LangSmith |
|---|---|---|
| Vendor | Langfuse | LangChain |
| Rating | ★ 4.6 | ★ 4.4 |
| Pricing | Freemium | Freemium |
| Platforms | Web, API, Self-host | Web, API |
| Key features | Open-source traces for LLM apps, Prompt versioning & playground, Datasets and evals | Full trace visibility for chains & agents, Dataset + evaluation workflows, Prompt playground with versioning |
| Headquarters | Berlin, Germany | San Francisco, USA |
| Founded | 2022 | 2023 |
| Open source | Yes | No |
Key differences
- Langfuse has a higher user rating (4.6★ vs 4.4★).
- Both Langfuse and LangSmith use a Freemium model.
- Langfuse is open source (its code is public), while LangSmith is proprietary.
- Langfuse runs on Web, API, Self-host; LangSmith runs on Web, API.
Frequently asked questions
Is Langfuse or LangSmith better?
By user rating, Langfuse scores higher (4.6★ vs 4.4★). Both are capable AI Platforms tools, so review the feature comparison for your use case.
Which is cheaper, Langfuse or LangSmith?
Both Langfuse and LangSmith use a Freemium pricing model.
Are Langfuse and LangSmith open source?
Langfuse is open source, while LangSmith is proprietary.