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Indie alternatives to LangSmith
3 products made by independent developers and small teams that do what LangSmith does, 3 of them with a free plan. Free and open-source options come first.
At a glance
| Product | Price | Open source | Self-host | Platforms |
|---|---|---|---|---|
| Braintrust | Free plan | – | – | Web, API |
| Helicone | Free plan | Yes | Yes | Web, Self-hosted, API |
| Langfuse | Free plan | Yes | Yes | Web, Self-hosted, API |
The alternatives
1. Braintrust
Evals, logging and prompt playground for AI products
Braintrust helps teams evaluate AI models and prompts, log production traces, and iterate in a shared playground.
Free plan · Web, API · Website ↗
Questions
Is there a free alternative to LangSmith?
Yes. 3 of the 3 indie alternatives listed here have a free plan or are free: Braintrust, Helicone and Langfuse.
Is there an open-source alternative to LangSmith?
Helicone and Langfuse are open source.
Can I self-host an alternative to LangSmith?
Yes: Helicone and Langfuse can run on your own server.
What makes these alternatives to LangSmith “indie”?
They are built by independent developers or small teams rather than large companies. Each one is listed because it does the same core job as LangSmith.
Ask your AI instead
Add Indie Alternatives to ChatGPT, Claude or Cursor and ask “a cheaper LangSmith alternative that works on my Mac” in your own words, with your budget and platform. Set it up
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