Basalt
Basalt is an AI engineering platform that manages prompts, datasets, experiments, and observability via API/SDK and a web application to support shipping and iterating on LLMs and agent features.
Published Sep 1, 2026
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| Aspect | Basalt | Langfuse | LangSmith |
|---|---|---|---|
| Starting Price | Public materials indicate an initial free merged-PR offering and billing on a per-merged-PR basis; explicit per-PR pricing is not publicly disclosed | Public pricing shows a free tier and base plans with usage-based billing | Pricing is usage-based; public materials describe pay-for-what-you-use with retention considerations (detailed calculators may require account access) |
| Best For | Teams seeking an integrated workflow from observed failures to automated suggested fixes plus prompt/dataset/experiment workflows | Teams wanting open-source/self-host flexibility or transparent usage-unit pricing | Teams using LangChain extensively who want tracing and evaluation tightly integrated with that ecosystem |
| Key Strength | Distinguishes itself by combining an automated PR suggestion and validation workflow with prompt and eval management | Open-source posture, self-host option, transparent unit economics and community adoption | Tight integration with LangChain tooling and ecosystem presence |
| Key Weakness | Limited third-party reviews; public enterprise security/compliance documentation is sparse; per-PR pricing not publicly disclosed | Self-hosting requires engineering effort and operational overhead for some teams | Cost and developer-centric workflows can be concerns for some users |