Helicone vs LangSmith
A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.
 Helicone Evaluation |  LangSmith Evaluation | |
|---|---|---|
| Tagline | Open-source LLM observability — one-line proxy install. | LangChain's eval + observability platform. |
| Category | Evaluation | Evaluation |
| Pricing | Freemium· Free 100k req/mo; Pro from $25/mo | Freemium· Developer: $0 · Plus: $39 · Enterprise: Custom pricing |
| Model | Platform (any LLM) | Platform (any LLM) |
| Editorial score | 8.3 / 10 | 8.7 / 10 |
| Use cases | observabilitycost trackingopen source | LLM tracingevalsLangChain integration |
| Pros |
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| Cons |
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| Website | www.helicone.ai | www.langchain.com |
Pick Helicone if
- ✅ One-line install
- ✅ Open source
- ✅ Generous free tier
- ✅ Cost tracking is genuinely useful
Pick LangSmith if
- ✅ Tight LangChain integration
- ✅ Strong tracing UX
- ✅ Mature dataset/eval flows
- ✅ Reasonable per-seat pricing