# Braintrust vs Langchain: who uses which

On usedby, 39 companies use Braintrust and 32 use Langchain. No company is listed with both yet. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-07: 71 of 71 public lines checked.

## Side by side

|  | [Braintrust](https://www.usedby.ai/tools/braintrust.md) | [Langchain](https://www.usedby.ai/tools/langchain.md) |
|---|---|---|
| Public customers | 39 | 32 |
| Confirmed | 15 | 13 |
| Observed | 24 | 16 |
| Signals (job posts) | 0 | 3 |
| Top industries of customers | DevTools & Infrastructure (10), Fintech & Payments (4), Artificial Intelligence (2) | HR & Recruiting (4), Fintech & Payments (3), Biotech & Pharma (2) |
| Category | LLM Ops & Frameworks | LLM Ops & Frameworks |
| Security | SOC 2 Type II ([trust.braintrust.dev](https://trust.braintrust.dev/), checked 2026-10-07) | — |
| Data processing terms | A data processing agreement is available. ([trust.braintrust.dev](https://trust.braintrust.dev/), checked 2026-10-07) | — |
| Free trial | Free trial or free plan available. ([braintrust.dev](https://www.braintrust.dev/pricing), checked 2026-10-07) | Free trial or free plan available. ([langchain.com](https://www.langchain.com/pricing), checked 2026-10-04) |
| Integrations | OpenTelemetry, Vercel AI SDK, Claude Agent SDK, OpenAI Agents SDK, LlamaIndex, CrewAI, AgentScope, LangChain, LangSmith, LangGraph ([braintrust.dev](https://www.braintrust.dev/docs/integrations), checked 2026-10-07) | — |
| Pricing | Starter: $0 / month; Pro: $249 / month; Enterprise: contact sales ([braintrust.dev](https://www.braintrust.dev/pricing), checked 2026-10-07) | Developer: $0 seat per month; Plus: $39 seat per month; Enterprise: contact sales ([langchain.com](https://www.langchain.com/pricing), checked 2026-10-04) |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Braintrust: [Rex](https://www.usedby.ai/case-studies/rex-braintrust.md): **30-min**: “Continuous signal, 30-min fix cycles” (captured by usedby 2026-10-06)
- Braintrust: [Navan](https://www.usedby.ai/case-studies/navan-braintrust.md): story without a checked figure. (captured by usedby 2026-10-06)

---
Source: https://www.usedby.ai/compare/braintrust-vs-langchain · How we check: https://www.usedby.ai/methodology