Braintrust vs LangChain

Braintrust — Infrastructure · Private · $125M raised · 1 of 1 figure sourced  |  LangChain — Infrastructure · Private · $160M raised · 3 of 3 figures sourced

Relationship

CB Insights names Braintrust among LangChain's direct competitors; Braintrust's eval/observability platform is the closest functional match to LangSmith, both tagged build-ai-agents.

1 of 1 capabilityShared product typeSame scale bandSourced competitorBuild and run AI agents

1 of 1 capability — Shares evaluation and observability.

Ludbee capability tags · from the product records

Shared product type — Both ship platform.

Ludbee product records

Same scale band — Both growth-stage private.

Ludbee scale bands · from valuation and funding figures

Sourced competitor — “Compare LangSmith and Braintrust to see how a complete agent engineering platform differs from an evaluation-focused tool.”

langchain.com · checked 2026-09-19

Build and run AI agents — Rivals on this job — Create agents that plan multi-step work across tools and data, then deploy, govern and watch them in production.

Ludbee needs vocabulary · the scope on the sourced edge

Aligned comparison

FieldBraintrustLangChain
Capital raised$125M$160M LangChain has 28% more
Employees—46
Founded—2023
StatusPrivatePrivate match
CategoryInfrastructureInfrastructure match
Stack layerPlatformAgent platform, Developer tool, Platform
HeadquartersSan Francisco, USASan Francisco, USA match

Capability overlap

Shared · 1

Evaluation and observability

Not verified for Braintrust · 2

Agent orchestrationKnowledge retrieval

Recorded for LangChain. Braintrust’s product records say nothing either way — a missing record is not a missing capability.

Braintrust has no capability LangChain lacks, among the 1 recorded here.

Products, side by side

Hand-checked pairing

Braintrust

Platform

BraintrustPlatform

Stores production agent traces in its own datastore, turns the patterns it finds there into evaluation datasets, and scores every release against them.

LangChain

Platform

LangSmithPlatform

Traces, evaluates and monitors language-model applications in development and production.

No counterpart

LangChain sells these in a stack layer with no product recorded for Braintrust yet — nothing on the other side to compare them against.

Agent platform

LangSmith Context HubAgent platform

Versions and deploys prompts and agent context. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

LangSmith DeploymentAgent platform

Deploys and operates production agents. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

LangSmith EngineAgent platform

Analyzes agent traces and recommends fixes. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

LangSmith FleetAgent platform

No-code agent building, deployment into Slack/Teams/Gmail, and human-in-the-loop approval controls. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

LangSmith LLM GatewayAgent platform

Governs model calls and spending across providers. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

LangSmith SandboxesAgent platform

Runs agent-generated code in isolated virtual machines. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

Developer tool

LangChainDeveloper tool

Open-source framework for composing language-model calls, tools and retrieval into applications.

LangGraphDeveloper tool

Open-source library for building agents as explicit graphs of steps and state.

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