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LangChain

Infrastructure

Framework and platform for building AI applications with LLMs.

Total funding$160M

Valuation—

Employees46

Founded2023

HeadquartersSan Francisco, USA

StatusPrivate

Products

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

• LangChain Developer tool Sold on its own

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

• LangGraph Developer tool Sold on its own

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

• LangSmith Platform Sold on its own

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

Inside LangSmith

• LangSmith Context Hub Agent 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 Fleet Agent platform Included with the parent

  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 Sandboxes Agent platform Included with the parent

  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).

Inside LangSmith Plus

• LangSmith Deployment Agent platform Included with the parent

  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 Engine Agent platform Included with the parent

  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 LLM Gateway Agent platform Included with the parent

  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).

Closest alternatives 5

DdeepsetPrivate · $46M raiseddeepset's own Haystack documentation positions Haystack as an alternative to LangGraph for building agentic, multi-step AI workflows, with a migration guide mapping LangGraph concepts onto Haystack's.2 of 3 capabilitiesShared product typeSourced competitorBuild and run AI agentsCompareCCrewAIPrivate · $18M raisedCrewAI's own migration guide frames CrewAI Flows as the destination for teams leaving LangGraph, for the same orchestration job.1 of 3 capabilitiesShared product typeSourced competitorBuild and run AI agentsCompareBBraintrustPrivate · $125M raisedCB 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 3 capabilitiesShared product typeSame scale bandSourced competitorBuild and run AI agentsCompareLLangfuseAcquiredLangfuse's own FAQ/comparison page runs a direct head-to-head against LangSmith; both are LLM/agent observability platforms tagged build-ai-agents.1 of 3 capabilitiesShared product typeSourced competitorBuild and run AI agentsCompareMMastraPrivate1 of 3 capabilitiesShared product typeSourced competitorBuild and run AI agentsCompare

Similar products 19

How this list is ranked ↗

EElasticPublic · $10.2BLangSmith and Elastic LLM Observability both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (public).3 of 3 capabilitiesShared product typeCompareGGalileoAcquired ($68M deal)LangSmith and Galileo both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Galileo is acquired, with no independent scale.1 of 3 capabilitiesShared product typeCompareFAFiddler AIPrivate · $100M raisedLangSmith and Fiddler AI both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; same layer and the same scale band (growth-stage private).2 of 3 capabilitiesShared product typeSame scale bandCompareAAArthur AIPrivate · $62.7M raisedLangSmith and Arthur both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private).2 of 3 capabilitiesShared product typeCompareDDeepchecksAbsorbedLangSmith and Deepchecks LLM Evaluation both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Deepchecks is absorbed, with no independent scale.1 of 3 capabilitiesShared product typeCompareCMComet MLPrivate · $70M raisedLangSmith and Comet Model Production Monitoring both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private).1 of 3 capabilitiesShared product typeCompareSSplunkAcquiredLangSmith and Splunk Observability Cloud both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Splunk is acquired, with no independent scale.2 of 3 capabilitiesShared product typeCompareAAArize AIPrivateLangSmith and Arize Phoenix both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Arize AI's scale not recorded.2 of 3 capabilitiesShared product typeCompareHHeliconeAcquiredLangSmith and Helicone both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Helicone is acquired, with no independent scale.1 of 3 capabilitiesShared product typeCompareCClickHousePrivate · $1.1B raisedLangSmith and ClickStack both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private).2 of 3 capabilitiesShared product typeCompareDDatabricksPrivate · $190BLangSmith and Agent Bricks both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private).3 of 3 capabilitiesShared product typeCompareW&Weights & BiasesAcquiredLangSmith and W&B Weave both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Weights & Biases is acquired, with no independent scale.1 of 3 capabilitiesShared product typeCompareLLlamaIndexPrivateOverlaps on agent orchestration and knowledge retrieval; LlamaIndex's scale not recorded.2 of 3 capabilitiesShared product typeCompareBByteDancePrivateLangSmith and Coze Loop both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; ByteDance's scale not recorded.2 of 3 capabilitiesShared product typeCompareSSnowflakePublic · $116BOverlaps on agent orchestration and knowledge retrieval; similar scale (public).2 of 3 capabilitiesShared product typeCompareITInvisible TechnologiesPrivate · $144M raisedLangSmith and Synapse both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; same layer and the same scale band (growth-stage private).2 of 3 capabilitiesShared product typeSame scale bandCompareHAHume AIPrivateLangSmith and Kairos Platform both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Hume AI's scale not recorded.1 of 3 capabilitiesShared product typeCompareUUniphorePrivate · $2.5BOverlaps on agent orchestration and knowledge retrieval; similar scale (private).2 of 3 capabilitiesShared product typeCompareIIBMPublic · $216.6BLangSmith and IBM watsonx.governance both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (public).3 of 3 capabilitiesShared product typeCompare

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.

Sources

Total funding

Third-party database · 11 Sep 2026

CB Insights and getlatka agree on $160M (2 of 3 sources; Tracxn alone reports $260M). LangChain's own blog states only the $125M round amount, not a cumulative figure, so no primary source states the total. Corrects the previously recorded $35M, which reflected only an early round.

Employees

News reporting · Apr 2025

Forbes company profile for LangChain, "Employees" stated as of April 2025. Read 2026-08-27.

Founded

Company disclosure · 11 Sep 2026

CORRECTED from a previously recorded 2022: LangChain's own About page states co-founders Harrison Chase and Ankush Gola "start[ed] LangChain, the company, in early 2023"; 2022 is when the open-source framework was released, not when the company was founded.

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