B

Braintrust

Infrastructure

Evaluation and observability platform for AI agents, tracing them in production and scoring them against datasets.

Total funding$125M

Valuation—

Employees—

Founded—

HeadquartersSan Francisco, USA

StatusPrivate

Product

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

• Braintrust Platform Sold on its own

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

Closest alternatives 2

GGalileoAcquired ($68M deal)Galileo's own comparison page.1 of 1 capabilityShared product typeSourced competitorBuild and run AI agentsCompareLLangChainPrivate · $160M 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 1 capabilityShared product typeSame scale bandSourced competitorBuild and run AI agentsCompare

Similar products 18

How this list is ranked ↗

FAFiddler AIPrivate · $100M raisedBraintrust 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).1 of 1 capabilityShared product typeSame scale bandCompareAAArthur AIPrivate · $62.7M raisedBraintrust and Arthur both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private).1 of 1 capabilityShared product typeCompareCMComet MLPrivate · $70M raisedBraintrust 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 1 capabilityShared product typeCompareDDeepchecksAbsorbedBraintrust 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 1 capabilityShared product typeCompareHHeliconeAcquiredBraintrust 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 1 capabilityShared product typeCompareLLangfuseAcquiredBraintrust and Langfuse both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Langfuse is acquired, with no independent scale.1 of 1 capabilityShared product typeCompareAAArize AIPrivateBraintrust and Arize AX both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Arize AI's scale not recorded.1 of 1 capabilityShared product typeCompareCClickHousePrivate · $1.1B raisedBraintrust and ClickStack both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private).1 of 1 capabilityShared product typeCompareW&Weights & BiasesAcquiredOverlaps on evaluation and observability; Weights & Biases is acquired, with no independent scale.1 of 1 capabilityShared product typeCompareSSplunkAcquiredBraintrust 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.1 of 1 capabilityShared product typeCompareEElasticPublic · $10.2BBraintrust and Elastic LLM Observability both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (public).1 of 1 capabilityShared product typeCompareCCoreWeavePublic · $48.5BBraintrust and CoreWeave ARIA both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (public).1 of 1 capabilityShared product typeCompareHAHume AIPrivateBraintrust 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 1 capabilityShared product typeCompareDDatabricksPrivate · $190BBraintrust and Agent Bricks both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private).1 of 1 capabilityShared product typeCompareCCognigyAcquiredBraintrust and Cognigy AI Ops Center both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; Cognigy is acquired, with no independent scale.1 of 1 capabilityShared product typeCompareBByteDancePrivateBraintrust and Coze Loop both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; ByteDance's scale not recorded.1 of 1 capabilityShared product typeCompareDDatadogPublic · $84.9BBraintrust and Agent Observability both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (public); ships AI agent, agent platform and 2 more rather than the same layer.1 of 1 capabilityDifferent layerCompareMMercorPrivate · $20BBraintrust and Mercor Enterprise Evals both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; similar scale (private); ships data service rather than the same layer.1 of 1 capabilityDifferent layerCompare

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

Company disclosure · 17 Feb 2026

$125M is the sum of two figures Braintrust states itself, and the company has published no cumulative total since the Series A. Its Series A post, 2024-10-08: "we've raised $36 million to advance the future of AI software engineering, bringing our total funding to $45 million." Its Series B post, 2026-02-17: "Braintrust has raised $80M to become the observability layer for production AI", led by ICONIQ with Andreessen Horowitz, Greylock, Elad Gil and basecase returning -- that post states no running total. $45M + $80M is arithmetic on the company's own two numbers, not an estimate,.

Description

Company disclosure · 18 Sep 2026

Own homepage, read 2026-09-18: "Ship quality agents at scale -- Discover patterns in production, turn them into evals, and improve quality with every release." Its named surfaces are Observe, Evaluate, Discover, the Loop agent, pattern automations and Brainstore. Delivery test: the platform stores and scores the customer's own production agent traces.

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