LangWatch

LangWatch provides software for developers to test, evaluate and monitor AI agents and LLM applications, with an AI gateway that budgets LLM spend per person, team and customer and Langy, an automated AI engineer that turns production traces into tests and pull requests.

StageUndisclosed

Founded—

HeadquartersAmsterdam, Netherlands

StatusPrivate

langwatch.ai

Products

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

LangWatch LLM observability Developer tool Sold on its own

LangWatch LLM observability traces model calls, tool calls and retrieval steps while displaying costs, latency and errors.
LangWatch AI Gateway API service Sold on its own

Gateway that puts every LLM call through one endpoint on the customer's own provider keys, with per-person, team, project and customer spending budgets, provider fallback, a trace for every call and webhooks for billing end customers.

Inside LangWatch LLM observability

LangWatch Instant Evals Application Paid add-on to the parent

A LangWatch component that evaluates stored agent conversations, traces, and LLM calls against questions expressed in plain language.
Langy AI agent Beta

LangWatch's automated AI engineer: it reads production traces, clusters failures, writes tests and opens a pull request with CI checks, running on the customer's own model keys; you review and merge.

Similar products 43

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

All 43Capability overlap 41Shared product type 40Same company status 30

RespanEarly-stageLangWatch AI Gateway and Respan AI Gateway both serve buyers who need to track and cut what we spend on AI models; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare AA

Arize AIUndisclosedLangWatch Instant Evals and Signal both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare L

LiteLLMEarly-stageLangWatch Instant Evals and LiteLLM Lens both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare T

TrimioUndisclosedLangWatch AI Gateway and Trimio both serve buyers who need to track and cut what we spend on AI models; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare H

HoneyHiveEarly-stageLangWatch LLM observability and HoneyHive both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare L

LunaryUndisclosedLangWatch LLM observability and Lunary both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare L

LaminarEarly-stageLangWatch LLM observability and Laminar Signals both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare P

PromptLayerEarly-stageLangWatch Instant Evals and PromptLayer Observability both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare M

MastraEarly-stageLangWatch Instant Evals and Mastra Studio both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.3 of 4 capabilitiesShared product typeCompare HA

Hume AIUndisclosedLangWatch Instant Evals and User Testing API both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare L

LangChainLate-stageLangWatch Instant Evals and LangSmith Chat both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare TT

The Token CompanyUndisclosedLangWatch AI Gateway and The Token Company LLM input compression both serve buyers who need to track and cut what we spend on AI models; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare MA

Maxim AIUndisclosedLangWatch Instant Evals and Maxim both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare O

OpenRouterLate-stageLangWatch Instant Evals and Ori Eval both serve buyers who need to test and evaluate an AI agent; LangWatch's scale not recorded.3 of 4 capabilitiesShared product typeCompare S

SplunkAcquiredOverlaps on data analysis and evaluation and observability; LangWatch's scale not recorded; Splunk is acquired, with no independent scale.2 of 4 capabilitiesShared product typeCompare CM

Comet MLEarly-stageLangWatch LLM observability and Cost Intelligence both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare AA

Arthur AIEarly-stageLangWatch LLM observability and Arthur Engine both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare G

GalileoAcquiredLangWatch LLM observability and Galileo both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; LangWatch's scale not recorded; Galileo is acquired, with no independent scale.1 of 4 capabilitiesShared product typeCompare AS

AI SpendOpsUndisclosedLangWatch AI Gateway and AI SpendOps both serve buyers who need to track and cut what we spend on AI models; scale not recorded for either; ships infrastructure service rather than the same layer.1 of 4 capabilitiesDifferent layerCompare ND

Not DiamondUndisclosedLangWatch AI Gateway and Not Diamond Code both serve buyers who need to track and cut what we spend on AI models; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare W&

Weights & BiasesAcquiredLangWatch LLM observability and W&B Weave both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; LangWatch's scale not recorded; Weights & Biases is acquired, with no independent scale.3 of 4 capabilitiesShared product typeCompare C

CoreWeavePublicLangWatch LLM observability and CoreWeave ARIA both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; LangWatch's scale not recorded.3 of 4 capabilitiesShared product typeCompare D

DynatracePublicLangWatch LLM observability and Dynatrace AI Observability both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare C

ClickHouseLate-stageLangWatch LLM observability and ClickStack both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either; ships agent platform, data service and 1 more rather than the same layer.2 of 4 capabilitiesDifferent layerCompare E

ElasticPublicOverlaps on data analysis, evaluation and observability and model inference; LangWatch's scale not recorded.3 of 4 capabilitiesShared product typeCompare T

TrueFoundryEarly-stageLangWatch LLM observability and TrueFoundry Agent Gateway both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare H

HeliconeAcquiredLangWatch LLM observability and Helicone both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; LangWatch's scale not recorded; Helicone is acquired, with no independent scale.1 of 4 capabilitiesShared product typeCompare D

DatadogPublicLangWatch LLM observability and Agent Observability both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; LangWatch's scale not recorded.3 of 4 capabilitiesShared product typeCompare NR

New RelicUndisclosedLangWatch LLM observability and New Relic AI Observability both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare G

Guild.aiUndisclosedLangWatch LLM observability and Guild agent control plane both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare P

ParloaLate-stageLangWatch Instant Evals and Parloa Performance Lab both serve buyers who need to test and evaluate an AI agent; LangWatch's scale not recorded.1 of 4 capabilitiesShared product typeCompare D

DecagonLate-stageLangWatch Instant Evals and Experiments both serve buyers who need to test and evaluate an AI agent; LangWatch's scale not recorded.2 of 4 capabilitiesShared product typeCompare D

DatabricksLate-stageLangWatch LLM observability and Agent Bricks both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; LangWatch's scale not recorded.3 of 4 capabilitiesShared product typeCompare M

Mem0Early-stageLangWatch LLM observability and Gateway both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; scale not recorded for either.Shared product typeCompare L

LivePersonAcquiredLangWatch Instant Evals and LivePerson Syntrix both serve buyers who need to test and evaluate an AI agent; LangWatch's scale not recorded; LivePerson is acquired, with no independent scale.2 of 4 capabilitiesShared product typeCompare FA

Fireworks AILate-stageLangWatch AI Gateway and Fireworks Nexus both serve buyers who need to track and cut what we spend on AI models; LangWatch's scale not recorded.1 of 4 capabilitiesShared product typeCompare E

eGainPublicLangWatch Instant Evals and eGain Smart Evaluator both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.2 of 4 capabilitiesShared product typeCompare S

SnowflakePublicLangy and Snowflake CoCo both list agentic coding; LangWatch's scale not recorded.3 of 4 capabilitiesShared product typeCompare S

SpendlineUndisclosedLangWatch AI Gateway and Spendline both serve buyers who need to track and cut what we spend on AI models; scale not recorded for either; ships platform rather than the same layer.Different layerCompare KC

Kilo CodeAcquiredLangWatch AI Gateway and Kilo Gateway both serve buyers who need to track and cut what we spend on AI models; LangWatch's scale not recorded; Kilo Code is acquired, with no independent scale.2 of 4 capabilitiesShared product typeCompare I

ImbueLate-stageLangy and Blueprint both list agentic coding; scale not recorded for either.1 of 4 capabilitiesShared product typeCompare F

FinAcquiredLangWatch LLM observability and Fin Analyze both serve buyers who need to watch an AI agent for suspicious or runaway behaviour; LangWatch's scale not recorded; Fin is acquired, with no independent scale.3 of 4 capabilitiesShared product typeCompare H

HarnessLate-stageLangWatch Instant Evals and AI Evals both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.3 of 4 capabilitiesShared product typeCompare

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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.