LangChain

langchain.com

LangChain declares 12 subprocessors in its subprocessor list, which we last checked on Nov 11, 2026 (evidence). They include Amazon Web Services, Google Cloud and OpenAI. No published changes since we first read it on Sep 22, 2026. 69 tracked vendors name LangChain as a subprocessor, including Pendo, Vanta and ZoomInfo.

Subprocessors CSV · Atom DORA draft CSV what's this? · 

12 third parties.

NamePurposeLocationListed since
Amazon Web Services AWS is LangChain's Cloud hosting provider and provides LLM inference for AI-powered features for applicable features and plans.; Cloud providerUSA
Anthropic AIAI model inference; Provides LLM inference for AI-powered featuresUSA
Baseten AIAI model inference; Provides LLM inference for AI-powered featuresUSA
Clickhouse Production Database; Production databaseUSA or Netherlands
Fireworks AI AIAI model inference; Provides LLM inference for AI-powered featuresUSA
Google Cloud Platform Cloud provider; GCP is LangChain's Cloud hosting provider and provides LLM inference for AI-powered features for applicable features and plans.USA or Netherlands
OpenAI AIAI model inference; Provides LLM inference for AI-powered featuresUSA
Parallel Web Systems Provides web search for AI-powered features; Web SearchUSA
Pylon Customer Support Ticketing and Communication; To provide customer support ticketing and communication servicesUSA
Stripe Payment Processing; To provide payment processing services for self-serve customersUSA
Supabase Authentication and backend services for LangSmith; Database providerUS or Germany
TypeSafe Inference; Inference provider for certain features (Filter Traces)USA

Web TechnologiesCSV · Atom

LangChain's homepage made 236 requests to 50 domains, 25 services controlled by another company, and 3 domains not identified.

Analytics (9): Google Cloud, ZoomInfo, Reo.Dev, Cloudflare, FullContact, LinkedIn, Meta, Primer Labs, Inc.; usually detected as Analytics: Plausible AnalyticsAdvertising (4): Influ2, Inc., OpenAI, X Corp., Reddit, Inc.CDN (2): jsDelivr, UNPKGMarketing automation (1): HubSpotLive chat (1): Qualified.com, Inc.A/B Testing (1): WebflowCookie compliance (1): CookieYesOther (6): Issue trackers: BugHerd; usually detected as Issue trackers: Sentry; usually detected as Appointment scheduling: Chili Piper; Customer data platform: Segment; Email: LiveIntent; Widgets: Navattic

25 third parties by category: Analytics 9Advertising 4CDN 2Marketing automation 1Live chat 1A/B Testing 1Cookie compliance 1Other 6

Third parties 25 · 229 requests
Webflow Intellimize Webflow 1.6.0 jQuery 3.5.1 34% of the page's requests 80
Qualified.com, Inc. Qualified 15% of the page's requests 35
Chili Piper chilipiper.com 10% of the page's requests 23
Google Cloudsubprocessor Google Analytics Google Font API Google Hosted Libraries Google Tag Manager 6% of the page's requests 14
BugHerd BugHerd 3% of the page's requests 7
HubSpot HubSpot 3% of the page's requests 7
CookieYes CookieYes 3% of the page's requests 6
ZoomInfo Zoominfo 3% of the page's requests 6
Navattic Navattic 2% of the page's requests 5
Reo.Dev Reo.Dev 2% of the page's requests 5
Influ2, Inc. Influ2 2% of the page's requests 4
LiveIntent LiveIntent 2% of the page's requests 4
OpenAIsubprocessor ChatGPT Ads Measurement Pixel 2% of the page's requests 4
jsDelivr FingerprintJS 3.4.2 jsDelivr 2% of the page's requests 4
Cloudflare Cloudflare Browser Insights cdnjs 1% of the page's requests 3
FullContact FullContact 1% of the page's requests 3
LinkedIn Linkedin Insight Tag 1% of the page's requests 3
Meta Facebook Pixel 2.9.435 1% of the page's requests 3
Segment Segment 1.84.3 1% of the page's requests 3
X Corp. Twitter Ads 1% of the page's requests 3
Reddit, Inc. Reddit Ads <1% of the page's requests 2
UNPKG Unpkg <1% of the page's requests 2
Plausible Analytics plausible.io <1% of the page's requests 1
Primer Labs, Inc. Primer <1% of the page's requests 1
Sentry sentry.io <1% of the page's requests 1
Unknown 3 · 5 requests

hubspotonwebflow.commpc2-prod-23-is5qnl632q-ue.a.run.appusbrowserspeed.com

First party 1 · 2 requests
LangChain Cloudflare GSAP 3.15.0 HTTP/3 LottieFiles Open Graph Plausible Priority Hints Sentry Swiper Webpack core-js 3.32.2 <1% of the page's requests 2

14 tracked companies loaded by the homepage are not in LangChain's subprocessor list. A website can use a service without it processing customer data.

Subprocessor of (69)CSV · Atom

1–50 of 69
  • 1mind 1mind.com Data Processor is an agent orchestration stack to build and monitor the 1mind application.
  • Abacum abacum.ai *Optional subproccessor. Active where AI features form part of the agreed services*; Unified Observability & Evals platform for LLMs
  • Ada Support ada.cx Logging
  • Alteryx alteryx.com Ask Alteryx system observability service
  • apiphani apiphani.io LLM trace and prompt monitoring for LuumenAI features
  • Apollo apollo.io
  • AppOmni appomni.com LLM monitoring/tracing. Only applicable when AI features are enabled.
  • CamelAI camelai.com Langsmith is used for monitoring traces and debugging user prompts, system prompts, and any messages created by our LLM providers. Langchain stores a trace of user messages messages, system messages, LLM messages, and any artifacts for 14 days and then is automatically deleted.
  • Campfire campfire.ai LLM observability platform. Stores traces of Ember chat sessions (prompts, responses, and tool calls) for debugging and quality evaluation.
  • Clay clay.com LLM logging and tracing
  • Clickagy clickagy.com AI development and observability services
  • Cognella cognella.com AI application development and orchestration framework.
  • Concord concord.app LLM tool
  • Conveo conveo.ai LLM Observability; Processing Activity Description observability tool to trace and debug all our LLM calls Data Residency / Processing Location United States Headquarters Location San Francisco, California
  • Conveyor conveyor.com Debugging, testing, and monitoring ConveyorAI performance.
  • Cube Dev cube.dev AI & Observability: AI Agent Tracing & Debugging; Used for tracing and monitoring the performance of AI agents and LLM chains. Processes execution logs and system metadata to ensure query accuracy and platform reliability.
  • Daloopa daloopa.com
  • Databox databox.com Platform for tracing, debugging, evaluation, testing, and monitoring LLM/agent apps.
  • DataCamp datacamp.com AI monitoring / observability; AI monitoring and evaluation, model performance tooling, and observability
  • DeepIntent deepintent.com AI and Machine Learning Tools; LLM application framework and tracing / observability platform
  • Drivetrain drivetrain.ai
  • EdSights edsights.com Chatbot Testing & Analytics; Products: Admit, Retain
  • Elementary Data elementary-data.com AI agent tracing and evaluation
  • Employment Hero employmenthero.com Engineering; Processing Activity: Logging and monitoring input/output data in Hero AI, SmartMatch and large language models (LLM) for optimising performance analytics. GDPR Transfer Mechanism: Standard Contractual Clauses
  • Ethos askethos.com LLM tracing, evaluation and observability
  • EverTrue evertrue.com USA AI observability/tracing tool
  • Featurebase featurebase.app AI tracing and monitoring
  • Fuel Cycle fuelcycle.com Providing AI observability and evaluation capabilities, as well as agent development and deployment.
  • GitGuardian gitguardian.com LLM observability and evaluation for Al-assisted features
  • GitLab gitlab.com Logging for AI-Powered Product Features
  • Hiver hiverhq.com IT Management
  • Hyros hyros.com LLM application development and monitoring platform
  • Jimdo jimdo.com
  • Knak knak.com AI Services
  • Lattice lattice.com * OPTIONAL - Applicable only to specific features within Lattice that customers have opted-in to use. Monitoring and optimization for Lattice AI features
  • Leapsome leapsome.com Application monitoring / observability and prompt evaluation
  • Mediafly mediafly.com Optional GenAI features
  • monday.com monday.com
  • MyTraffic mytraffic.io Tracing and debugging of LLM interactions
  • n8n n8n.io AI provider
  • NeverBounce neverbounce.com AI development and observability services
  • OneTrust onetrust.com Deployment and observability for AI agents
  • Overpath overpath.ai LLM execution tracing, debugging and evaluation
  • Pendo pendo.io **Purpose:** (Recommended Optional) AI agent development infrastructure **Location(s) of processing:** US or EU (according to customer's hosting location)
  • Pilosa pilosa.com AI tracing and monitoring
  • Pipefy pipefy.com AI agent observability and tracing
  • Reflekt Legal reflektlegal.ai LLM tracing and observability
  • Revenue Grid revenuegrid.com Debug, evaluate, and monitor LLM workflows for development and QA
  • Sales Kong saleskong.com AI evaluation and monitoring
  • SalesHood saleshood.com Agent Observability
  • Show next 19

ComplianceCSV · Atom

Certified
Says it complies with

Certifications as LangChain's trust center lists them; reports are usually shared on request (evidence)

Service statusCSV · Atom

Aug 15: no incident reportedAug 16: no incident reportedAug 17: no incident reportedAug 18: no incident reportedAug 19: no incident reportedAug 20: 1 incident (1 major)Aug 21: no incident reportedAug 22: no incident reportedAug 23: no incident reportedAug 24: no incident reportedAug 25: no incident reportedAug 26: 1 incident (1 major)Aug 27: no incident reportedAug 28: no incident reportedAug 29: no incident reportedAug 30: no incident reportedAug 31: no incident reportedSep 1: 1 incident (1 major)Sep 2: 1 incident (1 major)Sep 3: no incident reportedSep 4: 1 incident (1 minor)Sep 5: no incident reportedSep 6: no incident reportedSep 7: no incident reportedSep 8: no incident reportedSep 9: no incident reportedSep 10: no incident reportedSep 11: no incident reportedSep 12: no incident reportedSep 13: no incident reportedSep 14: no incident reportedSep 15: no incident reportedSep 16: no incident reportedSep 17: no incident reportedSep 18: no incident reportedSep 19: no incident reportedSep 20: no incident reportedSep 21: no incident reportedSep 22: no incident reportedSep 23: no incident reportedSep 24: no incident reportedSep 25: no incident reportedSep 26: no incident reportedSep 27: no incident reportedSep 28: no incident reportedSep 29: no incident reportedSep 30: no incident reportedOct 1: no incident reportedOct 2: no incident reportedOct 3: 1 incident (1 major)Oct 4: no incident reportedOct 5: no incident reportedOct 6: no incident reportedOct 7: no incident reportedOct 8: 2 incidents (1 critical, 1 minor)Oct 9: no incident reportedOct 10: no incident reportedOct 11: no incident reportedOct 12: 2 incidents (2 major)Oct 13: no incident reportedOct 14: 1 incident (1 minor)Oct 15: no incident reportedOct 16: no incident reportedOct 17: no incident reportedOct 18: no incident reportedOct 19: no incident reportedOct 20: no incident reportedOct 21: no incident reportedOct 22: no incident reportedOct 23: no incident reportedOct 24: no incident reportedOct 25: no incident reportedOct 26: no incident reportedOct 27: no incident reportedOct 28: no incident reportedOct 29: no incident reportedOct 30: 1 incident (1 major)Oct 31: no incident reportedNov 1: no incident reportedNov 2: no incident reportedNov 3: no incident reportedNov 4: no incident reportedNov 5: no incident reportedNov 6: no incident reportedNov 7: no incident reportedNov 8: no incident reportedNov 9: no incident reportedNov 10: no incident reportedNov 11: no incident reportedNov 12: no incident reported

90 days agotoday

  • 12 incidents in 90 days
  • 9 major or critical
  • 2 h 37 min typical time to resolve
  • 2 days longest major
BeganIncidentImpactLasted
Increased latency and 500 ratemajor—
Sandbox Performance Degradedminor8 days
APAC Region Querying is downmajor—
Seeing some issues logging into the applicationmajor2 days
LLM Gateway service interruptioncritical—
Increased latency in Run Query V1 APIsminor1 h 42 min
LangSmith Deployment Database Provisioning Errormajor5 h 3 min
Thread-scoped sandbox initialization timeouts on new agentsminor2 h 18 min

Incidents per month

0 9 18 Jul 2026: 17 incidents (1 critical, 7 major, 8 minor, 1 no impact stated) · partial: our history begins Jul 15 Aug 2026: 5 incidents (3 major, 2 minor) · typical time to resolve 2 h 57 min Sep 2026: 3 incidents (2 major, 1 minor) · typical time to resolve 2 h 18 min Oct 2026: 7 incidents (1 critical, 4 major, 2 minor) · typical time to resolve 2 days Nov 2026: 0 incidents Jul 2026Aug Sep Oct Nov

critical major minor no impact stated before or partly before our history

As LangChain's status page reports its own incidents (scheduled maintenance left out), read every few hours since (evidence)

Incidents reported by LangChain's subprocessorsCSV · Atom

174 reported incidents in the last 30 days, by 10 of the vendors LangChain lists as subprocessors.

A subprocessor list names a company, not the service an incident touched. This does not show that LangChain was involved.

DateCompanyIncidentImpactLasted
FireworksService Degradation for GLM 5.3 Fast minor30 min
OpenAIUnable to start new Workspace Agent runs criticalongoing
FireworksService Degradation for Kimi K3.1 Pro minor2 min
OpenAIElevated errors affecting logins, sign-ups, and ChatGPT features minor8 min
BasetenModel APIs are down for all models critical21 min
SupabaseProject Lifecycle Issues in ap-northeast-1 minor4 h 48 min
ClickHouseProvisioning and scaling operations may take longer in AWS ap-northeast-1 Tokyo minor7 h 38 min
PylonSlack Integration Connection Issues major3 h 13 min
FireworksService Degradation for GLM 5.3 minor24 min
FireworksService Degradation for DeepSeek V4.1 Flash 1017 minor1 h 25 min
AnthropicElevated errors on Fable 52 and Mythos 52 no impact stated1 min
FireworksService Degradation for Kimi K3 minorongoing
FireworksService Degradation for Kimi K3 US minor1 h 5 min
OpenAIIncorrect cost data in Costs API exports no impact stated2 h 20 min
OpenAIElevated Errors On API minor42 min
OpenAIElevated ChatGPT Conversation Errors minor52 min
OpenAIElevated errors with image generation minor1 h 49 min
SupabaseInterruption in connections to Supavisor in eu-west-2 no impact stated1 h 41 min
AnthropicDegraded performance for Claude Fable 5.1 minor26 min
FireworksService Degradation for Qwen 3.8 Max minor3 min
FireworksService Degradation for GLM 5.3 Fast minor14 min
FireworksService Degradation for GLM 5.3 Fast minor10 min
FireworksService Degradation for GLM 5.3 Flash US minor24 min
FireworksService Degradation for GLM 5.3 Flash minor2 h 7 min
FireworksService Degradation for GLM 5.3 Flash minor10 min

And 149 more. All of them: CSV · Who is around them.

ChangesCSV · Atom

See the list as we read it on any date: Time machine

  1. Added certification: ISO/IEC 42001 evidence
Rating badge for LangChain's site

LangChain transparency rating

It updates with the rating.

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