WhyLabs
WhyLabs built an AI observability platform (AI Observatory) with open-source tools whylogs and langkit to monitor data quality, model health, and LLM behavior for AI/ML teams deploying production AI systems.
- Company typePrivate
- Founded2019
- HeadquartersSeattle, United States
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What WhyLabs does
WhyLabs, Inc. was a Seattle-based AI observability company founded in 2019 that built monitoring tools for AI and machine learning applications in production. Its core commercial offering, the AI Observatory platform, provided visibility into data quality and model health, including capabilities for detecting data drift, tracking model performance, and supporting responsible AI operations. The company complemented this platform with two open-source projects: whylogs, an open standard for privacy-preserving data logging that supports tabular, relational, and time-series data, and langkit, an open source toolkit for monitoring and securing large language models while preserving privacy.
WhyLabs operated a dual go-to-market combining a product-led growth motion (a free self-serve tier for individual developers and small teams) with an enterprise sales motion for larger deployments, supported by subscription-based pricing with custom enterprise contracts. Its primary customer segment was AI/ML teams and data organizations deploying AI applications horizontally across use cases, and it built awareness through the "Robust and Responsible AI" community that drew thousands of participants. The company raised a $4 million early-stage round in September 2020 (led by Madrona) and a $10 million Series A in November 2021 (co-led by Defy Partners and Andrew Ng's AI Fund, with participation from Bezos Expeditions). WhyLabs was acquired by Apple in 2025 as part of Apple's broader AI strategy; following the acquisition, the company discontinued operations and open-sourced its complete platform stack to the community.
WhyLabs firmographics
Firmographics- Name
- WhyLabs
- Legal name
- WhyLabs, Inc.
- Website
- https://whylabs.ai
- Company type
- Private
- Founded year
- 2019
- Operating status
- Closed
- Headcount range
- 11–50 employees
- Short description
- WhyLabs built an AI observability platform (AI Observatory) with open-source tools whylogs and langkit to monitor data quality, model health, and LLM behavior for AI/ML teams deploying production AI systems.
- Ownership category
- akta.pro rank
WhyLabs industry classification
Industry- Product category
- AI Observability Platform
- NAICS
- Software Publishers (513210)
- akta.pro primary industry
- Enterprise AI Governance, Risk & Compliance Platforms (Model Risk, Audit, Policies) (HDAEANAE)
- akta.pro secondary industries
- Audit, Explainability & Accountability Tooling (traceability, reporting) (HDAAAKAL), AI Observability, Monitoring & Evaluation Platforms (Drift, Quality, Safety) (HDAEANAF)
Keywords
Where WhyLabs is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
WhyLabs business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure
Revenue model
- AI Observability SaaS Platform: Subscription-based SaaS model offering AI observability and monitoring services for enterprises deploying AI applications
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free self-serve tier |
| Subscription | Annual | Enterprise tier |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels1 record
WhyLabs product offering
Product offeringCore offering
WhyLabs provided an AI Control Center / AI Observatory platform that delivered security and observability for AI and GenAI applications. The SaaS platform monitored data quality, model performance, and AI application health in production, complemented by the open-source whylogs library (privacy-preserving data logging standard) and langkit library (LLM monitoring toolkit).
Product overview
WhyLabs offered a unified AI Observability platform (AI Observatory) for monitoring data and model health in AI applications, complemented by two open source libraries: whylogs (open standard for privacy-preserving data logging) and langkit (LLM monitoring toolkit). The company has since discontinued operations and open-sourced the complete platform.
Differentiator
Problem solved
Functional benefit
Products and services
- AI Observatory Platform AI Observability SaaS platform that monitors data and model health for AI applications, providing monitoring tools for AI and data application monitoring. Targeted at AI/ML teams and data organizations deploying production AI systems.
- whylogs
Companies that use WhyLabs
Customer profileSegments1 record
Ideal customer profiles1 record
WhyLabs technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability4 records
Feature3 records
WhyLabs partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- ApplecoreApple acquired WhyLabs in 2025 as part of its strategy to strengthen AI and platform capabilities, acquiring specialized AI monitoring and observability technology.
Scale indicators3 records
Recent moves6 records
Expansion highlights5 records
WhyLabs competitors and assessment
Company assessmentBroad incumbents
- Datadog: Datadog is a broad observability and monitoring incumbent that has added AI/ML and LLM-specific monitoring capabilities, competing with WhyLabs from a much larger platform with extensive enterprise reach.
- New Relic: New Relic is an established observability platform expanding into AI application monitoring; it competes with WhyLabs as a broad incumbent offering AI features as part of a larger APM portfolio.
Direct peers
- Comet: Comet provides an ML platform covering experiment tracking, model monitoring, and production observability, serving the same ML engineering and data science teams that WhyLabs targeted.
- Aporia: Aporia provides ML observability with model monitoring, drift detection, and customizable guardrails, serving the same AI/ML platform teams as WhyLabs.
- Helicone: Helicone focuses specifically on LLM observability, providing logging, monitoring, and evaluation tooling for GenAI applications — a peer in the LLM-specific subset of WhyLabs' market.
- Arize AI: Arize AI provides an AI observability and evaluation platform for ML and LLM applications, directly competing with WhyLabs on model monitoring, drift detection, and production AI troubleshooting for similar ML/AI engineering buyers.
- Evidently AI: Evidently AI provides open-source and cloud tooling for ML model monitoring, drift detection, and data quality — a directly comparable observability stack targeting similar AI engineering personas.
- Fiddler AI: Fiddler AI offers an AI observability and model performance monitoring platform with explainability and responsible AI tooling — a near-direct peer targeting the same AI/ML engineering and governance buyer.
- Monte Carlo Data: Monte Carlo is a leader in data observability with overlap into ML model reliability; comparable to WhyLabs on the data health and pipeline monitoring dimension of the AI Observability stack.
- Superwise: Superwise offers an AI observability platform for production ML models, covering model health, drift, and bias monitoring — closely comparable to WhyLabs' AI Observatory offering.
Market position
Strengths3 records
Weaknesses3 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
WhyLabs social profiles
Digital presenceWhyLabs financial estimates
Financial estimateRevenue estimate
Valuation estimate
WhyLabs leadership team
Management profileNumber of profiles
Profiles1 record
WhyLabs funding detail
Funding detailFunding overview
Funding rounds2 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
WhyLabs M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about WhyLabs
What does WhyLabs do?
WhyLabs provided an AI Control Center / AI Observatory platform that delivered security and observability for AI and GenAI applications. The SaaS platform monitored data quality, model performance, and AI application health in production, complemented by the open-source whylogs library (privacy-preserving data logging standard) and langkit library (LLM monitoring toolkit).
Is WhyLabs a public or private company?
WhyLabs is a private company. It is classified as corporate owned and is currently closed.
When was WhyLabs founded?
WhyLabs was founded in 2019. It employs 11 to 50 people.
Where is WhyLabs based?
WhyLabs is headquartered in Seattle, United States, in the North America region.
How does WhyLabs make money?
One revenue line is on record: AI Observability SaaS Platform.
Who are WhyLabs's main competitors?
Broad incumbents on record are Datadog and New Relic. Direct peers are Comet, Aporia, Helicone, Arize AI, Evidently AI, Fiddler AI, Monte Carlo Data and Superwise.
Does WhyLabs have an API?
No public API is recorded for WhyLabs.
What industry is WhyLabs in?
WhyLabs's product category is AI Observability Platform. Its primary akta.pro industry code is HDAEANAE, Enterprise AI Governance, Risk & Compliance Platforms (Model Risk, Audit, Policies), with a secondary code of HDAAAKAL, Audit, Explainability & Accountability Tooling (traceability, reporting). Its NAICS code is 513210.