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Product / UX / Telemetry & observability

WhyLabs

WhyLabs

AI observability platform for monitoring ML models and LLM applications in production. Provides data drift detection, performance monitoring, and LLM security guardrails. Built on the open source whylogs profiling library and LangKit LLM monitoring toolkit. Differentiated by statistical profiling approach, monitors distributions rather than individual requests, enabling cost-effective monitoring at scale.

WhyLabs ML/LLM observability. COMPANY DISCONTINUED: whylabs.ai states 'WhyLabs, Inc. is discontinuing operations' and open sourced the full platform plus whylogs and LangKit. The hosted SaaS observability platform is no longer operating; the OSS libraries remain on GitHub (whylogs Apache-2.0, 2.8k stars, latest release v1.6.4 Dec 2024).

Openness

5 high confidence
5.0
license
Apache-2.0(OSI, whylogs + LangKit + open sourced platform)
source
public(github.com/whylabs)
core-gated
ungated(nothing is withheld - the company ceased operations and open sourced the platform on closure)
hosted-SaaS
discontinued
status
company-ceased-ops, platform open sourced on closure

Scored on what remains accessible: the OSS stack. whylogs (data logging) and LangKit (LLM monitoring) are Apache-2.0, and WhyLabs open sourced its platform on shutdown. Score corrected from 4 to 5 on 2026-07-30. The earlier 4 was justified by the hosted backend no longer operating and the OSS pieces being libraries rather than a turnkey observability product, which are maturity judgments and are already recorded as adoption 2 and capability 2. On the openness question the published source is the whole product, because there is no longer anything else, and 4 pairs with open_core rather than open_source.

Adoption

2 low confidence
2.0

Hosted SaaS shut down (no active platform users). Remaining signal is the OSS libraries: whylogs ~2.8k GitHub stars, last release Dec 2024; stars_fallback caps at 3; placed at 2 given the dead commercial product and stalled release cadence. Honest signal is modest residual OSS usage, not a live platform.

Capability

2 medium confidence
2.0

As living, usable capability it is a pair of monitoring libraries (drift + LLM safety metrics), not a full tracing/eval/prompt platform; with the hosted backend gone and releases stalled since Dec 2024, rated 2, well below the MLflow/Langfuse C4 anchors.

Unchanged since 2026-07-30 (last edited, not re-checked)