WhyLabs

license

Apache-2.0(OSI, whylogs + LangKit + open sourced platform)

source

public(github.com/whylabs)

core features withheld

no — 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

WhyLabs shut down as a company and open sourced its whole platform on closing, so the published source is now the entire product rather than a share of a live one. Both whylogs and LangKit are Apache-2.0, and nothing is withheld, so the platform reads as open source rather than open core.

• https://github.com/whylabs/whylogs recorded 2026-08-13

  Repository page. GitHub resolves the LICENSE to Apache-2.0 and the README carries an Apache 2 badge; the source tree is public. 2,830 stars.

• https://pypi.org/pypi/langkit/json recorded 2026-09-29

  PyPI metadata for langkit: "Apache-2.0" with the classifier "License :: OSI Approved :: Apache Software License"; summary "A language toolkit for monitoring LLM interactions" listing "sentiment analysis" and "toxicity analysis" and "prompt injection".

• https://pypi.org/pypi/whylogs/json recorded 2026-09-29

  PyPI metadata for whylogs 1.6.4 (released 2024-12-03): "Apache-2.0" with the classifier "License :: OSI Approved :: Apache Software License"; summary "Profile and monitor your ML data pipeline end-to-end".

• https://whylabs.ai/langkit recorded 2026-09-29

  Closure notice: "WhyLabs, Inc. is discontinuing operations." The linked text "complete WhyLabs platform has been open sourced" continues "to help support next iterations of AI observability research." It links the open sourced platform at github.com/whylabs/whylabs-oss. Searched the body for pricing, enterprise and license key: none.

WhyLabs' hosted platform has shut down, leaving GitHub stars on the whylogs repository as the only remaining signal, and a star is not a download or a use. The reading sits lower than stars alone would suggest because the commercial product is gone and the repository's release cadence has since stalled, reflecting residual open-source interest rather than a live platform.

• https://api.github.com/repos/whylabs/whylogs recorded 2026-08-13

  stargazers_count = 2830 for whylabs/whylogs, with pushed_at 2025-01-10T20:14:49Z. No download, install or customer figure exists for this product, the hosted platform having shut down.

• https://github.com/whylabs/whylogs recorded 2026-06-04

  2.8k stars, latest release v1.6.4 (Dec 3, 2024)

WhyLabs is a pair of monitoring libraries, not a full tracing, evaluation and prompt platform: whylogs profiles data for drift, and LangKit adds LLM safety metrics such as toxicity and prompt-injection detection. Both have been unmaintained since the company shutdown, with no tracing backend or prompt-management surface, leaving it well behind Langfuse.

• https://github.com/whylabs/whylogs recorded 2026-08-13

  README describes a data-logging and profiling library with integrations for AWS S3, Apache Airflow, Apache Spark and MLflow, designed to run "typically in a distributed environment, such as Ray or Apache Spark". There is no tracing backend, prompt-management or eval-experiment surface in it. The repository's last push was in January 2025.

• https://pypi.org/pypi/langkit/json recorded 2026-09-29

  PyPI metadata for langkit: "Apache-2.0" with the classifier "License :: OSI Approved :: Apache Software License"; summary "A language toolkit for monitoring LLM interactions" listing "sentiment analysis" and "toxicity analysis" and "prompt injection".

• https://pypi.org/pypi/whylogs/json recorded 2026-09-29

  PyPI metadata for whylogs 1.6.4 released 2024-12-03 with summary "Profile and monitor your ML data pipeline end-to-end"; the latest release is that one, so the library has had no newer release. Searched the description for tracing backend and prompt management: none.