Best Open Source Alternatives to Weights and Biases

Compare the best free and open-source alternatives to Weights and Biases — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 3 alternatives

Weights and Biases

Proprietary SaaS

Weights and Biases alternatives compared

Open-source alternatives to Weights and Biases, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Latitude	4,744	MIT	DockerLinux	Yes	Nov 2026	Visit
OpenLIT	2,902	Apache-2.0	Web	No	Nov 2026	Visit
mlop	394	Apache-2.0	Web	No	Mar 2026	Visit

Top open-source Weights and Biases alternatives

Latitude4,744MIT

Latitude is an open-source AI agent observability platform replacing LangSmith with self-hosted ClickHouse tracing and automated agent fix loops.

DockerLinux

vs Weights and Biases: a free, open-source option you fully control, licensed MIT.

Visit

EasyP

Promoted

The modern standard for Protobuf workflows

Lint, codegen, breaking-change checks and dependency management in one Git-native CLI. Open source, no registry lock-in.

lintgeneratebreakingeasyp.lock

go · ts · java generated

$ easyp breaking

backward compatible

OpenLIT 2,902Apache-2.0

OpenLIT is an open-source alternative to LangSmith providing self-hosted OpenTelemetry tracing, cost tracking, and GPU metrics for AI applications.

Web

vs Weights and Biases: a free, open-source option you fully control, licensed Apache-2.0.

Visit Details

mlop394Apache-2.0

mlop is an open-source, self-hosted alternative to Weights and Biases for ML experiment tracking, featuring a high-throughput Rust ingestion engine.

Web

vs Weights and Biases: a free, open-source option you fully control, licensed Apache-2.0.

Visit Details