Compare tools side by side · TechInTrends

Open-source suite for experiment management, orchestration, data management and model serving.

Open-source platform for experiment tracking, model registry and deployment, now with GenAI tracing and evals.

Weights & Biases

Hosted experiment tracking, sweeps, artifacts and Weave LLM tracing; owned by CoreWeave.

Define-by-run hyperparameter optimization framework with pruning and a dashboard.

Head to head

Metric	ClearML	MLflow	Weights & Biases	Optuna
Stars	6.9k	28.7k	11.3k	15k
Weekly downloads	170k	5M	4.5M	3.2M
Download growth	-13%	+5%	+36%	-8%
Popularity score	67/100	82/100	78/100	78/100
Forks	815	6.6k	914	1.5k
Open issues	519	2.2k	1k	26
Last commit	1w ago	2d ago	2d ago	1w ago
Latest version	2.2.0Nov 3, 2026	3.18.0Nov 3, 2026	0.31.0Oct 16, 2026	5.0.0Sep 7, 2026
License	Apache-2.0	Apache-2.0	MIT	MIT
First released	2019	2018	2017	2018
Signals	None	Popular	Popular	None
Listed in	AI & Machine Learning › MLOps & Experiment Tracking	AI & Machine Learning › MLOps & Experiment Tracking	AI & Machine Learning › MLOps & Experiment Tracking	AI & Machine Learning › MLOps & Experiment Tracking

Weekly downloads over time

Hover for exact values; switch to log scale for tools of very different sizes.

ClearML
MLflow
Weights & Biases
Optuna