MLflow vs ClearML
Both are alternatives to Weights & Biases. Here's how they stack up — verified facts, no spin.
Also searched as ClearML vs MLflow — same comparison, one verdict.
MLflow
TOP PICKThe open standard. Tracking, registry, projects and deployment in one.
MLflow is the most widely adopted open ML platform, and its scope is why: experiment tracking, a model registry with stage transitions, reproducible project packaging and deployment tooling, all Apache-2.0. It runs as a local file store for one person or as a server with a database and object store for a team, integrates with essentially every framework, and is supported natively by every major cloud — so it is the option least likely to become a dead end.
ClearML
The most complete open platform — tracking, orchestration and data together.
ClearML goes furthest in scope of the open options: experiment tracking, pipeline orchestration, remote task execution on a compute cluster, dataset versioning and model serving, in one Apache-2.0 platform. Its automatic-logging is unusually thorough, capturing arguments, environment and outputs with almost no instrumentation. If you are replacing several tools rather than one, this covers the most ground, at the cost of being the heaviest to deploy.
Side by side
| MLflow | ClearML | |
|---|---|---|
| Sovereignty Score | 93 | 90 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first | Yes | Yes |
| License | Apache-2.0 | Apache-2.0 |
| Pricing | Free, Apache-2.0. Managed versions are sold by the clouds if you want one. | Free self-hosted, Apache-2.0; a hosted tier with paid plans is also offered. |
MLflow is Macrostack's recommended Weights & Biases alternative, so it's our pick here.
MLflow
Strengths
- +Covers tracking, registry, packaging and deployment — not just tracking
- +The de facto standard; integrated with every major framework and cloud
- +Scales from a local directory to a full server deployment
- +Apache-2.0 with unlimited seats
Trade-offs
- −UI is functional rather than pleasant, and slows on very large run counts
- −Team deployment means running a server, a database and object storage
- −No built-in sweep orchestration comparable to W&B's
ClearML
Strengths
- +Broadest scope — tracking, orchestration, data and serving
- +Automatic logging captures almost everything without instrumentation
- +Remote execution on your own compute cluster
- +Apache-2.0 self-hosted with no seat limit
Trade-offs
- −Heaviest deployment of the group
- −Breadth means more concepts to learn before it is useful
- −Some conveniences are nudged toward the hosted tier
Related alternative guides
Facts verified 2026-08-11. Licenses and pricing change — spotted something out of date? That's a correction we want.