No. 19 of 37 ·ML Experiment Tracking Software

Oríon

Windows · Mac · Linux

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Freedom report

Two barsScore 5.5

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Oríon is ranked #19 of 37 in ML experiment tracking software on Freedom251. It runs on Linux, macOS, Windows.

Compared on ML experiment tracking software

Run comparison: Yes
Deployment options: self_hosted
API and SDK access: Yes

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The record

Purpose: Oríon is an asynchronous framework for black-box function optimization, designed for machine learning model and training tuning.
Workflow: It can tune command-line scripts with minimal changes to a researcher’s existing workflow.
Algorithms: The installation guide lists Random Search, Hyperband, TPE, and ASHA as included algorithms, with more available through plugins.
Search spaces: Oríon provides search-space definitions for parameters and supports configuration through command-line arguments or configuration files.
Integration: A script can report its optimization objective through Oríon’s Python client API.
Parallel execution: Oríon supports asynchronous parallel optimization, and its documentation describes Joblib and Dask worker backends.
Storage: The documented database backends are in-memory EphemeralDB, file-based PickledDB, and MongoDB.
Storage limit: The documentation says PickledDB is generally not suited to parallel optimization with more than 50 workers; MongoDB is recommended above that scale.
Visualization: The documentation includes experiment visualizations such as regret curves, parallel coordinates, local parameter importance, and partial dependencies.
Installation: Oríon is installed from PyPI with pip install orion.
Platforms: The installation guide says Oríon is compatible with most Linux distributions and Mac OS X, and supports Windows 10 through Windows Subsystem for Linux.
Support: The project directs questions, bug reports, and feature suggestions to its GitHub issue tracker.
License: The project documentation says Oríon is licensed under the BSD license.

Where it ranks on Freedom251

Best ML Experiment Tracking Software in 2026#19 of 37

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Sources

orion.readthedocs.io/en/stable/· checked 4 Oct 2026
orion.readthedocs.io/en/stable/install/core.html· checked 4 Oct 2026
orion.readthedocs.io/en/stable/user/searchspace.html· checked 4 Oct 2026
orion.readthedocs.io/en/stable/install/gettingstarted.html· checked 4 Oct 2026
orion.readthedocs.io/en/stable/user/parallel.html· checked 4 Oct 2026
orion.readthedocs.io/en/stable/install/database.html· checked 4 Oct 2026
orion.readthedocs.io/en/stable/user/overview.html· checked 4 Oct 2026