ActiveState Platform vs tox

ActiveState Platform hosts custom runtimes assembled from source. Projects specify runtime components, preserve project history and provide deployment instructions; their artifacts may include packages, dependencies, patches and bundles, but not contributors’ first-party code. Create projects in the web interface or with the State Tool CLI, then deploy and activate them locally. Projects can remain personal, be shared with an organization or be public. The platform supports Windows, macOS and Linux deployments, and its GraphQL API can build open-source software for different operating systems and languages without requiring users to manage build infrastructure. It provides immutable SBOMs in SPDX formats and describes build safeguards including reproducible builds, checksum checks and isolated containers. A free organization plan costs nothing and is limited to public projects. Curated Catalog annual pricing is $25,000 for fewer than 100 employees, $50,000 for 100–999 employees and $150,000 for 1,000 or more; those prices do not apply to legacy Platform subscriptions.

tox is a free, open-source command-line tool for creating virtual environments, checking package builds and installations across different environments, and running tests in them. It can orchestrate test runners, linters, formatters, documentation generators, and build or publishing tools. As a continuous-integration frontend, tox combines CI workflows with shell-based testing and reduces boilerplate. Configuration can be stored in tox.toml, tox.ini, pyproject.toml, or toxfile.py. By default, it removes host environment variables unless allowed through pass_env and adjusts PATH so commands use the active environment. The command-line tool requires Python 3.10 or higher. Installation guidance covers pipx, uv, and pip, with apt and brew package-manager routes also documented. Plugins include tox-gh-actions for GitHub Actions, tox-uv for faster package installation, and tox-gh for enhanced GitHub integration. It runs on Linux, macOS, and Windows and is maintained as a volunteer open-source project.