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Licensing.

Localization OS is open source under the Apache 2.0 license. The core is complete and free.

The license#

Localization OS is open source: its code is released under the Apache 2.0 license. You can run it, change it, and use it commercially, on your own servers, with no per-word meter running underneath. The documentation is licensed CC BY 4.0. The code is public at github.com/patois-labs/localization-os.

The core is complete. It includes SSO (OIDC, SAML, LDAP), SCIM, the audit chain, accessibility, Queries, all 28 connectors, the MCP server, and PII redaction including name detection. There are no artificial limits in the core: no seat caps, no volume caps, no feature timers.

Paid add-ons#

A narrow set of advanced features is sold separately, on top of the free core:

  • Advanced Workflows: the agent-based tier, with web verification.
  • Evaluations Lab: a sandbox for measuring translation quality.
  • Semantic translation memory.
  • Databricks export.
  • LLMemory: memory that improves itself over time.
  • Enterprise infrastructure adapters: OpenTelemetry tracing, Prometheus metrics, and S3 storage.

Everything else is free. Talk to us about the add-ons; there is no public price list.

Our promise#

  • Nothing that is free ever becomes paid.
  • SSO, SCIM, the audit chain, accessibility, and security fixes are always free.
  • Paid add-ons may join the free core later, never the other way around.
  • The core never depends on a paid add-on.

Services from Patois Labs#

Patois Labs is the company behind Localization OS. You can run it entirely yourself, or ask us to help. We offer:

  • Managed single-tenant hosting.
  • Private or local AI on your hardware or ours, so nothing leaves the building.
  • Custom features and integrations.
  • Configuration packages.
  • Support for teams that self-host.
  • Compliance and procurement help: VPAT, HECVAT, and security questionnaires.

Contributing#

Contributions are welcome. We use the Developer Certificate of Origin (DCO): you sign off each commit to confirm you have the right to contribute it. There is no contributor license agreement to sign.

Notices and trademarks#

Localization OS is built on other openly licensed software. The packages, their licenses, and their credits are listed in the third-party notices.

The Apache 2.0 license covers the code, not the names. "Localization OS" and "Patois Labs" and their logos are trademarks of Patois Labs, LLC. You are free to fork and modify the code; please do not present a modified version as the official Localization OS.

Talk to us#

For add-ons, hosting, or services, the next step is a conversation, not a price list on this page.

Schedule a technical walkthrough →

or email brent@patoislabs.com with questions.