Understand your BEAM system.Instantly.

No. Voyager's source code is publicly available (source-available), but it is not open source under the OSI definition. Its use is governed by the Voyager License, which includes conditions not found in OSI-approved licenses.

The code is openly available, and individuals and small companies use it for free. To fund ongoing development and maintenance, larger for-profit organizations — those best able to afford it — pay for a Company License. This keeps the project maintained, updated, and healthy for everyone.

Functionally, nothing. It's the same program with the same code. A Company License is not a different product — it grants the right to use Voyager commercially above a certain company size, plus prioritized support scheme.

You are eligible for the Free License if you are:

• an individual (including for commercial use),
• a for-profit organization with up to 10 employees, or
• a non-profit or not-for-profit organization.

You can also use Voyager for free while still evaluating whether it's a good fit and not yet using it commercially, regardless of your size.

The 10-employee threshold counts everyone working for your organization, including part-time employees and contractors.

You can use Voyager as an internal working tool to deliver consulting or professional services to a client (e.g. analyzing or optimizing their infrastructure), provided that:

• only your own personnel use Voyager,
• the client gets no direct or indirect access to it,
• Voyager itself is not resold, hosted for, or made available to the client, and
• what you deliver is the results and work product, not Voyager or access to it.

Whether you need a Company License depends on your own company size, not the client's.

Yes, if it runs OTP 27 or later and Erlang distribution is enabled (a name and a cookie). Language does not matter: Elixir, Erlang, and Gleam are all supported. Need older OTP? Tell us what you run.

Yes. You may create public forks and modify the code to prepare contributions (pull requests) back to Voyager. What's not allowed is maintaining a fork as a separate, competing product, or selling/sublicensing your own derivative.

Yes, you may modify the code for internal use to fit your own use case. You may not sell, rent, license, or sublicense a derivative of Voyager, nor offer it as a hosted or "as-a-Service" product.

Yes. You can use Voyager for free while evaluating it, regardless of company size. Once you're no longer eligible for the Free License, the free evaluation period lasts 90 days — after that, if you're a for-profit organization above the size threshold and using Voyager commercially, you'll need a Company License.

Visit the contact page to request a Company License.

Once you cease to be eligible for the Free License, you have a 90-day period during which you can continue using Voyager for free — giving you time to obtain a Company License. You won't be in breach overnight.