Yes, you can use your FusionAuth licenses across multiple environments, but you should use the appropriate license type for each:

License Structure

In your account portal at account.fusionauth.io, you should see two licenses:

Production License — use this for your production environment only Non-Production License — use this for your dev and staging environments Best Practice Deploy the Non-Production license to your dev and staging instances Deploy the Production license to your production instance

Both licenses can be active simultaneously across different deployments without conflict. The license key itself is tied to your account and does not interfere with your managed FusionAuth Cloud setup when used in self-hosted deployments.

Important Notes

The non-production license can be used across as many non-production environments as you need — dev, staging, QA, UAT, CI/CD, or even individual developer local instances. There's no limit on the number of instances using the non-production key.

Do not use the production license on non-production environments — this would cause test logins to count toward your Monthly Active Users (MAU) and affect your billing.

License costs are not based on the number of instances — whether you have 1, 2, or 100 instances, the license cost is related only to your plan tier and MAU count.

Using self-hosted licenses won't affect your FusionAuth Cloud deployment — the licenses operate independently, so activating your license keys on self-hosted instances will not disrupt your existing managed environment.

Related Documentation Licensing Documentation — Overview of FusionAuth licensing concepts License FAQ: Non-Production Licenses — Details on using licenses for dev/QA/UAT servers License FAQ: Multiple Deployments — How license costs work with multiple instances Account Portal Documentation — Where to find your license keys Cloud vs Self-Hosted — Comparison of hosting options

First, ensure your instance meets the requirements outlined here. In particular:

When using the Advanced Threat Detection feature, a minimum of 2GB of heap is required, and 3GB is recommended.

You also need to make sure the instance has outbound network access.

If this doesn't work, please open a support ticket.

You’ll find your license Id on your account portal. Once you have that value, you can paste it into the FusionAuth instance to activate the license.

You should find your license on your account page, which you can log into here: https://account.fusionauth.io/

Here is a guide on activating your license: https://fusionauth.io/docs/v1/tech/reactor/

We have a license FAQ.

If course, if your questions aren't answered there, please feel free to send us an email.

Hiya,

Unless you want to use the premium features of FusionAuth, this usage would be allowed under the FusionAuth license and you could use the community edition to host it for free.

Here's a license FAQ that hopefully makes things more clear.

You should read the FusionAuth license, or, rather, have your employers do so.

We've also created a license FAQ which answers common questions about FusionAuth usage. I think this is the relevant section:

I sell downloadable software that contains FusionAuth. What type of license do I need?

And the answer:

You will need a reseller license for FusionAuth in order to resell it to your customers. This license is usually charged per customer rather than per monthly active user. You should contact our sales team to discuss licensing options. They can be reached at sales@fusionauth.io.

Actually, as of when I write this post, we have two license keys available for anyone with a paid edition. One is a prod license and the other is a non prod license. The latter is a good fit for testing, CI, etc.

You'll need to be on version >= 1.15.0 to enable to enter the license code.

Hiya,

I got an answer for you about sunset provisions.

We have discussed source code escrow options with clients in the past. We can also offer a source code release clause (in the event FusionAuth goes out of business). However, these are only options if you are on an Enterprise plan with a custom contract.

Hope that helps you make the right decision for your application(s).