PRO includes everything in open-source Centrifugo and adds features for scale, performance, security, observability and push notifications. The comparison above lists them side by side.

Yes. Started without a license key, Centrifugo PRO runs in sandbox mode with the full feature set — capped at 20 concurrent connections, 2 nodes and 5 API requests per second. It's meant for development and evaluation, not production. Learn more →

One flat, company-wide license key. It runs Centrifugo PRO with no limits on operations, connections or nodes, across many projects within your organization — including SaaS products you build on top of it. The key includes one year of prioritized support and updates. Licenses are available to companies and businesses only, not to individual consumers. The exact terms are in the Centrifugo PRO license agreement.

No. Pricing is flat and based on your company size — never on connections, nodes, or message volume, so costs track your company's growth rather than your traffic.

One key covers all your projects as long as Centrifugo PRO stays within your own company's infrastructure — including SaaS products you run. Installing it on a customer's own premises isn't part of the standard license, but it can be arranged when added explicitly to the agreement — reach out to discuss. Reselling the key or offering Centrifugo PRO itself as a hosted service are not permitted.

Centrifugo PRO keeps running forever, with no limits, after the key expires. A new key is only needed if you want to upgrade to a version of Centrifugo PRO released after your key's expiration date.

Centrifugo PRO is self-hosted and runs entirely on your own infrastructure. Messages and connection data stay inside your systems.

Smaller licenses can be paid online through Lemon Squeezy (part of Stripe) with a range of payment methods; larger ones via a signed agreement and bank transfer. A standard due-diligence (KYC) check applies before moving forward.

By default the purchase is covered by the standard Centrifugo PRO license agreement. For companies that need it, it can instead go through an individual agreement based on our MSA template. Custom legal adjustments are possible and may affect the final price.

Direct help with configuration, scaling and troubleshooting from the team that builds Centrifugo, along with updates throughout your license term.