Keygen is now Fair SourceStar us on GitHub

Use Cases
- Software Application LicensingUse Keygen's flagship software licensing API to add license key validation, device activation and entitlements to any software product.
- Software Artifact DistributionUse Keygen's supplementary software distribution API to securely deliver artifacts and offer automatic updates to licensed users.
- No-code Licensing AutomationUse Zapier to integrate Keygen with your favorite tools, such as Stripe for payments, and Postmark for transactional emails. No code required.
- For On-Premise/Multi-Prem
- For Go Programs
- For Mac Applications
- For Container Images
- For Windows Programs
- For Electron Apps
- For WordPress Plugins
- For Tauri Apps
- For Python Packages
- For PHP Packages
- For Node Packages
- For RubyGems
Demos
Developers
- Self-Host Keygen NEWLearn how to self-host Keygen's Community Edition for free, or self-host our Enterprise Edition for your business.
- Developer CLIUse Keygen's official CLI to sign and publish software releases. Integrate with our SDKs for secure automatic upgrades.
- Documentation
- API Reference
- Changelog
- Security
- Source Code
Resources
- Read the Source Code NEWKeygen is an Fair Source software licensing and distribution API. View the source code on GitHub to learn more. Build vs BuyBusinesses of all sizes face the question of whether to build or buy a licensing solution.
- Open Source
- Fair Source
- Affiliate Program
- Careers
- Blog
- Get Support
Pricing
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Keygen vs Flexera

If you're looking for a simple and modern alternative to FlexLM, then Keygen is the product just for you.

Pioneering a modern licensing solution

Don't settle for legacy systems like FlexNet. Keygen has been a pioneer in the licensing space since 2016. Our goal is to provide modern APIs for licensing, built for developers by developers.

Learn about licensing

Everything you need to license your software products

Use Keygen's modern software licensing APIs to implement a variety of licensing models, from perpetual licensing to concurrent licensing and beyond. No USB dongles required.

View our docs

Simple and affordable pricing

Don't pay for enterprise buzzwords. Keygen offers a modern set of software licensing services for a fraction of the price, making us an affordable choice for developers, startups, SMBs, and enterprises alike.

View our pricing