Keygen Alternatives (January 2026)

Software Licensing and Distribution API - Keygen

Keygen is a powerful software licensing API for desktop apps, on-premise software and other software products written in C++, C#, Swift, Java, Kotlin, Node and more.

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Cryptlex | Software Licensing

https://cryptle

.com/

Easily generate license keys and validate them in your software apps. Additionally, you can offer trials, subscriptions, node-locked licenses, floating licenses, offline licenses and much more.

WorkOS — Your app, Enterprise Ready.

https://worko

.com/

Developer APIs / SDKs for enterprise-ready features like Single Sign-On (SSO/SAML), Passwordless Authentication, Directory Sync (SCIM), Audit Trail (SIEM), and more. Get started for free.

Rocket Lawyer APIs | Elevate your platform. Empower your customers.

https://www.rocketlawye

.com/developers/

From signing to filing, it's never been easier or more affordable to engage customers with API toolkits from the leader in online legal services.

Fidel API - One API for linking bank cards to applications, globally

https://fidelap

.com/

Power your applications with real-time payment data. Build innovative card-linking applications by connecting Visa, Mastercard and Amex cards to loyalty and marketing services all in one place.

PDF Generation API - Automated Document Generation | DocuGenerate

https://www.docugenerat

.com/

Automatically generate high-quality PDF documents from reusable Word templates and JSON or Excel data with DocuGenerate’s API and web app · Start Generating for Free

DreamFactory | Code Automation for Generating REST APIs

https://www.dreamfactor

.com/

Instantly generate APIs from any database with built-in enterprise security controls that operates on-premises, air-gapped, or in the cloud.

Apryse - Document processing technology for developers | Formerly known as PDFTron

https://aprys

.com/

Integrate document processing capabilities into any software applications. Generate, convert, view, edit, and sign pdf and documents easily.

APIMatic - Build and Maintain SDKs and docs for Your API | APIMatic

https://www.apimati

.io/

The Trusted Developer Experience platform for APIs. Achieve faster API onboarding via automatic SDKs, docs, code samples, and guided walkthroughs.

FusionAuth: Auth. Built for Devs, by Devs

https://fusionaut

.io/

The easiest way to add authentication and user management to your application. API-first & purpose-built for developers. Get started for free.