Keygen Alternatives (January 2026)

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.

4.9/5

175+ reviews

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1.
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.

2.
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.

3.
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.

4.
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.

5.
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

6.
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.

7.
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.

8.
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.

9.
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.