Best AJS Alternatives & Competitors in 2025

OpenUI5 is an open source JavaScript UI library maintained by SAP.

A framework for building native apps with React.

Key React Native features:

Cross-platform development Performance Community support Hot reloading

Open Source

As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more.

Key DocRaptor features:

Ease of Use Customizable High-Quality Rendering Compliance

Try for free paid Free Trial $15.0 / Monthly (125+ Documents)

The Write Less, Do More, JavaScript Library.

Key jQuery features:

Ease of Use Cross-Browser Compatibility Large Community and Ecosystem Animation and Effects

Open Source

Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications.

Key Node.js features:

Asynchronous and Event-Driven JavaScript Everywhere Large Community and NPM High Performance

OpenSSL is a free and open source software cryptography library that implements both the Secure Sockets Layer (SSL) and the Transport Layer Security (TLS) protocols, which are primarily used to provide secure communications between web browsers and ….

Key OpenSSL features:

Open Source Widely Used Comprehensive Documentation Regular Updates

Open Source

Classy web-development dressed in a DSL.

Key Sinatra features:

Lightweight Simplicity Quick to Set Up Flexibility

Open Source

The Web framework for perfectionists with deadlines.

Key Django features:

Rapid Development Scalability Security ORM (Object-Relational Mapping)

Open Source

A JavaScript library for building user interfaces.

Key React features:

Component-Based Architecture Virtual DOM Strong Community and Ecosystem JSX Syntax

Open Source

Apache OFBiz is a set of applications designed for businesses.

Key Apache OFBiz features:

Open Source Comprehensive Suite Modular Architecture Customizability

Open Source

AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.

Key AngularJS features:

Two-way data binding Dependency Injection Modular Development Community and Ecosystem

Ruby on Rails is an open source full-stack web application framework for the Ruby programming...

Key Ruby on Rails features:

Rapid Development Community Support Convention over Configuration Built-in Testing

Open Source

HTML5 Widgets & SPA Framework for Desktop and Mobile.

Key DevExtreme features:

Comprehensive Widget Library Cross-Platform Compatibility Rich Data Visualization Responsive Design

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Key Flagsmith features:

Feature Flags Remote Config A/B/X Testing & Optimization Organization Management

Try for free Open Source freemium