Best HNN Alternatives & Competitors in 2025

Lo-Dash is a drop-in replacement for Underscore.

Key Lo-Dash features:

Performance Consistency Modularity Community and Support

Open Source

Raven.js is a standalone JavaScript client for Sentry.

Key Raven.js features:

Integration with Sentry Automatic Error Logging Customizable Metadata Source Map Support

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)

A framework for building native apps with React.

Key React Native features:

Cross-platform development Performance Community support Hot reloading

Open Source

A PHP full-stack web framework.

Key Symfony features:

Robust Framework Modular Architecture Community Support Scalability

Underscore is a utility-belt library for JavaScript that provides a lot of the functional...

Key Underscore.js features:

Utility Functions Consistency Lightweight Browser Compatibility

Open Source

ReactiveX is a library for composing asynchronous and event-based programs by using observable sequences.

Key ReactiveX features:

Asynchronous Programming Composability Error Handling Backpressure Handling

Open Source

Babel is a compiler for writing next generation JavaScript.

Key Babel features:

JavaScript Version Compatibility Future-Proof Code Ecosystem and Plugins Integration with Modern Development Tools

Open Source

D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS. .

Key D3.js features:

Powerful Visualization Data Binding Community and Ecosystem Flexibility

Open Source

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

FACTORIE is a toolkit for deployable probabilistic modeling, implemented as a software library in Scala.

Open Source

DataTables is a plug-in for the jQuery Javascript library.

Key DataTables features:

Feature-Rich Easy to Use Extensible Cross-platform Compatibility

Open Source

Composer is a tool for dependency management in PHP.

Key Composer features:

Dependency Management Autoloading Version Control Community Support

Open Source

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