Best API Products in 2025

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.

Key Insomnia REST features:

User-Friendly Interface Support for Multiple Protocols Environment Management Custom Plugins and Themes

Open Source

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

Real-time notifications on your Android, iPhone, iPad, and Desktop.

Key Pushover features:

Cross-Platform Support Simple Integration Reliability Customizability

paid Free Trial $5.0 / One-off

Pushbullet - Your devices working better together.

Key Pushbullet features:

Cross-Platform Synchronization Easy File Sharing Universal Copy and Paste Notification Mirroring

Save 2-4 weeks / 90% of the code building web apps by automating API integrations and security.

Key WunderGraph features:

API Integration GraphQL Support Type Safety Real-time Capabilities

Open Source

High performance AI models, ready for production, served through a REST API. Fine-tune and deploy your own models. Easily use generative AI in production.

Key NLP Cloud features:

Affordable Pricing Variety of Models Customization Ease of Integration

freemium

a simple self-hosted server for sending and receiving messages.

Key Gotify features:

Open Source Self-Hosting Capable Real-Time Notifications Web UI and API

Open Source

Join is a marketplace for influencers and advertisers to collaborate.

Key Join features:

Comprehensive Marketing Tools User-Friendly Interface Scalability Analytics and Reporting

The Collaboration Platform for API Development.

Key Postman features:

User-Friendly Interface Collaboration Comprehensive Testing Tools Extensive API Documentation

Open Source

AirMore is a cross-platform toolset that can help you manage any Android device wirelessly.

Key AirMore features:

Ease of Use Wireless Connectivity Cross-Platform Compatibility File Management

Access Android phone/tablet from computer remotely and securely. Manage SMS, files, photos and videos, WhatsApp, Line, WeChat and more on computer.

Key AirDroid features:

Cross-Platform Support Remote Access File Transfer Notification Mirroring

freemium

Turn your code into a business with hosted and monetized APIs.

Key Byvalue features:

Sustainability Focus User-Friendly Interface Collaborative Community Resource Library

Integrate Android with the KDE Desktop.

Key KDE Connect features:

Cross-Platform Compatibility Feature-Rich Open Source Easy Setup

Paw is a REST client for Mac.

Key RapidAPI for Mac features:

User Interface Team Collaboration Advanced Request Capabilities Extensions and Plugins