Best 20+ AI Code Assistant to use in 2025

Open WebUI is a self-hosted artificial intelligence interface that lets you interact with language models on your own hardware. Think of it like ChatGPT, but running entirely on your computer or private server instead of in the cloud.

Katalon is a complete testing solution that automates the process of checking if software works correctly. Instead of testing applications manually every time, Katalon lets you create automated tests that run on their own.

Apidog is a platform that handles the complete process of creating and managing APIs. You can design your API structure, test how it works, create clear documentation, and share it with your team, all from one application.

HTTPie is a tool designed for testing APIs and HTTP servers with an easy-to-understand approach. You type commands that look similar to the actual HTTP requests you want to make, and HTTPie handles the technical details for you. The responses come back formatted with colors, making JSON and other data easy to read.

Testfully is a platform that helps developers test and monitor APIs during development and after deployment. You can use it to send requests to your APIs, create automated tests, and set up monitoring to catch problems before they affect users.

Hoppscotch is an API development environment that runs in your web browser. You can test any API by sending requests and viewing the responses instantly. Unlike traditional tools, Hoppscotch is completely free and open-source, meaning anyone can use it or even contribute to improving it.

Postman is an all-in-one platform for working with APIs throughout their entire lifecycle. It provides tools to send API requests, view responses, write tests, create documentation, and monitor performance. Unlike basic HTTP clients, Postman offers a complete environment where teams can organize their work into collections, share them with teammates, and automate testing.

Insomnia is a desktop application that lets you test and work with APIs. Think of it as a specialized tool for developers who need to send requests to APIs and check the responses they get back. It supports all major API types, so you don't need different tools for different projects.

Magic Patterns is an AI-powered design platform that turns your ideas into working user interfaces. You describe what you want in plain words, upload a screenshot, or even copy from a website, and it generates a complete design with real code.

Personal AI is a platform that creates personalized AI models using your own data instead of general internet information. When you upload your documents, emails, conversations, and other content, the system builds what they call a Personal Language Model that learns your specific way of communicating.