fx0

I built and managed fx0 between February 2025 to September 2025.

Take some time and read Story Behind this project :D

Overview

fx0 was a fast, minimal and unified AI chat application which routes multiple models into one place. It lets you access various models from different providers through a single web UI. Instead of paying for multiple AI subscription, you can use fx0 to access all of them in one place.

What I Worked On

• AI routing and multiple model and provider integration and support
• Building a web UI and dashboard for all the models and providers
• Building a single subscription layer and payment system for the users to access the models
• Building a simple and fast chat interface with history and context support for the users to interact with the models

Tech Stack

• Next.js
• TypeScript
• MongoDB
• Node.js
• Tailwind CSS and other component libraries

Challenges and Learning

• One of the main challenges I faced was integrating multiple AI models from different providers, each with its own API and authentication methods. I had to ensure that the routing logic was efficient and that the user experience remained seamless despite the complexity behind the scenes.
• Another challenge was implementing a single subscription layer and payment system that could handle different pricing models and billing cycles. I had to research and implement a solution that was both secure and user-friendly.

Previews

Video previews

• Preview Video 1

• Chat experience 1

• Chat experience 2

• Chat interface preview

• Landing page

  

Story Behind

I was early on this project idea. Back when @theo's t3.chat didn't exist. But my time for execution and focus was limited. I had a lot of ideas and wanted to build something that would make AI more accessible to everyone. I wanted to create a platform where users could easily switch between different AI models without having to manage multiple subscriptions or interfaces. But after theo released t3.chat, I was glad someone had a similar idea and executed it well. Soon I dropped the project and started working on other things. This is just a small showcase and archive of what I built and managed during that time.