Get Usapp

iOS App Android App Web App Desktop App

Features

End-to-End Encryption

All messages are encrypted with AES-256-GCM and ECDH key exchange. Your conversations stay private.

Real-Time Messaging

Instant message delivery powered by Socket.IO for seamless, real-time communication.

Secure Storage

Client-side encrypted storage using IndexedDB ensures your data is safe even locally.

Responsive Design

Beautiful, intuitive UI built with ReactJS and TailwindCSS that works on all devices.

JWT Authentication

Secure session management with JSON Web Tokens and HTTP-only cookies.

Advanced Security

Rate limiting, input validation, HTTPS everywhere, and regular key rotation.

Tech Stack

Frontend

ReactJS TailwindCSS Socket.IO Client IndexedDB Web Crypto API

Backend

NestJS PostgreSQL Redis Prisma ORM Socket.IO

Security

AES-256-GCM ECDH (Curve25519) JWT Key Rotation Rate Limiting

API Documentation

Base URL: https://api.usapp.com

Authentication: JWT Bearer Token or HTTP-Only Cookies

Rate Limiting: Enabled (varies by endpoint)

Available Endpoints:

  • GET /health - System health check
  • GET /status - API status and uptime
  • POST /login - User authentication
  • POST /otp/request - Request OTP verification
  • POST /otp/verify - Verify OTP code

About Usapp

Usapp is a secure, real-time messaging application designed for modern web platforms. Built with privacy and security as top priorities, every message is end-to-end encrypted using industry-standard cryptographic protocols.

Our platform leverages cutting-edge technologies to deliver fast, reliable, and private communication. With features like real-time delivery, encrypted storage, and regular security audits, Usapp ensures your conversations remain confidential.

Key Commitments:

  • End-to-end encryption for all messages
  • No message content stored on servers
  • Regular encryption key rotation
  • Open-source security practices
  • GDPR and privacy law compliance

Contact & Support

Have questions or need assistance? We're here to help!

Email: support@usapp.com
GitHub: github.com/usapp
Documentation: docs.usapp.com

Contributions and feedback are welcome!