Lengthen.ai

AI Video Generation SaaS Platform

A professional AI-powered video generation platform that turns ideas, memes, text, or images into full-length videos in seconds with no duration restrictions.

Timeline

Spring 2025 - Present

Team

Clashware

Impact

Democratized AI video generation for a global audience.

Project Overview

Lengthen.ai is an AI video generation platform that converts text, images, and memes into full-length videos without duration limits. Built with Next.js, the platform integrates multiple AI models (Kling2, Veo3) for video creation. The technical stack includes Stripe for payments, Clerk for authentication, and Prisma for database management. A three-tier credit-based pricing system scales from free (100 credits) to professional tiers ($9-49/month) with features like watermark removal, priority processing, and commercial licensing.

Key Challenges

AI Model Integration

Seamlessly integrating multiple state-of-the-art AI models while maintaining consistent performance and quality across different video generation scenarios.

Scalable SaaS Architecture

Building a robust full-stack platform handling user authentication, payment processing, credit management, and real-time video generation at scale.

International Market Reach

Implementing comprehensive internationalization to serve global markets while maintaining SEO optimization and accessibility standards.

Business Model Optimization

Designing a sustainable credit-based pricing model with multiple tiers that provides value to users while ensuring platform profitability.

Key Features

Text, image, and meme to full-length video generation

No duration restrictions on video creation

Multiple AI models (Kling2, Veo3) for variety

Three-tier pricing (Free 100 credits, Standard $9/month, Pro $49/month)

Professional Full HD quality output

Credit-based system with rollover functionality

Priority processing and queue management

Watermark removal for paid tiers

Extended mode capabilities for advanced users

Commercial licensing for business use

Technologies Used

Next.js

TypeScript

Prisma

Clerk

Stripe

Tailwind CSS

AI Models (Veo2, Veo3, Kling2)

PostgreSQL

Vercel

i18n