Lovable vs Bolt vs v0 vs Massvai: Which AI App Builder for a Full-Stack Next.js App?

Comparing AI app builders, v0 and Massvai natively generate Next.js apps, while Bolt supports various frameworks and Lovable utilizes TanStack Start. Regarding AI video models, Google's Veo 3.1 excels in high-resolution single shots with 4K quality. Kuaishou's Kling 3.0 focuses on short stories with consistent elements and multi-shot clips. ByteDance's Seedance 2.0 serves as a reference-heavy option, processing text, images, video, and audio inputs to generate content based on specific user requirements.