Thinking Line is an AI-powered studio for creating whiteboard animation and SVG-based explainer videos. It lets you generate and edit scenes in one place, with native animated charts, graphs, and cycles that draw themselves. You can search any topic and watch it become a narrated hand-drawn explainer. It offers a WebSocket API for developers, a voice library, and category-based video generation. Pricing includes a free tier, a Pro plan with premium AI voices and 4K export, and an enterprise option.