A YC-backed (S24) iOS app that generates personalized video courses on any topic — short explainer videos rendered with Remotion and Manim, plus Duolingo-style games to reinforce them.
Last verified · 2026-08-11 · by Moe Ameen
Keet is an iOS app that turns a topic you type into a full course. It generates a structured roadmap of bite-sized lessons, each pairing a short explainer video with interactive games — multiple choice, swipe, order, connections, and custom formats — so you are actively quizzed instead of passively watching. You can set the depth, complexity, and narration style when you create a course. The idea is that a personalized, sequenced course beats trying to self-teach from scattered YouTube videos, articles, and chatbot threads. It launched publicly with a Launch HN post on August 11, 2026.
Keet is built by Zack Ashen and Tommy Tsai, Cornell CS graduates in New York City, as part of Y Combinator's Summer 2024 batch. Its most notable engineering choice is how the videos are made: rather than using expensive AI video models, the founders said Keet renders course videos programmatically — with Remotion (React-based video) for process animations and primary-source material, and Manim, the animation engine popularized by 3Blue1Brown, for math-heavy content. That keeps the explainers clean, consistent, and cheap to generate.
It is important to be clear about what Keet is *for*. It is a personal learning product — the user is the student, and the output is a course you consume inside the app. It has no audience, brand, export, captioning, or publishing features, because none of that is its purpose. As of 2026-08-11 it is in private beta on iOS via TestFlight; early sign-ups get a couple of free courses, after which the plan is a Suno-style monthly subscription that grants credits to generate more.
Keet is not a content tool, so the honest bridge is not "publish Keet's output" — you cannot, its courses live inside the app for the learner. The real connection is upstream: Keet is a fast way for a creator to *learn* a subject cold, and [Kompozy](/) is how you then *teach* it to an audience. Use Keet to build genuine command of a topic — the roadmap, the explainers, the quizzes that make it stick — and once you actually understand it, bring that expertise into Kompozy to turn it into a published content series. That "learn here, publish there" loop is the useful workflow, and it plays to each tool's real strength instead of pretending they compete.
Inside Kompozy the topic you just learned becomes a body of on-brand content, not a private course. It is a full generation and multi-platform publishing engine, so one subject fans into a self-narrated [Persona Short](/glossary/persona-shorts) explaining a single idea, a [Carousel Post](/glossary/hyperframes) breaking down the steps, quote cards and infographics rendered brand-exact through [HyperFrames](/glossary/hyperframes), and a blog post and newsletter — all governed by your [Persona Brief](/glossary/persona-brief) so they sound like you rather than generic AI. You review each piece, then [Autopilot](/glossary/autopilot) schedules and publishes it across the eight social platforms plus blog and email. Keet gives you the understanding; Kompozy gives that understanding an audience.
Keet is a Y Combinator (S24) iOS app that generates personalized video courses on any topic — a roadmap of short explainer videos paired with Duolingo-style games. It is built for learning topics yourself, not for producing content for an audience.
The founders said Keet renders course videos programmatically with Remotion (React-based video) and, for math, Manim — the engine popularized by 3Blue1Brown — rather than generating them with AI video models. That keeps the explainers clean and cheap.
No. Keet's courses are built for the learner inside its app; there is no export, captioning, or publishing feature. If you want to turn a topic into audience-facing content, a publishing engine like Kompozy generates and distributes it across platforms.
As of 2026-08-11 Keet is in private beta on iOS via TestFlight. Early sign-ups get a couple of free courses, after which the plan is a Suno-style monthly subscription granting credits to generate more. Pricing is not finalized.
Use Keet to quickly learn a subject, then bring that expertise into Kompozy to turn it into a published content series — Persona Shorts, carousels, quote cards, a blog, and a newsletter, scheduled across the eight social platforms plus blog and email. Learn in one, teach in the other.