Symulate

Symulate

Build complete UIs before your backend exists

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Frontend devs know the pain: You have a great UI idea, but you're blocked waiting for backend APIs. Symulate changes that. Define your API endpoints in TypeScript, and get instant AI-powered mock data that feels real. Build your entire UI, demo it to stakeholders, gather feedback, and iterate, all before writing a single line of backend code. Once the backend is ready, change one configuration to use it. No wasted code. Stop waiting. Start building.
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Symulate gallery image
Symulate gallery image
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Launch tags:API•Prototyping•Developer Tools
Launch Team / Built With
Anima Playground
AI with an Eye for Design
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What do you think? …

Emilio Irmscher
Maker
📌
Hi Product Hunt! I'm Emilio, creator of Symulate. I built this because I was tired of this cycle: great UI idea → blocked by backend → wait 2 weeks → finally code → realize the API doesn't match what the UI needs → repeat. Symulate flips this. You define your endpoints in TypeScript right in your frontend code, and instantly get working APIs with realistic data. No backend team needed (yet). What makes this different from other mock tools: - AI generates contextually relevant data (not just random strings) - Export perfect OpenAPI specs from your frontend definitions - Unlimited testing in CI/CD with Faker mode (zero cost) - No Symulate infrastructure in production, just HTTP requests I've been using this myself for months, and it's changed how I build products. Would love to hear what you think! Try it free (20K AI tokens): https://symulate.dev Happy to answer any questions!