
Symulate
Build complete UIs before your backend exists
Symulate launched on November 6, 2025 with 8 votes, #1,383 of 9,796 launches that month and more than 50% of that year's launches. The site was not reachable when checked in September 2026.
What it does
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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