Symulate

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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  Hey HN, We built Ductape to make backend integrations reusable and environment-agnostic. You define the logic once (e.g. payments, auth, notifications) and externalize provider-specific stuff like API keys, endpoints, and retries into a config. That logic can then be reused across services, projects, and environments without rewriting code. It’s like decoupling your service logic from your infrastructure. You can even switch providers by changing config, not code. We’re using it to save time, reduce bugs, and simplify service expansion. Curious what you think. We’ve been building quietly and…

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