Prexist

What it does

Validate your startup idea in seconds. Prexist searches 8 platforms like Product Hunt, Y Combinator, GitHub, Crunchbase & App Stores (iOS and Android) using AI to find similar products — all in one place. Save weeks on research and build smart. 🚀

Validate your product idea across multiple platforms in seconds.

Prexist scans the products that already exist, then returns direct evidence so you can focus on angle, differentiation, and execution. Be specific about the audience, workflow, and constraints. Better input gives more accurate market overlap. Minimal interface, high-information output. Every interaction is designed to move from vague idea to concrete market context in one pass. Understands the core product concept and breaks the idea into searchable dimensions. Searches startup, app, code, and web ecosystems where overlapping products actually appear. Groups results by platform so you can compare what exists and where the opportunity is. Reduces blind spots before investing time in design,…from prexist.pages.dev

In the maker’s words, at launch

Hey HN I built Prexist, an AI-powered tool that helps founders, PMs, and VCs quickly find out if their startup idea already exists, across 8 major platforms like Product Hunt, YC, GitHub, Crunchbase, and the App Stores. Until recently, running searches across all these platforms in parallel took ~60 seconds. We’ve…

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