TestStacks - validate your business idea

What it does

Are you a start-up entrepreneur? Why not give your next idea the best possible chance of success by using experiments to validate your idea before you invest endless time and money... Simply choose a stack of experiments and get started.

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  Proofbase2023 · ▲96

  Build and manage lean start up experiments

• IA
  I accidentally built a startup idea validation tool2025 · validationly.com · ▲15

  I was working on validating some of my own project ideas. While trying to find how to validate my idea, I realized the process itself could be turned into a tool. A few late nights later, I had something that takes any startup idea, fetches discussions, summarizes sentiment, and gives a quick “validation score.” It’s very rough, but it works, and it’s already making me rethink a few of my own ideas. It's still a work in progress. I don't actually know what I'm doing, but I know it's worth it. Honest feedback welcomed! Live demo here: https://validationly.com/

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  IdeaScopeMar 2026 · ideascope.io · ▲17

  Validate startup ideas before you build

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  Free Business Idea Validation ToolSep 2025 · videodubber.ai · ▲2

  Test your startup idea | videodubber.ai

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  Startup Idea Validator2023 · ▲60

  Validate your startup idea in less than 20 seconds

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  Smoke Test Tool - Lean Research Toolbox2018 · ▲3

  Validate your business idea in just a few minutes!

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  Clipto MCP▲640

  Hey HN, We recently built Clipto. It’s a tool that lets you search over terabytes of video, audio, and images on your computer, without relying on the cloud. Motivation: we probably all had this similar experience, we know a moment exists in a video or audio, but finding it takes hours scrubbing the timeline. You can send all the media to process in the cloud, but it’s slow, expensive and raises privacy concerns. So we decided to build our own on-device media search engine. How it works (high level): 1. We ingest video, audio, image; normalize formats via ffmpeg; run content analysis to…

  Work · 23d ago · clipto.com

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  Computable GPU Index (CGI)▲426

  Hey we are Computable. We spent years building trading infrastructure at Jump Trading and Coinbase. From that point of view, compute looks like energy markets before 2000: everything trades through private bilateral leases, there’s no visible price, and nothing can be resold. The same H100 rents at a 2x spread depending on who’s asking, and once you sign a 24-month lease, it can never change hands. So we built a market for GPU nodes, sold by the calendar week. Here are three things you can do on it that you can’t do anywhere else: - Buy exactly the weeks you need. Three nodes for the last…

  Work · 15d ago · getcomputable.com

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  HyNote for Mac▲383

  Free local transcription that is 100% Private

  Work · 22d ago · hynote.ai

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  Scrimba Explain▲325

  Ask any question, get a video back instantly

  Work · 29d ago · scrimba.com

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  The New Calendly▲211

  Handle all of the work before, during, and after meetings

  Work · 22d ago · calendly.com

• RS
  Redbean – Single-file distributable web server▲1,998

  Life & fun · 2021 · justine.lol

• CT
  Can’t afford Bloomberg Terminal? No prob, I built the next best thing▲1,422

  Dev tools · 2021 · github.com

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  Ray.so▲1,064

  Create beautiful images of your code

  Dev tools · 2021 · ray.so

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  June 1.0▲851

  Instant analytics reports built on top of Segment

  Growth · 2021 · june.so

• 
  Contra▲798

  A new kind of professional network

  Commerce · 2021 · contra.com

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  Deep Nostalgia™▲767

  Animate your family photos

  AI · 2021 · myheritage.com