
Problem Ledger
Validate startup ideas with evidence, not assumptions
What it does
After spending €50k on a product nobody paid for, I learned: validating a problem exists isn't enough. You need proof people will pay to solve it. Problem Ledger captures evidence while you browse. See someone complaining on Reddit? Save it. Read about a pain point? Capture it. Build proof a problem is real before investing time.
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- ISI started sharing 2 New Validated SaaS ideas every week2025 · validatedsaas.com · ▲8
I'm tired of seeing founders building stuff for months and years that nobody would ever pay for. They just don't see it, like most other founders learn to do. Business validation = making money, and nothing else really. If you really wanna make money this year, I can help you do it.
Validate.Then.BuildFeb 2026 · validatethenbuild.com · ▲3Have an Idea? We Build It — Equity, Not Cash.

- PAProblemHunt – A place to collect real problems before building startupsJan 2026 · problemhunt.pro · ▲5
Hi HN, I’m a solo founder. I built ProblemHunt after noticing a common pattern: many founders start with ideas and solutions, but don’t spend enough time understanding real problems. ProblemHunt is a simple place where people share problems they actually face in work or life. Developers and founders can browse these problems and use them as a starting point for building products. So far: – ~5,000 users – 150+ real problems submitted – 100% organic growth This is still early, and I’m trying to understand if this is genuinely useful. I’d really appreciate feedback: – Would you use something…
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Hey HN, Henry from Cactus here! We previously released Cactus Needle, a 14MB agentic LLM for tool call, device use, and structured extraction for phones, wearables, smart homes, small robots and microcontrollers. We got really great feedback here, and have now incorporated the suggestions to release Needle 2. The whole model is a single 14MB binary that runs a full session in 28MB of RAM; 45m parameters at 2bit compression. Needle hits 500 tokens/sec decode speed on a Raspberry Pi 5, sits between 400-1,500 tokens/sec on VR devices like Meta Quest 3S and Apple Vision Pro, and ranges…
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