echotest
2.5 million archetypes. One satisfying answer: will it work?
What it does
echotest simulates how 2.5 million digital personas — built from real census, economic — each carrying 60+ behavioral attributes including personality, cultural dimensions, and spending DNA— react to your product, pricing, and go-to-market strategy across 195 countries. Results in 12 -90 minutes. Not weeks. Not guesswork.
Does a similar job
all alternatives →- EFEcho – Fable-level results at 1/3 the cost using open-weight modelsJul 2026 · ▲484
I’ve been building Echo (https://echo.tracerml.ai/), an experiment in making one AI system out of a pool of open-weight models rather than choosing a single model and using it for every task. It started with a simple experiment. I took a group of models, including GLM-5.2, Kimi K2.7 and others, and ran them on the same evaluations. Then I measured what would happen if, for each problem, you somehow knew in advance which models would be useful and how their outputs should be combined. That hypothetical system performed substantially better than any individual model in the pool.…
BrandingStudio.aiMar 2026 · brandingstudio.ai · ▲177Agency-quality branding in 60 minutes, not 6 months
- AUAI User Persona Generator2024 · featuredgpts.com · ▲11
Let's be honest for a second. You hate doing user interviews You still want to get customer insights That's why we built this GPTs - AI User Persona Generator. So you can get incredible marketing insights from your ideal customers in 5 minutes (instead of 50 hours). You just need to provide your website or tell what your business is about. AI will handle the rest. Try it now https://chat.openai.com/g/g-SKdgK3Apk-ai-user-persona-genera...
- TATry Archetype 360 – AI‑powered personality test, 3× deeper than MBTIMar 2026 · archetype360.app · ▲10
Hi there, are you familiar with MBTI, DiSC, Big Five? Well I'm experimenting with a new kind of personality test, Archetype 360, and I'd love for you to try it for free and tell me what you think. - 24 traits across 12 opposing pairs -- that's three times more dimensions than MBTI or DiSC, so you get a much more nuanced profile. - A unique narrative report generated with AI (Claude), written in natural language instead of generic type blurbs. - Your role, goals, and current challenges are blended into the analysis, so the report feels relevant to your real‑life context, not just abstract…
More ai this month
the category →
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com
Astute▲585Automate your B2B brand going viral, with new media creators
AI · 19d ago · company-app.joinastute.com
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…
AI · 27d ago · cactuscompute.com
Launched alongside, April 2026
the whole month →
- AG
Thought the resources for GPU arch were lacking, so here we are
Life & fun · Apr 2026 · jaso1024.com
- IB
Built a ~9M param LLM from scratch to understand how they actually work. Vanilla transformer, 60K synthetic conversations, ~130 lines of PyTorch. Trains in 5 min on a free Colab T4. The fish thinks the meaning of life is food. Fork it and swap the personality for your own character.
AI · Apr 2026 · github.com
- BC
Life & fun · Apr 2026 · sam-burns.com
- IB
With social media and now AI, its important to keep the indie web alive. There are many people who write frequently. Blogosphere tries to highlight them by fetching the recent posts from personal blogs across many categories. There are two versions: Minimal (HN-inspired, fast, static): https://text.blogosphere.app/ Non-minimal: https://blogosphere.app/ If you don't find your blog (or your favorite ones), please add them. I will review and approve it.
AI · Apr 2026 · text.blogosphere.app