Commerce · alternatives · 2026
24 alternatives to I built a 2-min quiz that shows you how bad you are at estimating
I've gotten to the point in my career where I now make strategic decisions often (hiring, firing, choosing what equipment to go with, etc.), as well as in my personal life where I need to strongly weigh my options for a big purchase or investment. I found a not-so-surprising parallel between the two as these decisions "resolved." Am I making good decisions or am I getting lucky? Did some research, read some books, and realized I should get in the habit of tracking my decision process. That quickly turned into the idea that formed Convexly. The landing page is a 10-question calibration quiz…
Convexly offers a two-minute calibration quiz that measures how well users estimate confidence in their predictions. Users answer ten questions by assigning confidence levels to statements and receive a Brier score… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1IQ
Quick background: I used to code. Studied it in school, wrote some projects, but eventually convinced myself I wasn't cut out for it. Too slow, too many bugs, imposter syndrome — the usual story. So I pivoted, ended up as an investment associate at an early-stage angel fund, and haven't written real code in years. Fast forward to now. I'm a Buffett nerd — big believer in compound interest as a mental model for life. I run compound interest calculations constantly. Not because I need to, but because watching numbers grow over 30-40 years keeps me patient when markets get wild. It's basically…
Jan 2026 · calquio.com · its alternatives →
- 2
Want profitability? Figure it out in under 60 seconds.
2016 · its alternatives →
- 3
Figure out how much equity to grant new hires in seconds.
2014 · startupequity.io · its alternatives →
- 4
Decide this, decide that, but decide NOW.
Oct 2025 · decisio-mate.vercel.app · its alternatives →
- 5WU
hey y'all -- can you please tell us if our job search tool sucks? :D we built it using an investor platform called Harmonic.ai to gather startup data, then contextualize it so that job seekers could find out about the most exciting startups hiring first (like if they just raised, growing headcount fast, have an ex-unicorn founder, etc). pretty sure we're the first platform doing anything like this. anyway, let me know what you think. really excited to launch this thing soon! getting feedback from the hn community first is really fun :)
2022 · joinmaasive.com · its alternatives →
- 6
Hi HN. I'm a founder working on a sales tool. I found my own pitch was a major weak point, so I created a 10-point framework to grade it objectively based on best practices (value prop, social proof, etc.). I'm trying to validate if this is a problem other founders face. The scorecard is just a simple page with the checklist. Any feedback on the framework itself would be really appreciated.
2025 · salesly-private-beta-mvt.webflow.io · its alternatives →
- 7AY
Test your estimation skills with a simple quiz
Oct 2025 · estimator.dylancastillo.co · its alternatives →
- 8
Test your business idea before you build. Market validation with real data on competitors, demand, and viability from 60+ live sources. Free 60-second scan.
Feb 2026 · preuve.ai · its alternatives →
- 9
The thing you half-knew but never saw written down.
Jun 2026 · afroakito.github.io · its alternatives →
- 10MS
For years, I have struggled to understand my cash flow and save for the future. In addition to that, my wife has many credit cards and accounts that complicate matters. I am building a tool that connects all our accounts, helps us create a budget, and tracks and adjusts expenses on the fly. I am also sprinkling some AI magic on it for financial suggestions. I am looking for feedback on the implementation. More importantly, I am looking for more beta testers to improve the product.
2023 · financemadelovely.com · its alternatives →
- 11IA
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/
2025 · validationly.com · its alternatives →
- 12
Howdy friends. I've been a zero to one product manager for 12 plus years and along the way I kept borrowing pieces from different discovery frameworks until I had a methodology of my own, one that actually raises the odds of an idea succeeding. This does not replace user interviews obviously, but it leads you in the right direction. Looking forward for your feedback
Jul 2026 · github.com · its alternatives →
- 13
For the last few months I have been analysing Peter Lynch’s books on stock picking and doing prompt engineering to check if AI could create useful stock analyses. To my surprise it started making reports that allow me to understand companies much faster with well cited sources. I hope you find it interesting and useful :) Perter Lynch’s books I analyzed: Learn to earn, One up on Wall Street, Beating the street
Jun 2026 · github.com · its alternatives →
- 14
I built a tool (https://1mil.app/hn) to help me test my intuition about various weird business ideas that were on my mind. Initially, I wanted to create a database with 1 million business ideas (hence the name - "1 million opportunities"). But turned out to be a dumb idea already. So instead I built this tool that returns only 10 ideas. It's all based on your input, market + your background. The first release scored on demand only and it gave false confidence. So I rebuilt the the scoring around "winnability": can a solo founder with a specific background "win" against what…
Aug 2026 · 1mil.app · its alternatives →
- 15
legit▲2Score "make money with AI" posts on feasibility, not hype.
Jun 2026 · uselegit.app · its alternatives →
- 16
Hey HN, We explored how decision-making happens under severe information asymmetry and used career exploration as a test subject. In practice, people converge on a small set of highly legible default paths, with little visibility into credible alternatives. That’s why we’re building Fig, a tool for reasoning about career paths when the next step isn’t obvious, given the dependence on fleeting personal preferences. Most existing tools respond by collapsing uncertainty into a single recommendation or by modeling careers as linear trajectories. That works reasonably well at the recruiting…
Jan 2026 · figcareer.com · its alternatives →
- 17
GTM iteration is slow by nature. Test the price, wrong. Fix the message, doesn't convert. Try a new audience, wrong segment. Pick a channel, no traction. Each mistake costs a month. By the time you've iterated to something that works, the market has moved - especially now, when AI is reshaping what buyers want every quarter. We built RightSuite to compress that cycle. Describe your offer and target audience. The system runs it through a synthetic buyer population and tells you what's likely broken before you go live. It won't replace talking to real customers. Nothing does. But it means you…
Apr 2026 · github.com · its alternatives →
- 18
I built this while preparing for startup interviews because I noticed I rambled under pressure. So I made a tool that runs a short, live YC-style voice interview with interruptions, follow-up questions, and post-call feedback. It started as an internal project. I kept improving it because it helped me tighten how I explain the problem, market, and metrics. Now I’m sharing it to get honest feedback from other founders. I’d especially like feedback on: 1) whether the interview pressure feels realistic 2) what question types are missing 3) what would make the feedback more useful There’s a…
Feb 2026 · getycready.com · its alternatives →
- 19TM
Hi HN, My name is Sapiens. I started learning about Reason and Science well into my 30s. I'd be fair to say that the Skeptic and Humanist communities saved my soul. So I made a mind-calibration tool in service of the cause. It's an app that quizzes the user about myths and misconceptions. By exploiting the resulting cognitive dissonance, it helps retune the user's confidence levels in their beliefs and improves their mental models. The tool uses Brier's so-called "proper" scoring system, a ruthless squared-error-loss scale (Brier scoring is widely used by intelligence agencies to align their…
2025 · memevaccine.com · its alternatives →
- 20
Hi HN! I’m a founder at Nextmv (YC 20) [1] We’ve been building out optimization algorithm testing capabilities (acceptance tests, etc.) and just shipped our first pass at shadow testing [2, 3]. In our experience, tools like shadow testing save time and build confidence in decision models, but tools also take time to build and maintain. We’ve seen shadow testing tools in the machine learning and MLOps space [4], but not so much in the operations research community. A lot of folks here [5] seem experienced with optimization models and we’d love to have your feedback! What do you like? What…
2023 · nextmv.io · its alternatives →
- 21MB
I think tracking how you feel over time can radically improve decision making. So I made a quick little webapp that helps you do that! 1. Submit a question with a schedule 2. Emails notify you when it's time to respond 3. See how you feel over time https://simple-decisions.herokuapp.com/
2017 · its alternatives →
- 22
I am working on this because I am always afraid of building things that people don't actually want. I let agents role-play analysis the idea, quote and debate with each other. Still working on the output quality, every feedback is priceless. Pls try it out!
Jan 2026 · idea-council.com · its alternatives →
- 23
- 24
Augur▲3You think you predict well. Prove it.
Jun 2026 · buildwiseco1.gumroad.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →