You asked about Trading
33 people built something like it. 2 are gone.
That is 7% of the ones whose fate we could settle, against 23% across the whole register. 4 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2019-01-01 | YCKalshi 1st federally regulated exchange where people can trade on events · kalshi.com | still up |
| 2014-06-01 | YCSFOX Crypto-currency trading platform. · sfox.com | still up |
| 2022-06-01 | YCNovig America's #1 Sports Trading App · novig.com | still up |
| 2021-01-01 | YCHapi Stocks and cryptos trading app with zero commissions and no minimums… · hapi.trade | still up |
| 2022-06-01 | YCAlgoTest Ecosystem for options trading in India · algotest.in | still up |
| 2022-01-01 | YCAnfin A multi-asset trading platform dedicated to retail investors · anfin.vn | still up |
| 2021-06-01 | Helping Indians make better financial decisions. · marketfeed.com | still up |
| 2022-01-01 | Plaid for trading · snaptrade.com | still up |
| 2021-06-01 | The Trading Terminal For Crypto Traders · gethypertrader.com | still up |
| 2022-01-01 | The NFT exchange for traders · nftscoring.com | gone |
| 2026-06-01 | YCDonkey The AI-native trading company: factory prices, delivered, one number · donkey.trade | still up |
| 2019-06-01 | Institutional equities broker-dealer · prooftrading.com | still up |
| 2021-06-01 | YCCoinrule Coinrule Automates Your Crypto and Stock Investments · coinrule.com | still up |
| 2009-06-01 | YCListia Mobile marketplace for trading used goods. · listia.com | still up |
| 2022-01-01 | YCDecent Cross-chain routing + trading APIs. One-click transactions with any… · decent.xyz | acquired |
| 2021-06-01 | YCGamerPay We are the marketplace for trading gaming skins & assets without scams · gamerpay.gg | acquired |
| 2023-01-01 | YCFintool Financial copilot for institutional investors · fintool.com | acquired |
| 2026-01-01 | YCInstinct Trade your instinct · instinct.xyz | still up |
| 2021-06-01 | YCNasdisc A marketplace for vinyl, cassettes and cds · nasdisc.com | acquired |
| 2016-01-01 | YCAlgoriz Algoriz is an AI based algorithmic trading platform that enables you… · algoriz.com | gone |
| 2026-01-01 | YCValence Unified prediction markets trading platform · valence.trade | still up |
| 2024-09-01 | YCattimet Building the Prime Radiant · attimet.com | still up |
| 2026-06-01 | YCArbital The social trading app for stocks, memes, and perps · arbital.xyz | still up |
| 2026-06-01 | YCTovenAI AI agents for compliance at institutional trading firms · toven.ai | still up |
| 2026-06-01 | We are a multi-strategy trading firm that trains AI traders. · spectreintelligence.ai | still up |
| 2026-06-01 | Derivatives Exchange for Compute · getcomputable.com | still up |
| 2026-06-01 | Training the world's best AI model for quantitative finance. · prodigy.markets | still up |
| 2026-06-01 | YCEkpa Building Autonomous Research Agents for Trading · goekpa.com | still up |
| 2025-09-01 | YCBron TikTok for Sports Trading · askbron.ai | still up |
| 2025-01-01 | YCAxiom Trade memecoins, perpetuals, and earn yield. · axiom.trade | still up |
| 2026-01-01 | YCAxis An AI Copilot for Trading Desks · axisanalysis.com | still up |
| 2025-06-01 | YCLotas AI for quantitative trading · lotas.ai | still up |
| 2022-01-01 | YCAYC Fund AI-native crypto hedge fund · aycfund.com | still up |
How this compares
The register re-probes every domain it holds. Some that answered last month stop answering. We send that list — what went quiet, and what it was — once a month. Nothing else.
How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.