You asked about Telecommunications
26 people built something like it. 4 are gone.
That is 17% of the ones whose fate we could settle, against 23% across the whole register. 2 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | YCSomos Internet for the urban developing world. · somosinternet.co | still up |
| 2019-01-01 | The phone that gives families peace of mind about aging parents · communityphone.org | still up |
| 2021-01-01 | YCgaiia all-in-one operating system (OS) for telcos · gaiia.com | still up |
| 2020-06-01 | YCReady Collaborative platform for optimizing regulated utilities such as… · ready.net | still up |
| 2021-01-01 | YCDyte Real-time audio & video SDKs, ready to launch 🚀 · dyte.io | acquired |
| 2024-01-01 | YCSalvy Mobile carrier for businesses in Brazil · salvy.com.br | still up |
| 2021-06-01 | YCfluke fluke is a full-digital mobile operator in Brazil · flu.ke | still up |
| 2017-01-01 | Decentralised broadband connectivity. · dabba.com | still up |
| 2021-06-01 | YCSiglo Home Internet for urban Latin America · siglo.com | still up |
| 2022-06-01 | YCDevyce The global mobile network for business. · devyce.com | still up |
| 2020-01-01 | YCFarcast We build advanced satcom user terminals · farcast.com | still up |
| 2012-01-01 | Building Mission Critical Software Defined Radio products. · pervices.com | still up |
| 2023-01-01 | YCEzDubs Real-time speech translation · ezdubs.ai | acquired |
| 2025-01-01 | Voice AI teams for medicare agencies. · carecycle.ai | still up |
| 2024-01-01 | AI platform for phone-first sellers · terrakotta.ai | still up |
| 2018-01-01 | YCNecto ISP starter kit · joinnecto.com | gone |
| 2011-06-01 | YCPhoneSys The Phone System for Sales Teams. · pingm.net | gone |
| 2023-06-01 | YCSmobi Send texts your customers actually want over RCS · smobi.com | still up |
| 2024-09-01 | YCSurge Stripe for telephony · surge.app | still up |
| 2024-01-01 | YCAveryIQ AI Copilot for Property Managers and Landlords · averyiq.com | still up |
| 2025-01-01 | YCPinch AI Voice Translation for live conversations or media · startpinch.com | still up |
| 2012-06-01 | YCProfig The phone system for businesses. Manage everything from your company… · profig.com | gone |
| 2014-06-01 | YCBeep Cellular networks for IoT. · beepnetworks.com | gone |
| 2019-01-01 | Skip Busy Phone Lines · autodial.com | still up |
| 2026-06-01 | YCExosat Building a neutral, sovereign alternative to Starlink · exosat.com | still up |
| 2017-01-01 | YCTizeti ISP for Africa · tizeti.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.