Say Hi!.

What it does

What happened next

By January 2016 the same three makers had relaunched the app on Product Hunt as Hiboo, with the same tagline, and in April 2016 co-founder Matthieu Rigolot described it on The App Guy Podcast as in private beta. AlternativeTo now lists Hiboo as discontinued and removed from the App Store, and hiboo.co redirects to a domain-sale page; no statement from the makers was found.

The app continued as Hiboo in 2016; a user-edited directory marks Hiboo discontinued and removed from the App Store and hiboo.co is for sale, but no statement from the makers about ending it was found.

What’s on record

1. 2016-01-28
   Renamed

   The same three makers launched the app on Product Hunt as Hiboo, keeping the tagline 'See what your friends type while they're typing' (launch date per hunted.space).

   Rename · Announced

   • producthunt.com
2. 2015-10-26
   On record

   Say Hi! was featured on BetaList as a UK messaging app showing what friends type in real time, made by Matthieu Rigolot, Andrew Marin and Eleanor Harding.

   On record · Announced

   • betalist.com
3. 2026-09-29
   Site check

   The domain showed something unrelated.

On the old Stompstart

1. Date unconfirmed
   Stompstart listing

   Only a directory excerpt survives. It described Say Hi! as a messaging app that sent what you typed while you were typing it, promising faster replies and funnier messages by moving on from static, synchronous messaging, and aimed it at students and teenagers.

   Say Hi!

   See what your friends type while they're typing!

   Say Hi allows you to send what you type while you're typing! With faster replies and hilarious messages guaranteed, we're showing you both sides of the story. We're moving forward from static and synchronous messaging. You've never seen messaging like this. It's fa...

   Captured 2019-07-20 from a directory page

Stories

• The live-typing London messenger that became Hiboo · 2026-09-29