Hotmail’s email signup footer
App & software · 1996 · Niche
Every outgoing email carried an invitation to open a free Hotmail account.
Spread Score
How it worksNumbers
- Worldwide members
- >9M
- Microsoft claim · Dec 31, 1997 · Self-reported · Microsoft
- Seed to milestone
- 18 months
- Jul 4 ’96 to Dec 31 ’97
- Platforms
- 2
- Started on Open web
- Origin
- Seeded
- Technology
How it spread
Trace the originHotmail launched in July 1996 and attached a free-account invitation to outgoing mail. By Microsoft’s December 1997 acquisition announcement, it had more than nine million members. A contemporary court ruling independently records the automatic footer.
Documented milestone; not a measured attention peak.
4 more events on this chart
Join free to see themSpread the same way
New cases, every week
How the next thing spread, the week it does.



