Depends on how you define launch I guess. Gmail began as invite-only around 2004, I believe. Publicly available, but still in beta around 2007, and released fro

Depends on how you define launch I guess. Gmail began as invite-only around 2004, I believe. Publicly available, but still in beta around 2007, and released from beta in 2009. If you use the publicly available date, then it's about 5 years.