Gmail, Google’s email service, now has more than 1 billion active users, Google chief executive Sundar Pichai said during today’s Alphabet (GOOG) earnings call.

That’s up from 900 million active users back in May 2015.

Google launched Gmail in beta in 2004, and it removed the beta label in 2009. In 2014, Google launched the Inbox by Gmail email client.

Last year Google gave Inbox an interesting feature: Smart Reply, which offers users quick and easy responses to messages. Today that feature counts for 10 percent of all responses in Inbox, Pichai told investors on today’s earnings call.

Other Alphabet services with more than 1 billion active users include Google Search, YouTube, Google Maps, Android, and Chrome.

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