Evolution of conversational interfaces

SMS

100 BILLION

Email Twitter

n

30 BILLION 20 BILLION

1970

1990

2010

2015 2016

SMS

100 BILLION

Email Twitter Messaging apps

n

30 BILLION 20 BILLION

1970

1990

2010

2015 2016

SMS

100 BILLION

Email Twitter Messaging apps

60 BILLION n

30 BILLION 20 BILLION

1970

1990

2010

2015 2016

SMS

100 BILLION

Email Twitter Messaging apps

60 BILLION n

30 BILLION 20 BILLION

1970

1990

2010

2015 2016 2019

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