Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

Schedule of reserved shares of common stock for issuance

The Company had reserved shares of common stock for issuance as follows:

	As of December 31,
	2019	2018
Stock options issued and outstanding	7,705,848	7,978,369
Nonvested restricted stock units issued and outstanding	8,490,517	8,262,902
Class A common stock reserved for Twilio.org	795,673	572,676
Stock-based awards available for grant under 2016 Plan	14,957,734	9,313,354
Stock-based awards available for grant under 2016 ESPP	3,848,953	3,092,779
Class A common stock reserved for the convertible senior notes	10,472,165	10,472,165
Total	46,270,890	39,692,245