Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2021

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	As of
	June 30,	December 31,
	2021	2020
Stock options issued and outstanding	4,786,740	5,625,735
Unvested restricted stock units issued and outstanding	7,008,107	7,523,882
Class A common stock reserved for Twilio.org	663,061	707,265
Stock-based awards available for grant under 2016 Plan	25,833,950	18,942,205
Stock-based awards available for grant under ESPP	6,481,649	4,941,281
Class A common stock reserved for the Convertible Notes	—	7,569,731
Total	44,773,507	45,310,099