v3.26.1
Stockholders' Equity - Common Stock Shares Reserved (Details) - shares
Jun. 30, 2026
Dec. 31, 2025
Stockholders' Equity    
Total (in shares) 35,819,762 54,212,229
Stock-based awards available for grant under 2016 equity plan    
Stockholders' Equity    
Stock-based awards available for grant under 2016 equity plan and shares of class A common stock reserved for issuance pursuant to ESPP (in shares) 10,529,415 28,543,969
Common Stock Class A    
Stockholders' Equity    
Shares of Class A common stock reserved for Twilio.org (in shares) 221,021 265,225
Stock options issued and outstanding    
Stockholders' Equity    
Stock options issued and outstanding (in shares) 767,453 902,120
Unvested restricted stock units issued and outstanding    
Stockholders' Equity    
Unvested restricted stock units issued and outstanding (in shares) 12,168,065 13,663,977
Shares of Class A common stock reserved for issuance pursuant to ESPP    
Stockholders' Equity    
Stock-based awards available for grant under 2016 equity plan and shares of class A common stock reserved for issuance pursuant to ESPP (in shares) 12,133,808 10,836,938