TWILIO INC

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☒ Definitive Proxy Statement

☐ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

Twilio Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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TWILIO INC. 101 Spear Street, Fifth Floor San Francisco, California 94105

Notice of Annual Meeting of Stockholders

To Be Held at 9:00 a.m. Pacific Time on June 16, 2026

Dear Stockholders of Twilio Inc.:

We cordially invite you to attend the 2026 annual meeting of stockholders (the “Annual Meeting”) of Twilio Inc., a Delaware corporation, which will be held virtually on June 16, 2026 at 9:00 a.m. Pacific Time via live audio webcast at www.virtualshareholdermeeting.com/TWLO2026, for the following purposes, as more fully described in the accompanying proxy statement:

1. To elect Charles Bell, Jeffrey Immelt, Douglas Robinson and Erika Rottenberg to serve as directors until the next annual meeting of stockholders and until their successors are duly elected and qualified;

2. To ratify the appointment of KPMG LLP as our independent registered public accounting firm for our fiscal year ending December 31, 2026;

3. To approve, on a non-binding advisory basis, the compensation of our named executive officers;

4. To approve the Twilio Inc. Amended and Restated 2016 Stock Option and Incentive Plan;

5. To approve the Twilio Inc. Amended and Restated 2016 Employee Stock Purchase Plan; and

6. To transact such other business as may properly come before the Annual Meeting or any adjournments or postponements thereof.

The Annual Meeting will be a virtual meeting held via live audio webcast. You will be able to attend the meeting, vote your shares and submit your questions during the meeting at www.virtualshareholdermeeting.com/TWLO2026. As always, we encourage you to vote your shares prior to the Annual Meeting either via the internet, by telephone or by mail to help make this meeting format as efficient as possible.

Our board of directors has fixed the close of business on April 17, 2026 as the record date for the Annual Meeting. Only stockholders of record as of the close of business on April 17, 2026 are entitled to notice of and to vote at the Annual Meeting. Further information regarding voting rights and the matters to be voted upon are presented in the accompanying proxy statement.

This proxy statement and our annual report can be accessed directly at www.proxyvote.com. You will be asked to enter the 16-digit control number located on your proxy card.

YOUR VOTE IS IMPORTANT. Whether or not you plan to attend the Annual Meeting, we urge you to submit your vote as soon as possible to ensure that your shares are represented. For additional instructions on how to vote your shares, please refer to your proxy card. Voting your shares by proxy prior to the Annual Meeting does not deprive you of your right to attend the Annual Meeting and to vote your shares at the Annual Meeting.

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