CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (No. 333-223514, 333-210171 and 333-205253) and Form S-3 (No. 333-216735) of Seres Therapeutics, Inc. of our report dated March 6, 2019 relating to the financial statements, which appears in this Form 10-K.
/s/ PricewaterhouseCoopers LLP
March 6, 2019