CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Seres
Therapeutics, Inc. of our report dated March 6, 2019 relating to the financial statements, which appears in Seres Therapeutics, Inc.s Annual Report on Form 10-K for the year ended December 31, 2018.
/s/ PricewaterhouseCoopers LLP
March 6, 2019