Eco-Stim Energy Solutions (ESESQ) S-8 Registration of securities for employees

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated March 17, 2016, with respect to the consolidated balance sheets of Eco-Stim Energy Solutions, Inc. as of December 31, 2015 and 2014, and the related consolidated statements of operations, cash flows, changes instockholders’ equity, and comprehensive loss for each of the years in the two-year period ended December 31, 2015, included in the company’s Annual Report on Form 10-K for the year ended December 31, 2015, filed with the Securities and Exchange Commission.

/s/ Whitley Penn LLP

Dallas, Texas

September 8, 2016