Exhibit 16.1
June 4, 2013
U.S. Securities and Exchange Commission
Office of the Chief Accountant
100 F Street, NE
Washington, DC 20549
Re: | SPS Commerce, Inc. |
File No. 001-34702
Dear Sir or Madam:
We have read Item 4.01 of Form 8-K of SPS Commerce, Inc. dated June 4, 2013, and agree with the statements concerning our Firm contained therein.
Very truly yours,
/s/GRANT THORNTON LLP