United States securities and exchange commission logo February 28, 2022 Thomas R. Windhausen Chief Financial Officer Bridgeline Digital, Inc. 100 Sylvan Road, Suite G-700 Woburn, MA 01801 Re: Bridgeline Digital, Inc. Registration Statement on Form S-3 Filed February 16, 2022 File No. 333-262764 Dear Mr. Windhausen: This is to advise you that we do not intend to review your registration statement. We request that you publicly file your registration statement no later than 48 hours prior to the requested effective date and time. Please refer to Rules 460 and 461 regarding requests for acceleration. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Please contact Matthew Derby, Staff Attorney, at (202) 551-3334 or Joshua Shainess, Legal Branch Chief, at (202) 551-7951 with any questions. Sincerely, Division of Corporation Finance Office of Technology