Amendment Number Five to Google Services Agreement (March 13th, 2015)

This Amendment Number Five to the Google Services Agreement ("Amendment") is effective as of August 1, 2014 ("Amendment Effective Date"), and amends the Google Services Agreement by and between Synacor, Inc. ("Company") and Google Inc. ("Google") with an effective date of March 1, 2011, as amended (the "Agreement"). Capitalized terms not defined in this Amendment have the meanings given to those terms in the Agreement. The parties agree as follows:

To Amended and Restated Master Services Agreement (August 14th, 2014)

This Amendment ("Amendment") effective as of June 12th, 2014 ("Amendment Effective Date") is between Synacor, Inc. ("Synacor") and Charter Communications Operating, LLC ("Client") under which the parties hereto mutually agree to modify and amend the Synacor Amended and Restated Master Services Agreement, dated April 1, 2010 (including the exhibits, schedules and amendments thereto, the "Agreement"). Any capitalized terms used herein, which are defined in the Agreement and not otherwise defined herein, shall have the meanings ascribed to them in the Agreement.

Sixth Amendment To (May 15th, 2014)

This Sixth Amendment ("Sixth Amendment") effective as of November 1, 2013 ("Sixth Amendment Effective Date") is by and between Synacor, Inc. ("Synacor") and Qwest Corporation, on behalf of itself and as agent for its Affiliates ("Client") under which the parties hereto mutually agree to modify and amend the Amended & Restated Master Services Agreement, effective as of April 1, 2012, as amended (including the exhibits, schedules and amendments thereto, the "Agreement") as provided in this Sixth Amendment. All terms defined herein shall be applicable solely to this Sixth Amendment. Any capitalized terms used herein, which are defined in the Agreement and are not otherwise defined herein, shall have the meanings ascribed to them in the Agreement.

Fifth Amendment (May 15th, 2014)

This Fifth Amendment ("Fifth Amendment") effective as of January 29, 2013 ("Fifth Amendment Effective Date") is by and between Synacor, Inc. ("Synacor") and Qwest Corporation, on behalf of itself and as agent for its Affiliates ("Client"), under which the parties hereto mutually agree to modify and amend the Amended and Restated Master Services Agreement, effective as of January 1, 2012, as amended (including the exhibits, schedules and amendments thereto, the "Agreement") as provided in this Fifth Amendment. All terms defined herein shall be applicable solely to this Fifth Amendment. Any capitalized terms used herein, which are defined in the Agreement and not otherwise defined herein, shall have the meanings ascribed to them in the Agreement.

Amendment #4 to Master Services Agreement (November 14th, 2013)

This Amendment ("Amendment") effective June 30, 2013 ("Amendment Effective Date") is between Synacor, Inc. ("Synacor") and Toshiba America Information Systems, Inc. ("Client") under which the parties hereto mutually agree to modify and amend the Master Services and Linking Agreement entered into as of July 1, 2010 (including the exhibits, schedules and amendments thereto, the "Agreement").

June 3, 2013 (August 13th, 2013)

On April 16, 2012, the Board granted you an option to purchase 100,000 shares of the Company's common stock with an exercise price equal to $7.10 per share (the "Option"). The Option is subject to the terms and conditions applicable to options granted under the Company's 2012 Equity Incentive Plan (the "Plan"), as described in the Plan and the applicable Stock Option Agreement. 25% of the Option shares vest on April 1, 2014 and the balance vest in equal monthly installments over the next 36 months of continuous service thereafter, subject to your continued service on such dates, as described in the applicable Stock Option Agreement. As of the date of this letter, none of the Option shares are vested.

Amendment #1 to Master Services Agreement (March 26th, 2013)

This Amendment #1 to Master Services Agreement ("Amendment No. 1") effective as of December 20, 2012 ("Amendment No. 1 Effective Date") is between Synacor, Inc. ("Synacor") and Verizon Corporate Services Group Inc., acting on behalf of itself and its Affiliates, including Verizon Online LLC ("Verizon" or "Client") under which the Parties hereto mutually agree to modify and amend the Master Services Agreement, dated as of July 25, 2011 (including Supplements and, together with the Master Agreement, the "Agreement"). All terms defined herein shall be applicable solely to this Amendment No. 1. Any capitalized terms used herein, which are defined in the Agreement and not otherwise defined herein, shall have the meanings ascribed to them in the Agreement.