Exhibit 1

Joint Filing Agreement

In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing on behalf of each of them of a Statement on Schedule 13G (including any further amendments thereto) with respect to the common stock, par value $0.0001 per share, of Apptio, Inc.

Dated: February 14, 2018

MADRONA VENTURE FUND III, L.P.

By: /s/ Troy Cichos                                                     

Troy Cichos

Its Authorized Signatory

MADRONA VENTURE FUND III-A, L.P.

By: /s/ Troy Cichos                                                     

Troy Cichos

Its Authorized Signatory

MADRONA INVESTMENT PARTNERS III, L.P.

By: /s/ Troy Cichos                                                     

Troy Cichos

Its Authorized Signatory

MADRONA III GENERAL PARTNER, LLC

By: /s/ Troy Cichos                                                     

Troy Cichos

Its Authorized Signatory

*

Matt McIlwain

*

Tom A. Alberg

*

Paul Goodrich

*

Len Jordan

*

Tim Porter

*

Scott Jacobson

* By: /s/ Troy Cichos

Attorney-in-Fact pursuant to Power of Attorney filed as Exhibit 1 to initial Schedule 13G filed with the SEC on February 14, 2017

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