Exhibit 99.1

Alteryx Announces Fourth Quarter and Full Year 2017 Financial Results

Fourth Quarter Revenue Increased 55% Year-over-Year to $38.6 million

Full Year 2017 Revenue Increased 53% Year-over-Year to $131.6 million

IRVINE, Calif. – February 21, 2018 – Alteryx, Inc. (NYSE: AYX), a provider of a leading end-to-end analytics platform for the enterprise, today announced financial results for its fourth quarter and full year ended December 31, 2017.

“The fourth quarter was a very strong end to a terrific 2017. During the fourth quarter, revenue increased 55% year-over-year and dollar-based net revenue retention rates were again above 130% for the fifth consecutive quarter,” said Dean Stoecker, CEO of Alteryx, Inc.

Stoecker continued, “Demand for our complete end-to-end analytics platform for the enterprise increased, driven by our land and expand strategy. We added a meaningful number of net new customers and continue to have a very strong dollar-based net revenue retention rate. More and more of our customers are embracing our expanded platform and partnering with us to create an analytics culture that is core to their organization. As we look to 2018, we are focused on delivering innovation to strengthen our platform, investing in sales and marketing initiatives globally to capture our large market opportunity, and building out our world class teams. We believe we are building an enduring business that can deliver strong revenue growth, on our path towards long-term sustainable profitability.”

Fourth Quarter 2017 Financial Highlights

Non-GAAP net income for the fourth quarter was $1.4 million, an improvement compared to a non-GAAP net loss of $(5.1) million for the fourth quarter of 2016. Non-GAAP net income per diluted share for the fourth quarter was $0.02, based on 62.7 million non-GAAP weighted-average diluted shares outstanding, compared to a non-GAAP net loss per share of $(0.11), based on 47.2 million non-GAAP weighted-average basic and diluted shares outstanding, for the fourth quarter of 2016.

Full Year 2017 Financial Highlights

Non-GAAP net loss for the full year was $(6.4) million, an improvement compared to a non-GAAP net loss of $(21.0) million for the full year 2016. Non-GAAP net loss per share for the full year was $(0.11), based on 56.3 million non-GAAP weighted-average basic and diluted shares outstanding, compared to a non-GAAP net loss per share of $(0.45), based on 47.1 million non-GAAP weighted-average basic and diluted shares outstanding, for the full year 2016.

Balance Sheet and Cash Flow: As of December 31, 2017, Alteryx had cash, cash equivalents, and short- and long-term investments of $194.1 million, compared with $182.6 million as of September 30, 2017. Cash provided by operating activities for the fourth quarter of 2017 was $12.5 million compared to $3.1 million in the same period last year. For the full year 2017, cash provided by operating activities was $18.9 million, compared to $(6.0) million used in operating activities for the same period last year.

A reconciliation of GAAP to non-GAAP financial measures is provided in the tables included in this press release. An explanation of these measures is also included below under the heading “Non-GAAP Financial Measures.”

Fourth Quarter and Recent Business Highlights

Financial Outlook

As of February 21, 2018, guidance for the first quarter 2018 and full year 2018 is as follows:

The financial outlook above for non-GAAP loss from operations and non-GAAP net loss per share exclude estimates for stock-based compensation expense, acquisition related adjustments, and other non-recurring items. A reconciliation of the non-GAAP financial guidance measures to corresponding GAAP measures is not available on a forward-looking basis primarily as a result of the uncertainty regarding, and the potential variability of, stock-based compensation expense, acquisition related adjustments, and other non-recurring items. In particular, stock-based compensation expense is impacted by our future hiring and retention needs, as well as the future fair market value of our Class A common stock, all of which is not within our control, is difficult to predict, and is subject to constant change. The actual amount of these expenses during 2018 will have a significant impact on our future GAAP financial results. Accordingly, a reconciliation of the non-GAAP financial guidance measures to the corresponding GAAP measures is not available without unreasonable effort.

Quarterly Conference Call

Alteryx will host a conference call today at 5:00 p.m. Eastern Time to discuss the Company’s financial results. To access this call, dial 877-407-9716 (domestic) or 201-493-6779 (international). A live webcast of this conference call will be available on the “Investors” page of the Company’s website at www.alteryx.com.

Following the conference call, a telephone replay will be available through February 28, 2018, at 844-512-2921 (domestic) or 412-317-6671 (international). The replay passcode is 13675199. An archived webcast of this conference call will also be available in the “Investors” section of the Company’s website.

Non-GAAP Financial Measures

To supplement our consolidated financial statements, which are prepared and presented in accordance with GAAP, we use the following non-GAAP financial measures: non-GAAP gross profit, non-GAAP gross margin, non-GAAP income (loss) from operations, non-GAAP net income (loss), non-GAAP net income (loss) per share, and non-GAAP weighted-average diluted shares outstanding. The presentation of these financial measures is not intended to be considered in isolation or as a substitute for, or superior to, financial information prepared and presented in accordance with GAAP.

We use non-GAAP measures to internally evaluate and analyze financial results. We believe these non-GAAP financial measures provide investors with useful supplemental information about the financial performance of our business, enable comparison of financial results between periods where certain items may vary independent of business

performance, and enable comparison of our financial results with other public companies, many of which present similar non-GAAP financial measures. We exclude the following items from one or more of our non-GAAP financial measures:

Stock-based compensation expense. We exclude stock-based compensation expense, which is a non-cash expense, from certain of our non-GAAP financial measures because we believe that excluding this item provides meaningful supplemental information regarding operational performance. In particular, companies calculate stock-based compensation expense using a variety of valuation methodologies and subjective assumptions.

Acquisition related adjustments. We exclude amortization of intangible assets, changes in fair value of contingent consideration, and related income tax adjustments, which are non-cash, related to business combinations from certain of our non-GAAP financial measures. We exclude such expenses as they are related to a business combination and have no direct correlation to the operation of our business.

Accretion of Series A redeemable convertible preferred stock. We exclude accretion relating to our Series A redeemable convertible preferred stock from non-GAAP net loss per share because this is a non-cash item that will not recur in the periods following our initial public offering.

Follow-on public offering costs. We exclude the costs relating to our follow-on public offering in September 2017 from certain of our non-GAAP financial measures because the costs do not have a direct correlation to the operation of our business.

Impairment of long-lived assets. We exclude the impairment of long-lived assets from certain of our non-GAAP financial measures, because the expenses are non-cash and do not have a direct correlation to the operation of our business.

In addition, we adjust non-GAAP weighted-average diluted shares outstanding to include the conversion of the redeemable convertible preferred stock into shares of common stock as though the conversion had occurred at the beginning of each of the respective periods. In periods of non-GAAP net income, we adjust non-GAAP weighted-average diluted shares outstanding to include the effect of dilutive shares.

Investors are cautioned that there are material limitations associated with the use of non-GAAP financial measures as an analytical tool. In particular, we exclude stock-based compensation expense and amortization of intangible assets which are recurring and will be reflected in our financial results for the foreseeable future. The non-GAAP measures we use may be different from non-GAAP financial measures used by other companies, limiting their usefulness for comparison purposes. We compensate for these limitations by providing specific information regarding the GAAP items excluded from these non-GAAP financial measures.

Safe Harbor Statement

This press release contains forward-looking statements that involve risks and uncertainties, including statements regarding our outlook for the first quarter 2018 and full year 2018, our market opportunity, our ability to execute the Company’s long-term growth strategy, and other future events. These forward-looking statements are only predictions and may differ materially from actual results due to a variety of factors including, but not limited to: our limited operating history under our current business model; our ability to manage our growth effectively; the rate of growth in the market for analytics products and services; our ability to attract new customers and expand sales to existing customers; our ability to develop and release product and service enhancements and new products and services to respond to rapid technological change in a timely and cost-effective manner; intense and increasing competition in our market; our ability to develop, maintain, and enhance our brand and reputation cost-effectively; our ability to expand our sales force and the effectiveness of our sales force; our ability to establish and maintain successful relationships with our channel partners; risks associated with our international operations; litigation, and related costs; security breaches; and other general market, political, economic, and business conditions.

Additional risks and uncertainties that could affect our financial results are included under the caption “Risk Factors” in our Quarterly Report on Form 10-Q for the three months ended September 30, 2017, which is available on the Investor Relations page of our website at www.alteryx.com and on the SEC website at www.sec.gov. Additional information will also be set forth in our Annual Report on Form 10-K for the year ended December 31, 2017. All forward-looking statements contained herein are based on information available to us as of the date hereof and we do not assume any obligation to update these statements as a result of new information or future events.

About Alteryx, Inc.

Revolutionizing business though data science and analytics, Alteryx offers an end-to-end analytics platform which empowers data analysts and scientists alike to break data barriers, deliver insights, and experience the thrill of getting to the answer faster. Organizations all over the world rely on Alteryx daily to deliver actionable insights. For more information visit www.alteryx.com.

Alteryx is a registered trademark of Alteryx, Inc. All other product and brand names may be trademarks or registered trademarks of their respective owners.

Contact

Investor Relations

Staci Mortenson, 844-842-1912

ICR

ir@alteryx.com

Alteryx, Inc.

Consolidated Statements of Operations and Comprehensive Loss

(in thousands, except per share data)

(unaudited)

Alteryx, Inc.

Stock-Based Compensation Expense

(in thousands)

(unaudited)

Alteryx, Inc.

Consolidated Balance Sheets

(in thousands)

(unaudited)

Alteryx, Inc.

Consolidated Statements of Cash Flows

(in thousands)

(unaudited)

Alteryx, Inc.

Reconciliation of GAAP Measures to Non-GAAP Measures

(in thousands, except percentages and per share amounts)

(unaudited)