Slack Announces Strong Third Quarter Fiscal Year 2021 Results

By the team at SlackDecember 1st, 2020

Editor’s Note: 
As you may have heard, Slack is now a part of Salesforce! This means some of the information below is dated, but we wanted to keep it around for historical context and other good reasons. For more details on Salesforce’s acquisition of Slack, read the official announcement


Total revenue of $234.5 million up 39% year-over-year
Added 12,000 net new Paid Customers, up 140% year-over-year
Over 520,000 connected endpoints on Slack Connect, up 240% year-over-year

Slack Technologies, Inc., (NYSE: WORK) today reported financial results for its fiscal quarter ended October 31, 2020.

Management Commentary:

“We had a phenomenal quarter, headlined by continued acceleration in new paid customer growth, with 12,000 net paid customer additions, up 140% from the same quarter last year,” said Stewart Butterfield, Chief Executive Officer and Co-Founder at Slack. “The accelerating growth is partly driven by increased awareness and demand due to the work from home environment, but we believe the larger portion comes from continued product momentum which shows up in the new user experience and, especially, from Slack Connect driving viral growth. Finally, we’re thrilled by the continued momentum in the enterprise segment where we’re seeing market leaders overwhelmingly choosing Slack for its unmatched security, scalability, flexibility, and user experience.”

“We saw improving trends in the overall buying environment and large enterprises continue to standardize on Slack. We ended the quarter with 1,080 customers spending more than $100,000 annually, up 32% year-on-year,” said Allen Shim, Chief Financial Officer at Slack. “Our focus remains on investing as we help define the future of work. We also continue to drive leverage and delivered record free cash flow in the quarter.”

Third Quarter Fiscal 2021 Financial Highlights:

  • Total revenue was $234.5 million, an increase of 39% year-over-year.
  • Calculated Billings was $252.4 million, an increase of 36% year-over-year.
  • GAAP gross profit was $202.0 million, or 86.1% gross margin, compared to $145.6 million, or 86.3% gross margin, in the third quarter of fiscal year 2020. Non-GAAP gross profit was $205.7 million, or 87.7% gross margin, compared to $148.9 million, or 88.3% gross margin, in the third quarter of fiscal year 2020.
  • GAAP operating loss was $65.7 million, or 28.0% of total revenue, compared to a $95.0 million loss in the third quarter of fiscal year 2020, or 56.3% of total revenue. Non-GAAP operating loss was $3.1 million, or 3% of total revenue, compared to a $18.1 million loss in the third quarter of fiscal year 2020, or 10.7% of total revenue.
  • GAAP net loss per basic and diluted share was $0.12. Non-GAAP net income per diluted share was $0.01.
  • Net cash provided by operations was $33.5 million, or 14% of total revenue, compared to cash used in operations of $9.1 million, or 5% of total revenue, for the third quarter of fiscal year 2020. Free Cash Flow was $32.6 million, or 14% of total revenue, compared to $(19.1) million, or (11)% of total revenue for the third quarter of fiscal year 2020.

Recent Business Highlights:

  • Third Quarter Highlights:
    • Over 142,000 Paid Customers, up 35% year-over-year.
    • 123% net dollar retention rate.
    • 1,080 Paid Customers with greater than $100,000 in annual recurring revenue, up 32% year-over-year.
    • Over 64,000 Paid Customers using Slack Connect, up from over 52,000 at the end of last quarter.
    • Over 520,000 connected endpoints on Slack Connect, up over 240% year-over-year.

Earnings Conference Call:

As a result of the earlier announcement that Salesforce plans to acquire Slack, the conference call previously scheduled for December 9, 2020 to discuss Slack’s financial results has been canceled.

Non-GAAP Financial Measures:

This press release and the accompanying tables contain the following non-GAAP financial measures: Calculated Billings, Free Cash Flow, non-GAAP gross profit, non-GAAP gross margin, non-GAAP research and development expenses, non-GAAP sales and marketing expenses, non-GAAP general and administrative expenses, non-GAAP operating loss, non-GAAP operating margin, non-GAAP net income (loss), and non-GAAP net income (loss) per share. Certain of these non-GAAP financial measures exclude stock-based compensation and related employer payroll taxes, amortization of debt discount and issuance costs, and amortization of intangible assets.

Slack believes that these non-GAAP measures of financial results provide useful information to management and investors regarding certain financial and business trends relating to Slack’s financial condition and results of operations. Slack’s management uses these non-GAAP measures to compare Slack’s performance to that of prior periods for trend analysis, and for budgeting and planning purposes. Slack believes that the use of these non-GAAP financial measures provides an additional tool for investors to use in evaluating ongoing operating results and trends and in comparing Slack’s financial measures with other software companies, many of which present similar non-GAAP financial measures to investors. The non-GAAP financial information is presented for supplemental informational purposes only, should not be considered a substitute for financial information presented in accordance with GAAP, and may be different from similarly titled non-GAAP measures used by other companies.

Management does not consider these non-GAAP measures in isolation or as an alternative to financial measures determined in accordance with GAAP. The principal limitation of these non-GAAP financial measures is that they exclude significant expenses and income that are required by GAAP to be recorded in Slack’s financial statements. In addition, they are subject to inherent limitations as they reflect the exercise of judgment by management about which expenses and income are excluded or included in determining these non-GAAP financial measures. Slack urges investors to review the reconciliation of its non-GAAP financial measures to the comparable GAAP financial measures, which it includes in press releases announcing quarterly financial results, including this press release, and not to rely on any single financial measure to evaluate Slack’s business.

Reconciliation tables of the most comparable GAAP financial measures to the non-GAAP financial measures used in this press release are included with the financial tables at the end of this release.

Forward-Looking Statements:

This press release contains “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, including but not limited to, statements regarding our financial outlook, product development, business strategy and plans, market trends and market size, opportunities, and positioning, and the proposed acquisition of Slack by Salesforce. These forward-looking statements are made as of the date they were first issued and were based on current expectations, estimates, forecasts, and projections as well as the beliefs and assumptions of management. Forward-looking statements are subject to a number of risks and uncertainties, many of which involve factors or circumstances that are beyond Slack’s control. Slack’s actual results could differ materially from those stated or implied in forward-looking statements due to a number of factors, including but not limited to, risks detailed in Slack’s Quarterly Report on Form 10-Q for the quarter ended July 31, 2020. Further information on potential risks that could affect actual results will be included in the subsequent periodic and current reports and other filings that Slack makes with the Securities and Exchange Commission from time to time, including its Quarterly Report on Form 10-Q for the quarter ended October 31, 2020. The forward-looking statements included in this press release represent Slack’s views as of the date of this press release. Slack undertakes no intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Investor Presentation:

An investor presentation providing additional information and analysis can be found at

About Slack:

Slack has transformed business communication. It’s the leading channel-based messaging platform, used by millions to align their teams, unify their systems, and drive their businesses forward. Only Slack offers a secure, enterprise-grade environment that can scale with the largest companies in the world. It is a new layer of the business technology stack where people can work together more effectively, connect all their other software tools and services, and find the information they need to do their best work. Slack is where work happens.

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Slack and the Slack logo are trademarks of Slack Technologies, Inc. or its subsidiaries in the U.S. and/or other countries. Other names and brands may be claimed as the property of others.


Jesse Hulsing Jonathan Prince
Investor Relations Public Relations


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