Office profile
Slack Headquarters & offices · San Francisco, California
Slack · San Francisco, California
From ten floors themed on the Pacific Crest Trail to a 61-storey tower with outdoor-fresh air piped to every floor.
Slack's company address today is Salesforce Tower, the 1,070-ft tower of its parent company. Before that it filled 500 Howard Street, where Studio O+A turned each floor into a stretch of trail from desert to glacier. The offices, the benefits and the history — every number from Slack's filings, slack.com and the designers' own pages.
- 61 floorsSalesforce Tower, 1,070 ft
- 10 floorsformer HQ, each a part of the Pacific Crest Trail
- 26 weekspaid leave for primary caregivers (U.S.)
- 2,545full-time employees (Jan 2021, last 10-K)
Sources: slack.com (company address, About) · salesforcetower.com · Pelli Clarke & Partners · Studio O+A · SC Builders · salesforcebenefits.com · Form 10-K FY2021
Companies / United States / Workplace software / Slack
THE HEADQUARTERS · SALESFORCE TOWER
A 1,070-ft tower with fresh air on every floor
Slack lists its company address as Salesforce Tower, 415 Mission Street, 3rd Floor, and says its people work in Slack and from Salesforce offices around the world. The tower's owner describes it as a workspace designed for health: outside-air intakes on every floor, ceilings over 13 ft high, 10-ft continuous clear glass and the largest onsite water-recycling system in a U.S. commercial high-rise. On the fifth floor it connects to the park on the roof of the Transit Center.
- 1,070 ft (326 m), 61 storeys
- 1.4 million sq ft (≈ 130,064 m²)
- LEED Platinum
- Design: Pelli Clarke & Partners
- Completed 2018
- Linked to a rooftop park on floor 5
Salesforce Tower, 415 Mission Street
Slack's headquarters is in Salesforce Tower, the 1,070-ft tower of its parent company Salesforce.
Around the tower
The tower stands next to the Salesforce Transit Center and its rooftop Salesforce Park.
Facts: slack.com (company address, About us) · salesforcetower.com/about · Pelli Clarke & Partners project page “Salesforce Tower”.
Salesforce Tower, and the old HQ at 500 Howard
| Building | Address |
|---|---|
| Company address (Salesforce Tower) | 415 Mission Street, 3rd Floor, San Francisco, CA 94105 |
| Former headquarters (2019 S-1 – 2021 10-K) | 500 Howard Street, San Francisco, CA 94105 |
Source: slack.com Help Center (vendor and payment details) · S-1/A 2019 · See them on the map ↓
Source: Pelli Clarke & Partners project page · salesforcetower.com/about · Studio O+A project page “Slack HQ” · SC Builders project page “Slack HQ, 500 Howard”
Benefits (United States)
Paid, for primary caregivers; 12 weeks for secondary caregivers, then a four-day week for four weeks.
Free each year with a Lyra therapist or coach, for employees and covered family.
Lifetime reimbursement for eligible expenses.
Salesforce shares with 2–15% of eligible pay.
Matched up to 6% of eligible pay, max $6,000 a year.
For activities that help you, your partner and children be well.
56 paid hours a year, plus up to $10,000 in donation matching per fiscal year.
Tuition reimbursement for learning that furthers your development.
Source: salesforcebenefits.com, U.S. pages (Benefits at a Glance, Grow your family, Therapy and coaching, Stock program, Retirement, Perks) — linked from slack.com/careers, which says Slack offers these benefits as part of the Salesforce family.
What keeps people at Slack, in its own words
Empathy, Courtesy, Thriving, Craftsmanship, Playfulness and Solidarity.
In June 2020 Slack said many employees could work remotely for good; jobs today are fully remote, in the office, or both.
A funded program with training, executive coaching and 1:1 sponsorship for high-performing people from under-represented groups.
Executive-sponsored groups for community-building and professional development.
A pledge of 1% of employee time, equity and product, with paid time off to volunteer.
An apprenticeship with The Last Mile that trains formerly incarcerated people and hires them into Slack engineering.
Source: slack.com/careers · Form 10-K FY2021, Human Capital
Who works here
full-time employees (Jan 31, 2021)
employees, Jan 2017 → Jan 2021
cities with Slack offices (FY2021)
incorporated, as Tiny Spec, Inc.
Source: Form 10-K FY2021 · S-1/A 2019
Pay at Slack
Source: Slack job postings JR363198 (Senior Software Engineer, Identity Security) and JR359771 (Staff Backend Engineer, Slackbot AI), 2026. Base salary only; bonus and equity are on top. Typical ranges outside these cities: $172,500–$260,100 and $197,300–$313,700.
Slack doesn't publish pay by age. Its 2020 proxy statement, the only one it filed, has no median-employee pay ratio.
Office history: from Tiny Speck to Salesforce Tower
- 2009 Tiny Speck
The company was incorporated in 2009 as Tiny Spec, Inc. and renamed Tiny Speck, Inc. later that year. Co-founder Stewart Butterfield became CEO in February 2009.
Source: S-1/A, May 31, 2019
No free-to-use photo found yet.Have one? We’d love to add it. - 2014 The name becomes Slack
Tiny Speck renamed itself Slack Technologies, Inc. Studio O+A later described the Pacific Crest Trail as the link between Slack's two offices, in Vancouver and San Francisco.
Source: S-1/A 2019 · Studio O+A project page
No free-to-use photo found yet.Have one? We’d love to add it. - 2018 Ten floors at 500 Howard, themed on a trail
Studio O+A designed a multi-floor headquarters where each of 10 floors evokes a part of the Pacific Crest Trail, from the Baja desert on floor 2 to glaciers. SC Builders rebuilt it in three phases: a barista bar, a library, moss walls, an all-hands area and a full-service kitchen.
Source: Studio O+A · SC Builders
500 Howard Street (Studio O+A) · Photo: Garrett Rowland, Amy Young / Studio O+A - 2019 Going public from 500 Howard Street
Slack's principal executive offices were at 500 Howard Street, San Francisco, under a lease of 228,998 sq ft running to 2028. Headcount had grown from 716 (Jan 2017) to 1,664 (Apr 2019).
Source: S-1/A, May 31, 2019
No free-to-use photo found yet.Have one? We’d love to add it. - 2020 A second lease, then remote for good
The headquarters grew to 228,998 sq ft plus 210,573 sq ft on a lease to 2030. In June 2020 Slack said many employees could work remotely permanently; in December it agreed to merge with Salesforce.
Source: Form 10-K FY2020 and FY2021
No free-to-use photo found yet.Have one? We’d love to add it. - 2021 Part of Salesforce
Slack was acquired by Salesforce in 2021. Its last annual report put the headquarters at 230,208 + 210,573 sq ft and the team at 2,545 full-time employees.
Source: slack.com/about · Form 10-K FY2021
No free-to-use photo found yet.Have one? We’d love to add it. - 2026 Salesforce Tower
Slack Technologies, LLC lists its company address as 415 Mission Street, 3rd Floor — Salesforce Tower — and says its people work from Salesforce offices around the world.
Source: slack.com Help Center · slack.com/about
No free-to-use photo found yet.Have one? We’d love to add it.
| Annual report | HQ space (sq ft) | m² | As described |
|---|---|---|---|
| S-1/A 2019 | 228,998 | 21,275 | HQ, 500 Howard St (lease to 2028) |
| 10-K FY2020 | 439,571 | 40,838 | 228,998 (to 2028) + 210,573 (to 2030) |
| 10-K FY2021 | 440,781 | 40,950 | 230,208 (to 2028) + 210,573 (to 2030) |
Map: how the headquarters moved
Slack's two San Francisco addresses are a short walk apart in SoMa: the 10-floor HQ at 500 Howard Street, and Salesforce Tower on Mission Street, next to the Transit Center.
- 1 · 2019500 Howard Street — Headquarters at the 2019 IPO; 10 floors designed by Studio O+A.
- 2 · 2026Salesforce Tower, 415 Mission Street — Slack's company address today, 3rd floor.
Addresses: S-1/A 2019 · slack.com Help Center · Locations: OpenStreetMap
What Slack does
Slack is a messaging platform for work: channels, Slack Connect between companies, apps and AI agents. Salesforce bought it in 2021 and now calls it the AI-powered platform for work.
Part of Salesforce since 2021; Slack's own results were last reported for the year to January 31, 2021.
Where the money came from · revenue by location, FY2021
Source: Form 10-K FY2021 (39% of revenue generated outside the United States)
Source: Form 10-K FY2021 · slack.com/about (2026) · per-employee figure calculated by eciffo
Growth: revenue vs. people
$105.2M → $902.6M
716 → 2,545
Fiscal years end January 31. Revenue: S-1/A 2019 and Form 10-K FY2021 (selected financial data). Employees: S-1/A 2019 (Jan 2017) and Form 10-K FY2020–FY2021, full-time. Slack stopped reporting separately after joining Salesforce in 2021. Multiples calculated by eciffo.
Chief executives
Co-founder. CEO and Chairman from February 2009 through the IPO and the Salesforce merger.
Co-founders include Stewart Butterfield and Cal Henderson.
Source: S-1/A 2019, Management
Slack: questions people ask
Where is Slack's headquarters?
Slack Technologies, LLC lists its address as Salesforce Tower, 415 Mission Street, 3rd Floor, San Francisco, CA 94105. When it went public in 2019, its headquarters was at 500 Howard Street.
Source: slack.com Help Center · S-1/A 2019
Who designed Salesforce Tower?
Pelli Clarke & Partners (Cesar Pelli and Fred W. Clarke), with Kendall Heaton Associates as architect of record. It was completed in 2018 and is LEED Platinum.
Source: Pelli Clarke & Partners project page
How big is Salesforce Tower?
1,070 ft (326 m) tall with 61 storeys and 1.4 million sq ft (≈ 130,064 m²) of office space. The elevator ride to the 61st floor takes 39 seconds.
Source: salesforcetower.com/about
What was Slack's old office at 500 Howard Street like?
Studio O+A designed each of its 10 floors after a part of the Pacific Crest Trail, from desert cacti on floor 2 to a quiet library like a mountain lake on floor 5, with moss walls and a wall map of Lake Tahoe.
Source: Studio O+A · SC Builders
Does Slack allow remote work?
Yes. In June 2020 Slack announced many employees could work remotely permanently, and its job listings today are fully remote, in the office, or a mix of both.
Source: Form 10-K FY2021 · slack.com/careers
What benefits does Slack offer?
As part of Salesforce, U.S. employees get 26 weeks of paid parental leave for primary caregivers, 12 free therapy or coaching sessions a year, 15% off Salesforce stock, a 401(k) match up to $6,000 and 7 paid volunteer days.
Source: salesforcebenefits.com (linked from slack.com/careers)
How much do Slack engineers make?
2026 postings give a base salary of $207,800–$285,800 for a Senior Software Engineer and $237,700–$344,700 for a Staff Backend Engineer in select San Francisco and New York City metro cities, before bonus and equity.
Source: Slack job postings JR363198 and JR359771
How many people work at Slack?
2,545 full-time employees on January 31, 2021, the last count Slack published before joining Salesforce.
Source: Form 10-K FY2021
When was Slack founded, and when did Salesforce buy it?
It was incorporated in 2009 as Tiny Spec, Inc., took the name Slack Technologies in 2014, and was acquired by Salesforce in 2021.
Source: S-1/A 2019 · slack.com/about
You have seen the office, the benefits and the pay
Want to work at Slack?
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