Slack Technologies Inc
ActiveBusiness · San Francisco, CA
At a glance
Public records place Slack Technologies Inc at 2 active locations in 2 San Francisco office buildings. Locations include 45 FREMONT ST (FL 31ST); 500 HOWARD ST.
Public record — San Francisco
Office locations (2 active)
| Building | Suite / floor | Submarket | Since | Source | Match |
|---|---|---|---|---|---|
| 45 FREMONT ST | FL 31ST | San Francisco | Mar 1999 | SF registered business | address · medium |
| 500 HOWARD ST | — | San Francisco | Mar 1999 | SF registered business | address · medium |
Where does Slack Technologies Inc operate in San Francisco?
The earliest active record dates from Mar 1999 and the most recent from Mar 1999.
Across San Francisco, 9,124 active business locations are matched to office buildings; Slack Technologies Inc accounts for 2 of them.
How does BuildingCensus know Slack Technologies Inc is at these addresses?
Each location is a business record whose premises address was matched to a county office parcel (record types on this page: SF registered business). The match method and confidence are shown on every row.
A record at an address is evidence that the business operates there, not a lease: records lag moves by months, and businesses without a local record at an address do not appear.
Frequently asked questions
Where are Slack Technologies Inc's offices in San Francisco?
Public records place Slack Technologies Inc at 2 active locations in San Francisco: 45 FREMONT ST (FL 31ST); 500 HOWARD ST.
How long has Slack Technologies Inc been at its San Francisco locations?
The earliest active record starts Mar 1999; the newest Mar 1999. Start dates are when the record was opened, which can trail the actual move-in.
Related
Data provenance — public records only
- San Francisco — Assessor secured roll (use classes, stories, areas, assessed values — California law excludes owner names from open data, and no bulk sale-price source exists), the universal registered-business roll with suite-level addresses, and current energy benchmarking joined by parcel.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
Dataset updated . Locations from San Francisco business records matched to county office parcels.
About this data
Source: Assessor secured roll (San Francisco), as published October 11, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Slack Technologies Inc — San Francisco office locations”, https://buildingcensus.com/offices/sf/companies/slack-technologies-inc (data as of October 11, 2026).