On usedby, 42 companies use Asana and 40 use Slack. 2 companies use both, including Spotify and Deepgram. Slack leads among the Artificial Intelligence companies on usedby that use either tool.Latest check Nov 13, 2026: 82 of 82 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses Asana, Slack, or both
Every company with a public proof for at least one of the two tools.
40
listed for Asana only
2
companies use both
38
listed for Slack only
On usedby, 40 companies are listed for Asana only, 38 are listed for Slack only and 2 use both, out of the 80 companies listed for at least one. An absent listing does not prove non-use.
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company | First public proof, Asana | First public proof, Slack |
|---|---|---|
 Spotify | — | — |
 Deepgram | On or before Nov 2026 | On or before Nov 2026 |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: Asana, 4 of 6; Slack, 4 of 6. Missing facts remain unverified, not absent features.
Asana
SlackWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Asana
cut down their stand-up meeting time by 50%, saving an hour or two every week
Figma
Vendor case study, asana.com, captured Nov 13, 2026
Epitaph Records increases efficiency by 5x with Asana
Epitaph Records
Vendor case study, asana.com, captured Nov 13, 2026
Slack
that would take someone more than an hour
Mural
Vendor case study, slack.com, captured Nov 12, 2026
saves me four to five hours each week
Isometric
Vendor case study, slack.com, captured Nov 12, 2026
Questions about Asana and Slack
Which is used more, Asana or Slack?
Asana has more customers on usedby: 42 against 40 for Slack.
Do companies use both Asana and Slack?
Yes. 2 companies use both on usedby, including Spotify and Deepgram.
Who uses Asana?
42 companies on usedby, each with the public page that shows it. See who uses Asana.
Who uses Slack?
40 companies on usedby, each with the public page that shows it. See who uses Slack.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.