Slack VS WhatsApp
As of 4 November 2026, WhatsApp is named by 1,762 companies and Slack by 5,079; Slack skews to companies under 200 people (63% vs 48%), WhatsApp to companies over 1,000 (21% vs 12%).
As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
The website-and-DNS footprint is not comparable between a marketing suite and a CRM: Slack's script and mail records show on hundreds of thousands of small sites, WhatsApp rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- Slack: 2–200 employees
- 63%
- WhatsApp: 2–200 employees
- 48%
- Slack: 1,000+ employees
- 12%
- WhatsApp: 1,000+ employees
- 21%
- Postings per company, 90 days
- 3.3 · 2.2
- Website or DNS footprint
- 15,520 · 0
Who chooses which
Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.
| Segment | Slack | share | share | Leans | |
|---|---|---|---|---|---|
| Self-employed | 286 | 6% | 82 | 5% | even |
| 2-10 employees | 764 | 15% | 232 | 13% | even |
| 11-50 employees | 1,195 | 24% | 298 | 17% | Slack |
| 51-200 employees | 1,260 | 25% | 313 | 18% | Slack |
| 201-500 employees | 607 | 12% | 292 | 17% | |
| 501-1000 employees | 375 | 7% | 172 | 10% | |
| 1001-5000 employees | 387 | 8% | 204 | 12% | |
| 5001-10000 employees | 75 | 1% | 64 | 4% | |
| 10,001+ employees | 130 | 3% | 105 | 6% |
| Segment | Slack | share | share | Leans | |
|---|---|---|---|---|---|
| Technology & software | 2,217 | 44% | 342 | 19% | Slack |
| Business & finance services | 1,100 | 22% | 400 | 23% | even |
| Media & content | 331 | 7% | 107 | 6% | even |
| Consumer services & leisure | 300 | 6% | 175 | 10% | |
| Manufacturing & industry | 259 | 5% | 106 | 6% | even |
| Public, community & associations | 247 | 5% | 77 | 4% | even |
| Commerce & trade | 178 | 4% | 189 | 11% | |
| Health care | 133 | 3% | 71 | 4% | even |
| Property & construction | 96 | 2% | 76 | 4% | |
| Hospitality & travel | 73 | 1% | 64 | 4% | |
| Utilities & infrastructure | 55 | 1% | – | – | outside top 12 |
| Transport, logistics & rental | 53 | 1% | 48 | 3% | even |
| Automotive | – | – | 63 | 4% | outside top 12 |
| Segment | Slack | share | share | Leans | |
|---|---|---|---|---|---|
| United States | 3,493 | 69% | 397 | 23% | Slack |
| United Kingdom | 325 | 6% | 119 | 7% | even |
| Germany | 199 | 4% | 119 | 7% | |
| Canada | 122 | 2% | 26 | 1% | even |
| France | 96 | 2% | 34 | 2% | even |
| Japan | 70 | 1% | – | – | outside top 12 |
| India | 64 | 1% | 138 | 8% | |
| Australia | 53 | 1% | 21 | 1% | even |
| Netherlands | 40 | 1% | 45 | 3% | even |
| Brazil | 39 | 1% | 419 | 24% | |
| Poland | 35 | 1% | – | – | outside top 12 |
| Spain | 31 | 1% | 42 | 2% | even |
| United Arab Emirates | – | – | 30 | 2% | outside top 12 |
| Singapore | – | – | 25 | 1% | outside top 12 |
| Segment | Slack | share | share | Leans | |
|---|---|---|---|---|---|
| Marketing & communications | 3,971 | 18% | 671 | 12% | Slack |
| Software engineering | 2,196 | 10% | 166 | 3% | Slack |
| Sales | 1,711 | 8% | 1,161 | 21% | |
| IT operations & business systems | 1,340 | 6% | 53 | 1% | Slack |
| Customer service & success | 1,299 | 6% | 424 | 8% | even |
| Administration & office | 1,067 | 5% | 252 | 5% | even |
| Product, program & project management | 1,004 | 5% | 126 | 2% | Slack |
| Data & AI | 671 | 3% | 77 | 1% | even |
| Human resources | 551 | 3% | 69 | 1% | even |
| Finance & accounting | 501 | 2% | 66 | 1% | even |
| Design & UX | 387 | 2% | 40 | 1% | even |
| Healthcare clinical | 319 | 1% | 11 | 0% | even |
| Business development & strategy | 306 | 1% | 60 | 1% | even |
| Unclassified | 306 | 1% | 32 | 1% | even |
| General management & consulting | 302 | 1% | 24 | 0% | even |
| Logistics warehouse and transport | 249 | 1% | 508 | 9% | |
| Arts media and entertainment | 245 | 1% | 23 | 0% | even |
| Legal, compliance & risk | 239 | 1% | 16 | 0% | even |
| Engineering (non-software) | 214 | 1% | 15 | 0% | even |
| Education & training | 165 | 1% | 88 | 2% | even |
| Retail & store operations | 150 | 1% | 232 | 4% | |
| Social care and community | 140 | 1% | 28 | 1% | even |
| Hospitality and food service | 128 | 1% | 50 | 1% | even |
| Facilities cleaning and security | 125 | 1% | 10 | 0% | even |
| Travel, leisure & events | 123 | 1% | 39 | 1% | even |
| Healthcare support and caregiving | 120 | 1% | – | – | outside top 12 |
| Skilled trades and field service | 101 | 0% | 17 | 0% | even |
| Manufacturing and production | 81 | 0% | – | – | outside top 12 |
| Real estate and property | 69 | 0% | 25 | 0% | even |
| Construction and civil | 58 | 0% | 5 | 0% | even |
| Agriculture and environment | – | – | 7 | 0% | outside top 12 |
| Quality, safety & environment | – | – | 6 | 0% | outside top 12 |
The companies behind each column
Companies using Slack →
Companies using WhatsApp →
Team chat ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
WhatsApp is named by 1,762 companies in job postings and Slack by 5,079; 0 name both. (Breaknorm, 4 November 2026, https://breaknorm.co/compare/slack-vs-whatsapp)
Read from the source, not self-reported
Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →
- Job postingsRead hourly from career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
- Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
- SegmentsCountry, size and industry from the company profile built from its website.
- Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
Slack vs WhatsApp: questions
Which is more used, Slack or WhatsApp?
By companies naming it in their own job postings, Slack (5,079) over WhatsApp (1,762). By website-and-DNS footprint, Slack (15,520 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses Slack?
63% of Slack companies have 2 to 200 employees, against 48% for WhatsApp. 12% of Slack companies have over 1,000 employees, against 21% for WhatsApp.
Do companies run both?
0 companies name both in their postings, usually Slack in marketing and WhatsApp in sales, or during a migration.
Where do these numbers come from?
From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.
Get either list your way
The same data as a search, over MCP and the API, as bulk files, or pushed to you as it changes.
Every company on either tool,
with the person who owns it
Filter on Slack or WhatsApp. Start free, no card.