Outbound infrastructure · United States

Cold outbound in United States_

As of 4 November 2026, 27,010 companies in United States send cold e-mail from dedicated sending domains; 1,560 added three or more in the last 30 days. Instantly is the most common infrastructure.

As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.

Companies with sending domains
27,010
Scaling now (3+ new domains, 30 d)
1,560
Most common provider
Instantly · 10,002
On Google Workspace
88%
Share of all outbound companies
66%
27,010companies in United States with sending domains
1,560added 3+ sending domains in the last 30 days
14providers identified from DNS
66%of all outbound companies we see
02 — Scaling now

Companies in United States adding the most sending domains

Rich profiles with a LinkedIn-known headcount only; portals and aggregators left out.

seoTunersSEO search marketing agencies · Thousand Oaks · United States+3 domains in 30 dTopcraft PrecisionPrecision CNC machining · Hudsonville · United States+4 domains in 30 dMassMailerMarketing automation email software · Dover · United States+3 domains in 30 dVoltage Media, IncPaid media performance agencies · Marina Del Rey · United States+3 domains in 30 dSTEEL HORSE LEATHERLeather goods makers · Brooklyn · United States+3 domains in 30 dCentral PlasticsInjection moulding · Tracy · United States+4 domains in 30 dIntrawest Machine and FabricatingPrecision CNC machining · Grand Junction · United States+3 domains in 30 dCANDID8AI recruiting talent software · United States+10 domains in 30 dMeeting Point Community AcupunctureAcupuncture tcm clinics · Denver · United States+3 domains in 30 dBurgerFiBurger restaurants · United States+5 domains in 30 dVertigraphConstruction estimating job management · Spokane · United States+9 domains in 30 dGraves Thomas Injury Law GroupPersonal injury law · Vero Beach · United States+6 domains in 30 dQuantikalPaid media performance agencies · United States+4 domains in 30 dXtreme CleansCarpet upholstery cleaning · Owings Mills · United States+6 domains in 30 dLighthouse Growth ConsultingPaid media performance agencies · United States+8 domains in 30 dElectronics Value RecoveryE waste recycling · Baltimore · United States+5 domains in 30 dB Line EventsEvent agencies · San Francisco · United States+19 domains in 30 dHR CloudHR management software · United States+4 domains in 30 dOceanside Mortgage CompanyMortgage & property finance · Toms River · United States+3 domains in 30 d
Authors UniteSelf publishing services · United States+25 domains in 30 d
1,560 companies in United States scaling outbound right now.

Filter by provider, size or industry and open the person running outbound, with a verified e-mail.

Free plan: 1,000 records, no card. The first 20 are above; e-mails are verified at the mail server when you open them.

03 — Infrastructure

Providers behind the sending domains in United States

Mailbox platform
companiesshare
Google Workspace
23,74888%
Microsoft 365
5,13319%
Other
1,9427%
By company size
companies · scaling
Self-employed
11,190 · 665
2-10 employees
6,410 · 348
11-50 employees
5,918 · 317
51-200 employees
2,305 · 142
201-500 employees
599 · 35
501-1000 employees
247 · 18
1001-5000 employees
235 · 30
5001-10000 employees
48 · 3
10,001+ employees
58 · 2
By industry
companies · scaling
Technology & software
10,450 · 595
Business & finance services
9,442 · 598
Property & construction
1,893 · 93
Consumer services & leisure
1,510 · 61
Manufacturing & industry
1,002 · 61
Media & content
815 · 57
Commerce & trade
470 · 30
Hospitality & travel
327 · 19
Health care
321 · 16
Transport, logistics & rental
278 · 11
Public, community & associations
227 · 0
Utilities & infrastructure
189 · 0
Automotive
72 · 0
Agriculture & forestry
14 · 0
Cite this

Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.

27,010 companies in United States run cold e-mail outbound from dedicated sending domains; 1,560 of them added three or more sending domains in the last 30 days. The most common infrastructure is Instantly (10,002 companies). (Breaknorm, 4 November 2026, https://breaknorm.co/outbound/united-states)
How we know

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 →

  • Sending domainsNew domains from certificate-transparency logs whose DNS carries cold-email infrastructure and which redirect to the company's site.
  • ProviderTracking CNAME, SPF include or MX record of the sending domain.
  • ScalingSending domains first seen in the last 30 days, counted per company.
FAQ

Cold outbound in United States: questions

How many companies in United States run cold outbound?

27,010 have at least one sending domain that redirects to them; 1,560 added three or more in the last 30 days.

How do you know?

Cold e-mail is sent from lookalike domains, never from the main domain. We read new domains from certificate-transparency logs, check their DNS for cold-email infrastructure and follow the redirect to the company.

Does absence mean no cold e-mail?

No. Teams sending from their main domain or through platforms without a DNS trace are not counted.

Companies and people

Get the outbound 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 scaling outbound in United States,
with the person who runs it

Filter on outbound and the country, and get 1,000 records free.

  1. 01Sign up, no card
  2. 02Connect Claude, ChatGPT or an API key
  3. 03Ask for your market, 1,000 records free