Outbound infrastructure

Who runs cold e-mail outbound_

As of 4 November 2026, 41,072 companies send cold e-mail from dedicated sending domains; 2,233 added three or more domains 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
41,072
Scaling now (3+ new domains, 30 d)
2,233
Most common provider
Instantly · 14,067
On Google Workspace
86%
Countries with a page
25
41,072companies with cold-email sending domains
2,233added 3+ sending domains in the last 30 days
22infrastructure providers identified from DNS
25country maps
02 — Scaling now

Companies adding the most sending domains in the last 30 days

A team that adds sending domains is raising volume or hiring SDRs: the earliest public sign of an outbound push. Rich profiles with a LinkedIn-known headcount only.

TikkelTime attendance software · Belgium+6 domains in 30 dseoTunersSEO search marketing agencies · Thousand Oaks · United States+3 domains in 30 dSummit Search ConsultantsExecutive search firms+6 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 dFellowMeeting transcription software · Ottawa (Overbrook) · Canada+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 dSmart Currency ExchangeCurrency exchange & money transfer · Ravenscourt Park · United Kingdom+4 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 dLexroomLegal tech software · Milano · Italy+20 domains in 30 dSeleqtSales prospecting software · Netherlands+3 domains in 30 dQuantikalPaid media performance agencies · United States+4 domains in 30 dArtilecSecurity & av equipment webshops · Huechuraba · CL+3 domains in 30 d
2,233 companies scaling outbound right now.

Filter by country, provider, size or industry and open the person running outbound, with a verified e-mail. Or get the new ones weekly.

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03 — Infrastructure

Which provider their sending domains run on

Identified from the DNS of the sending domains: tracking CNAME, SPF include or MX. Click a provider for its own page.

Mailbox platform behind the sending domains
companiesshare
Google Workspace
35,49486%
Microsoft 365
8,20320%
Other
3,1118%
By company size
companies · scaling
Self-employed
15,674 · 884
2-10 employees
10,530 · 542
11-50 employees
9,513 · 489
51-200 employees
3,540 · 193
201-500 employees
928 · 52
501-1000 employees
392 · 29
1001-5000 employees
337 · 36
5001-10000 employees
68 · 3
10,001+ employees
90 · 5
By industry
companies · scaling
Technology & software
15,318 · 824
Business & finance services
14,665 · 867
Property & construction
2,568 · 137
Consumer services & leisure
2,398 · 96
Manufacturing & industry
1,838 · 90
Media & content
1,253 · 78
Commerce & trade
842 · 46
Hospitality & travel
451 · 24
Transport, logistics & rental
438 · 17
Health care
432 · 20
Public, community & associations
352 · 10
Utilities & infrastructure
352 · 16
04 — By country

Cold outbound by country

Companies with sending domains, and how many are scaling now. Each country has its own page.

Cite this

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

41,072 companies run cold e-mail outbound from dedicated sending domains, as read from DNS and certificate-transparency logs; 2,233 of them added three or more sending domains in the last 30 days. The most common infrastructure is Instantly (14,067 companies) and 86% of the sending domains sit on Google Workspace. (Breaknorm, 4 November 2026, https://breaknorm.co/outbound)
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; 'generic' setups without provider proof are not shown here.
  • ScalingSending domains first seen in the last 30 days, counted per company.
  • Company listRich profiles with a LinkedIn-known headcount; portals, aggregators and non-organisations left out.
FAQ

Cold outbound: questions

How do you know a company runs cold outbound?

Cold e-mail is sent from lookalike domains, never from the main domain, and those domains redirect to the company's site. We read new domains from certificate-transparency logs, check their DNS for cold-email infrastructure (the tracking CNAME, SPF include or MX of a provider such as Instantly, Smartlead or Zapmail) and follow their redirect. A company is marked when at least one such domain points at it.

What does “scaling now” mean?

Three or more new sending domains first seen in the last 30 days. Teams add sending domains when they raise volume or hire SDRs, so it is the earliest public signal of an outbound push.

Does absence mean a company sends no cold e-mail?

No. We only mark companies whose sending domains we found. Teams sending from their main domain or through platforms without a DNS trace are not counted.

Can I get the list?

Yes: the filter is “outbound” in the product, with provider, mailbox platform, number of sending domains and first/last seen dates. The 20 most active companies are on this page.

Companies and people

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