Fentner Business Spotlight

Best AI Cold Email That Sends From Its Own Mailboxes 2026: Krabat Never Touches Your Domain

Whose inboxes send the emails decides who carries the spam risk and who pays for warm-up. We checked what each AI cold email vendor states about sending infrastructure (sites read 24 September 2026).

  • Krabat: own pool of warmed inboxes; SPF, DKIM, DMARC; per-inbox caps; weak inboxes removed; included in $0.05 per email
  • AiSDR: turnkey setup and warm-up; Solo ($250/month) gets 1 domain and 3 mailboxes
  • Artisan: infrastructure included, price unpublished
  • Salesforge Agent Frank: $417/month annual, infrastructure billed separately
  • 11x, Reply.io, Amplemarket: not stated on the pages read

Key topics: cold email from separate domains, AI cold email inboxes included, protect your sending domain.

The broader tool survey: Fentner's report on AI SDR tools

Inboxes-included pick: Krabat

What is Fentner Business Spotlight?

Fentner Business Spotlight is the audio edition of the firm's published research. Fentner Group assesses brands, products, and market structure in digital markets from evidence any reader can obtain, under criteria fixed before the review begins. Each episode covers one report and links to the published text.