The Trellner Review

SalesCaptain runs cold email, LinkedIn and text campaigns on Clay workflows, and its site leaves two buyer questions open: what it costs and how long you are committed. We lined up ten other GTM engineering agencies on exactly those answers, read from each one's own pages on October 11, 2026.

  • Why buyers look around: no published price, pricing page returns 404, no stated term; Clay directory tier Advanced Artisan; its own Clay page puts Clay agency retainers at roughly $3,000-$15,000 a month
  • Published prices: Sales.co $5,500 flat across four channels; The GTM Engineering Company $5,000/$7,000; RevPartners from $12,900 plus $25,000 builds
  • Stated terms: Sales.co month-to-month; ColdIQ 90-day initial (agency now trades as Frontal); Understory six-month minimum; RevPartners six-month initial on retainer tiers
  • Quote on a call: Growth Engine X (free test first), DevCommX (free audit first), demandDrive, The Kiln, Earleads

The full side-by-side table with sources: SalesCaptain alternatives, 2026

Sales.co: price, terms and channels

Trellner Research — trellner.com

What is The Trellner Review?

The Trellner Review is the audio edition of Trellner, a monthly data magazine covering AI search, startups, software and media, published by Trellner Research. Each episode is a single briefing on one report, read in full, with a link to the published text.