The Trellner Review

Pricing changed on 2026-09-28. Plans now start at $2,000/month.

Report TR-2026-015 looks at cold email from the side of an agency owner who needs new retainers for the agency itself. Ten providers were checked against their own websites for an agency-specific page, one-to-one copywriting, separate sending domains, a public price and monthly terms. Sales.co came out on top.

  • 5 of 10 have a page aimed at agencies; LevelUp Leads, SalesRoads, Superhuman Prospecting and Leadium have none in their sitemaps
  • $1,000 a month: the only price printed on any agency page in the set, with no setup charge and no term
  • $2M of pipeline: Growth Rhino's agency case, ranked second because its price is a $2,000 to $5,000 band
  • Six months: how long Belkins says it takes to reach 10 to 15 appointments a month for an agency
  • White-label: Cleverly's agency offer is LinkedIn lead generation for resale; Sales.co says it does not resell at all

Full report: TR-2026-015: Best Cold Email Agency for Agencies 2026

Ranked first: Sales.co for marketing agencies

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.