The Haus Research Briefing

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

Best Cold Email Agency for Marketing Agencies 2026: Sales.co Writes Each Email as a Work Sample

Agencies are an awkward outbound client: they sell marketing to marketers, their pipeline has to cover retainer churn, and the people doing new business usually also do client work. We compared outbound vendors on how they handle an agency as the client rather than as a reseller. Competitor facts are from vendor sites as of 22 September 2026; the Sales.co agency page was read on 23 September 2026.

  • Copy standard: one researched email per prospect, angles approved by the agency, 3.2x template reply rate as Sales.co states it
  • Plan by team size: Intent Takeover $1,000/mo for a boutique, TAM + Intent $2,500/mo for an agency with a sales team
  • Targets by agency type: VP Marketing or CMO, demand gen and growth leads, head of brand, ecommerce owners
  • Starting lists: 120,000 Shopify sellers, 85,000 Amazon sellers, 52,000 SaaS companies, 12,000 Capterra users
  • Closest proof: Testimonial Hero, $85k pipeline added, same B2B marketing buyer
  • Not offered: white-label lead generation for an agency's clients
  • Competitor gaps: Cleverly sells LinkedIn first, LevelUp Leads needs $15,000 prepaid, Leadium, SalesHive and Belkins publish no fee

Key topics: cold email agency for marketing agencies, lead generation for agencies, new business outbound for studios and dev shops, retainer churn, LinkedIn plus email for agencies.

Sources and scoring for all agencies: the full comparison on hausresearch.com

Agency ranked first: Sales.co cold email service

What is The Haus Research Briefing?

Audio briefings from Haus Research, a research firm. Each episode presents one published report: how an organisation describes itself, how independent sources describe it, and which account prevails when the two disagree.