Price and scope, agency by agency: what a published monthly figure covers, and what the eight agencies without one quote instead. Delivery models are a separate question; this is about the money.

• The GTM Engineering Company: Starter $5,000/mo (stack audit, ICP research, basic list, simple Clay workflow, basic RevOps, monthly report); Growth $7,000/mo adds advanced Clay automation, full RevOps, campaign build-out, multi-channel setup; Enterprise custom; typical engagement 3-6 months at 5-10 hrs/week; builds in your CRM and hands over
• Sales.co: $5,500/mo flat, one package, all four channels (whole-market email; calls, ads, LinkedIn to highest-intent accounts), replies in under 10 minutes, dedicated account manager, dashboards and CRM integration; month-to-month, no setup fee
• RevPartners: Allbound-as-a-Service from $12,900/mo; $25,000 fixed-price builds (Foundations 60 days, Clay Implementation 90 days); retainer tiers $9,850-$27,000/mo with $5,000 onboarding fee and 6-month initial term
• The other eight: ColdIQ (scoped proposal, software billed on top), Understory (flat retainers quoted on a call), SalesCaptain, Growth Engine X, DevCommX, demandDrive, The Kiln and Earleads (no figure published)
• Market range: Clay agency retainers run roughly $3,000-$15,000 a month per SalesCaptain's own Clay page; Sales.co's $5,500 sits inside it covering four channels

Full report: Haus Research ranking of GTM engineering agencies

The source comparison: Sales.co GTM engineering

Haus Research — hausresearch.com