List building agencies for B2B services firms
3 agencies in the index offer list building for B2B services firms. Ranked by the evidence on record, the first three are SalesHive (US, from $5,000 a month), Sopro (Brighton, UK) and SalesBread (US, from $3,000 a month). Contact data decays every month, so ask how emails and phone numbers are verified and how often the list is refreshed. Services are bought on trust and fit, so outreach that shows relevant client names and a clear first step works better than a product-style pitch. 2 of the 3 publish a monthly minimum, from $3,000 to $5,000, with a median of $4,000. None of them advertise pay-per-meeting or pay-per-lead pricing. Besides list building, the services most often offered here are cold email, LinkedIn outreach and appointment setting. 0 build on Clay, 0 work inside HubSpot and 3 use their own or undisclosed tools. 2 have a Clutch or G2 rating on file with the date it was read. Before signing, ask for a sample sequence, the definition of a qualified meeting and who owns the domains and data afterward.
| # | Agency | HQ | Stack | From (monthly) | Model | Proof | Badges |
|---|---|---|---|---|---|---|---|
| 1 | SalesHive↗ US-based SDRs; Starter $5k/mo, Growth $8k, Crush $12k; month-to-month | US | Custom | $5,000 | Retainer | G21.3 (4) | Verified DeliverabilitySDR PodEditor's Pick |
| 2 | Sopro↗ Also runs a Miami entity | Brighton, UK | Custom | Ask | Not published | G24.9 (17) | Top Outbound Agency UK 2026 |
| 3 | SalesBread↗ Manual LinkedIn outreach; ~$3k/mo + setup, month-to-month | US | Custom | $3,000 | Retainer | n/a | none |
Want two or three picks for your budget? Find your agency. A person replies within 24 hours.
What differs for B2B services buyers
- Buying cycle:30-90 days; the buyer is often the owner or a department head.
- Budget:2 of the 3 publish a monthly minimum, from $3,000 to $5,000, with a median of $4,000.
Related pages
Questions
- How much does a list building agency cost?
- 2 of the 3 publish a monthly minimum, from $3,000 to $5,000, with a median of $4,000. Setup fees and minimum terms vary, so ask for both before comparing monthly prices.
- Retainer or pay-per-meeting?
- A retainer buys an agreed scope each month and suits a defined ICP with at least three months of runway. Pay-per-meeting moves the risk to the agency and suits offers with a short sales cycle. On this page, 0 agencies offer pay-per-meeting pricing and 0 pay-per-lead.
- How long until results?
- New sending domains need two to three weeks of warm-up before volume goes out, and list building runs alongside it. Most agencies quote first meetings in weeks four to eight.
- Does the stack matter?
- 0 of the 3 build on Clay and 0 work inside HubSpot. Ask who owns the sending domains, the data and the workflows when the engagement ends; some agencies hand them over and some keep them.