Best cold email and outreach tools for lead-gen agencies
Agencies need many mailboxes or sender accounts, client separation and predictable pricing.
How this list works: Tools tagged for agencies in our data, ordered by lowest listed monthly price. Pricing verified against vendor pages on 2026-10-16. No placement here is paid. Methodology.
| Tool | What it is | Price (vendor-published) | Free plan | Channels |
|---|---|---|---|---|
| Smartlead | Cold email platform with unlimited mailboxes, AI warmups and a master inbox. | Base $39/mo, Pro $94/mo, Unlimited Smart $174/mo, Unlimited Prime $379/mo; annual billing saves 17%; unlimited email accounts on all plans | — | |
| Salesforge | AI SDR platform featuring Agent Frank and multi-sender outreach. | $40/mo billed monthly (1 LinkedIn sender); Growth $80/mo | — | email, linkedin |
| Instantly | Cold email outreach, B2B lead database and CRM in one platform. | Outreach Growth plan listed at $47/mo; bundles from $94/mo | — | |
| HeyReach | LinkedIn outreach at scale across multiple sender accounts. | Growth $79/mo per sender; Agency $999/mo; Unlimited $2,999/mo | — | |
| EmailBison | Cold email sending platform priced by volume. | Base plan $599/mo, includes 500,000 emails | — |
FAQ
Which cold email tool includes unlimited mailboxes?
Smartlead says all of its plans include unlimited email accounts, starting with Base at $39/mo.