What is a email warm-up?

The process of gradually increasing the volume of emails sent from a new email account to build a positive sending reputation with Internet Service Providers (ISPs) like Google and Microsoft. This significantly improves the chances of emails landing in the inbox instead of the spam folder.

Who uses one?

SDRs and founders running outbound cold email campaigns

What does it cost?

Pricing varies. The cheapest provider in our Top 11 starts around $149/mo. See the cheapest providers ranked.

How do I pick one?

Read the full methodology for our 9.4-point scoring framework, then look at the canonical The 11 Best Cold Email Software Tools. If you want a slice of the ranking by price, fit, or compliance, jump to: cheapest · highest-rated · fastest onboarding.

Source: Top 11 The 11 Best Cold Email Software Tools, verified June 21, 2026.