Email warmup tools compared. Which one actually works best?
warmup_wiz · 2026-03-10 · 1,180 views
Tested 4 warmup tools over the past year. Each tested for 30 days on identical Google Workspace inboxes from the same provider. Here is the honest comparison.
Instantly (built-in warmup): Convenient since it is part of the sending platform. Warmup network is large. Inbox placement after 30 days: 87%. Downside: you are locked into Instantly's ecosystem.
MailReach: Dedicated warmup tool. More control over warmup settings. Inbox placement after 30 days: 91%. Best reporting and analytics. Downside: separate cost ($25/inbox/month) on top of your sending platform.
Warmbox: Good budget option. Inbox placement after 30 days: 83%. Interface is clean. Downside: smaller warmup network means less diverse engagement signals.
Lemwarm: Part of the Lemlist ecosystem. Inbox placement after 30 days: 85%. Works well if you are already on Lemlist. Downside: expensive if used standalone.
My recommendation: If you use Instantly, their built-in warmup is good enough for most people. If you want the absolute best warmup results and do not mind paying extra, MailReach is the winner. If budget is tight, Warmbox gets the job done.
One important note: warmup tools help, but they cannot fix bad infrastructure. If your DNS is misconfigured or you are on shared SMTP, no warmup tool will save your deliverability. Fix the foundation first, then warmup becomes the cherry on top.
Comments (4)
coldkingdom · 2026-03-11
the fact that you tested on identical inboxes from the same provider makes this actually useful. most warmup comparisons are garbage because they test on different infrastructure. mailreach at 91% vs warmbox at 83% is a meaningful difference
scrappyscott · 2026-03-11
$25/inbox/month for MailReach adds up fast if you have 30+ inboxes. that's $750/month just for warmup. Instantly's built-in warmup at 87% placement is probably good enough for most people and saves a ton of money
noobsender · 2026-03-12
wait so I need a warmup tool AND a sending platform? I thought warmup was included in Instantly. or are you saying MailReach is for people who don't use Instantly?
warmup_wiz · MailReach · 2026-03-13
@noobsender If you use Instantly, their built-in warmup is fine for most cases. MailReach is for people who want the best possible warmup results regardless of sending platform, or who use platforms without built-in warmup (like Saleshandy older plans or custom setups). For most people starting out, Instantly's warmup is plenty good.