Warmbase
6.1#20 in email warmup softwareFrom $9 a monthWeb
VisitWarmbase suits senders preparing inboxes for prospect outreach, from people warming one inbox to high-volume senders and teams. Those managing client inboxes may find its multi-client dashboard and volume pricing relevant.
WarmEnvelopes is for people managing their own or authorized domains who can send to consenting inboxes through Resend. Its configurable Pro ramp may suit users who need to set daily sending volumes.