Cold email sending

The sequence builder is the part of a cold email platform everybody compares and the part that decides nothing. Four things actually matter. Whether the tool charges per mailbox, because at volume deliverability depends on spreading sending thinly across many senders, and per-mailbox billing taxes exactly the behaviour that keeps you out of spam. Whether one client can contaminate another, which is what an agency tier is really selling with isolated sending servers and dedicated IPs. Where the domains come from, and the right answer is a different supplier, so that changing the sending tool never means rebuilding the estate. And what happens to a reply: a positive answer that sits unread for three days is a lost deal that shows up in reporting as a successful campaign. When comparing two plans, ignore the headline price and line up four numbers: emails a month, active leads, mailboxes and bundled enrichment credits. Active leads is the one that runs out first, because a lead stays active for the whole length of the cadence. Expect thirty to eighty dollars a month for a serious individual plan and several hundred for agency isolation. And check what the tool does when a mailbox starts failing, because that is the day the plan is tested.