Mailpool vs Zapmail: provider choice or pre-warmed inventory?

Partner disclosure: Arrel partners with Mailpool and may benefit commercially if you choose it. We use official documentation for both vendors and make the case for Zapmail where its price or product fits better.

Our short answer: Zapmail has the lower first-year price for many standard Google and Microsoft fleets. Its $99 monthly Growth plan includes 30 mailboxes, compared with $120 for 30 Google or $150 for 30 Microsoft inboxes on Mailpool. Mailpool gives you per-inbox entry, its own $3 managed inbox, dedicated infrastructure and stronger published team roles. Check Zapmail's second-year price before buying because the vendor documents a large automatic renewal change after month twelve.

Zapmail says its standard Google and Microsoft pricing uses an introductory first-year provider rate. After twelve months, its help center lists Starter at $59 per month plus $6 per mailbox, Growth at $169 plus $5.50 per mailbox and Pro at $499 plus $5 per mailbox. Ask Zapmail for the exact all-in renewal invoice before committing a large fleet.

Zapmail's first-year bundles are competitive

Zapmail Starter costs $39 monthly for ten inboxes, Growth costs $99 for 30 and Pro costs $299 for 100. Google and Microsoft use the same plan table. Quarterly totals are $105, $270 and $810. Annual totals are $390, $990 and $3,000, equal to $32.50, $82.50 and $250 per month.

Extra mailboxes cost $3.50, $3.25 or $3 monthly depending on the plan. The official API documentation lists lower effective annual add-on rates of $3.25, $2.75 and $2.50. Pro expressly includes API access, priority support and 30 monthly credits each for delivery tests and AI Insights. Starter includes three of each and Growth includes ten, but their public cards do not list API access.

Mailpool prices official accounts individually. Its Google rate is $4 monthly or $3.40 annual-equivalent. Microsoft is $5 or $4.30. The managed Mailpool inbox costs $3 or $2.60. Those figures make Mailpool easier to start below ten accounts, while Zapmail usually costs less at its 30- and 100-inbox first-year tiers.

Second-year pricing can change the winner

Zapmail's renewal article says Google and Microsoft discounts end after each mailbox has been active for twelve months. The documented replacement prices combine a higher base plan with a higher mailbox rate. The wording leaves room for billing interpretation, so get a written renewal example for your exact mailbox count. A year-one saving can disappear if you keep the infrastructure for several years.

Mailpool does not publish a comparable second-year step-up. Domain prices vary on both platforms. Zapmail shows the price in the cart by TLD, domain type and registration length. Mailpool also leaves the domain amount to checkout and registers purchases for one-year periods.

Zapmail sells pre-warmed inventory with strict lifecycle rules

Zapmail's pre-warmed Starter costs $39 in month one and then $24 per month for three mailboxes on one domain. Growth costs $149 and then $84 for twelve mailboxes on four domains. Pro costs $339 and then $180 for thirty mailboxes on ten domains. Extra mailboxes cost $8, $7 or $6 monthly. Extra domains cost $15 per year.

Those assets expire after twelve months and cannot be renewed. Zapmail also says changing a mailbox username removes its warmup history. The product helps teams that need inventory with prior activity, but it does not remove the need for conservative sending. Standard Zapmail mailboxes arrive fresh and need an external warmup process.

Operational limits matter for agencies

Zapmail gives buyers Google and Microsoft admin credentials and isolates one domain per workspace. It recommends three mailboxes per domain, with five as the maximum. Mailbox assignment closes 24 hours after a workspace starts; later additions wait for the next billing cycle or require a new domain. There is no fixed platform maximum, but purchased slots and provider rules still apply.

Mailpool supports multiple client workspaces, unlimited invited members and Owner, Admin and Member roles. Its API covers domains, DNS, mailbox batches and status. Zapmail also publishes an API with workspace headers, but its public plan page reserves API access for Pro. Confirm access before building an automated provisioning flow.

Both products stop at infrastructure

Mailpool and Zapmail provision accounts and export them. A separate sequencer runs campaigns, follow-ups and replies. Standard Zapmail inboxes also need a warmup tool; Mailpool integrates with external sending and warmup products. Price the sequencer, domains, warmup, placement testing and year-two renewal alongside the mailboxes.

Official sources

• Mailpool pricing, billing and workspace controls
• Zapmail plans, subscription API pricing, renewal pricing and pre-warmed rules

For another official-provider comparison, read Mailpool vs Primeforge. For private infrastructure, see Mailpool vs Infraforge.