Yes. You can choose the billing style that suits you from the Packages & Add-ons page, which has two options: a flexible Custom plan, or ready-made Packages.
Custom plan (flexible, monthly)
A flexible monthly plan where you choose exactly how many Maildoso (SMTP) mailboxes and domains you want, using the sliders. (Google Workspace mailboxes are currently unavailable for new purchases — see note below.)
Mailboxes are added in bundles (minimum 10 at a time), and the per-mailbox price depends on how many you have in total — larger volumes get a better per-mailbox rate. See How much do SMTP mailboxes cost? Volume pricing tiers for the exact rates.
On the Custom plan, domains are purchased separately at $12 per domain, per year (a fixed price, with no volume discount).
Packages (fixed-size bundles)
Packages are ready-made bundles at a fixed mailbox count, rather than a slider you configure yourself — a good fit if you want a set size instead of building your own. There are two package types, shown as tabs on the Packages & Add-ons page:
Monthly packages
30 mailboxes — $2.50/mailbox, $75/mo total
300 mailboxes — $0.75/mailbox, $225/mo total
1,000 mailboxes — $0.49/mailbox, $499/mo total
Monthly package rates follow the same volume pricing as the Custom plan — domains aren't included and are purchased separately, same as on the Custom plan.
Quarterly packages (legacy)
Quarterly packages are a legacy plan type — still available and fully supported, but no longer the default option. Unlike the Custom plan and Monthly packages, quarterly packages include a set number of domains at no extra cost:
32 mailboxes — $3.10/mailbox, $299/quarter (~$99/mo), 8 domains included free
68 mailboxes — $2.40/mailbox, $499/quarter (~$166/mo), 17 domains included free
400 mailboxes — $1.80/mailbox, $2,199/quarter (~$733/mo), 100 domains included free
Because quarterly packages bundle domains in, the per-mailbox rate is higher than the equivalent Monthly package or Custom plan tier — factor in the included domains when comparing total cost, not just the per-mailbox price.
Note: New Google Workspace mailbox purchases are paused for the time being. If you already have Google Workspace mailboxes, your existing plan, billing, and support are unaffected — Google Workspace mailboxes continue to be billed monthly as before. Exact package sizes, prices, and domain allowances can change — always check the Packages & Add-ons page for current numbers before subscribing or comparing. For how mailbox and domain charges appear on your bill, see Understanding your bill: mailbox plans vs. domain charges.