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. If you're expanding an existing plan rather than starting fresh, see Adding more mailboxes to your plan for the step-by-step add-on flow.
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.