Plans and billing

Mailgentic is priced on two things: inboxes and emails. An email is one recipient; a message to three people counts as three.

Plan	Inboxes	Emails / month	Overage	Shield	Price
Free	3 (shared domain)	3,000	none — sending stops at the limit	Basic: authentication + spam	$0
Developer	10	10,000	$2.00 per 1,000	Full: injection heuristics, DLP, caps, auto-suspend	$20 / mo
Startup	150	150,000	$1.50 per 1,000	Full + human approvals, dedicated IP pools	$200 / mo
Enterprise	custom	usage-based	$1.00 per 1,000	Full + in-region classifier, SSO, SLA	custom

Overage is billed monthly in arrears. Free is a hard stop; it never produces a bill.

What each plan includes

Protocols are never gated: REST, SMTP, IMAP, MCP, webhooks, SSE and WebSocket work on every plan including Free. Plans differ in how much control you get.

	Free	Developer	Startup	Enterprise
Own sending and inbound domains	shared `agents.mailgentic.ai` only	yes	yes	yes
Shield inbound verdicts (auth, spam, injection)	yes	yes	yes	yes
Shield outbound: DLP, hourly caps, recipient allowlist, auto-suspend	—	yes	yes	yes
Human approvals (held queue, tainted-thread holds)	—	—	yes	yes
AI auto-label and extraction	—	100k tokens / mo	1M tokens / mo	custom
Dedicated IP pool with automated warm-up	—	—	one included	as needed
Connected Gmail / Microsoft 365 inboxes	—	—	yes	yes
Message retention	30 days	90 days	1 year	custom
Audit log	view	view	view + export	export, SIEM feed
Support	community	email	priority	SLA, SSO, DPA, data-region pinning, in-region Shield classifier

The free trial

Signup is self-serve and needs no card. Until you add a paid plan, the account runs with three guard-rails:

shared agents.mailgentic.ai domain only (403 trial_domain otherwise),
50 sends per day (429 trial_daily_cap),
recipients limited to your own verified address — the one you signed up with (403 trial_recipient).

They exist so a brand-new account cannot spray mail from Mailgentic’s shared reputation. Adding a plan in Console → Billing lifts all three the moment the subscription is active.

Checking usage

curl "$API/v1/billing/usage"   -H "Authorization: Bearer $KEY"   # this month's metered usage
curl "$API/v1/billing/preview" -H "Authorization: Bearer $KEY"   # what this month will cost so far
curl "$API/v1/tenants/$TENANT_ID/usage" -H "Authorization: Bearer $KEY"   # per-tenant quota and rate usage

GET /v1/billing/export?format=csv&month=2026-10 returns a line-item export suitable for re-billing your own customers.

Method	Path	Scope	Purpose
`GET`	`/v1/billing/plans`	`read`	Available plans
`GET`	`/v1/billing/assignments`	`read`	Which plan applies to the account and to each tenant
`POST`	`/v1/billing/assignments`	`admin`	Assign a per-tenant rate card (for re-billing)
`GET`	`/v1/billing/usage`	`read`	Monthly metered usage
`GET`	`/v1/billing/preview`	`read`	Projected charges
`GET`	`/v1/billing/export`	`read`	JSON or CSV export

Subscribing and managing payment

Plans are purchased through Stripe Checkout, from the console (Billing → Plans & upgrade) or via the API:

curl -X POST "$API/v1/billing/checkout" -H "Authorization: Bearer $ADMIN_KEY" \
  -H "Content-Type: application/json" -d '{"plan_id": "PLAN_ID"}'
# → { "url": "https://checkout.stripe.com/..." }

curl -X POST "$API/v1/billing/portal" -H "Authorization: Bearer $ADMIN_KEY"
# → { "url": "https://billing.stripe.com/..." }   # cards, invoices, cancel

Completing checkout assigns the plan and lifts the free-trial guard-rails. Subscription changes and cancellations in the Stripe portal are mirrored automatically.

Per-tenant rate cards

If you re-bill your own customers, assign each tenant a rate card with POST /v1/billing/assignments. Usage is then metered per tenant against that card and shows up separately in /v1/billing/usage and the export. Rate cards do not change what Mailgentic charges you; they are for your invoicing.

Enterprise

Enterprise plans add SSO, an SLA, a DPA, audit-log export, data-region pinning, an in-region Shield classifier, and a proof of concept on your own scenario, including the compromised-agent, automatic-stop drill, live on your data. Talk to us.