MailKite
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Pricing

Pay only when a product takes off.

Unlimited domains on every plan. Inbound and outbound share one quota. Cross it and we meter overage gracefully — never a hard cut. Start free, no credit card.

Free

$0 /month

For your next side project — and the one after that.

3,000 emails / mo
inbound + outbound combined
Start building free
  • Unlimited domains
  • Managed subdomain to start in seconds
  • Inbound → webhook (full parsed JSON)
  • Send API + API key for your SDKs & agents
  • Inbox agents — bring your own AI key, free
  • 3-day message retention
  • Community support
Most popular

Pro

$20 /month

For a product with real traffic.

50,000 emails / mo
then $0.50 / 1k — no hard cut
Start Pro
  • Everything in Free
  • 30-day retention
  • Signed webhooks (HMAC)
  • Replay & automatic retries
  • Platform AI — $0.10 / action (or BYO key, free)
  • Email support

Scale

$99 /month

For a business sending at volume.

250,000 emails / mo
then $0.40 / 1k
Start Scale
  • Everything in Pro
  • 90-day retention
  • Dedicated IP option
  • Platform AI — $0.10 / action (or BYO key, free)
  • Priority support

Business

$399 /month

For teams that need controls and an SLA.

1,000,000 emails / mo
then $0.30 / 1k
Start Business
  • Everything in Scale
  • SSO
  • Uptime SLA
  • Platform AI — $0.10 / action (or BYO key, free)
  • Webmail seats included

Prices are monthly. Annual billing saves roughly two months. Add-ons: dedicated outbound IP (Scale+) and hosted webmail seats.

Enterprise

Volume beyond Business, region pinning, dedicated infrastructure, custom contracts, and security review. Volume discounts apply — our cost advantage compounds at scale, and we pass it on.

Talk to us
On every plan

Graceful by default

The things competitors charge extra for — or cut you off over — are standard here.

Unlimited domains

No per-domain fees, ever. Run every product you ship from one account.

Never a hard cut

Cross your quota and we meter the overage gracefully — soft-pause with notice on Free, metered on paid. No silent bans, no cliffs.

Inbound + outbound, one quota

Received and sent mail share the same allowance. No separate inbound bill, no assembly required.

AI you control

Inbox agents run on Claude. Bring your own Anthropic key and AI is free — we never bill it. Or use our platform at a flat $0.10 per action, no bundles, no tiers.

No credit card to start

Sign up, point a domain, send your first email. Add a card only when a product crosses the free tier — or to register a new domain at cost + a small fee.

Questions

How is usage counted?

One quota covers both inbound and outbound — every message received as a webhook and every message you send counts once. Domains are always free; you never pay per domain.

What happens when I go over my plan?

Nothing breaks. On Free we soft-pause with notice and a one-click upgrade. On paid plans we meter overage at the plan's per-1,000 rate — no hard cutoff, no service interruption mid-send.

How is AI priced?

Simple and pay-as-you-go: $0.10 per AI action — one inbox-agent run over one email — the same on every paid plan, no bundles or token math. Prefer your own Anthropic key? Add it in the dashboard and AI is free; we never bill it.

Can I register a domain through MailKite?

Yes. Register a brand-new domain right from the dashboard and we set up the mail DNS automatically. You're charged the registrar's price plus payment processing and a small flat fee — shown before you confirm.

Do you really not charge per domain?

Correct. Spin up as many domains and addresses as you want on any plan, including Free. You only pay for volume once a product actually takes off.

Can I get a dedicated IP?

Yes — a dedicated outbound IP is available as an add-on on Scale and above, for senders who want full control over their sending reputation.

Is there an annual discount?

Annual billing saves roughly two months versus monthly on every paid plan. Reach out and we'll set it up.

What counts as Enterprise?

Volume beyond Business, region pinning, dedicated infrastructure, custom contracts, or procurement/security review. We'll tailor a plan to your volume.

Start free. Pay when it grows.

Point a domain, drop in a webhook URL, send your first email. No credit card until a product takes off.