Pricing

No send bundles. No allowance to waste.

There is no bundle to outgrow and no included volume to lose at the end of the month. Your bill is exactly what you sent plus the mailboxes you keep: accepted transactional sends at $0.0006, accepted marketing sends at $0.0009, and each live mailbox at its plan's rate. The Console prints all of them, per message, as they happen.

Transactional email

$0.60per 1,000 sends

$0.0006 each

Receipts, password resets, alerts - anything one person asked for. The same rate whether it leaves through the API or the SMTP relay, billed from the same wallet. Available on the Enterprise mailbox plan.

Marketing email

$0.90per 1,000 sends

$0.0009 each

Campaigns to a contact list you verified. Priced separately because it carries different deliverability risk, not because it uses a different sender. Available on the Enterprise mailbox plan.

Starter mailbox

$4.99per mailbox / month

$49.90/year prepaid

A real mailbox on your own domain with 25 GB of storage, IMAP and JMAP access, and the web mail client. Mail your team sends to each other and to customers is covered by the mailbox and never billed as a send.

Enterprise mailbox

$12.99per mailbox / month

$129.90/year prepaid

Everything above with 100 GB a mailbox, and it unlocks the sending platform on the account: the transactional API, the SMTP relay, the marketing stream, templates, contact lists and event webhooks.

These rates are what SendKnot intends to charge at launch. Billing is not live yet, so nothing here has been charged to anyone - and if a rate changes before launch, this page changes with it.

Two mailbox plans

The plan decides what a mailbox costs, how big it is, and whether this account can send from an application. It is not a send bundle - sends are still metered one at a time at the rates above.

Starter and Enterprise mailbox plans compared
	Starter mailbox$4.99 per mailbox / month	Enterprise mailbox$12.99 per mailbox / month
Mailboxes on your own domainIMAP, JMAP, the SendKnot Mail client, and any desktop or phone mail app.	Unlimited, billed per mailbox	Unlimited, billed per mailbox
Storage per mailboxSet by the plan. There is no size to choose and no way to get it wrong.	25 GB	100 GB
Domain setup, DKIM, SPF and DMARCThe records are generated for you and checked continuously, on both plans.	Included	Included
Inbound mail, filtering and quarantine	Included	Included
Bounce and complaint reporting, suppressionsNever behind a plan. A customer who cannot see their own bounces cannot tell that their mail is not arriving.	Included	Included
Fair use, per mailbox per dayGoing over holds messages for review. It is never billed as overage.	500 messages	2,000 messages
Transactional email API and SMTP relayMetered per accepted message from your wallet at the printed rate.	Not included	Included
Marketing emailIts own stream and IP pool. Every recipient must be on a contact list you had verified.	Not included	Included
Templates, contact lists, API keys, webhooksThe machinery the sending API is addressed through.	Not included	Included
Dedicated IP with managed warm-up	Not included	Included

Moving between plans

Upgrading takes effect the moment you ask for it: you pay only the difference for the days left in the current period, and everything the higher plan includes is available straight away. Moving down takes effect at the END of the period you have already paid for - nothing is charged, nothing is deleted, and no mailbox is ever shrunk below the mail stored in it. If a mailbox is too full for the smaller plan we postpone the change and tell you, rather than reducing it.

You top up a wallet

Add credit when you want it, or set an automatic top-up - "add $25 when the balance drops below $10" - which is off unless you turn it on. The Console shows the balance, what it buys at your current rate, and how long it lasts at your current pace.

$10$25$50$100or any amount from $5.00

Sending millions?

Dedicated IPs, a managed warm-up schedule and a rate that reflects the volume. Tell us what you send and how fast you want to get there.

Talk to us

Questions the rate card raises

What counts as a send?: One accepted message to one recipient. A message to three recipients is three sends. Messages we refuse are not billed, and neither is anything a suppression rule stops before it leaves.
Do you charge for mail between my own mailboxes?: No. Mail your team sends to each other, and ordinary correspondence from a mailbox, is covered by the mailbox's monthly price. Sends are what the API and the relay put on the public internet on your behalf.
Which plan do I need?: If you want business email for a team - mailboxes on your own domain, read in Outlook, Apple Mail or ours - Starter is the whole product and nothing is missing from it. Enterprise is for sending from an application: the transactional API, the SMTP relay and the marketing stream, with templates, contact lists, keys and webhooks. You choose when you create your first mailbox and you can move up at any time.
What happens to my mailboxes if I move down a plan?: Nothing, until the period you have already paid for ends - and then only the size changes. No mail is deleted and no mailbox is ever reduced below what is stored in it: if one is too full for the smaller plan we postpone the change and write to you instead of shrinking it. Upgrading is the other way round and takes effect immediately, charging only the difference for the days left.
Do I choose how big a mailbox is?: No, and that is deliberate. The size comes from the plan - 25 GB on Starter, 100 GB on Enterprise - so the number you were quoted and the number your mailbox actually gets are the same number. There is no size dropdown anywhere in the product.
Is there a free trial?: There is no trial and no free tier. Sending stays off until billing is set and a domain is verified, so the first thing you spend is the smallest top-up - $5.
Do you track opens and clicks?: No. SendKnot does not do open or click tracking, so nothing here is priced on engagement. You get delivery, bounce and complaint data from the mail servers themselves, which is what tells you whether mail is arriving.
What happens if my balance runs out?: Sending stops and the Console says so before it does. Mailboxes keep receiving; a seat that goes unpaid is locked before anything is deleted, and the timeline is shown in the panel rather than assumed.

Start with the smallest top-up.

Create an account, verify a domain, add credit, send one message and read what the receiving server said about it. That is the whole evaluation, and it costs less than a coffee.

Get started