Plans and pricing

Start free in the sandbox, then go live on Base for $89 a month with 1,000 emails included.

Overview

Transactional Email has one free mode and one paid plan today. Every HubSpot account starts in the Sandbox when you install the app. When you’re ready to send from your own domain, you subscribe to Base. An Enterprise plan is coming soon.

Subscriptions are monthly, one per HubSpot account. There are no annual plans.

What each plan includes

Plan	Price	Emails	What’s included
Sandbox	Free	20 sends total	Sends to any recipient from Cambium’s shared sandbox address. Only emails that go out count. One sandbox per HubSpot account; reinstalling doesn’t reset it.
Base	$89/month	1,000 per billing period	One sending domain, unlimited sender profiles, warm-up, suppression, the content review, App Home reporting, and auto-bought extra emails within a monthly budget you set.
Attachments add-on	$19/month	—	Coming soon.
Enterprise	—	—	Coming soon: higher volumes, attachments, dedicated IPs, multiple sending domains, and open and click tracking.

Every plan includes the same deliverability controls — warm-up, rate limits, auto-pause, suppression, and the content review. They’re always on and can’t be turned off.

Extra emails on Base

If you send more than your 1,000 included emails in a billing period, Transactional Email can add more for you automatically, 100 emails at a time (a top-up), within a monthly budget you set in Settings → Billing. The price of a top-up is shown there. Nothing is charged when a top-up is added: extra emails are billed on your next monthly invoice. Unused extra emails expire at the end of the billing period.

The budget starts at $0, which means auto-buy is off: once your included emails run out, sends fail with quota_exhausted until the next period. See How your email allowance works.

How to tell which plan you’re on

Open App Home (Marketplace apps → Transactional Email). The Billing section shows your plan — Sandbox or Base — and its status. Usage shows Sandbox sends while you’re in the sandbox, and Emails this period with your included emails, extra emails bought, and auto-buy budget once you’re on Base.

Tips

You can test everything in the sandbox before you pay — templates, sender profiles, workflows, and branching on results.
Live sending needs a verified sending domain and the accepted Acceptable Use Policy as well as a subscription. See Going live.
Billing runs through Stripe. Invoices, your payment method, and cancellation are under Manage billing in Settings.