stampwing

Email for your websites and apps

One plan. All your projects.

Monthly plans USD, before tax

Free

$0/month

3,000outbound recipients / month
Start free
  • 100 recipients / day
  • 5 sending domains
  • 100 incoming messages
  • 30-day event history

Builder

$10/month

10,000outbound recipients / month
Choose Builder
  • No daily cap
  • 50 sending domains
  • 1,000 incoming messages
  • 90-day event history

Growth

$20/month

50,000outbound recipients / month
Choose Growth
  • No daily cap
  • 100 sending domains
  • 1,000 incoming messages
  • 90-day event history

Scale

$30/month

100,000outbound recipients / month
Choose Scale
  • No daily cap
  • 100 sending domains
  • 1,000 incoming messages
  • 90-day event history

Business

$500/month

1,000,000outbound recipients / month
Choose Business
  • No daily cap
  • 500 sending domains
  • 1,000 incoming messages
  • 90-day event history

Automatic account approval. Free’s daily allowance resets at midnight UTC.

Every plan includes
Compare all plan details
Monthly allowances and retention, shared across your workspace
IncludedFreeBuilderGrowthScaleBusiness
Monthly price, USD before tax$0$10$20$30$500
Outbound recipients / month3,00010,00050,000100,0001,000,000
Outbound recipients / day (UTC)100No daily capNo daily capNo daily capNo daily cap
Incoming messages / month1001,0001,0001,0001,000
Sending domains550100100500
Event history30 days90 days90 days90 days90 days
Message content kept7 days30 days30 days30 days30 days
Retained content storage100 MiB2 GiB2 GiB2 GiB2 GiB
Optional overagesNot availableWith a spending capWith a spending capWith a spending capWith a spending cap

Simulated content activity has a separate 100 MiB limit per rolling 24 hours.

You choose the spending limit.

Overages are off by default. Paid plans can enable them from $1 per 1,000 extra recipients or incoming messages, with a cap you set. We stop new activity before it exceeds your cap.

How billing works
Example monthly bill50,000 outbound recipients
Builder plan
$10
Extra usage, after price caps
$10
Monthly total before tax
$20

With a $10 extra spending cap and no incoming usage.

Price caps don’t change your domain, storage or retention limits.

Questions

What counts toward my allowance?

Each outbound recipient counts once. An email to three recipients uses three units. Each incoming message counts once per destination project. Sending and receiving have separate allowances; retries and duplicate notifications don’t count twice.

What happens when I reach my limit?

Free includes 100 outbound recipients per day and 3,000 per month. The daily allowance is shared across your workspace and resets at midnight UTC. Paid plans have no daily cap; they stop at their monthly allowances unless you enable overages and set an additional spending cap. Pending activity counts toward your cap. Failed requests released before submission aren’t billed. Messages already submitted can’t be recalled.

How do automatic price caps work?

We apply a cheaper applicable tier price when it lowers your extra charges. Your total can’t fall below your selected plan’s monthly fee. The discount doesn’t change your subscription or unlock another plan’s domain, storage or retention limits.

Can I use several projects and domains?

Yes. Your allowance is shared across projects in one workspace. Each sending domain uses a domain slot; its included receiving subdomain doesn’t use another. Separate workspaces have separate plans.

Can I send live emails right away?

Your account is approved as soon as you sign up. Verify your sending domain and connect your app to send live email. Plan allowances, API and sending rate limits, and automatic abuse checks apply. Inbox placement is never guaranteed.