Broadcast without burning what you built.
Segments, templates, and a warm-up ramp that steps a new sending identity up gradually — because the fastest way to look like a spammer is to behave like one on day one.
Segments, templates, and a warm-up ramp
Segments, templates, warm-up ramps, preview sends, and live counters for broadcast email.
Templates with a block editor
Compose visually or write HTML and plain text directly. Attachments are supported, and every template keeps both bodies so recipients who block HTML still get something readable.
Preview sends
Send the real thing to yourself before it goes to thousands of people. Previews are recorded with source preview, so they never pollute your campaign counters.
- Cancel and duplicate · Stop a running campaign, or duplicate a finished one to start the next from a known-good state instead of from scratch.
Warm-up ramps
Step a new sending identity up over days — 5%, 10%, 20%, 40%, then the full list — pausing automatically between steps. Going from zero to a full list in one day looks exactly like a compromised account.
Go and check.
Live counters
Sent, failed, suppressed, and unsubscribed update as a campaign runs. If something is going wrong, you see it during the send rather than in a report afterwards.
- Every message a campaign produced, individually, with its own trace.
- Which day of the warm-up ramp a campaign is on, and why it paused.
- Suppressed and unsubscribed counts as they happen, not after.
- The exact template and segment a send used.
Segments, then a campaign
Build a segment from your contacts, attach a template, set the from name and address, and send. Segments are reusable, exportable, and can be built by adding contacts individually or in bulk.
Going from zero to a full list in one day looks exactly like a compromised account.
The rest of the platform
Sending
REST API, SMTP relay, scheduling, two streams.
Learn moreObservability
Every event, every payload, queryable.
Learn moreContacts
Import, segment, and clean your list.
Learn moreDomains
DKIM, SPF, DMARC, and reputation isolation.
Learn moreAgents
API, CLI, and MCP — evidence in every response.
Learn moreStart sending
Verify a domain, send your first message, and read the trace it leaves behind — in about ten minutes.
Start sending
Broadcast, on its own stream.
Campaigns keep their own suppression list, so a newsletter unsubscribe never stops a password reset.
Open core · never venture-backed · operated by Martin Business Consultants