Engineers who hate email
use VoltMail daily.
4,200 product, growth, and platform teams send their receipts, magic links, alerts, and recovery flows through us. The numbers below are aggregates across the fleet.
Customers
4,200+
Emails / day
74M
Net retention
128%
Inbox placement
99.6%
Trusted by engineering teams at
How they actually use it.
B2B SaaS · Logistics
KEELHAUL
Cut transactional email spend 82% in the first month. Migrated 240k recipient suppression list overnight without losing a single bounce signal.
Email spend
−82%
first 30 days
Send volume
4.2M
monthly
Migration
6 hrs
incl. DKIM rotation
Fintech · Payments
pinebrook.dev
Replaced three vendors with one. Idempotent send + replay-able webhooks paid back the migration before the second invoice landed.
Vendors retired
3 → 1
consolidation
Webhook replay
0 lost
in 8 months
Receipt latency
−62%
p95 send time
E-commerce · Apparel
◆ RUNWAY
Self-served from Pro to Pro Max the day they crossed 600k sends. No sales call, no renegotiation, no migration script.
Inbox placement
99.7%
across Gmail+Yahoo
Plan upgrades
2 self-serve
in 90 days
Unsub compliance
<200ms
one-click honoured
What teams say,
unedited.
“Cut our email spend 82% the month we migrated. The pricing page is literally the contract — no hidden overage math.”
Priya Ranganathan
Staff Eng · Keelhaul
“We went from Pro to Pro Max the day we hit 600k. No sales call, no renegotiation. Self-serve all the way up.”
Marcus Ortega
Founder · Peddlebee
“The dedicated IP on Pro Max warms itself. I didn't babysit a single day. Reputation graph climbed on schedule.”
Sofia Andrade
Deliverability · Meadowplay
“Cut our email spend 82% the month we migrated. The pricing page is literally the contract — no hidden overage math.”
Priya Ranganathan
Staff Eng · Keelhaul
“We went from Pro to Pro Max the day we hit 600k. No sales call, no renegotiation. Self-serve all the way up.”
Marcus Ortega
Founder · Peddlebee
“The dedicated IP on Pro Max warms itself. I didn't babysit a single day. Reputation graph climbed on schedule.”
Sofia Andrade
Deliverability · Meadowplay
“The webhook replay alone saved us six engineering hours after an outage. Worth every cent.”
Sam Chen
Backend Lead · Cargodrop
“Finally an email API that feels like a developer tool, not a marketing platform.”
Morgan Taylor
Founding Engineer · acme/labs
“DKIM setup took 80 seconds. I literally timed it.”
Riley Park
Platform Eng · Olivepress
“The webhook replay alone saved us six engineering hours after an outage. Worth every cent.”
Sam Chen
Backend Lead · Cargodrop
“Finally an email API that feels like a developer tool, not a marketing platform.”
Morgan Taylor
Founding Engineer · acme/labs
“DKIM setup took 80 seconds. I literally timed it.”
Riley Park
Platform Eng · Olivepress
“Type safety on webhook payloads is a blessing. No more "what fields does this event actually have?"”
Casey Nguyen
Senior Eng · Fieldkit
“Replaced three vendors with one bill. Finance still sends me thank-you GIFs.”
Elena Vasquez
CTO · Pinebrook
“Inbox placement at 99.7% across Gmail and Yahoo. Coming from a vendor that ghosted us at 91%.”
Jordan Kim
Growth · RUNWAY
“Type safety on webhook payloads is a blessing. No more "what fields does this event actually have?"”
Casey Nguyen
Senior Eng · Fieldkit
“Replaced three vendors with one bill. Finance still sends me thank-you GIFs.”
Elena Vasquez
CTO · Pinebrook
“Inbox placement at 99.7% across Gmail and Yahoo. Coming from a vendor that ghosted us at 91%.”
Jordan Kim
Growth · RUNWAY
Your case study is five lines of code away.
Every team here started on Free. Most upgraded the day they shipped. None had to talk to sales first.