About SendWaves
We know what breaks when
cold email scales
SendWaves handles the infrastructure underneath every campaign —
provisioning, authentication, mailbox health, and rotation —
before deliverability problems cost you replies.
Built by the team
Built by the team behind Mailshake
For more than a decade, we've worked inside outbound at scale.
We saw the same failures repeat: damaged domain reputation, unhealthy mailboxes, and issues discovered only after reply rates dropped.
SendWaves is the infrastructure we built to prevent them.
10+ years
in outbound
100,000+
companies using Mailshake
1,000,000,000+
cold emails sent
How we build
Infrastructure first
We obsess over domains, DNS, mailbox health, and reputation. That's the layer that decides whether your copy ever gets read.
Built by practitioners
Everything in SendWaves comes from running outbound ourselves. If a feature exists, we needed it first.
Simple by design
We build tools that do one job well and stay out of your way. No bloated dashboards, no busywork.
Support from people
who've run outbound
Deliverability problems are urgent and specific. Our support team has run outbound campaigns themselves. They don't read from a script.
See what 1 billion sends of experience can do
for your deliverability