About Smartlead
Smartlead offers unlimited mailboxes, AI warmup and a unified master inbox to run and manage cold campaigns at scale. Its API and whitelabel make it popular with agencies productizing outbound.
Similar strengths to Instantly, with a strong API and whitelabel story for teams building outbound as a service.
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The honest list
What we love
＋Unlimited mailboxes and warmup
＋Unified master inbox
＋API and whitelabel
＋Subsequences
Watch out for
−Cold-email specific
−UI has a learning curve