Self-serve sequencers
Fine on quiet B2B lists if you already know deliverability. On merchant cash advance they typically hold for a few weeks, then the domains are spent. You still have to write, warm, watch, and build the apply path yourself.
A desk, not a login
When a tool is enough — and when it is not.
If you mail opted-in, low-complaint audiences and you like running the machine, use a tool. If you mail cold MCA names at volume, the machine is the whole problem.
Newsletter ESPs
Built for people who asked to hear from you. Unsolicited MCA mail on a shared IP is the exact use they ban. That is not a bug in the ESP. It is the product they sold to everyone else on the pool.
A calling floor
Works. It also needs seats, scripts, and a manager. Mail reaches more merchants per day if — and only if — it stays in the inbox. That is the job we take.
Ready to send
Bring the list. We handle the sending.
Inbox placement is seed-tested to major providers. If it drops below 90% after you are at full speed, those days are credited. How the promise works