The self-hosted alternative to Mailshake.
Run your own cold-email sequences, on your own server, with your own connected inboxes. No SaaS reading your outbound mail, no per-seat pricing.
Why self-host
No vendor lock-in
Your campaigns, contacts, and sending accounts live in your own database. Cancel any time and you keep everything.
Your data stays yours
Subsimail's only network call to us, ever, is a license check — your license key and a random install ID. We never see your emails, contacts, or campaigns.
Predictable costs
Flat per-inbox pricing, not per-seat. Scale your team without your bill scaling with it.
No external uptime dependency
Your sending doesn't stop because a SaaS provider is down. It's your server, your uptime.
Everything a cold-email tool needs
Multi-step sequences
Threaded follow-ups that land as one conversation, not disconnected emails.
Connect your own inboxes
Gmail, Outlook, or plain SMTP/IMAP — BYOC, no shared sending infrastructure.
Open & click tracking
Per-contact event history, dashboard drill-down, no black-box analytics.
Reply detection
Sequences stop automatically the moment a contact replies.
Contact lists & custom fields
CSV import, segment by list, merge-tag anything you track.
Sending limits & safety
Daily caps and randomized send intervals per account, built in.
Deploy in 3 steps
Get a license
Free for your first 2 connected inboxes.
Deploy
docker pull + docker compose up on your own server.
Connect & send
Connect an inbox, write your sequence, go.
Pricing
One plan. No hosted tier, no per-seat pricing.
First 2 connected email accounts free — forever
Every account from the 3rd onward:
$9/account/mo
Billed monthly
$7/account/mo
Billed annually Save 22%
- Unlimited team members, always — you only pay per connected inbox, never per seat
- Prebuilt roles (Super Admin, Admin, Manager, View Only) included on every plan
- Webhook delivery for API integrations Coming soon
FAQ
What does self-hosted mean for my data?
SubsiMail runs entirely on your own server. The only thing that ever leaves it is a periodic license check — your license key and a random install ID. We never see your emails, contacts, or campaigns.
What server do I need?
Anything that can run Docker. A small VPS is enough for most teams.
How is this different from Mailshake?
Mailshake is a hosted SaaS with per-seat pricing that reads and stores your outbound email. SubsiMail is software you run yourself — same core workflow, none of the lock-in.