Winnr gives you SMTP and IMAP mailboxes on your own domains, running on sending infrastructure built for outbound instead of Google Workspace or Microsoft 365. Authentication is set up for you, and every mailbox plugs into the sequencer you already use.
Your sequencer (Instantly, Smartlead, EmailBison and the rest) does not send email by itself. It logs in to mailboxes and sends through them. Each mailbox needs two sets of credentials: SMTP to send, and IMAP to read replies so the sequencer can stop a sequence when someone answers.
Most teams start with Google Workspace or Microsoft 365 seats for this. Those are office suites priced per user and governed by policies written for a company's everyday email. An SMTP provider for cold email gives you the same two things, an SMTP login and an IMAP login, on infrastructure where outbound is the intended use and mailboxes are priced for volume.
On Winnr, every mailbox gets SMTP on port 465 and IMAP on port 993, both over SSL/TLS, with the full email address as the username. You never type these by hand: the export file for your sequencer carries the right host, port and password for each mailbox.
Winnr is the infrastructure layer. Your sequencer runs the campaigns.
Buy domains in the app as a one-time purchase (a .com is about $13), or connect domains you already own at no extra cost. Create up to 10 mailboxes per domain in seconds; around 5 per domain is the recommendation.
On domains Winnr sets up, it publishes SPF ending in -all, a DKIM key, and a DMARC policy of p=reject with a reporting address. DNS health is monitored, and you can add custom records or override DMARC.
21 tool-specific export formats plus a generic CSV, so the import file matches what your sequencer expects. EmailBison can also sync directly with no file.
Turn on email warming for any mailbox at $0.60/month, with a 0 to 100 health score and inbox-rate charts. Or skip the wait with pre-warmed domains.
The universal mailbox pulls replies from every mailbox into one view, so nobody has to log in to 200 accounts to find a prospect's answer.
A full REST API for domains, mailboxes, warming, inbox and exports, plus a hosted MCP server for Claude, ChatGPT and Cursor, and Claude Code skills.
Anything that accepts SMTP and IMAP credentials works. These have a dedicated export format and a setup guide.
Instantly, Smartlead, EmailBison, PlusVibe, ReachInbox, Salesforge, Snov.io, Reply.io, SalesHandy, Woodpecker, Mailshake, SmartReach, ManyReach, MasterInbox, LeadEngine, MailLead, AiCloser, SendKit, PipeLime, Warmy and WarmySender, plus a generic CSV for any other tool.
Because Winnr is not a sending tool, you can switch sequencers whenever you like. The mailboxes stay where they are; you export them again in the new tool's format.
Plan prices divided out, at the recommended 50 emails per mailbox per day.
| Option | Monthly price | Mailboxes | Per mailbox | Emails/month | Per 1,000 emails |
|---|---|---|---|---|---|
| Startup plan | $69 | 50 | $1.38 | 75,000 | $0.92 |
| Enterprise plan | $189 | 200 | $0.95 | 300,000 | $0.63 |
| Extra mailbox (either plan) | $1 | 1 | $1.00 | 1,500 | $0.67 |
| Enterprise + 800 extra (1,000 mailboxes) | $989 | 1,000 | $0.99 | 1,500,000 | $0.66 |
Emails/month assumes 50 emails per mailbox per day over 30 days. Domains are extra: a one-time purchase (a .com is about $13), or free to connect if you already own them. Warming is optional at $0.60 per mailbox per month. For comparison, Google Workspace Business Starter lists at $7 per user per month on an annual plan ($8.40 flexible) as of October 2026, and each sending mailbox is a user. See the full Google Workspace comparison.
| Winnr SMTP mailboxes | Google Workspace seats | |
|---|---|---|
| Pricing model | Plan includes 50 or 200 mailboxes; $1 per extra mailbox | Per user: Business Starter $7/month annual or $8.40 flexible (as of October 2026) |
| Cold email under the terms | The intended use. Winnr's terms prohibit illegal and certain categories of content, and anything that breaks laws like CAN-SPAM or GDPR | Google's Acceptable Use Policy prohibits using the services for "unsolicited mass email" |
| DNS and authentication | Set automatically, DMARC p=reject by default | You configure SPF, DKIM and DMARC per domain |
| Seat cap | Add mailboxes beyond your plan at $1 each | Business Starter, Standard and Plus max out at 300 users per account |
| Office suite (Docs, Drive, Meet, Calendar) | No | Yes |
| Hosted by | Winnr's own sending infrastructure |
Google facts are from workspace.google.com/pricing and the Google Cloud Acceptable Use Policy, checked October 6, 2026. Microsoft 365 has its own constraints for cold email; see Microsoft 365 for cold email in 2026. For deliverability data and a deeper look at both, read SMTP vs Google/Microsoft for cold email.
Winnr controls the infrastructure: authentication, DNS health, warming and the reputation of the sending IPs. You control the list, the copy and the volume. The recommended pace is about 50 emails per mailbox per day after warmup, and more volume should come from more mailboxes and domains rather than from pushing each mailbox harder. Before relying on a set of mailboxes for Gmail or Microsoft prospects, run a seed placement test to the providers your prospects use.
By default your mailboxes send from shared IP pools that Winnr runs and monitors. A well-run shared pool often beats an under-used dedicated IP. If you send high, steady volume and want a reputation no other sender can touch, the Enterprise plan offers dedicated IPs at $20 per IP per month, set up on request.
Buy domains in the app or connect ones you own, either by pointing nameservers at Winnr or by adding the records yourself. SPF, DKIM and DMARC are generated for you.
Create mailboxes in bulk, turn on warming, and give new domains two to four weeks before real volume. Pre-warmed domains skip this step.
Pick your tool in Export and import the file, or sync EmailBison directly. Replies land in your sequencer and in the universal mailbox.
No annual contract. Cancel anytime.
For teams getting started with outbound.
Everything in Startup, at four times the scale.
Extra email accounts are $1/month each on either plan. Warming is $0.60/mailbox/month. Full pricing.
Plans from $69/month for 50 mailboxes. Billed monthly, cancel anytime.
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