Winnr is a cold email infrastructure platform. You buy or connect domains, Winnr creates authenticated mailboxes on them (SPF, DKIM, DMARC set up for you), warms them if you want, and you plug the credentials into any sending tool: Smartlead, Instantly, EmailBison, Salesforge, and many others. It replaces the slow setup of Google Workspace or Microsoft 365 with a few clicks, at a fraction of the cost.
Who Winnr is for
Winnr is built for teams that send cold email at volume:
- Sales teams running outbound across dozens or hundreds of mailboxes
- AI SDR builders provisioning infrastructure programmatically through the API or MCP server
- Demand-gen agencies managing sending for several clients
- Founders who want their own infrastructure without spending a week on DNS
If you only send a few dozen cold emails a day, one or two regular inboxes are usually enough. Winnr makes sense once you need many mailboxes across several domains.
What Winnr does for you
Four things that would otherwise take you days:
- Domain provisioning. Buy new domains through Winnr, or connect ones you already own. Authentication records (SPF, DKIM, DMARC) are set up automatically.
- Mailbox creation. Create up to 10 mailboxes per domain (5 is the recommendation) in seconds. Each mailbox gets its own SMTP/IMAP credentials.
- Warming. Built-in warming ramps mailboxes gradually so they don't get flagged when you start sending real campaigns.
- Export to your sending tool. Ready-made exports for the major sending platforms, direct sync for some, or a CSV.
Along the way you also get a universal inbox for reading replies across all mailboxes, DNS health monitoring, and Winnr Agent, an in-app assistant that answers questions and can make changes for you (see Winnr Agent).
You control the domains, the mailboxes, and the sending. Winnr is the plumbing.
What Winnr does not do
Winnr is deliberately not a sending tool. There's no campaign builder, no sequence editor, no lead database, and no email verification product. That's what tools like Smartlead, Instantly, and EmailBison are for. Winnr feeds them mailboxes.
The reason: infrastructure and campaign management are different problems, and mixing them locks you in on both sides. With Winnr you can switch sending tools any time. The mailboxes stay yours.
How the pieces fit together
Winnr (mailboxes on your domains, with SPF/DKIM/DMARC and warming)
│
└──▶ Export credentials to Smartlead / Instantly / EmailBison / etc.
│
└──▶ Your sending tool runs the actual campaign
A typical setup takes about 30 minutes: buy a handful of domains, create mailboxes on each, turn on warming, and export to your sending tool. Warming runs in the background for at least 2 weeks (4 on brand-new domains) while you finish your copy and targeting.
What's next
- No account yet? Create your account
- Already signed up? Set up your first domain
- Comparing plans? Choose your plan
Frequently asked questions
Do I need my own domains to use Winnr?
No. You can buy domains through Winnr in a few clicks (Winnr handles the registration and DNS), or connect domains you already own. Most customers do a mix.
What sending tools does Winnr work with?
Anything that accepts SMTP and IMAP credentials. Winnr has ready-made exports for Smartlead, Instantly, EmailBison, Salesforge, Snov, Reply.io, Woodpecker, Mailshake, SalesHandy, and others, plus a generic CSV for the rest.
How is Winnr different from Google Workspace or Microsoft 365?
Winnr runs its own email infrastructure, built for outbound. There's no per-seat cost creep, mailboxes are ready in minutes instead of days, and there's no risk of a workspace shutdown for "unusual activity." You send from managed shared IP pools, with the option of a [dedicated IP](/help/billing/dedicated-ips.html) on Enterprise.
How much does Winnr cost?
Startup is $69/month for 50 mailboxes; Enterprise is $189/month for 200 mailboxes. Extra mailboxes are $1 each per month. Domains are a one-time purchase of roughly $9 to $15 depending on the extension (a .com is about $13). Warming is $0.60 per mailbox per month if you turn it on. See [Choose your plan](/help/getting-started/choose-plan.html) for the full breakdown.
How many emails can I send?
Plan on 10 to 20 cold emails per mailbox per day, with 15 as the normal pace, and keep each mailbox at 50 or fewer total emails a day including warming. More volume comes from more mailboxes and domains, not from pushing each mailbox harder.