OutPumperThe comparison
OutPumper, side by side.
No spin and no asterisks. Here is what you get and what you pay, against the tools most people consider.
At a glance
Where OutPumper pulls ahead.
| What you care about | OutPumper | Instantly | Smartlead | Woodpecker |
|---|---|---|---|---|
| Monthly cost | From 49 a month, or 497 once | 30 to 97 a month | 39 to 159 a month | 49 to 99 a month |
| Sends from | Your own Microsoft 365 Outlook | Your mailboxes, via their cloud | Your mailboxes, via their cloud | Your mailboxes, via their app |
| Warmup needed | No, send day one | 2 to 3 weeks | 2 to 3 weeks | 2 to 3 weeks |
| Your data stays private | Yes, never leaves your tenant | Stored on their platform | Stored on their platform | Stored on their platform |
| Domains to buy and warm | None to a few | 30 to 50 typical | 30 to 50 typical | Several |
| Mailboxes to manage | A couple of real M365 mailboxes | Hundreds, bought and rotated | Hundreds, bought and rotated | Several you supply |
| Works inside Outlook | Native add-in | Separate web app | Separate web app | Separate web app |
| Smart throttling | Built in, automatic | Manual | Basic | Basic |
| Email variation | Full rewrite engine | Basic spin | Basic spin | No |
| Shared mailbox rotation | Automatic, free | No | No | No |
| Automatic safety stop | Built-in kill switch | No | No | No |
| One-time purchase option | 497 forever | No | No | No |
| Connect external providers | SendGrid, Mailgun, SES, any SMTP | No | No | Limited |
| Built-in email verification | Free, unlimited | Third party required | Third party required | Third party required |
| Learns from bounces | Auto-blacklists everywhere | No | No | Manual cleanup |
The real cost
Cheaper than the stack it replaces.
vs Instantly
Instantly has you buy and warm dozens of throwaway domains and spin up mailbox after mailbox, the warmup footprint inbox providers increasingly flag, all run from a separate app. OutPumper sends through a couple of real Microsoft 365 Outlook mailboxes on day one, with no domain farm and nothing to warm up.
vs Smartlead
Smartlead runs the same playbook: dozens of domains, stacks of mailboxes, weeks of warmup, with your contacts and campaigns living on its platform. OutPumper keeps the sending, the data, and the reputation inside your own Microsoft 365 tenant.
vs Woodpecker
Woodpecker is solid, but it still needs external SMTP, DNS setup, and warmed-up domains. OutPumper removes that entire layer. No SMTP wiring, no domain farm, just your own Outlook and Microsoft 365.
Where your data lives
Yours, or theirs.
Keep your domain. Keep your data. Keep your reputation.
Your Outlook already does the hard part. Try OutPumper free for seven days.