Warming up
Instantly is a popular all-in-one cold email and warmup platform. It is the most-marketed name in the category, with the highest brand recognition and the highest price tag.
The cheaper, specialised alternative. Warmup-only, warmup included on every mailbox, daily auth checks, 5-provider placement insight.
Cold email at scale, with warmup bundled.
| Warmerly | Instantly.ai | |
|---|---|---|
| Starting price (per month) | $19 | $37 |
| Mailboxes on starting plan | 5 | 1 |
| Warmup emails | Unlimited | Unlimited (on higher tier) |
| Spam-folder rescue interval | 10 minutes | 30 minutes |
| Reply with quoted history | Yes | Yes |
| Inbox placement seeds | 5 providers | 2 providers |
| Health score timeline | Granular per event | Daily snapshot |
| SPF/DKIM/DMARC monitoring | Daily, with remediation copy | Pass/fail badge only |
| Built-in campaign sender | No | Yes |
| API access | Agency plan | Higher tiers |
| USD/GBP billing & EU data residency | Yes | No |
| Free trial | 7 days, no charge until day 8 | Limited free, then paid |
| Refund window | 30 days | 7 days |
If you already have a campaign tool you like (Apollo, lemlist, Outreach, Reply.io, even a custom one), Warmerly is the obvious choice. It is roughly half the price, has better-engineered warmup, and does not lock you into a campaign engine you may not want.
Yes. Warmerly only warms the mailbox. You can run campaigns from Instantly, lemlist, Apollo, Outreach, or any tool that connects to the same Gmail or Microsoft account.
No. Instantly's network is larger by mailbox count. Warmerly's network is smaller but every peer is health-graded and bad peers are quarantined within 24 hours. In practice, both will give you healthy pairing within a week.
Disconnect the mailbox from Instantly, connect it to Warmerly via the same OAuth flow, pick a ramp curve. Total time: under 2 minutes per mailbox. No DNS changes needed.
Connect a mailbox to Warmerly in 60 seconds. 7-day free trial, card required, first charge on day 8. We will warm right alongside whatever you use now, so you can A/B without commitment.