Warmerly vs Instantly.ai
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, unlimited mailboxes, daily auth checks, 5-provider placement insight.
Cold email at scale, with warmup bundled.
The short version
- Warmerly is roughly half the price of equivalent Instantly tiers.
- Every Warmerly plan includes unlimited mailboxes. Instantly charges per slot beyond the base.
- Spam-folder rescue runs every 10 minutes on Warmerly, 30 minutes on Instantly.
- Instantly includes a campaign sender. Warmerly is warmup-only and integrates with whatever you already use.
Feature by feature
| Warmerly | Instantly.ai | |
|---|---|---|
| Starting price (per month) | $19 | $37 |
| Mailboxes on starting plan | Unlimited | 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 card | Limited free, then paid |
| Refund window | 30 days | 7 days |
Our verdict
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.
- You want the warmup half done well, without paying campaign-tool prices
- You already use a separate cold email tool you like
- You want USD or GBP billing from a UK-based provider with EU data residency
- You manage multiple mailboxes per domain (3+ on a starter budget)
- You need warmup and campaigns in a single dashboard with one login
- You specifically value Instantly's CRM integrations (Salesforce, HubSpot native)
- Budget is not a factor
Questions
Can I use Warmerly with Instantly's campaign engine?
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.
Is Warmerly's peer network as large as Instantly's?
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.
How do I migrate from Instantly to Warmerly?
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.
Tired of paying Instantly.ai prices?
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.