MailStrike vs Warmbox
MailStrike
mailstrike.aiWarmbox
warmbox.aiSide by side
| Figure | MailStrike | Warmbox |
|---|---|---|
| Price from | $3.75/mo | $15/mo |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Plans published | 5 | 7 |
| Spec score · Email Warmup Software | 8.1 (#11) | 7.2 (#23) |
| Headquarters | Kraków, Poland | Tallinn, Estonia |
Plans
MailStrike
- Growth$45 a year
- Professional$92 a year
- Solo$216 a year
- CustomPriced on request
- Seed ListsPriced on request
Warmbox
- Solo (yearly billing)$15 a month
- Solo (monthly billing)$19 a month
- Start-up (yearly billing)$69 a month
- Start-up (monthly billing)$79 a month
- Growth (yearly billing)$139 a month
- Growth (monthly billing)$159 a month
- TeamPriced on request
In their own words
MailStrike
MailStrike is an email deliverability platform for mailbox warming, placement testing, and seed lists for B2C senders. AI personas create and reply to email threads using a company's description and industry. Its warming network exchanges threads among business mailboxes while excluding spammers, free-mail senders, and dodgy sites. On connection, the service checks SPF, DKIM, DMARC, and MX records and identifies missing values. Google Workspace and Microsoft 365 connect through OAuth; other providers use IMAP and SMTP with an app password. Warming reaches full volume by day 21 and then continues at a maintenance volume. Seed lists monitor placement and can interact with messages; setup requires one DNS TXT record for domain verification. A free deliverability test reports inbox, promotions, or spam placement and scores spam signals without requiring a card. MailStrike runs on the web and through an API. Paid plans start at $18/mo (annual); there is no free plan, but a free trial is available.