MailStrike vs Warmerly

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.

Warmerly automates email warmup and checks deliverability for connected mailboxes. Its warmup feature sends threaded conversations with quoted replies and natural delays, and can recover warmup messages that end up in spam. InboxPulse checks SPF, DKIM, DMARC, MX and TLS daily. Google Workspace and Microsoft 365 connect through OAuth; other providers can connect over IMAP and SMTP, including Zoho and Namecheap Private Email. The service also lists LinkedIn warmup and outreach, plus WhatsApp messaging; LinkedIn costs $50/month per account separately. Plans include a free option with 100 campaign emails per month, and paid plans from $19/mo with a 7-day trial. Paid plans state that email sending is unlimited and unmetered. Warmerly runs on Android and the web, and offers an API. The operator says mailbox credentials and OAuth refresh tokens are encrypted at rest with AES-256-GCM, requests use TLS 1.2 or higher, and hosting and backups are in the European Union. The site names agencies, sales teams, telecom companies, lead-generation businesses, founders, SDRs and recruiters as users.