MailStrike vs Swokei Email Warmup

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.

Swokei Email Warmup is a web-based outreach service for web design agencies and freelancers. It examines prospects’ websites in a headless browser, captures screenshots, and assesses design, copy, performance, and conversion paths. It can use those findings to write personalized outreach emails and send them from the user’s mailbox. Leads can be imported from spreadsheets, pasted rows, Google Sheets, a website URL, or a saved library. Positive replies can become deals in the built-in CRM, which supports pipeline stages, tasks, notes, files, and deal values. Mailbox warmup is included on every plan, with an automatic 30-day ramp and per-mailbox health and bounce-risk indicators. Swokei supports Gmail, Outlook, Yahoo, custom domains, and SMTP connections; for Gmail, it says it monitors only messages it sent. The Free plan costs nothing and starts with 20 credits, but has no mailboxes and does not allow sending. Paid plans start at $42/mo billed annually. The listed daily email limit is 50, and the warmup network is shared.