InboxWarm.ai vs Warmerly

InboxWarm.ai automatically warms Gmail, Outlook, and SMTP inboxes to build sender reputation, improve inbox placement, and reduce spam placement. It sends, opens, and replies to warmup messages using contextual replies generated by large language models and human-like sending patterns. InboxWarm describes its seed network as private and made up of real inboxes. Its spam recovery feature marks warmup messages as not spam and moves them to the primary inbox when they land in spam. Supported setups include Gmail, Outlook, SendGrid, Amazon SES, Mailgun, Yahoo, and custom SMTP/IMAP. Plans include SPF, DKIM, and DMARC domain-health monitoring and real-time inbox-placement tracking. Every plan includes a public REST API with 30 endpoints; the default rate limit is 20 requests per minute per API key. Monthly prices range from $15 a month for one mailbox to $5 a month for 51–100 mailboxes, with up to 100 warmup emails per inbox per day on those listed tiers. A 10-day trial covers one email account without a credit card.

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.