MailMark – Cold email tool where you own your domain and mailboxes
Gmail for your own domains, with built-in warming, tracking, and multi-stage follow-ups.

Yet another cold email tool competing with Instantly and Lemlist.
Sales teams, founders doing outbound, cold email marketers
Instantly · Lemlist · Woodpecker
Gmail for your own domains, with built-in warming, tracking, and multi-stage follow-ups.
Yet another cold email tool competing with Lemlist and Instantly with no clear differentiator.
CLI designed for AI agents with JSON output is clever positioning for automation.
Connect your own SMTP, import a CSV, create templates and bulk-send small batches while keeping a record of who you've messaged — that's the explicit promise and it's refreshingly focused. The UI in the signup screenshot is tidy and usable, but the space is crowded: without built-in deliverability tools, analytics, or scheduling this mostly replaces scripts and spreadsheets rather than upending outreach tooling.
SMTP verification beats format checks, but Kickbox and ZeroBounce already own email validation SaaS.
Just a static CSV file sold for $199 when scrapers exist for free.