Atomic Mail Sender's pricing structure on G2 shows a free trial available for evaluation, with full functionality unlocked under a single paid tier at a one-time license fee of $89.95. The trial lets prospective buyers assess core capabilities before committing. Atomic Mail Sender's paid license removes recipient limits, enables multi-threaded high-speed sending, supports multiple SMTP server configurations simultaneously, includes list management across Excel, Access, DBF, and text formats, and provides email scheduling. G2 reviewers note the paid license is perpetual and hardware-locked, meaning no recurring subscription fees but activation tied to a specific machine. No feature-restricted free tier exists beyond the trial period.