GMass

What GMass is

GMass sends newsletters, announcements, cold campaigns, and transactional email from inside Gmail through an extension and the web. It supports mail-merge personalization, conditional campaign logic, and Google Sheets rows as recipients with columns supplying merge fields. Campaign tools include analytics, scheduling, automatic follow-ups, A/B testing, and unsubscribe and bounce management. Integrations listed include a REST API, webhooks, Zapier, Google Sheets API, and SMTP relay. GMass says sending can use Gmail, inbox rotation, or SMTP as audience size grows. It stores recipient email addresses for campaign features but says it does not store campaign subject or message content; the address database uses two firewall layers. It may share list information with service providers, including advertising platforms, for targeted advertising. There is no free plan, though a free trial is available. Standard is $20 a year (billed $249 paid annually), Premium is $29 a year (billed $349 paid annually), and Professional is $49 a year (billed $599 paid annually).