GMass is a Gmail-native mass email and mail merge platform that breaks Gmail sending limits, enables personalization at scale, and provides advanced deliverability optimization through Google Sheets integration.

GMass turns Gmail into a powerful email marketing and cold email platform. It allows users to break Gmail's sending limits using proprietary distribution technology, perform mail merge with Google Sheets data, create automated follow-up sequences, manage replies efficiently, and gain detailed campaign analytics. The platform includes features like email verification, A/B testing, SMTP integration, and triggered emails.
Easiest way to send an email campaign
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AI Sales Copilot for B2B sales teams
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AI-powered SaaS platform providing end-to-end sales intelligence, prospecting, and engagement automation using three specialized AI agents (Signal, Research, Sequence). Combines 200M+ verified contacts with 100+ buying intent signals for hyper-personalized multichannel outreach.
B2B go-to-market AI sales platform
Founded
Apollo.io is a B2B go-to-market platform helping revenue teams find prospects, enrich records, automate outreach, and move deals forward. Combines 275M+ verified B2B contacts with 65+ advanced filters and AI-assisted execution.
AI Sales Platform for Smarter, Faster Revenue Growth
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Apollo.io is an all-in-one AI sales platform combining B2B data, outreach automation, and deal execution. It unifies prospecting, lead generation, data enrichment, and sales execution across outbound, inbound, and deal management.