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ADP vs GMass: 2026 Comparison

ADP GMass
Overview One of the world's largest payroll and HR solutions providers offering services for businesses from small to enterprise. GMass is a mass email and cold outreach tool that works directly inside Gmail. It turns Gmail into a powerful email marketing and outreach platform with mail merge, automatic follow-ups, and campaign analytics.
Pricing Subscription (Custom pricing) Freemium ($0-55/mo)
Key Features
  • Payroll processing
  • Tax filing
  • Benefits administration
  • Time tracking
  • Talent management
  • HR outsourcing
  • Compliance
  • Analytics
  • Gmail-based sending
  • mail merge
  • automatic follow-ups
  • email tracking
  • campaign reports
  • scheduling
  • Google Sheets integration
Pros
  • Industry leader
  • Scalable for any size
  • Comprehensive features
  • Strong compliance
  • Works inside Gmail
  • Very easy to use
  • Affordable
  • Great Google Sheets integration
Cons
  • Complex interface
  • Expensive
  • Customer support varies
  • Outdated UX in some areas
  • Gmail sending limits apply
  • Limited advanced features
  • No multi-channel support