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    All tool comparisons
    Tool comparison · Head to head

    GMass vs Reply.io

    A factual comparison of features, pricing, and capabilities.

    Updated 2/6/2026
    The contenders
    01
    Tool A

    GMass

    Gmail-based mass email and mail merge platform with unlimited emails, campaigns, and contacts directly inside Gmail.

    Starting at$30/month
    02
    Tool B

    Reply.io

    AI-powered sales engagement platform with 1B+ B2B contacts, multichannel sequences, and AI SDR capabilities.

    Starting at$49/month
    Line by line

    Pricing comparison.

    Monthly rates shown. Annual billing may offer discounts. Visit official sites for current pricing.

    Capabilities

    Feature comparison.

    FeatureGMassReply.io
    Works inside Gmail
    Unlimited emails, contacts, and campaigns
    Mail merge personalization
    Free email verification
    Automated follow-up sequences
    A/B testing
    Spam Solver deliverability tool
    Custom tracking links
    Inbox rotation
    API and Zapier access
    Unlimited email warmup
    1 billion B2B contacts database
    Anti-spam & deliverability suite
    LinkedIn automation (add-on)
    SMS and calls (add-on)
    AI personalization
    AI SDR capabilities
    Multi-workspace for agencies
    14-day free trial
    Available
    Partial/Limited
    Not Available
    Ecosystem

    Native integrations.

    GMass

    GmailGoogle SheetsZapierGoogle Workspace

    Reply.io

    HubSpotSalesforcePipedriveCopper CRMZendesk SellCloseZapierMaken8n
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    Information gathered from official sources and may change. Pricing and features last verified 2/6/2026. Please visit the official websites for the most current information.