Ballast

Ballast is a comprehensive cold email platform built to offer every feature on every plan, eliminating hidden costs and tier-based feature restrictions. Connect unlimited mailboxes from Google Workspace, Microsoft 365, or any SMTP host without paying extra for additional domains or team seats.

Deliverability is protected through second-by-second reputation management, human-like random delivery gaps, ESP matching, and automated circuit breakers that pause campaigns if bounce rates climb.

Key features include:

• Free unlimited warmup that builds mailbox reputation without consuming your monthly email quota
• A unified Unibox to manage and sort replies from all connected accounts
• Advanced sequencing with A-E variants, spintax, and variable support
• Full API and MCP integration allowing AI tools like Claude, ChatGPT, and Cursor to interact directly with the app

Priced strictly by the volume of emails sent starting at $19 a month, the platform ensures predictable scaling for agencies, founders, and sales teams.