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Reply.io

Reply.io is a sales engagement platform used by 3,000+ B2B teams to automate prospecting and multichannel outreach (email, LinkedIn, WhatsApp, SMS, calls), including Jason, its AI SDR that researches, personalizes, and follows up autonomously. Reply.io exposes a REST API and an MCP server so external tools and AI agents can search contacts, launch and manage sequences, triage replies, book meetings, and pull performance data — all through one API key.

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