Flinter is an AI-native cold email platform helping B2B startups and growth teams convert cold leads into warm prospects. Most cold email tools help you send more emails. Flinter helps you send the right one. Flinter's AI agent researches each prospect automatically — finding real signals like funding rounds, new hires, product launches, and press coverage — and writes a personalized email around that signal. Every outreach feels like it was written by someone who actually did their homework. The result: teams using Flinter see higher reply rates compared to generic outreach. Flinter handles the full outbound workflow — signal discovery, email generation, multi-step sequences, sender rotation, and a unified inbox for managing replies across all campaigns and mailboxes. It offers unlimited sender inboxes supporting both Microsoft 365, Outlook and Google Workspace.