The best 2026 outbound stacks combine Lemlist for sending with AI agent workflow automation for everything before the first email ships.
Example stack
- Clay enriches leads with firmographics and LinkedIn data.
- AI agent in Zapier or n8n scores fit and drafts icebreakers.
- Lemlist runs the multichannel sequence with Lemwarm active.
- HubSpot logs replies and triggers nurture for non-responders.
Why automate the prep layer
Reps spend 60% of time on research, not selling. Agents handle enrichment and first-draft copy; humans edit high-value accounts.