PartialSales / CRM ops
AI-only vs. human vs. hybrid cold email (12,000 sends)
Tools: LLM copy generation, Saleshandy
Setup, access, approval gate, failure notes
- Setup / prompt
- Three cohorts: AI-written (5k), human-written (2k), AI-drafted + human-edited (5k).
- Access required
- Sending domains and prospect lists
- HITL checkpoint
- Hybrid cohort: a human edits every AI draft
- Outcome & failure notes
- AI-only got 0.7% meetings and a 7.8% spam-flag rate versus 3.2% meetings and 3.1% spam for hybrid. Fully automated copy hurt deliverability and reply quality. Vendor-run test.
- Evidence type
- Vendor experiment
Source: Saleshandy blog · 2026 · Checked 2026-10-19