Voice/video AI screening vs email & phone screening — the completion-rate gap

It reflects commonly cited industry benchmarks from BPO/KPO recruitment automation case studies published in 2025-26, describing the share of scheduled phone screens that recruiters actually complete once redial attempts, missed calls, and candidate unavailability are factored in. Individual company results vary by sourcing quality and follow-up process.

That figure is reported by AI video interview platforms as a typical completion rate once a candidate starts the interview, since they can complete it at a convenient time instead of a fixed live slot. The reported jump — from roughly 30-40% live show-up rates to 75%+ with AI pre-qualification — is consistent across multiple published BPO hiring case studies.

For high-volume, non-technical roles (BPO, delivery, retail, warehouse, telecalling) where speed and completion rate matter most, yes — async voice/video screening consistently outperforms email or phone on completion. For senior or highly specialised roles with small applicant pools, a recruiter-led conversation may still be preferable at later stages; AI screening works best as the first-round filter.

Candidates in mass-hiring roles are more likely to complete a screening interview conducted in their preferred regional language than in English, since comprehension friction drops and comfort rises. Platforms offering the candidate a choice of language before the interview starts report higher completion than English-only flows.