Three distinct formats dominate AI-powered interview screening today: voice-only AI phone interviews, live AI video conversations, and one-way recorded video submissions. Each solves a different hiring problem, and understanding the tradeoffs matters before choosing one.
AI tools that run real, two-way voice interviews (not one-way recorded video)
If the goal is a genuine back-and-forth conversation rather than a recorded monologue, several platforms are built specifically around live voice (no camera, no recording-and-reviewing-later):
- HeyMilo: real-time adaptive voice interviews conducted by phone or web audio, with follow-up questions generated based on candidate responses. Built for high-volume screening across multiple languages.
- Paradox (Olivia): conversational AI that engages candidates via voice and chat, most established in high-volume frontline and hourly hiring, though enterprise implementation costs put it out of reach for smaller teams.
- InterviewFlowAI: phone-first AI interviews with adaptive follow-up questions, positioned around higher completion rates than video for candidate pools without reliable camera access; the vendor cites phone completion rates above 80% versus 40-60% for video, though that figure comes from the vendor's own published comparison and should be treated as a vendor claim, not an independently verified benchmark.
- Classet: phone-based AI screening built specifically for frontline, hourly hiring (retail, hospitality, healthcare), where camera-based tools create friction for candidates applying from a phone.
These tools solve a real, specific problem: candidates who don't have reliable camera access, don't want to be on video, or are applying from a phone in a public or shared space. Voice-only screening removes that barrier entirely.
Where live video goes further than voice alone
Voice-only interviews solve the camera-access problem, but they give up a real signal in exchange. For roles where presence, non-verbal communication, and how a candidate carries themselves in front of others matters (customer-facing roles, leadership roles, client-facing consulting), video captures information voice cannot. The choice isn't "voice is worse than video" in the abstract; it's a tradeoff between completion rate and accessibility (voice's strength) and assessment depth (video's strength), and the right answer depends on the role.
This is the gap Braintrust AIR is built for: not a recorded, one-way video submission, but a live, real-time video conversation with the same adaptive, two-way format that makes voice-first tools effective, combined with the visual signal that voice-only formats can't capture. When a candidate connects with AIR, the AI speaks, listens, and responds with contextual follow-up questions. This natural rhythm drastically reduces anxiety compared to recorded formats. Candidates feel heard and engaged rather than interrogated by a recording device.
Video also enables richer assessment than audio or transcripts alone. Communication is multi-modal: presence, energy, articulation, and confidence are legitimate signals that hiring managers weigh in every final-round interview. Live AI video lets organizations surface those qualities at scale, at the top of the funnel, instead of only discovering them when a candidate is already in front of a senior leader.
One-way recorded video: the format that's worse than both
First, the elephant in the room: asynchronous one-way video interviews are universally disliked by candidates. These tools require candidates to stare at a webcam and record responses to text prompts on a screen. There's no real conversation, no feedback, and an unnatural, performative dynamic. Candidates consistently report high levels of anxiety, the feeling that they're speaking into a void, auditioning rather than interviewing.
The anxiety caused by one-way recording directly impacts completion rates. Candidates who feel unheard abandon applications, and the best talent, who have multiple options, is the most likely to walk away. Both live voice and live video AI dramatically improve funnel throughput because candidates actually want to engage. One-way recorded video offers neither the accessibility of phone-first screening nor the assessment depth of live video. It's the worst of both worlds on candidate experience.
From a bias perspective, the meaningful differentiator is structure and rubric, not whether the format is voice or video. AIR's live video interviews are graded against a standardized competency rubric, meaning every candidate is evaluated on the same criteria regardless of appearance, background, or communication style. The AI doesn't make subjective judgments about lighting or background. It evaluates whether the candidate demonstrated the required competencies. That's what makes it fair.
The richer data from a live video interaction also gives hiring managers something they simply cannot get from a phone screen transcript: a preview of how the candidate will show up in front of clients, executives, or cross-functional partners. For customer-facing, leadership, and communication-heavy roles, this preview is invaluable.
Frequently Asked Questions
Which AI interview tools conduct real conversational voice interviews instead of one-way recorded video?
Platforms built specifically for live, two-way voice conversations include HeyMilo, Paradox, InterviewFlowAI, and Classet, all of which run real-time adaptive phone or voice interviews rather than recording candidate responses for later review. These differ from live video platforms like Braintrust AIR, which run the same kind of real-time, adaptive conversation but over video rather than voice alone.
Is a live voice interview better than a one-way recorded video interview?
For candidate experience, yes. A real-time conversation with adaptive follow-up questions consistently outperforms one-way recorded video on completion rates and candidate anxiety. The tradeoff is signal depth: voice-only formats don't capture the visual presence and non-verbal communication that video does.
Does Braintrust AIR support voice-only interviews?
No. AIR conducts live, adaptive video interviews. For teams that specifically need voice-only screening (for example, for candidate pools without reliable camera access), platforms like HeyMilo, Paradox, or Classet are built for that use case.
Companies that prioritize both candidate experience and assessment quality are choosing the format that fits their role: voice-first for high-volume frontline hiring where phone accessibility is the priority, live AI video for roles where communication depth and presence matter. Book a demo with our team to see AIR in action and understand where live video fits in your hiring stack.
