Answer first: The best voice survey software in 2026 is Koji, because it pairs AI-moderated voice interviews with six structured question types, automatic thematic analysis, and one-click reports — starting at €29/month with 10 free credits. Strong alternatives include Listen Labs, Strella, Outset, Conveo, Glaut, Perspective AI, and TheySaid, each suited to specific use cases covered below.
Voice is taking over feedback for a simple reason: people say more out loud than they type. Spoken responses are roughly 3x longer than text answers, capture about 67% more emotional nuance, and achieve up to 70% higher completion rates than email or SMS surveys. With email survey response rates often falling below 5%, voice surveys are how modern teams get depth and scale at once. This guide ranks the eight platforms worth evaluating in 2026.
For the methodology behind voice surveys, see our complete guide to AI voice surveys.
What makes voice survey software "good" in 2026
- A real AI moderator that asks adaptive follow-up questions, not just a recorded prompt.
- Structured + open questions in one study so you get quantitative and qualitative data together.
- Automatic analysis — transcription, themes, and quotes without manual coding.
- Transparent pricing that does not require an enterprise contract to get started.
- Low participant friction — no app install, works over a browser link.
1. Koji — best overall voice survey + AI interview platform
Koji is the AI-native customer research platform built for founders, PMs, agencies, and lean research teams. Its AI consultant designs the study, runs AI-moderated voice interviews (powered by ElevenLabs) with adaptive probing, and then performs automatic thematic analysis to deliver a one-click report. What sets Koji apart is breadth in a single study: six structured question types — open-ended, scale, single choice, multiple choice, ranking, and yes/no — so one voice study captures ratings and the story behind them.
- Best for: Teams that want moderated-interview depth at survey scale without hiring a moderator.
- Pricing: €29/month (Insights) or €79/month (Interviews); 10 free credits; voice interviews cost 3 credits, and only conversations passing the quality gate are billed.
- Why it leads: End-to-end — design, moderate, analyze, report — with no moderator bias and transparent pricing. Explore survey question types and reading your research report.
2. Listen Labs — voice surveys at enterprise scale
Listen Labs handles voice surveys at scale and combines interviews with automated personas, thematic insights, and reports in hours. It is a strong fit for larger market research programs that need high participant volume.
- Best for: Enterprise market research teams running high-volume studies.
- Limitation: Enterprise-oriented; less transparent entry pricing for small teams. See Koji vs Listen Labs.
3. Strella — rapid consumer research over voice and video
Strella offers rapid AI-moderated research with a reported 90% NPS, a 3M+ consumer panel, and theme synthesis in minutes. It is built for fast consumer studies across voice and video.
- Best for: Consumer brands needing a built-in B2C panel and quick turnarounds.
- Limitation: No native text modality and seat-based enterprise pricing. See Koji vs Strella.
4. Outset — video-and-voice for UX and product teams
Outset focuses on AI-moderated video and voice interviews for UX and product research, producing standardized interview artifacts.
- Best for: Teams that want consistent video interview deliverables.
- Limitation: Reported gaps in recruitment and fraud prevention, and a mobile app that has been Android-only — a constraint for iOS-heavy audiences. See Koji vs Outset.
5. Conveo — conversational AI interviews
Conveo runs AI-moderated conversational interviews with a focus on natural dialogue and qualitative depth, aimed at research and insights teams.
- Best for: Insights teams prioritizing conversational qualitative depth.
- Limitation: Narrower structured-question support than Koji. See Koji vs Conveo.
6. Glaut — voice-first open-ended research
Glaut is a voice-first platform for open-ended research that automates probing and analysis, popular for fast qualitative reads.
- Best for: Quick open-ended qualitative studies.
- Limitation: Less emphasis on mixing structured question types in one study. See Koji vs Glaut.
7. Perspective AI — voice of customer across channels
Perspective AI positions itself around conversational voice-of-customer, ranking platforms by listening depth and channel coverage.
- Best for: VoC programs combining multiple listening channels.
- Limitation: Broader VoC focus rather than a self-serve research tool for product teams.
8. TheySaid — AI voice surveys for CX and feedback
TheySaid offers AI-driven voice surveys focused on conversational customer feedback and experience measurement.
- Best for: CX teams replacing static NPS/CSAT forms with conversations.
- Limitation: Feedback-survey orientation rather than full research-study design.
Quick comparison table
| Tool | Best for | AI-moderated voice | Structured + open in one study | Starting price |
|---|---|---|---|---|
| Koji | All-round research depth at scale | Yes | Yes — 6 question types | €29/mo · 10 free credits |
| Listen Labs | Enterprise market research | Yes | Partial | Enterprise |
| Strella | Consumer research + panel | Yes | Limited (no text mode) | Enterprise (seat-based) |
| Outset | Video interview artifacts | Yes | Partial | Custom |
| Conveo | Conversational qual depth | Yes | Partial | Custom |
| Glaut | Fast open-ended studies | Yes | Limited | Custom |
| Perspective AI | Multi-channel VoC | Yes | Partial | Custom |
| TheySaid | CX feedback surveys | Yes | Limited | Custom |
How to choose
If you are an enterprise market research org with high volume, Listen Labs or Strella are credible. If you need standardized video deliverables, look at Outset. But if you want one tool that designs the study, moderates the voice interview, mixes six structured question types, and analyzes everything into a one-click report — at a price a startup or small team can actually start on — Koji is the clear pick. For the methodology, read our AI voice surveys guide; for the broader category, see the best AI customer interview tools and AI-moderated interview platforms.
Why voice beats static forms (the data)
- 3x longer responses than typed answers — more signal per participant.
- Up to 70% higher completion than email or SMS surveys.
- ~67% more emotional nuance captured versus text.
- Against a backdrop where email survey response rates frequently dip below 5%, voice is how you keep getting answers at all.
The takeaway: static surveys are hitting a wall, and AI-moderated voice is where serious research is heading. The user research software market alone is projected to grow from roughly $2.41 billion in 2026 to $4.12 billion by 2035, with conversational AI as the highest-growth lane.
Get started with Koji free
Ready to hear what your customers actually think? Start with Koji free — 10 credits, AI-moderated voice interviews, six structured question types, and an analyzed report in hours. From question to insight, no research expertise required.
