Build powerful forms, surveys and quizzes with AI in minutes
BlockSurvey records 302,480 monthly visits with -14.9% month-over-month growth and Freemium, Paid pricing. Voiceform records 54,210 monthly visits with +5.6% growth and Contact for Pricing pricing.

AI-moderated voice and video interviews that scale survey research to thousands of people at once
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | blocksurvey.io | voiceform.com |
| Pricing Model | Freemium, Paid | Contact for Pricing |
| Monthly Visits | 302.48K (302,480) | 54.21K (54,210) |
| MoM Traffic Delta | -52.92K (-14.9%) | +2.88K (+5.6%) |
| Primary Market & Share | 🇺🇸 United States (25.1%) | 🇺🇸 United States (81.5%) |
| Direct Visits / mo | 259.19K | 31.17K |
| User Rating | 4.2 | 4.2 |
| Supported Platforms | Website | Website |
Privacy-first AI surveys with end-to-end encrypted responses
Responses are encrypted on the respondent's device before upload, so only the survey owner holds the key and can decrypt the data.
Generate structured, less biased questionnaires from a prompt, refine wording, create answer options and add skip logic and multilingual support.
Automated thematic analysis, sentiment detection, anomaly flagging and data encoding turn open-ended answers into usable categorical insight.
Run natural back-and-forth interviews with dynamic follow-up questions that adapt to each respondent for deeper qualitative data.

AI-moderated voice and video interviews that scale survey research to thousands of people at once
An AI moderator generates dynamic follow-up questions when an answer is thin, adding interview depth without a human moderator per session.
Respondents can answer by speaking, recording video, or typing, and teams can embed the same questions into existing survey platforms.
Every response is transcribed, translated, and themed with sentiment scoring and charts ready to drop into a report.
Built-in AI translation and transcription let one study reach audiences across more than fifty languages.
Build powerful forms, surveys and quizzes with AI in minutes

AI-moderated customer interviews that turn conversations into decisions
AI-moderated customer interviews that turn conversations into decisions
Build forms, surveys and quizzes in seconds — with unlimited free responses
Qualitative research depth at survey scale, moderated by AI
Qualitative research depth at survey scale, moderated by AI

Get face to face with interactive video, at scale
Get face to face with interactive video, at scale


Better interactive quizzes and lead capture polls, but less focused on secure research surveys and data privacy.
Better interactive quizzes and lead capture polls, but less focused on secure research surveys and data privacy.

Supports unique MCP server integrations for AI form generation, but lacks BlockSurvey's strict cryptographic privacy focus.
Free / Open-sourceOpen-source form builder with AI assistance and unlimited responses

SpecialistTurn static forms into adaptive AI conversations with structured output
SpecialistTurn static forms into adaptive AI conversations with structured output

Stronger automated analysis of open-ended response data, but fewer privacy-focused enterprise encryption guarantees.
Stronger automated analysis of open-ended response data, but fewer privacy-focused enterprise encryption guarantees.

Conversational AI forms that ask and answer questions