Block Survey

BlockSurvey is a survey platform built around privacy. Responses are end to end encrypted, and the vendor states that only the survey owner can read them. Alongside a standard survey builder, it offers AI features for drafting surveys, running conversational interviews that adapt to each respondent, thematic analysis of open answers, anomaly detection and longitudinal comparison of repeated survey waves. The platform is aimed at researchers, organizations and teams that need honest responses and control over their data. The capabilities that matter most are AI survey creation, AI analysis, conversational surveys, question types with survey logic, and a survey MCP connection that lets Claude, Claude Code and ChatGPT create, edit and publish surveys from inside the assistant. Pricing is published in US dollars. The Free plan costs $0. Standard costs $49 per month or $39 per month billed yearly, Premium costs $99 or $79 per month, and Team costs $149 or $119 per month, and each paid plan can be tried for free. Enterprise pricing is available on request. Response packs, email campaigns, SMS credits, AI credits and a custom domain are also sold as one time purchases, with the custom domain priced at $99.