More advanced layout customization and database integrations, but lacks client-side end-to-end data encryption features.
BlockSurvey records 302,480 monthly visits with -14.9% month-over-month growth and Freemium, Paid pricing. Nevermined records 0 monthly visits with 0% growth and Freemium pricing.

Payments infrastructure that lets AI agents buy services autonomously within limits you set
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | blocksurvey.io | nevermined.io |
| Pricing Model | Freemium, Paid | Freemium |
| Monthly Visits | 302.48K (302,480) | 0 (0) |
| MoM Traffic Delta | -52.92K (-14.9%) | 0 (0%) |
| Primary Market & Share | 🇺🇸 United States (25.1%) | 🌐 Global (—) |
| Direct Visits / mo | 259.19K | 0 |
| User Rating | 4.2 | 4.4 |
| 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.

Payments infrastructure that lets AI agents buy services autonomously within limits you set
Set an amount, a purchase count and an expiry before an agent can pay. Every transaction is checked against the mandate, and only you can raise the limit.
A vetted catalog of paid AI services agents can buy per call, reachable through one integration rather than many separate vendor accounts.
Settles merchants over card, Visa agentic tokens or crypto rails, so agents pay inline without a checkout flow.
Stop an agent's ability to spend with one dashboard click or API call, with no grace period and no residual purchasing power.
More advanced layout customization and database integrations, but lacks client-side end-to-end data encryption features.
Broader template library and poll features, but lacks specialized privacy-first cryptographic encryption for sensitive survey responses.

Faster AI form and logic generation from text prompts, but without client-side end-to-end encryption.

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.

Identity, payments, and pay-per-use tools for AI agents

Supports unique MCP server integrations for AI form generation, but lacks BlockSurvey's strict cryptographic privacy focus.
Free / Open-sourceOpen-source codebase with unlimited submissions and AI assistance, but less emphasis on end-to-end encrypted data storage.

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

SpecialistAI-moderated voice and video interviews that scale survey research to thousands of people at once

Decision infrastructure for governed enterprise AI agents
Decision infrastructure for governed enterprise AI agents

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.

SpecialistAn ICANN-accredited domain registrar built for AI agents and onchain ownership.
SpecialistAn ICANN-accredited domain registrar built for AI agents and onchain ownership.