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. Labelbox records 762,803 monthly visits with -22.8% growth and Contact for Pricing pricing.
Privacy-first AI surveys with end-to-end encrypted responses
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | blocksurvey.io | labelbox.com |
| Pricing Model | Freemium, Paid | Contact for Pricing |
| Monthly Visits | 302.48K (302,480) | 762.8K (762,803) |
| MoM Traffic Delta |
| -52.92K (-14.9%) |
| -225.17K (-22.8%) |
| Primary Market & Share | 🇺🇸 United States (25.1%) | 🇺🇸 United States (21.9%) |
|---|
| Direct Visits / mo | 259.19K | 370.02K |
|---|
| 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.

The environments frontier AI trains on, and the agents that do the recurring work
Structured annotation, curation, model evaluation and human-in-the-loop review across vision, language and generative tasks, used to build the training and eval data behind production models.
Recursion agents start on their own from builds, alerts, commits, checkpoints and schedules, then work in the background until the task is finished and reviewable.
Specialist agents cover software engineering, reliability, security, ML research, evals, R&D, product and finance workflows, from flaky test fixes to postmortem drafts and vulnerability patches.
Every agent run is scored by a grader, and graded sessions leave memories, notes and skills that the next session reads before acting, so quality compounds over time.
More advanced layout customization and database integrations, but lacks client-side end-to-end data encryption features.
SpecialistStreamlines end-to-end computer vision workflows from annotation to model deployment, but lacks Labelbox's general enterprise agent orchestration.

Broader template library and poll features, but lacks specialized privacy-first cryptographic encryption for sensitive survey responses.

SpecialistRelies heavily on managed human-in-the-loop workforce services for data validation, offering less self-serve technical tooling than Labelbox.
Delivers enterprise-grade labeling and model evaluation at massive scale, but often requires higher enterprise budgets than Labelbox.

Offers robust multimodal annotation and workflow automation, featuring slightly more intuitive data curation pipelines for computer vision teams.

SpecialistTrack, evaluate, and ship AI models and agents in one connected environment.

Specializes in advanced computer vision and physical AI data pipelines, though with a narrower focus than general text-and-image labeling.

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

Free / Open-sourceProvides a flexible open-source alternative for custom data labeling, but requires self-hosting and manual infrastructure maintenance.


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.
SpecialistStreamlines end-to-end computer vision workflows from annotation to model deployment, but lacks Labelbox's general enterprise agent orchestration.
Delivers enterprise-grade labeling and model evaluation at massive scale, but often requires higher enterprise budgets than Labelbox.
Offers robust multimodal annotation and workflow automation, featuring slightly more intuitive data curation pipelines for computer vision teams.
SpecialistTrack, evaluate, and ship AI models and agents in one connected environment.
Specializes in advanced computer vision and physical AI data pipelines, though with a narrower focus than general text-and-image labeling.
Free / Open-sourceProvides a flexible open-source alternative for custom data labeling, but requires self-hosting and manual infrastructure maintenance.
Better interactive quizzes and lead capture polls, but less focused on secure research surveys and data privacy.