Private surveys.
Verified answers.
Surveys where every response is private. No accounts needed — just share a link and let people answer without worrying about their privacy.
No account required. Free during beta.
How would you rate public transit in your area?
Simple for everyone involved.
Create a survey
Add up to 5 questions, set optional location eligibility, and publish. Share the link with your audience — that's it.
Respond privately
Open the link, confirm your device with biometrics, and answer freely. Your identity is never recorded — your response is verified without revealing who you are.
Get verified results
Every response is cryptographically verified and permanently recorded. You see real results from real people — no one can link a response to a person, not even us.
Not just another survey tool.
Traditional survey tools promise anonymity but can't prove it. umbra.vote uses advanced cryptography to make privacy a mathematical guarantee — not a policy.
Mathematically private
Your responses are anonymous and cryptographically verified. Survey creators see aggregate results only — individual identities are mathematically impossible to recover. Not difficult. Impossible.
Location-verified eligibility
Target surveys to specific countries or nearby locations. Respondents prove they qualify without sharing their exact coordinates — just that they're in the right place.
One device, one response
Device-bound biometric identity ensures each person can only respond once. No duplicate responses, no bots — without requiring sign-ups, email verification, or downloads.
Verified, not trusted
Every response is proven legitimate by cryptographic verification. You don't have to trust us, or anyone — the math guarantees it. Results are permanently recorded and auditable by anyone.
Mathematically private
Responses are anonymous and cryptographically verified. Individual identities are mathematically impossible to recover. Not difficult. Impossible.
Location-verified eligibility
Target surveys to specific countries or nearby locations. Respondents prove they qualify without sharing exact coordinates.
One device, one response
Device-bound biometric identity ensures each person can only respond once. No sign-ups, no downloads required.
Verified, not trusted
Every response is proven legitimate by cryptographic verification. The math guarantees it. Results are permanent and auditable.
What's next
umbra.vote is live today with anonymous, location-verified surveys. Here's what we're building next.
Age range verification
Prove respondents are in a specific age range — like 18 to 25 — without anyone sharing their birthday.
Organization membership
Prove you belong to a company, university, or group without revealing who you are within it.
Richer credential filters
More ways to verify eligibility — professional credentials, certifications, and membership proofs.
Enterprise features
Larger surveys, team management, analytics dashboards, and API access for organizations at scale.
Ready to ask better questions?
Create your first anonymous survey in under a minute. Every response verified, every identity protected.
No account required. Free during beta.
Need private, verified surveys for your organization?
We're working with businesses, educators, and research teams who need survey infrastructure they can actually trust.
Get in Touch