Join Leading Brands across 50+ countries
Using BlockSurvey to protect their respondents' privacy, increase their survey completion rates, get better community feedback, and build better organizations.
BlockSurvey is built for collecting sensitive women's health data, menstrual health, reproductive health, mental health, and beyond. End-to-end encrypted, zero-knowledge, and HIPAA & GDPR compliant platform. No one, including us, can read your respondents' answers.
Trusted by leading brands for secure, privacy-first surveys
















70% of women say they would share more accurate health information if they were confident their data was private. (Source: McKinsey, 2023). Women's health data — menstrual cycles, reproductive choices, mental health, sexual health — is among the most sensitive data that exists. BlockSurvey's end-to-end encryption and zero-knowledge architecture means this data is protected by design, not just by policy.
Disclosure rates for sexual abuse rose by 30% in the same population, purely based on how anonymous respondents believed the survey was. Most platforms claim anonymity but still retain the ability to de-anonymise respondents at the admin level. BlockSurvey's zero-knowledge architecture makes that technically impossible. Not even your team can identify who submitted what.
3x higher response rates on sensitive health topics when surveys guarantee anonymity versus those that don't. One question at a time. No walls of clinical text. BlockSurvey's conversational AI survey format is proven to improve completion rates on sensitive health topics — reducing the clinical feel that makes women disengage or abandon surveys halfway through.



Collect menstrual cycle data, symptom tracking responses, and period health questionnaires at scale. Women are more likely to share accurate cycle data when they trust the platform is private. BlockSurvey's zero-knowledge guarantee removes the barrier — respondents know their data isn't being shared with advertisers or insurers.
Run sensitive surveys on contraception, fertility, pregnancy loss, and reproductive choices — topics where privacy isn't a preference, it's a requirement. Zero-knowledge encryption ensures responses cannot be accessed by third parties, insurers, or even your own team without authorisation.
Collect validated mental health instruments — PHQ-9, GAD-7, Edinburgh Postnatal Depression Scale — in a conversational format that reduces clinical anxiety. Anonymity is guaranteed at the architecture level, so women disclose more honestly on depression, anxiety, and trauma-related questions.
Femtech companies building period trackers, fertility apps, and women's wellness platforms use BlockSurvey to collect user research without compromising the trust their brand is built on. Surveys are end-to-end encrypted — your users' health data never becomes a data asset you didn't consent to create.
NGOs, public health bodies, and healthcare providers running women's health programmes — maternal health, cervical screening, breast cancer awareness — use BlockSurvey to measure programme impact. Sensitive self-reported data is collected anonymously and encrypted throughout.
Collect anonymous feedback on menstrual health policies, menopause support, maternity experience, and workplace wellbeing from women employees. Anonymity guaranteed at the architecture level — so women report honestly without fear that HR can identify their response.
Start free. Upgrade when your research outgrows it. Every plan keeps end-to-end encryption and full data ownership.
$49$39/mo
Unlimited surveys with AI-powered creation, end-to-end encryption, and core privacy protections.
$99$79/mo
Everything in Standard, plus AI follow-up questions, custom branding, audience management, and custom survey links.
$149$119/mofor 3 users
Everything in Premium, plus AI data analysis, market research question types, campaigns, and compliance essentials.
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For organizations that need scale, security, SSO, white-label control, and personalized onboarding.
Join 500+ happy customers worldwide who are already using our amazing product.
This platform goes far beyond basic surveys. I’ve used it for lead generation, landing page enrichment, and even embedded videos. Everything’s easy to use, well documented, and super flexible—whether you're building forms, quizzes, or something more advanced.
Martin G.Créateur de la Méthode RashōmonI think BlockSurvey is good for short and long surveys. What I find the best is the fact that there are so many templates I can use and customize.
Ankit M.AI Analyst Team LeadUses end-to-end encryption technology that allows users to create survey forms where data is secure and private. UI looks very beautiful.
Lou F.Creative VisionaryFrom end-to-end encryption-level security and AI-generated questions to powerful logic flows and white-label domains, BlockSurvey has it all. It’s secure, innovative, and packed with features like calculations, templates, and in-app analytics. I use it to create personalized assessments for leadership training—nothing else compares.
Kim B.Founder/ President - International Leadership TrainerBlockSurvey puts privacy and security above anything else. The use of end-to-end encryption is not a gimmick as in many products; it's a core feature enabling privacy and security. The survey building tools are impeccable. I've used numerous SaaS survey tools, and nothing comes close.
Trevor L.Chief Information Security Officer (CISO)BlockSurvey is very user-friendly with amazing customization options. It makes capturing data simple and secure. While the Web3 space still has room to mature, the platform itself is smooth and intuitive.
Ali S.Founder, Small- BusinessFew tools combine data confidentiality and form aesthetics like this one. The conversational design improved my response rate by 43%, and the webhook integrations made syncing to our CRM effortless. I also love how responsive and community-driven the support team is.
Kris R.Group Automation ManagerCreating surveys with BlockSurvey has been a breeze. The drag-and-drop interface is intuitive, and we’re able to collect data anonymously and securely—without intermediaries. It’s interactive, friendly, and encourages high participation while protecting user privacy. The reports are solid, and we’ve used it confidently for internal and external feedback.
Liz D.IT Support SpecialistFor our NGO, data privacy is everything—and this platform nails it. It keeps personal info fully protected while letting us design beautiful, chat-like surveys that increase engagement. Team collaboration features sealed the deal.
Luis Noel D.Director ComercialUsing BlockSurvey to protect their respondents' privacy, increase their survey completion rates, get better community feedback, and build better organizations.
Security isn't an afterthought for us; it's a cornerstone. BlockSurvey meets and exceeds industry-leading standards, including ISO 27001, SOC2, FERPA, HIPAA and GDPR, to keep your data safe.



Yes. BlockSurvey uses end-to-end encryption and a zero-knowledge architecture — meaning responses are encrypted on the respondent's device and cannot be accessed by BlockSurvey or any third party. It is HIPAA compliant with BAA included and GDPR compliant with DPA available.
Join 500+ companies across 50+ countries who use BlockSurvey to collect sensitive health data with the privacy guarantees women deserve.