Research & opinion agency · Brussels
The opinion of your audiences,
raised to the rank of decision.
OpinionSurvey designs, deploys and analyzes your surveys with the rigor of a research firm and the power of artificial intelligence. From question to insight, with no concession on method.
Our expertise
A complete chain, from question to decision.
Surveys & polls
AI-assisted design, multi-channel deployment, structured collection and fine-grained statistical analysis.
Predictive analysis
In-depth reading of your data by our AI models, in natural language.
Compliance & GDPR
On-demand anonymization, full traceability, European hosting and strict data separation.
Field collection
Public links, QR codes, direct access: the audience responds anywhere, without friction.
The method
Four stages, constant rigor.
Scoping
Together we define the objectives, target and hypotheses of the study.
Design
The AI generates the optimal form; you validate each question and its format.
Collection
Distribution via public link and QR code. Real-time participation tracking.
Analysis
Detailed statistics and AI summary delivered to the client, in their dedicated space.
The agency
Quantum-Num, data science in service of opinion.
We are a hybrid agency: half the team comes from quantitative research and sociology, the other from data science. This dual culture ensures surveys that follow statistical best practices, read by AI that speaks the language of your decision-makers.
Each client has a private space — their portal — where their studies, statistics and AI analyses live in full confidentiality.
Connectivity & integrations
Your data, wherever you work.
OpinionSurvey connects your surveys to your favorite tools. Query your data in natural language from Claude, ChatGPT or Gemini, plug your systems via API, and publish your forms on your own site, in your colors.
AI Assistant (MCP)
Connect Claude, ChatGPT, Gemini or Cursor to your survey data. Ask your questions in natural language: the assistant reads, analyzes and answers instantly.
- Works with Claude, ChatGPT, Gemini and Cursor
- Secured by your account — the AI only sees your data
REST API key
Access your surveys, questions, responses and orders through a simple REST API. One private key, requests scoped to your data.
- Private key dedicated to your account
- Native integration in your tools and automations
Embed on your site
Display any form on your site, via iFrame or JavaScript, with your logo and colors. Frictionless distribution for your audiences.
- iFrame or JavaScript code, ready to paste
- Custom branding and colors
Pricing
Choose your level of customer listening
From surveys to predictive analysis: turn your customers' feedback into decisions.
Essential
Launch your first surveys
- Up to 3 active surveys
- 500 respondents / month
- Ready-to-use questionnaire templates
- Real-time dashboards
- CSV & PDF export
- Email support
Growth
Customer listening at scale
- Unlimited surveys
- 5,000 respondents / month
- Branching logic & advanced targeting
- AI analysis & automated summaries
- API & webhook integrations
- Priority support (chat & email)
Enterprise
Predictive analysis & custom
- The Growth offer, plus:
- Unlimited respondent volume
- Dedicated predictive models (Churn, Satisfaction)
- Advanced security & GDPR compliance
- SSO & multi-team management
- Dedicated account manager
- 99.9% SLA & personalised onboarding
All plans include European hosting, GDPR compliance and included updates.
OpinionSurveyGive your audience a clear voice.
Access your client space, or discover how our administrators orchestrate each study.
Become a client