The full research stack, without the friction
Qlarr is an open-source research platform that handles survey design, multi-mode data collection, and data quality validation — in one place your team controls.
From brief to clean dataset
Qlarr covers the full research lifecycle — design, collection, and data quality — in one place.
Design your survey
Build your questionnaire in the no-code editor or brief Qlarr AI with your research objective. Add routing logic, validation rules, and question types. Preview on any device before publishing.
Collect your data
Distribute via web link, panel, or the Qlarr field app. Responses are captured online, offline, or in hybrid environments. All collection modes feed a single, unified dataset.
Analyse and export
Review incoming data in real time. Apply quality filters, flag anomalous responses, and export clean datasets in the format your analysis workflow requires.
Build exactly the survey you need
Qlarr gives researchers and teams full control over questionnaire logic — without needing a developer or a survey programmer.
No-code logic editor
Build branching, skip logic, piping, and quota controls visually. Handles the complexity usually reserved for specialist tools.
Rich question types
Single choice, multi-select, matrix, ranking, sliders, open-text, file upload, and more — covering every standard survey methodology.
Qlarr AI
Brief the AI with your research objective and it generates a structured, logic-ready questionnaire in seconds. Edit as needed.
Collect wherever your respondents are
One survey, multiple collection environments. No rebuilding workflows. No switching platforms.
Offline-first capture
Collect responses with zero connectivity. Data is stored locally on the device and syncs automatically when a connection is restored.
Cross-device fieldwork
Deploy the same survey across Android tablets, field devices, and web — consistent experience, consistent data.
Multi-mode distribution
Distribute via web link, embed, panel integration, or field interviewer app. All modes feed a single dataset.
Clean data starts at collection
Validation logic and verification signals catch problems at the point of entry — so you spend less time fixing data and more time using it.
Response validation
Range checks, pattern matching, required fields, and custom validation rules prevent bad data from entering your dataset.
GPS & location capture
Capture interviewer or respondent GPS coordinates at the question level. Verify fieldwork location and detect anomalies.
Background audio recording
Optionally record ambient audio during interviews as a verification signal. Flag responses for quality review.
Your data, your rules
Qlarr is fully open-source. Deploy it where you want, how you want — and use our cloud if you prefer someone else manages the ops.
Fully open source
MIT-licensed. Inspect every line of code, fork the repository, extend the platform, or contribute back to the project.
GDPR-compliant by design
Data residency controls, consent management, and right-to-erasure workflows built in. Cloud hosted in the EU.
Self-host in 5 minutes
Deploy on your own infrastructure with a single command. Full documentation available, no DevOps expertise required.
What's included
A complete look at what Qlarr covers across survey design, data collection, quality validation, and infrastructure.
Survey Design
- No-code logic editor
- Branching & skip logic
- Piping (carry-forward text)
- Quota management
- Rich question types (15+)
- Multi-language surveys
- AI survey generation
- Question library / templates
Data Collection
- Web link distribution
- Panel integration
- Offline data capture
- Field interviewer app
- Hybrid online/offline
- Embeddable surveys
- Anonymous & authenticated responses
- Response quotas & caps
Data Quality
- Question-level validation rules
- GPS location capture
- Timestamp logging
- Background audio recording
- Duplicate response detection
- Speeder & flat-liner flags
- Response quality review dashboard
- Anomaly alerts
Infrastructure & Security
- Fully open-source (MIT)
- Self-hosted deployment
- GDPR-compliant cloud (EU)
- Role-based access control
- Data residency controls
- API access
- Audit logs
- SSO (Enterprise)
See it for yourself
Start with the free plan or deploy the open-source version on your own infrastructure. No commitment required.