QardQntac

What QardQntac is

QardQntac is a free, open-source business-card scanner that you host on your own server. It extracts contact details from card photos with AI: scan or upload an image, review and correct the fields, add color-coded tags, then export or sync the contact. Extraction can use locally hosted Ollama models or cloud providers OpenAI, Anthropic, and Google Gemini. The project says data stays on the self-hosted server unless a cloud AI provider is selected; its Ollama option runs locally without internet access. Contacts can sync with standard CardDAV servers, including Nextcloud, Radicale, and Baikal, or be downloaded as .vcf files. Duplicate detection checks names, email addresses, and phone numbers. Sign-in uses passwordless email links when SMTP is configured; otherwise, the links appear in server logs. Administrators can restrict sign-ins by email domain or disable registration. The interface supports English and French. Deployment instructions cover Docker Compose and containers on a Linux server with Docker and Node.js. Phone and tablet camera scanning requires HTTPS with a valid certificate. PostgreSQL can be configured; the embedded database fallback is not suitable for production.