Sigma Cards
NFC Smart Business Card Platform
Reimagining the physical business card as a connected, always-updated digital asset — with one tap to share, and a structured 24-week roadmap for commercial scale.
The Problem with Physical Business Cards
Printed business cards have three fundamental problems. First, they become outdated the moment a phone number, email, or job title changes. Second, they require reprinting — at cost, with delay — every time information changes. Third, they can't be tracked: there's no way to know if a card was received, opened, or shared. Sigma Cards was built to solve all three problems simultaneously.
How Sigma Cards Works
Each Sigma Card contains an embedded NFC chip. When tapped against any modern smartphone (iOS or Android, no app required), the chip transmits a URL that opens the card holder's complete digital profile in the recipient's browser. The profile includes contact details, links, portfolio, social profiles — and can be updated instantly through the Sigma Cards dashboard at any time, with no need to reprint or redistribute any physical card.
Three-Phase Development Roadmap
Core MVP
NFC chip provisioning, digital profile creation and editing, tap-to-share flow. The minimum functionality needed to prove the concept with early adopters and begin generating genuine user feedback.
- NFC chip encoding and provisioning
- Digital profile builder (contact, bio, links)
- Tap-to-open browser experience (no app required)
- Basic profile analytics (tap count)
Growth Features
Profile customization, detailed analytics, and the account management infrastructure needed to support paying customers at commercial scale.
- Custom profile themes and branding
- Detailed tap analytics (location, time, device)
- Multiple card management per account
- QR code backup for non-NFC devices
- Stripe billing integration
Enterprise
Team and enterprise functionality — bulk provisioning, brand customization for company-wide rollouts, and CRM integrations.
- Bulk card provisioning for teams
- Company-branded profile templates
- Admin dashboard for team management
- CRM integrations (HubSpot, Salesforce)
- API access for enterprise customers
Tech Stack
Note on product status: Sigma Cards is currently in active development. The platform is accessible at sigmacards.in. Phase 1 functionality is implemented. This case study reflects the full planned product, with transparency about which phases are complete vs. in progress.