Five products live · one sibling brand · one GPT in the ChatGPT store

Practical software,
battle-tested by us first.

We build tools for small teams and service businesses, then run our own company on them. The CRM we sell is the CRM we use. What ships to you, we have already lived with.

One account connects every product · unified login · built in Benton Harbor, MI
5
Products in active sales
1
Connected platform & login
1
Sibling brand (Feathers AI)
1
Custom GPT in the ChatGPT store
What we ship

Six surfaces. One platform you actually own.

Each product solves a real problem we hit ourselves. They share one login and connect to each other — but each one stands on its own.

GDK Nexus New

Digital business cards & dynamic QR codes

Create dynamic QR codes, share contact info via digital business cards, capture leads at events, and track every scan in real time.

  • Dynamic QR codes with real-time analytics
  • Password-protected & encrypted codes
  • A/B testing with weighted traffic splits
  • Lead-capture forms with CRM sync
  • Digital business cards (vCard / NFC)
  • 12 module shapes, gradients, logo embedding
Fortilis

Passwords & secrets management

Zero-knowledge password and secrets management. A bring-your-own-vault model puts you in control of where your encrypted data lives.

  • Zero-knowledge client-side encryption
  • Team sharing & browser extension
  • Desktop (Tauri) + web portal
FTC by GDK Digital

Project management & team comms

Team communications and project management with secure external sharing through the Fortilis bridge.

  • Ball-in-court ownership tracking
  • Decision logs & Gantt charts
  • Secure external artifact sharing
GDK-CRM

Sales pipeline & invoicing

From lead to ledger. Built for service businesses where a deal becomes a job becomes an invoice — on one platform.

  • Sales pipeline & Kanban board
  • Deal-to-job conversion
  • Job costing & invoicing
Tavira

Field inventory for construction

Field inventory, crew management, and an AI assistant for construction teams. Mobile-first for crews who do not work at a desk.

  • Native iOS + Android (Expo)
  • Inventory + crew tracking
  • Field-ops AI assistant
Why trust it

The longest-running case study is GDK Digital itself.

We do not ship software we would not run our own company on. Before a product reaches you, it has already survived our own sales, our own credentials, our own projects, and our own field work. That is the bar.

Our sales pipeline runs on GDK-CRM — the same CRM we sell.
Our credentials live in Fortilis — the same vault we sell.
Our own builds are shipped with custom Claude Skills & agents — the practice we offer you.
When we cannot prove a claim, we do not publish it. No invented metrics, no stock logos.
Beyond the products

We build custom AI agents, Claude Skills, and web work.

The same craft we use internally is available to you — including the answer-engine and generative-engine visibility playbook we run on this very site.

Custom AI agents

Custom GPTs and Claude agents tailored to your workflow. Paige V2 is our publicly inspectable reference build in the ChatGPT store.

See our agents practice

Custom Claude Skills

Skills are how Claude does the repetitive parts of a workflow reliably and verifiably — and how we ship faster than our size implies.

See our skills practice

Web design + SEO + AEO + GEO

Website design and optimization, including answer-engine and generative-engine visibility — the same playbook we apply to our own site.

See our services
The rest of the family

Outside the platform, inside the family.

Two surfaces that carry the GDK Digital craft beyond the gdkdigital.com platform.

feathers.ai

Sibling brand · feathersai.ai

AI low-slope roofing estimator for commercial roofing pros. EPDM, TPO, and PVC takeoffs with 25+ manufacturer profiles (Carlisle, GAF, Sika Sarnafil, Mule-Hide, and more).

Independent visual identity and its own canonical domain. OAuth via the GDK platform; entitlements managed centrally.

Paige V2

Custom GPT · ChatGPT store

A brainstorming Custom GPT built by GDK Digital and published in the ChatGPT store. Free to use; some features require ChatGPT Plus.

The publicly inspectable reference build for our Custom GPT & agents practice. If you want one of your own, talk to us.

Software you can stand on, from people who already do.

Create an account to explore the platform, or talk to us about which product fits your business.