Websites
Clear, fast, accessible sites that make it easy to understand what you do and take the next step.
Explore serviceKarstline / Bentonville, Arkansas
Useful digital products, built around real work.
Karstline designs and builds websites, custom software, and practical AI tools for organizations outside retail and CPG.
Services
What we build
Custom software
Focused web apps and internal tools built around the way your organization actually works.
Explore serviceAI & automation
Practical, responsible ways to remove repetitive work or improve a decision outside retail and CPG.
Explore serviceHow we work
Start small. Build the useful thing. Learn from real use.
No oversized transformation program and no technology for its own sake—just a clear problem, a focused build, and an honest measure of whether it helped.
About
Doug Ryner
Doug is a software developer turned product leader who has spent more than 25 years making difficult technology and workflow problems easier to understand and use.
Karstline is a focused outlet for that builder mindset: practical websites, software, automation, and AI-enabled tools.
25+ years building technology 16 U.S. patents
Journal
Latest field note
Build before you buy: a practical way to approach AI
A small working prototype can reveal more about an AI opportunity than weeks of abstract debate or a polished vendor demo.
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