We build custom software around how your business actually works. Not a generic platform trying to solve 100 problems you don't have. It's built for you, exclusive to you, and can be adjusted whenever you need.
Generic tools force you into someone else's workflow. We build software that works the way you do.
Generic software comes loaded with 100 features. You use 3. You're paying for — and navigating around — the other 97.
Adapting your process to fit the tool instead of the other way round. Spreadsheets to fill the gaps. Manual steps because the software can't do it your way.
Want to change how something works? Submit a feature request and wait. Your business evolves — your software doesn't.
Every line of code is written for your business. Not a template. Not a platform you share with 10,000 other companies. Yours.
Your pricing, your branding, your workflow. Type in the job details and get a professional PDF quote in seconds — built around how you actually quote, not how some app thinks you should.
Your clients already live on WhatsApp. We connect your exact business workflows to it — your replies, your confirmations, your status updates. Not a chatbot. Your process, automated.
Built around your teams, your jobs, your clients. Not a generic calendar with features you'll never touch. Reminders, routing, availability — set up exactly how you need it.
One screen showing exactly what matters to you — not 50 tabs of data you don't care about. Your metrics, your view, updated in real time.
No 6-month implementation projects. No consultants who bill by the hour. Your software, built fast, adjusted whenever you need.
30-minute call. You tell me what's not working. I tell you exactly what I'd build and what it'll cost. No jargon, no sales pitch.
Software built around your exact workflow — not a template adjusted to sort of fit. Demo within 2 weeks. We iterate until it's perfect. You only pay when you're happy.
Your software goes live. I handle maintenance and updates. Need something adjusted? I'm one message away. It evolves with your business.
Every project is different because every business is different. Here's what custom software looks like in practice.
Security Installations — Cape Town
Carl was spending 2+ hours per quote — manually checking supplier prices, building documents in Word, calculating totals by hand. Now he types in the job details and gets a professional branded PDF quote in under 30 seconds, with prices automatically pulled from the trade catalogue.
"I used to dread doing quotes — now I fire them off between jobs. The system knows all the product prices. I just describe what the client needs."
AI Automation Platform — levity.ai
Before starting Keystone, Felix was part of the core development team at Levity — an AI automation platform for enterprise logistics built by Rees Calder. From early-stage idea to a production system processing over 100 million emails, Levity became a seven-figure business serving enterprise clients worldwide. That hands-on experience shaped everything about how Keystone builds software today.
"Felix was a key part of the team that built Levity from the ground up. Purpose-built, deeply integrated, and constantly evolving with the business it serves — that's the standard of work he delivers."
Airbnb Property Management — 20 Properties, Cape Town
Homely manages 20 Airbnb properties across Cape Town with WhatsApp groups for each owner, cleaning teams, and maintenance staff. We built a system that monitors all communication channels, extracts tasks automatically, tracks bookings via calendar sync, and keeps owners informed without them having to chase anyone.
"I used to spend my mornings scrolling through 20 WhatsApp groups. Now I get a single summary of what needs my attention."
I'm Felix, founder of Keystone, based in Cape Town. I build custom software for businesses that are tired of generic tools doing 100 things badly.
Before Keystone, I was part of the core dev team at Levity — an AI platform processing over 100 million emails for enterprise logistics clients. That taught me something: the best software is built around how a business actually works, not how a software company thinks it should.
Every client gets software that's theirs. Built for their workflow, exclusive to their business, and adjustable whenever they need it. No feature bloat. No compromises. No sharing a platform with thousands of other companies. Just software that fits.
No upfront costs. No surprise invoices. A flat monthly fee that covers your custom software, maintenance, updates, and support. Need something changed? It's included.
* Also dependent on UN token expenditure.
30-minute call. No commitment. Tell me what's not working with your current setup, and I'll show you exactly what I'd build. If it doesn't make sense, no hard feelings.
I'll be in touch on WhatsApp within 24 hours.