Plenty of traders are good at calling the market and terrible at running the software business around it. They want to sell signals; instead they end up wrestling with payment integrations, subscription churn, and a Telegram bot that keeps falling over. SignalCartel is the platform I built so they don't have to.
The problem: everyone rebuilds the same plumbing
A trading-signals business has a predictable spine: collect subscriptions, manage who's paid, deliver signals to paying members, and cut off the ones who lapse. Every operator rebuilds that spine from scratch — badly — and spends their time on infrastructure instead of the thing they're actually good at.
The solution: white-label the whole spine
SignalCartel is a white-label SaaS: an operator launches a branded signals service on a codebase I manage, and gets the entire commercial spine out of the box.
- Billing and subscriptions handled through Stripe — recurring revenue, upgrades and cancellations without custom payment code.
- Telegram delivery — signals pushed to paying members automatically, with access tied to subscription status.
- A managed codebase — the operator runs their brand, I keep the platform reliable, patched and evolving.
- Branding that's theirs, infrastructure that's mine — the literal definition of white-label.
The engineering choices
The stack is chosen for reliability under real money and real subscribers:
- Next.js and Supabase for the application and data layer.
- Stripe for billing — the boring, battle-tested choice, on purpose.
- The Telegram API for delivery, with subscription state as the gatekeeper.
- PM2 and Caddy on the operations side — process management and TLS that keep the service up without drama.
The operator should think about signals. The platform should think about everything else. That division of labour is the entire product.
From SignalCartel to SignalKit
SignalCartel started as a specific service and proved the model. I'm now productising it as SignalKit — the same managed spine, packaged so any operator can stand up their own branded signals business quickly. It's a clear example of the pattern I like best: take infrastructure that's painful to build once, build it well, and let other people launch on top of it.