Building the infrastructure behind everyday payments.
FleakStack exists to make it simple for businesses and developers to move money through the products they build.
Our mission
To give every business, from a single developer to a growing platform, the payment infrastructure they need without having to build it themselves.
Payment infrastructure
We build the layer that sits between a customer's payment and a business's bank account — handling collection, checkout, transactions and notifications.
Developer-first philosophy
Every product we build starts with the API. If it isn't simple to integrate, it isn't finished — documentation and predictable behavior come first.
Business focus
Behind every integration is a business trying to get paid reliably. We design around that outcome, not around technology for its own sake.
Modern financial technology, built for what's next.
As payment behavior keeps changing, we're building FleakStack to stay flexible — so businesses can adapt without rebuilding their payment stack.
Build your next payment experience with FleakStack.
Simple APIs. Seamless checkout. Powerful payment infrastructure.