Rumrunner is a background daemon for macOS. It serves an OpenAI-compatible endpoint on localhost, so the tools you already use — Cline, Continue, aider, Zed — point at it by editing their config. Every request is routed to whichever engine can actually do that job, and you get an itemised receipt of what it saved.
Every routing decision is logged with its inputs, on your machine. The ledger adds them up and tells you what you actually saved against paying frontier prices for everything — including the months when the answer is “not much”.
Illustrative figures. Your numbers will be your own.
Rumrunner is a small monthly subscription to a piece of software, and it is the only thing we charge for. Frontier tokens are billed by Anthropic or OpenAI on your own key, at cost. We never take a cut of your inference.
What the subscription pays for is the part that never finishes. New models land every few weeks, the runtimes they need move under us, and each one has to be measured on real work before the router is allowed to send anything to it. You could wire a version of this up yourself in a weekend. Keeping it right after that is the expensive part, and it is the part we are actually selling.
You also get someone to complain to. If it will not do what you need, ask for the feature and a human reads it.
And if the receipt says we saved you nothing, cancel. It is computed on your machine, from a decision log you can open and read line by line.
Rumrunner is an AI developer tool: a macOS application that routes large language model requests from coding tools to local models, hosted open-weight models, and the Anthropic, OpenAI and DeepSeek APIs. It is made and sold by Whatever, No Big Deal LLC, a United States company, and the product is a software subscription.
The name is a Prohibition-era joke about not watering down what you deliver. We do not sell, ship, or have anything to do with alcohol. There are no physical goods, no gift cards, no credits, no tokens, and no resale of anyone else’s API: the API keys are yours, and the providers bill you directly on your own account.
Questions about the business: hello@getrumrunner.com.