About Costly
Every wasted token costs you money and the planet energy. We fix both.
The problem
AI APIs are a black box when it comes to cost. You ship a feature, calls start flowing, and at the end of the month you get a bill that's 3x what you expected. No breakdown, no explanation, no idea what to fix.
Most developers don't know they're using Opus where Haiku would work. They don't know 40% of their calls are duplicates. They don't know one feature is eating 70% of their budget.
The numbers nobody talks about
Of real water consumed every 20–50 AI prompts. Your code has a water bill.
Wasted on cloud compute every year. Idle GPUs, redundant calls, oversized models.
Consumed by data centers in 2024. More than the entire UK uses at home.
Our mission
The AI industry is scaling fast — but efficiency isn't scaling with it. Every wasted token heats a GPU, draws power, and consumes water to cool it back down.
Costly exists to make AI development sustainable by default. Not through guilt, but through visibility. We believe the developers building with AI today will shape how responsibly it scales tomorrow.
Open source, always
The Costly SDK is fully open source — read every line, contribute, or fork it. Cost transparency tools shouldn't be a black box themselves. The dashboard and waste engine are hosted for you, but the SDK that wraps your API calls is yours to inspect and trust.
Your AI is Costly.
Let's fix that.
One install. 7 waste detectors. Every wasted dollar, found.