Edition ·

May 26, 2026

Autumn

Open-source billing infrastructure for AI, built on Stripe.

Developer ToolsBillingAI Infrastructure

Autumn Handles the Billing Code You Keep Putting Off

Billing logic for AI products is a special kind of painful. Usage-based pricing, credit systems, feature gating, plan migrations. Autumn puts all of it in a layer over Stripe so you stop building billing code from scratch.

Design Arena

Design Arena Lets the Crowd Decide Which AI Design Tool Actually Works

AI models can pass bar exams but still produce UIs with white text on white backgrounds. Design Arena pits AI models against each other on real creative tasks and lets actual humans vote on which output is better. Simple concept, hard to replicate, and increasingly important.

AI Design

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