Show HN: Claude Code for Customer Support

Letterbook is an AI-powered customer support platform that integrates with email, databases, Stripe, Shopify, and other tools to draft ticket resolutions for one-click approval. Built by founders who previously grew an AI personal assistant app to 100k users, it offers a discounted pricing model for startups, positioned as a lower-cost alternative to Fin, Zendesk AI, and similar platforms.