
Letterbook
Letterbook provides an AI-native customer support platform that connects a company's inbox, database, and Stripe account so AI agents can resolve tickets alongside the team. The platform offers omnichannel ticketing across email, Discord, web forms, and mobile apps, with AI drafting replies using real customer data and executing one-click actions like refunds with human approval. It auto-generates a knowledge base from resolved tickets and includes an inline cmd+K AI assistant for mid-ticket questions.
- AI Agents
- Artificial Intelligence
- Enterprise Software
- Software Only
Funding
Raised to date
$500KRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.

Founders
Founder details are not available yet.
Product
Problem
Traditional customer support platforms like Zendesk are built for enterprise teams with dedicated support ops staff, requiring days or weeks of configuration before they become useful. Their AI features are expensive add-ons that only integrate with a static knowledge base, so they cannot pull from a customer's database or Stripe account to actually resolve complex tickets. For startups and small teams, this means slow setup, manual knowledge-base maintenance, and AI that suggests canned articles rather than solving real problems.
Solution
Letterbook provides an AI-native customer support platform that connects a company's inbox, database, and Stripe account so AI agents can resolve tickets alongside the team. The platform offers omnichannel ticketing across email, Discord, web forms, and mobile apps, with every message landing in a single inbox. Its AI drafts replies using real customer data—pulling from the database, Stripe, and knowledge base—and can execute one-click actions like refunds and cancellations with human approval. A built-in cmd+K shortcut lets agents ask the AI questions mid-ticket and get answers grounded in actual customer context. Letterbook also auto-generates and maintains a knowledge base from resolved tickets, eliminating manual documentation work.
Target Audience
Primary users are startup founders, small support teams, and AI-forward companies that need fast setup and AI assistance from day one, rather than enterprise-grade configuration and agent management tools.
Features
- Omnichannel ticketing that unifies email, Discord forums, web form submissions, and mobile app requests into one inbox
- Database and Stripe integrations that give AI agents full customer context, including subscription status and payment history
- AI-drafted replies for every ticket, built from live customer data and prior interactions
- Inline AI assistant via cmd+K that answers mid-ticket questions about customer plans, payments, and past communications
- One-click actions for refunds, cancellations, and plan changes that surface contextually and require human approval
- Auto-generated knowledge base that learns from resolved tickets and updates documentation without manual writing
- Analytics dashboard for tracking support performance and ticket trends