Letterbook
Letterbook provides an AI-powered support agent for founders that connects to their stack (inbox, database, Stripe) to automatically resolve customer tickets.
At a Glance
- Founders
- Early-stage startups
- SaaS companies
AI Tools by Letterbook
(1)
Letterbook
AI Support Agent for Founders
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Latest News
Martin (now Letterbook) Raises $2M Seed to Build AI Assistant Technology
Ethan Hou shares Martin's growth to $100k Monthly Revenue
Letterbook (Martin) launches in Y Combinator Summer 2023 batch
Letterbook Launches AI-Native Support Platform for Founders
Products & Services
An AI-native customer support platform that integrates with inboxes, databases, and Stripe to automatically resolve customer tickets.
Market Position
Letterbook differentiates by being 'founder-first' and deeply integrating with the company's existing data stack (DB/Stripe) to resolve tickets rather than just chatting.
Leadership
Founders
Dawson Chen
CEO of Letterbook. Dropped out of Yale University to start the company. Previously co-founded Martin AI (YC S23), which grew to over 100k users.
Ethan Hou
Co-founder of Letterbook. Dropped out of UC Berkeley (where he was a software engineering student) to start the company. Previously co-founded Martin AI (YC S23).
Executive Team
Dawson Chen
Co-founder & CEO
Yale dropout, serial AI entrepreneur.
Ethan Hou
Co-founder
UC Berkeley dropout, software engineer and AI researcher.
Founding Story
The founders started with Martin AI, a personal voice assistant. After growing to 100,000 users, they faced a massive support burden. They built an internal AI tool to handle their own support tickets, which proved so effective they pivoted to offer it to other founders as Letterbook.
Business Model
Revenue Model
Subscription-based SaaS with tiers based on seat count and ticket volume.
Pricing Tiers
3 seats, 300 tickets/month, DB & Stripe integrations, unified inbox.
10 seats, 1,000 tickets/month, all channels and integrations, priority support.
Custom seats, 3,000+ tickets/month, SSO/SAML, dedicated account manager.
Target Markets
- Founders
- Early-stage startups
- SaaS companies
- Automating customer support for high-growth startups
- Managing refunds and subscription queries via Stripe integration
- Resolving technical issues using database lookups
- Scalable support for small founding teams
- 30,000+ users on previous product iteration