START: Dawson Chen, CEO & Founder, Letterbook "AI-native customer support platform"

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100,000 users sounds like a dream

Until you're personally answering 50+ support tickets a day...

That was Dawson Chen.

He'd scaled Martin, an AI personal assistant, to more than 100,000 users, but growth came with a new problem:

Refund requests

Subscription cancellations

Login issues

And the same support questions over and over again...

To keep up, the team hired a virtual assistant and relied on tools like Zendesk and Freshdesk.

But every ticket meant jumping between their inbox, Stripe, their database, and their knowledge base.

The software wasn't built for how startups actually operate.

So instead of accepting it, they built the tool they wished they'd had.

Then shared it with a few founder friends.

The response was immediate.

That internal tool became Letterbook.

Today, Letterbook is the AI-native alternative to Zendesk, Freshdesk, Zoho Desk, and Intercom - built specifically for startups.

It connects to your inbox, Stripe, database, and knowledge base, then drafts a complete resolution for every support ticket: the reply, the refund, the cancellation, the next action.

For many customers, 70–80% of tickets become a single approval instead of minutes of manual work.

Their Product Hunt launch reached #3 Product of the Day.

Most customer support platforms were built for enterprise support teams.

Letterbook was built for founders."The modern AI-native support platform"

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🎙️ Dawson Chen, CEO & Founder, Letterbook on Fondo START pod

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00:32 — From a 100,000-user AI app to discovering a support bottleneck

01:08 — Turning an internal tool into Letterbook

02:09 — Why AI-native support beats legacy help desks

02:47 — How context-aware AI drafts actions, not just replies

03:23 — Automating 70–80% of repetitive support work

04:20 — Why Letterbook is purpose-built for B2C startups

04:55 — Two YC founders, two co-founder breakups, one new company

06:42 — Building the default customer support platform for startups

08:08 — Lessons from launching to #3 on Product Hunt

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Check out www.letterbook.ai

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