PDF.ai

AI tool to chat with PDF documents, plus an API to parse, extract and split PDFs.

AIDocumentsAPIBootstrappedAcquired side project

Active^{Source [4]}^{Source [6]}Last verified Oct 2, 2026

About PDF.ai

PDF.ai lets users chat with any PDF using AI to ask questions, get summaries and find answers, and offers an API for developers to parse documents, extract data and split PDFs in their own workflows.^{Source [4]}

The product started as Looseleaf.ai, a weekend project by its original developer that let users chat with one PDF at a time and had no monetization. Damon Chen acquired it in May 2023 for $20,000, rebranded it to PDF.ai and added paid plans, starting with a $99 lifetime deal that drew more than 300 buyers over three months; he used that revenue to hire a full-time engineer.^{Source [1]}^{Source [2]}

Chen has said most traffic is organic search for "PDF AI", which he attributes to the exact-match domain. He reported $35K in revenue within about a month of the purchase, later $50K+ MRR, and $500K+ ARR by November 2023; these figures are self-reported.^{Source [1]}^{Source [2]}^{Source [5]}

In October 2023 Chen described PDF.ai as bootstrapped and profitable, with a goal of several million dollars in ARR rather than becoming a venture-backed unicorn.^{Source [3]}

What happened

PDF.ai began as Looseleaf.ai, a weekend project with no revenue, which Damon Chen bought for $20,000 in May 2023 and rebranded under the PDF.ai domain. By his account it passed $50K MRR and $500K+ ARR within months, and it remains a bootstrapped product he runs alongside Testimonial.^{Source [1]}^{Source [2]}^{Source [5]}^{Source [6]}

Timeline

2023-11Founder reports $500K+ ARR.^{Source [5]}
2023-10Chen describes PDF.ai as bootstrapped and profitable with a multi-million ARR goal.^{Source [3]}
2023-06Chen reports $35K in revenue since the purchase.^{Source [2]}
2023Sells a $99 lifetime deal to 300+ buyers; revenue funds a full-time engineer.^{Source [1]}
2023-05Damon Chen buys Looseleaf.ai for $20,000 and rebrands it as PDF.ai.^{Source [1]}^{Source [2]}

Products and brands

Chat with PDF: Ask questions, get summaries and find answers in uploaded PDFs.^{Source [4]}
PDF API: Developer API to parse documents, extract data and split PDFs.^{Source [4]}

How it makes money: Paid subscriptions for AI document chat and API usage; launched monetization with a $99 lifetime deal in 2023.^{Source [1]}^{Source [4]}

Leadership

Damon Chen

Owner^{Source [1]}^{Source [6]}

Since 2023

Funding and financials

ARR: $500K+ (Nov 2023, self-reported in interview)^{Source [5]}
MRR: $50K+ (self-reported, undated interview)^{Source [1]}
Revenue: $35K in about the first month after purchase (Jun 2023, self-reported on X)^{Source [2]}
Acquisition price: $20,000 (May 2023, self-reported on X)^{Source [2]}

People on Founded, and where they went next

1 person on record, connected to 5 other companies.

Person	Here	Also built
Damon Chen	Owner (acquirer)2023 to now	Testimonial2020 to nowActiveBacklogs2020Status unknownInfluenswer2020Status unknownHowdy2020Status unknownIndieLog2020Status unknown

Sources

PDF.ai Founder Interview, SaaS Starter Stack. Accessed Oct 2, 2026.
Early last month, I bought pdf.ai for $20k (post by Damon Chen), X, 2023-06-05. Accessed Oct 2, 2026.
I'm optimistic about PDF.ai (post by Damon Chen), X, 2023-10-29. Accessed Oct 2, 2026.
PDF.ai: Chat with PDFs and PDF API (parse, extract, split), PDF.ai. Accessed Oct 2, 2026.
Damon Chen: From Engineer to Indie Hacker Making $1,300,000 ARR, Creator Economy (Peter Yang), 2023-11-29. Accessed Oct 2, 2026.
X profile @damonchen (via fxtwitter API), X. Accessed Oct 2, 2026.

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