Testimonial.to
testimonial.to
Collect, manage and embed video and text testimonials from customers.
diff ~/p/damon-chen ~/p/tony-dinh
Products, revenue & stack compared side by side.
Ex-Cisco engineer who built Testimonial.to and grew acquired PDF.ai into a top AI PDF tool
Both Damon Chen and Tony Dinh are bootstrapped, build in public, have sold at least one product and are serial makers. They overlap in SaaS Founders and AI Builders. Both started building independently in 2020. Damon Chen has 8 products listed on IndieMakerList vs Tony Dinh's 6. Damon has sold 1 product and Tony 2. On revenue, Damon self-reports $1.3M ARR (Testimonial.to + PDF.ai) (as of 2024) and Tony $142K/mo (TypingMind + DevUtils) (as of 2026). On X, Damon has about 99K followers and Tony about 205K.
Revenue figures are self-reported by each maker and not audited; dates and scope differ. Highlighted categories are shared by both.
testimonial.to
Collect, manage and embed video and text testimonials from customers.
pdf.ai
AI tool to chat with, analyze and work with PDF documents; acquired by Damon for about $20K and grown from there.
chat.sh
Help center that answers customer questions directly, citing the pages it used.
pdfgen.com
Generate PDF documents with AI.
typingmind.com
Chat frontend for ChatGPT, Claude, Gemini and other LLMs, with agents, plugins and local data, sold as a lifetime license plus team plans.
devutils.com
Offline all-in-one toolbox of developer utilities for macOS.
Browser extension and tools for Twitter power users that peaked around $14K MRR.
Mac screenshot tool that makes screenshots look polished; sold for $150K.
No tools in common in their publicly listed stacks. See the indie maker tech stack.
No stack shared publicly.
No stack shared publicly.
Damon Chen self-reports $1.3M ARR (Testimonial.to + PDF.ai) (as of 2024) and Tony Dinh self-reports $142K/mo (TypingMind + DevUtils) (as of 2026). By these self-reported figures, Tony Dinh's reported monthly revenue is higher. Figures are unaudited and may cover different periods or businesses, so treat them as rough indicators.
Damon Chen has 8 products listed (including Testimonial.to, PDF.ai and Chat.sh); Tony Dinh has 6 products listed (including TypingMind, DevUtils and Black Magic).
Damon Chen: San Jose, United States. Tony Dinh: not listed.
Damon Chen started in 2020 (6 years indie); Tony Dinh started in 2020 (6 years indie).
Yes, both are listed as bootstrapped founders on IndieMakerList.
Read the full story, timeline and links on Damon Chen's profile and Tony Dinh's profile.