Testimonial.to
testimonial.to
Collect, manage and embed video and text testimonials from customers.
diff ~/p/damon-chen ~/p/jacky-chou
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
Founder of Indexsy; builds SEO and AI tools like LocalRank.so and Trackings.ai in public
Both Damon Chen and Jacky Chou are bootstrapped, build in public and are serial makers. They overlap in SaaS Founders, AI Builders and Marketing & SEO Tools. Damon is based in San Jose, United States, Jacky in Vancouver, Canada. Damon started in 2020 and Jacky in 2015. Damon Chen has 8 products listed on IndieMakerList vs Jacky Chou's 8. Damon has sold 1 product. On revenue, Damon self-reports $1.3M ARR (Testimonial.to + PDF.ai) (as of 2024) and Jacky $2.92M in 2025. On X, Damon has about 99K followers and Jacky about 63K.
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.
indexsy.com
SEO agency and holding company selling link building, audits and LLM-visibility services.
localrank.so
All-in-one AI local SEO software for agencies managing Google Business Profiles.
advise.so
Private paid community of 650+ marketers and SEOs.
trackings.ai
AI rank tracker that also measures brand visibility in AI search answers.
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 Jacky Chou self-reports $2.92M in 2025. By these self-reported figures, Jacky Chou'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); Jacky Chou has 8 products listed (including Indexsy, LocalRank.so and Advise.so).
Damon Chen: San Jose, United States. Jacky Chou: Vancouver, Canada.
Damon Chen started in 2020 (6 years indie); Jacky Chou started in 2015 (11 years indie).
Yes, both are listed as bootstrapped founders on IndieMakerList.
Read the full story, timeline and links on Damon Chen's profile and Jacky Chou's profile.