Last updated 07-17-2026
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Jesse Zhang
JesseZhang.org is the personal site of Jesse Zhang, a Harvard computer science graduate and former founder of Lowkey, the social gaming startup acquired by Niantic in 2021. The site doubles as a portfolio and a playground for interactive web projects spanning games, finance, cryptography, and language models.
The Fun Projects section hosts live demos you can try in the browser: real-time multiplayer Camel Up and Bananagrams built in 3D with WebGL, a Financials Visualizer for US public company 10-K statements, a ZK Mastermind proof demo, and a Custom GPTs page that shows how to feed scientific papers and other sources into an LLM for domain-specific Q&A.
It is aimed at developers, students, and curious visitors who want working examples of creative engineering rather than a traditional product landing page. The About and Angel Investments sections cover Zhang's background, current startup work in San Francisco, and portfolio companies such as Cursor, Pika AI, and LlamaIndex.
Play Camel Up in real time with friends in a 3D WebGL room
Bananagrams multiplayer with custom rules and keyboard shortcuts
Financials Visualizer charts income, balance sheet, and cash flow from 10-K filings
ZK Mastermind returns guess feedback with a zero-knowledge proof attached
Custom GPTs demo connects papers, podcasts, and other sources to an LLM chat
Bundles several polished browser demos in one portfolio site.
Multiplayer board games run in real time with 3D WebGL rendering.
ZK Mastermind ships with a public circuit gist and on-page proof details.
Financials Visualizer covers all three core statements for US public companies.
The Custom GPTs demo is currently disabled due to volume.
Financials Visualizer only supports annual 10-K data, not quarterly reports.
Several demos, including Financials and the LLM page, require a larger screen.
Is JesseZhang.org free to use?
Yes. JesseZhang.org is a personal portfolio site, and the interactive demos listed under Fun Projects are free to open in your browser. There is no pricing page or paid tier on the site.
What does the Custom GPTs demo on JesseZhang.org do?
The Custom GPTs page at JesseZhang.org/llmdemo shows how to connect data sources such as scientific papers, podcasts, and curated examples to GPT so you can ask questions about that material. Users could optionally supply their own OpenAI API key via a set_key command when the demo was active.
Is the LLM demo on JesseZhang.org currently available?
The Custom GPTs demo on JesseZhang.org is currently disabled due to volume, according to the page notice. JesseZhang.org also notes the experience is not yet optimized for mobile and works best on a larger screen.
What financial data does the Financials Visualizer support?
JesseZhang.org/financials visualizes the three main financial statements for publicly listed US companies. The API currently supports annual 10-K data only, not quarterly filings.
Can I play multiplayer games on JesseZhang.org?
Yes. JesseZhang.org hosts real-time multiplayer versions of Camel Up and Bananagrams. Camel Up runs in 3D with WebGL, and both games let you create a session and play with friends.
How do I follow Jesse Zhang's current work?
JesseZhang.org links to Jesse Zhang on Twitter at twitter.com/thejessezhang and LinkedIn at linkedin.com/in/thejessezhang. The site states he is starting a new company based in San Francisco.