Verisum

Inspiration

With the rise of AI, the internet is flooded with information. Finding reliable and relevant content has become harder than ever, especially with the spread of misinformation. Verisum helps you cut through the noise by finding exactly what you’re looking for while fact-checking the entire website through a strict verification pipeline.

What It Does

Verisum is a browser extension that:

Answers questions about any webpage in real time.
Highlights and fact-checks suspicious claims.
Delivers verified, source-backed information directly from the site you’re viewing.

How We Built It

We built Verisum as a Chrome extension powered by OpenAI for language understanding and verification. The UI is built with Preact, while Transformers.js, Google Fact Check, and Wikipedia form the backbone of our verification process. To optimize efficiency, we reduced the prompt size by ~96%, lowering the cost per request to $0.0014 without sacrificing quality.

Challenges we ran into

Speeding up the fact-checking process.
Handling dynamic pages and extracting reliable citations.
Minimizing token usage while maintaining accuracy.

Accomplishments that we are proud of

Developed a robust pipeline that flags false claims effectively.
Designed an intuitive extension for both casual users and researchers.
Achieved high verification confidence.
Reduced token usage by 96% with no quality loss.

What we learned

Embeddings, vector databases, and semantic search.
Building OpenAI backends and integrating Transformers.js.
Caching, rate limiting, and efficient state management across content scripts, service workers, and popups.
Effective teamwork and agile development practices.