About DataShadow
Built during Hack Club's Summer of Making 2025, DataShadow is a one-dev passion project designed to help people find out if their emails have been exposed in data breaches — without giving up their privacy in the process.
Hack Club
Summer of Making 2025
DataShadow was created during Hack Club's Summer of Making — a global event where students build stuff that actually matters (and have fun doing it).
I wanted to create a tool that helps people check if their data has been leaked, without needing tech skills or giving up their privacy.
Wanna know more about Summer of Making?Our Story
DataShadow started as a solo project during Hack Club's Summer of Making — just one developer (hi, it's me 👋) trying to build something useful.
I wanted to create a tool that helps people check if their data has been leaked, without needing tech skills or giving up their privacy.
What began as a summer experiment is now a working platform that blends simplicity, speed, and privacy-first design — with more improvements on the way.
"The journey of building DataShadow is far from over — I'm excited to keep helping people protect their digital identities while growing every day as a developer."
Our Mission
Privacy shouldn't be complicated — and it definitely shouldn't only be for tech nerds. DataShadow exists to make privacy tools simple, accessible, and actually useful.
Privacy First
From k-anonymity lookups to zero logging, your data stays yours.
Mostly Open Source
The frontend is public, backend is staying private (for now).
Solo-Built, Community Inspired
It's just me, but the Hack Club vibe kept it alive.
Built by One, Boosted by Many
While DataShadow was built solo, it wouldn't exist without the Hack Club community.
Summer of Making gave me the motivation, support, and occasional chaos needed to ship something real.
No fancy teams. No expert reviews. Just learning by building — and sharing it along the way.
Contribute Code
frontend's open source
Spread the Word
help others stay safe
Be Loud
I feed on feedback & good vibes
DataShadow's Entire Team
It's just me — experimenting, learning, and building as I go.
No big team. No VC. No fake titles (okay maybe just one below 👇).
Eric Zilvytis
CEO? Sure. CTO? Why not.
Builder of DataShadow. Summer of Making enjoyer. Privacy enjoyer. Still winging it.
Join the Chaos (Mission*)
Building a more private internet — one sketchy breach at a time.
Jump in or just cheer from the sidelines. 🫡