By investigators, for newsrooms.
Online sources disappear. Your evidence shouldn’t.
Capture, preserve, and re-use web content — creating tamper-evident capsules that hold up under scrutiny. On your infrastructure, under your control.
In pilot with European investigative newsrooms.
30-minute call and demo to hear about your workflows.
Supported by
How it works
From capture to published evidence
One workflow — from the moment you capture a page to a verifiable source in your published story.
Capture
One click turns any page — social media and logged-in content included — into a faithful, interactive capsule, made right on your machine.
Organise & collaborate
Build a shared source desk: organise captures, deep-link to the exact highlight, and collaborate with your team.
Publish & embed
Keep a capsule private, share it with your team, or publish and embed it on your own site. Private by default — nothing leaves your machine unless you choose.
GDPR-compliant
Built in Germany, designed for European data protection standards from day one.
eIDAS-aligned
Cryptographic signatures aligned with European electronic identification standards.
On-premises
Deploy on your own infrastructure. No cloud dependency, no third-party data access.
Courtroom and library-ready
Built on standards designed to stand the test of time.
From the field
News and Research
Dispatches about our work, product, and collaborations.
A byline for the evidence
Journalism has always run on attribution — who saw it, who stands behind it. Chain of custody is the byline extended to your sources. And it forces an honest reckoning with what a faithful record actually contains.
Every investigation should start with an empty browser
A small ritual borrowed from the Berkeley Protocol — and what it really protects. A note on hygiene before evidence.
Your screenshot won't survive a legal challenge. Here's what will
Chain of custody isn't just for courts. When a reader asks "how do I know you saw this?" — here's what journalists and newsrooms need to know about web archiving and chain of custody.
How to use evidx: capture, organize, and annotate
A step-by-step guide to capturing tamper-evident web archives, organizing them into Collections, and annotating captures as evidence in evidx.
Team
Built by investigators, for investigators
Founders
Basile Simon
Basile is a researcher working at the intersection of engineering, law, and journalism. He co-founded Airwars in 2014 and has designed archiving and verification workflows ever since.
Niko Para
Niko co-founded Syrian Archive in 2014 and has since worked with NGOs and media organisations, including Security Force Monitor. He co-founded DOT • STUDIO with Tilman.
Tilman Miraß
Tilman works at the intersection of technology, politics, and journalism. As a developer at Deutsche Welle, he built AI-powered tools for investigative journalism. He co-founded DOT • STUDIO in 2024.
Support staff
Phương Trịnh
User experience
Malie Bertram
Engineering and customer support
Advisors
Mirko Lorenz — Innovation Manager, Deutsche Welle; Chairman and former CEO, Datawrapper GmbH
Tessa Walsh — Senior Engineer, Webrecorder; librarian and scholar in North America
Beni Buess — Former head of product, Livingdocs AG
Michael Ertl — Editor / Chef vom Dienst, Tagesschau / ARD
Let's talk about your newsroom.
We help investigative teams preserve the evidence that matters. Tell us about your workflow.