Simon Fondrie-Teitler

Infrastructure Engineer

Simon Fondrie-Teitler kept The Markup’s servers secure and stable. He left in June 2023.

Before joining The Markup, he worked as a software developer, systems administrator, and SRE for various startups as well as The University of Wisconsin–Madison.

He has also contributed to Free Software projects, including Debian and MediaGoblin.

A digital illustration in bright copic marker and pencil shows a repetitive dollar-sign motif with two solid circles overlapping in the center of the image. Where they overlap, there is a binary-code pattern of zeroes and 1s, which represents information shared digitally. Two hands reach out of the digital space. The hand on the left holds a bag of over-the-counter products. The hand on the right holds a smartphone with an app open, showing sponsored advertisements for the same products in the bag to the left.

Pixel Hunt

Need to Get Plan B or an HIV Test Online? Facebook May Know About It

Twelve of the largest drug stores in the U.S. sent shoppers’ sensitive health information to Facebook or other platforms, according to an investigation by The Markup and KFF Health News

June 30, 2023 08:00 ET

Blacklight

Blacklight Updated With New Tracker Lists

Our website scanner can now warn you about additional companies that are tracking you

May 31, 2023 12:00 ET

Pixel Hunt

Members of Congress Call for IRS to Investigate Tax Companies Sharing Data with Facebook

The Markup revealed the companies’ practices last year

February 2, 2023 11:15 ET

Illustration of a pink vacuum hose sucking up pixels and dirt from browser windows. Half of the browser windows are cleaned up of dirt and sparkling.

LevelUp

In 2023, Resolve to Fix Your Organization’s Meta Pixel Problem

It’s time to be proactive about user privacy. Find out if you’re sending too much data to Facebook—or if you need to send data at all

January 31, 2023 11:00 ET

Pixel Hunt

Sen. Elizabeth Warren Questions Tax Filing Companies, Meta, and Google About Sharing of Financial Data

Letters to the companies, signed by Warren and others, cite a recent Markup investigation

December 14, 2022 12:00 ET

Illustration of a person with purple hair and shoes, being dissolved into pixels. There are prescription bottles surrounding them and some of those bottles are also being dissolved into pixels.

Pixel Hunt

“Out Of Control”: Dozens of Telehealth Startups Sent Sensitive Health Information to Big Tech Companies

An investigation by The Markup and STAT found 49 out of 50 telehealth websites sharing health data via Big Tech’s tracking tools

December 13, 2022 06:00 ET

Photo of the exterior of an H&R Block building.

Pixel Hunt

Meta Sued for Collecting Financial Information Through Tax Filing Websites

A proposed class action was filed on Dec. 1

December 2, 2022 16:50 ET

Illustration of the Meta hand with thumbs up holding a magnifying glass over a 1040 tax form.

Pixel Hunt

Tax Filing Websites Have Been Sending Users’ Financial Information to Facebook

The Markup found services including TaxAct, TaxSlayer, and H&R Block sending sensitive data

November 22, 2022 08:00 ET

U.S. Sen. Mark Warner standing at a podium with his left hand raised. In the background, there is an American flag.

Pixel Hunt

Senator Questions Zuckerberg About Facebook’s Collection of “Sensitive Health Information”

Citing multiple Markup investigations, Sen. Mark Warner of Virginia asked Meta to detail how it collects, filters, and safeguards sensitive information

October 20, 2022 14:40 ET

Illustration of a greyed out web browser showing a hospital portal. A white hand behind it is pulling off a strip of the browser and pills are falling out of that strip. There is a blue glow behind the edge of the browser window.

Pixel Hunt

Meta Faces Mounting Questions from Congress on Health Data Privacy As Hospitals Remove Facebook Tracker

After a Markup investigation in June, 28 hospitals removed the Meta Pixel or blocked it from sending patient information to Facebook

September 19, 2022 12:25 ET

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