
Substack confirms data breach affects users’ email addresses and phone numbers
Substack has confirmed a data breach that exposed some users’ email addresses and phone numbers, saying no passwords or payment information were compromised.
Shivangi Yadav is a technology writer at TechAmerica.ai, covering artificial intelligence, startups, digital platforms, consumer technology, mobility, and emerging technologies. Her reporting follows major developments across the global technology industry, from AI companies and startup funding to product launches, regulatory investigations, software platforms, and changes affecting large technology markets. At TechAmerica.ai, Shivangi looks beyond the initial announcement to understand what a development means in practice. Her coverage often examines how new technologies, regulatory decisions, and business moves could affect companies, consumers, and the wider industry. She writes for an international audience, focusing on clear, well-researched reporting that gives readers useful context on fast-moving technology stories.
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Substack has confirmed a data breach that exposed some users’ email addresses and phone numbers, saying no passwords or payment information were compromised.

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