Substack confirms data breach affects users’ email addresses and phone numbers

Market Intelligence Analysis

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Why This Matters

Substack has confirmed a data breach affecting users' email addresses and phone numbers, which occurred in October 2025 but was only discovered in early February.

Market Impact

Market impact analysis based on bearish sentiment with 70% confidence.

Sentiment
Bearish
AI Confidence
70%
Time Horizon
Short Term

Article Context

Note: This is a brief excerpt for context. Click below to read the full article on the original source.

Substack said that customer data was accessed in October 2025, but wasn't discovered until early February.

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Full article on TechCrunch
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Original article published by TechCrunch on February 5, 2026.
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