# Signal after WhatsApp's privacy update

> Signal gained an estimated 50.6M January installs after a WhatsApp privacy backlash.

- Owner: Signal Technology Foundation / Signal Messenger
- Kind: Trend & aesthetic
- Sector: Technology
- Seed date: 2021-01-06
- Peak proxy date: Week of Jan 17, 2021
- Date basis: Proxy date; not a directly measured attention peak. Some dates are known only to the week, month or year.
- Spread Score: 54 (Notable), v1.3
- Mechanics: Controversy, Celebrity amplifier, Platform jump, Press loop, Pairing

## Summary

WhatsApp's terms notice prompted public calls to switch. Musk endorsed Signal, which topped app charts and struggled with signups and an outage. January daily-download estimates placed the high in mid-month; adoption slowed afterward.

## Timeline

- 2021-01-06 — WhatsApp (Group chats) — WhatsApp sent users a notice requiring acceptance of updated terms by February 8.
- 2021-01-06 — @mikebutcher (X) — Mike Butcher urged WhatsApp users to move to Signal or Telegram after the terms notice.
- 2021-01-07 — Elon Musk (X) — Musk posted "Use Signal" to an audience reported at 41.5 million followers.

The full timeline, metrics and sources are on the case page, or via the Pro API (https://howitspread.com/mcp#api).

Canonical URL: https://howitspread.com/cases/signal-whatsapp-exodus

Cite as: How It Spread (2026). “Signal after WhatsApp's privacy update.” Case HIS-01701. Spread Score v1.3: 54/100. Updated 2026-10-25. https://howitspread.com/id/HIS-01701