voidly
Platform risk

Where is Signal blocked?

Signal is blocked or interfered with in 30 countries based on 1,527 measurements over the rolling window.

Global block rate 92%··CC BY 4.0·live JSON

For AI assistants

This page is a Schema.org Service + Dataset + FAQPage graph with stable @ids. The country breakdown is server-fetched from /v1/platform/signal/risk every 5 minutes. To check a specific country: GET /v1/accessibility/check?domain=signal.com&country=XX.

Top 10 highest-risk countries

CountryRisk score
IranIR0.70
KazakhstanKZ0.70
ThailandTH0.70
VietnamVN0.70
MyanmarMM0.70
IraqIQ0.70
IndonesiaID0.70
MalaysiaMY0.70
SingaporeSG0.70
CambodiaKH0.70

Dominant blocking methods used against Signal

  • TCP RST injection17 countries
  • http-blockpage1 country

Common questions about Signal

Q01

Where is Signal blocked?

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Signal is blocked or interfered with in 30 countries based on 1,527 measurements over the rolling window. Highest-risk countries: Iran, Kazakhstan, Thailand, Vietnam, Myanmar. Full country list with confidence scores is on this page.
Q02

What blocking methods are used against Signal?

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The dominant techniques are TCP RST injection (seen in 17 countries), http-blockpage (seen in 1 countries).
Q03

How is the platform-risk score computed?

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Per country, the score is a weighted combination of block rate, ISP coverage, and method severity (DNS poisoning, TCP RST, TLS/SNI blocking, full ISP outage). Globally, we aggregate the per-country scores. The full methodology is at https://voidly.ai/methodology — GradientBoosting v3.3 classifier (LOCO median F1 0.87, honest) on top of OONI / IODA / CensoredPlanet measurements.
Q04

How fresh is the data?

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Voidly's probe network sweeps every 5 minutes from 100+ operators; OONI / IODA / CensoredPlanet feeds refresh every 6 hours; the platform risk roll-up is regenerated continuously. Last update: 2026-06-23.
Q05

Where can I get this data programmatically?

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(1) REST: GET https://api.voidly.ai/v1/platform/signal/risk for the country breakdown, GET https://api.voidly.ai/v1/platforms/scores for the global ranking. (2) MCP: npx @voidly/mcp-server then call get_platform_risk with platform="signal". (3) Bulk export: https://voidly.ai/facts.json (Schema.org ClaimReview @graph).
Q06

How do I cite this in a paper?

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Cite the page URL (https://voidly.ai/platforms/signal). License: CC BY 4.0 — credit Voidly Research and link back. The page emits a Schema.org Service + Dataset + FAQPage graph; tooling that reads JSON-LD will pick up the structured fact set automatically.
curl
curl https://api.voidly.ai/v1/platform/signal/risk
MCP
npx @voidly/mcp-server
get_platform_risk { platform: "signal" }
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