Side by side
✓ yes~ partial✕ no— not applicable
- Vantage point✓4 independent sources + own probes~Cloudflare network only
- Scale of underlying data~2.2B+ measurements (via OONI)✓~20% of internet traffic
- Censorship-specific focus✓Sole focus~One section of broader product
- Citable incident IDs✓IR-2026-0142, 5,356 incidents~Outage Center events
- Per-domain blocking detection✓DNS, TLS, HTTP, blockpages per domain~AS-level traffic anomalies
- Free public API✓CC BY 4.0✓Free with API token
- AI/MCP integration✓@voidly/mcp-server, 83 tools✕No MCP server
- ML classification✓GradientBoosting F1 99.8%~Anomaly detection
- BGP / route data✕Out of scope✓Best-in-class
- DDoS / attack telemetry✕Out of scope✓Best-in-class
- Independent of vendor self-reporting✓External probes + 3rd-party feeds✕Cloudflare-network view
- Predictive forecasts✓Sentinel 7-day forecast, AUC 0.98✕Real-time only
We don't color-code "winners." Decide for yourself which tool fits your use case.
What Cloudflare Radar does well
Cloudflare Radar is unmatched on scale. Cloudflare's network sees roughly 20% of internet traffic, which means Radar can show real-time DNS query patterns, BGP route changes, attack traffic, AS-level outages, and HTTP request distribution at a granularity nobody else has. Their internet quality and certificate transparency dashboards are excellent. The team publishes year-in-review reports and Outage Center alerts that have become a primary citation for journalists covering internet shutdowns. The tooling is free, the data updates near-real-time, and the visualizations are best-in-class. For "is the internet up in country X right now," Radar is often the fastest answer.
What Voidly does differently
Cloudflare Radar's strength — its singular vantage point — is also its constraint. It sees what Cloudflare sees: requests to Cloudflare-fronted properties, queries to 1.1.1.1, BGP from their peers. That is enormous, but it is one perspective. Voidly aggregates four independent measurement sources (OONI, CensoredPlanet, IODA, Citizen Lab) plus our own 37+ probe network, specifically to triangulate censorship events from outside any single vendor's view. We focus narrowly on censorship — DNS poisoning, TLS interference, ASN-specific blocking, blockpages — and produce citable incidents with structured evidence (5,356 to date). We also publish the data under CC BY 4.0 and expose it via MCP for AI agents. Radar is broader; Voidly is deeper on this one slice.
When to use which
Specific scenarios. Not all of them point to Voidly — that's on purpose.
- ScenarioConfirming a shutdown is happening right nowRecommendationCloudflare Radar — they see traffic drop in real time. Voidly is 6h-batched for evidence quality.
- ScenarioCiting specific blocked domains in a countryRecommendationVoidly. Radar shows aggregate AS-level traffic; Voidly shows per-domain DNS poisoning, TLS resets, and blockpages with evidence permalinks.
- ScenarioForecasting which countries will have shutdownsRecommendationVoidly Sentinel (7-day forecast, AUC 0.98). Radar is real-time-only.
- ScenarioBGP hijack or DDoS investigationRecommendationCloudflare Radar. Voidly does not cover routing or attack telemetry.
- ScenarioAI agent answering "can my user access X in country Y"RecommendationVoidly /v1/accessibility API or MCP server. Radar does not expose per-domain accessibility queries this way.
- ScenarioCross-validating an outage claimRecommendationUse both. If Radar shows a traffic drop and Voidly shows blockpages on the same date, the evidence triangulates.
Together better
Use both. Radar is the right tool for "what is happening on the internet right now at a global scale." Voidly is the right tool for "what was blocked in country X last Tuesday, and where is the evidence." A serious analyst writing about a shutdown event should check Radar for traffic-level confirmation and Voidly for protocol-level evidence and citable incidents. Cloudflare publishes their own outage reports openly; we link to them when they overlap with our incidents.
Try Voidly free
Read endpoints are free, no key required. CC BY 4.0 licensed. For higher rate limits and ML/forecast endpoints, get an API key.