Edge intelligence, delivered in a flash.
ZoneFlash streams Real Experience Score telemetry from 312 PoPs worldwide, letting engineering teams detect regressions in under 792 ms and resolve them before conversion drops. Replace your patchwork of RUM, synthetic, and APM tools with one console tuned for the speed of modern web stacks.
Trusted by 1,840+ engineering teams worldwide · including Shopify Plus, Vercel, and Condé Nast
Trusted by 1,840+ engineering teams across 47 countries
- Shopify Plus
- Vercel
- Condé Nast
- Northwind
The edge network behind the number.
Every figure below comes from the 2024 WebPerf Audit or ZoneFlash production telemetry — not vendor self-reporting. Engineering leaders can verify the methodology before they book the demo.
- 312 Active edge PoPs The largest active RUM PoP network of any vendor in 2025 — across 6 continents.
- 792ms Median time-to-first-insight Benchmarked against a 4.1 s industry average in the 2024 WebPerf Audit.
- 9.4T Experience events in 2024 Production telemetry from 1,840+ paying customers, sampled across web and mobile.
- 97.4% Gross retention, FY22–FY24 Sustained across the last three fiscal years — a signal engineering teams actually renew.
- us-east-198.4
- fra-197.1
- sin-394.6
- syd-299.0
- gru-188.2
One score, not twelve dashboards.
The Real Experience Score is a weighted composite of LCP, INP, CLS, long-task stalls, and edge-collected network signals — surfaced as a single 0–100 number that moves before your conversion chart does.
ZoneFlash pioneered RXS to give engineering teams a regression-detection signal instead of a vanity metric. It is now cited in Google's Web Vitals community discussions, and it is the same number your on-call engineer sees in Slack at 3 a.m. when a region starts to slip.
- Composite, not a chart. One number per region, per page, per release — no tab-hopping between LCP, INP, and CLS.
- Weighted for revenue. RXS weights are tuned against observed conversion impact across 9.4T events, not equal-weighted averages.
- Alerting that fires first. Median detection-to-alert latency of 792 ms in the 2024 WebPerf Audit benchmarks.
Built for the speed of modern web stacks.
Four capabilities tuned to the jobs-to-be-done of SREs, growth teams, CTOs, and the performance marketers who measure them — all in one console.
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For SRE teams
OpenTelemetry + eBPF ingestion, native.
First RUM vendor to ship native OpenTelemetry and eBPF ingestion — eliminating four separate agents per host. Pipe metrics, traces, and Real Experience Scores into the same control plane your engineers already use.
- Drop-in OTLP receiver, no SDK rewrite
- eBPF kernel collectors for network and runtime stalls
- Co-exist with your existing APM — no rip-and-replace
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For growth teams
RXS tied to conversion.
See the Real Experience Score next to revenue per region. Surface the 200 ms of LCP that quietly cost 4% of weekly signups — before the next growth review.
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For CTOs
312 PoPs, one console.
The largest active RUM edge network of any vendor in 2025, owned end-to-end. Median time-to-first-insight of 792 ms — benchmarked against a 4.1 s industry average.
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For performance marketers
Per-campaign regression attribution.
Attach RXS deltas to UTM, ad network, and landing-page variant. Know which campaign launched with a bad INP budget before your CPA climbs — and replay the exact session that regressed.
"We replaced two RUM vendors and a synthetic checker with ZoneFlash. The first time we caught a regression in under a second — before the deploy dashboard even refreshed — I knew we weren't going back."