"3 free trials. No card required.
Sign in to access your fidelity score."
// gdpr-native · no data stored without consent
sign-in scoped to email only · echoverse.dev privacy policy applies
// powered by stripe · pci-dss compliant · cancel anytime
3 free runs before subscribing · no card required for trials
"The alert left. It never landed. Nobody knew until the damage was done. Sparrow changes that — permanently."
Logic compiled to native binary. No interpreted overhead. Deterministic output guaranteed.
Edge-deployed. Executes at Cloudflare PoP nearest to your fleet. OS-layer unreachable.
Self-rescheduling per-device alarm. Federated. Fires independently of your entire stack.
Runtime fidelity methodology and edge watchdog architecture patent-pending.
Between your sensor and your technician's phone sits a gap that no dashboard shows you. Sparrow watches that gap. Not the data. Not the sensor. The pipe. The moment it falters — before it fails — you know.
// heartbeat_ingest · fidelity_score · durable_watchdog
edge-resident · serverless · gdpr-native · no pii at rest
rust core · wasm boundary · hmac-signed · federated
90s degraded threshold · 180s critical escalation · 24h kv ttl
Not a log. Not a dashboard alert. A single number — your fleet's fidelity percentage — that tells you whether your alert infrastructure is operationally sound. Court-admissible. Audit-ready. Real.
// rolling 1-hour fidelity window · consecutive miss detection
deterministic rust scoring · same input always same output
org-wide fleet view · per-device independence · wasm-compiled
fully reproducible · no inference · no probabilistic ambiguity
No servers. No agents. No SDK to install. No on-call for the watchdog layer. Sparrow runs above the device. What sits beneath it cannot reach it. It was designed that way. Intentionally. Permanently.
// cloudflare edge · durable objects · self-rescheduling alarm
federated execution · no shared state · no central failure point
serverless · zero infrastructure tax · zero maintenance burden
os-layer unreachable · oem kill policies cannot touch this layer
That question should never keep you up. Sparrow answers it — continuously, quietly, without asking anything of you.
One missed alert. One rejected shipment. Sparrow closes that gap.
Compliance requires proof of delivery. Not just proof of sending.
Engineers on weak signals. Dispatch alerts that must arrive.
If silence is expensive, Sparrow is cheap insurance.
"Your fleet's fidelity score. Updated continuously. No interpretation required."
"Start standalone. Bundle when you're ready. Cancel anytime."
Works with any fleet. Any alert system. Any industry. No dependencies. Plug in your devices, configure your endpoint, get your fidelity score.
Badger proves the data is real. Sparrow proves the alert arrived. End to end. Nothing escapes. The complete cold chain intelligence stack.
3 free runs. No card required. 60 seconds to your fidelity score.
sparrow-wfi.houseofsolace.workers.dev · engine wfi · v1.0.0
rust · wasm · cloudflare edge · durable objects · kv · gdpr-native · federated · deterministic · serverless
sunset boulevard collective · echoverse.dev · pairs with badger · orchestrated by canalflow