KESTREL
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THE INSTRUMENT
One pane. Every signal.
Traces, logs, metrics, and SLOs — fused into a single queryable surface. Every diagram below is drawn in code, replaying one real incident from our own workspace: 2026-06-11, checkout-api.
Trace Explorer
Every request is a story with forty narrators. Kestrel lines them up: a waterfall of spans with inline logs, payload sizes, retry markers, and the exact line of code that burned 300ms. Queries prune by service, time window, and tag before touching disk — which is why searching a month of traces feels like grepping a local file.
- FULL-FIDELITY, NO SAMPLING ON ERRORS
- 30-DAY HOT RETENTION
- COLUMNAR STORE, INDEXED ON ARRIVAL
Live Service Map
Your topology, discovered — not drawn. Nodes size by throughput, edges thicken with traffic, and trouble literally glows. Watch a deploy propagate left to right across your stack in real time.
- AUTO-DISCOVERED FROM SPANS
- DEPLOY MARKERS INLINE
- BLAST-RADIUS PREVIEW
Anomaly Engine
Thresholds age like milk. Kestrel baselines every series — seasonality, deploys, traffic shape — and pages only when reality leaves the envelope. When it fires, it arrives with the receipts: the trace, the diff, the suspect deploy.
- SEASONAL BASELINES PER SERIES
- ROOT-CAUSE GROUPING
- 5M + 1H BURN WINDOWS — BOTH MUST BREACH
Log Fusion
Logs aren't a separate product — they're the footnotes of your traces. Every log line lands pre-joined to its span. Click a spike, read the exact stderr that caused it. No copy-pasting request IDs between tabs, ever again.
- SPAN-JOINED AT INGEST
- STRUCTURED + RAW
- GREP THAT FEELS LOCAL
SLO Studio
Reliability is a budget. Spend it on shipping. Define an SLO in one sentence — 99.9% of checkouts under 800ms — and Kestrel compiles it into burn-rate alerts, a forecast, and a monthly report your VP actually reads.
- ONE-SENTENCE DEFINITIONS
- MULTI-WINDOW BURN ALERTS
- EXEC-READY REPORTS
budget exhausts: never, at current burn
Speaks everything you run.
OTLP-NATIVE. IF IT EMITS A SPAN, KESTREL DRINKS IT.
Your stack has something to tell you.
NO CARD · 1M SPANS/MO · FIVE-MINUTE SETUP