Cloud Monitoring

Cost Anomaly Detection

TENET watches Azure Cost Management data for sustained increases in daily spend and entirely new sources of spend, using the read-only subscription access already connected to the platform.

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Cost anomaly feedAzure Cost Management
Signals
2
Data source
Azure
Access
Read-only
Compute
Daily spend above normal weekly pattern
High
New spend source
Not present in the prior month
Medium
Storage
Within normal weekly pattern
Low
Spending trend · last 30 daysServiceSubscription
Virtual Machines
€4,210
Azure SQL Database
€2,380
Azure Kubernetes Service
€1,640
Storage
€720
Newest three days held back until Azure cost data settles · Illustrative data
Spending Trend

See where spend is going

View the last 30 days of settled Azure spend by service or by subscription, and see the largest spend lines from the angle that suits the conversation. Each line keeps its own currency, so amounts are never mixed across currencies.

Cost Findings

Focus on changes that persist

TENET compares daily spend with the normal weekly pattern and highlights only sustained increases that are both materially larger and unusually high for the same day of the week. A material new source of spend is called out once it has persisted for at least two settled days. One-off single-day changes are not surfaced as trends.

Cost findings
Severity
High 1Medium 2Low 1
Virtual Machines · prod subscription
Sustained increase above the usual weekday spend
High
Azure AI Search · test subscription
New source of spend, two settled days
Medium
Storage · prod subscription
Sustained increase above the usual weekday spend
Low
Finding: Virtual Machines · prod subscriptionHIGH
AI summary: Virtual Machines spend in the prod subscription has stayed above its usual weekday level. Two resources account for most of the change; check whether they were resized recently.
EvidenceSustained across settled daysMoved mostvm-api-prod-02, vm-api-prod-03
Ask Brite
Add to Remediation
Dismiss · 7d resurface
Triage & Remediation

Investigate and act in one workflow

Expand a finding to see the evidence. Where there is enough evidence, an AI summary frames the likely optimisation conversation and the next check, and points to the resources whose spend moved the most when Azure reports cost per resource. Use Ask Brite or Add to Remediation to move it forward, or dismiss a finding that is expected. It resurfaces if the change recurs after seven days.

Alerts

Cost alerts where your team works

Send Azure cost anomaly alerts to a Microsoft Teams channel. Set it up once for your account and it covers every tenant you manage, with cost alerts turned on or off independently of other alert categories.

Microsoft Teams: #cloud-costs
Cost anomaly: Virtual MachinesHigh
Sustained increase above the usual weekday spend in the prod subscription.
Illustrative alert
Azure-native data

Built on your billing data

Cost anomalies are calculated from Azure Cost Management data - the same billing information available in the Azure portal. TENET uses the read-only subscription access granted when the subscription is connected.

No extra setup or permissions required
Cost data flow
Azure Cost Management
Settled Azure billing information
TENET analysis
Weekly pattern and prior-month comparison
Actionable signal
Persistent changes surfaced for review

FAQs

Why does TENET leave out the most recent days of spend?
Azure takes a few days to finalise cost data. TENET leaves out the newest three days until the data has settled, so incomplete charges never look like a false drop in spending.
Will a one-off spike create a cost finding?
No. Single-day changes are not surfaced as trends. TENET highlights sustained increases that are both materially larger and unusually high for the same day of the week, and calls out a material new spend source once it has persisted for at least two settled days.
Does cost anomaly detection need extra setup or permissions?
No. Cost anomalies are calculated from Azure Cost Management data using the read-only subscription access granted when the subscription is connected. There is nothing extra to set up for an already connected Microsoft tenant.
Does the AI summary tell me what caused the increase?
It frames the likely optimisation conversation and the next check from the settled spending data and, where Azure reports cost per resource, points to the resources whose spend moved the most. It does not replace your own cost analysis or claim a cause the data cannot show.

See meaningful Azure cost changes sooner

Connect a subscription with TENET's existing read-only access and monitor sustained spend increases and new cost sources.

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