Data Retention

Sentro automatically manages the lifecycle of your monitoring data based on your plan's retention window.

Retention periods

Plan	Retention	What it means
Free	7 days	Check history, daily stats, and logs older than 7 days are deleted
Starter	30 days	Data retained for 30 days
Pro	90 days	Data retained for 90 days
Max	365 days	Data retained for 1 year

What data is subject to retention

The following data types are cleaned up based on your plan's retention window:

Data type	Description
Check results	Individual HTTP/TCP/DNS/ICMP check results (status, latency, errors)
Daily statistics	Aggregated daily uptime and latency statistics per monitor
Heartbeat pings	Incoming heartbeat/cron job pings
Alert history	Records of dispatched alert notifications
Webhook deliveries	Outgoing webhook delivery logs
API request logs	Logs of API key usage

Data NOT subject to retention

The following data is retained for the lifetime of your account:

• Incidents — Outage records and incident updates (for historical reference)
• Monitor configuration — Your monitors, alert rules, channels, and settings
• Audit logs — User activity logs (for security compliance)
• Billing history — Invoices and payment records

Cleanup schedule

Data retention cleanup runs daily at 3:00 AM UTC. The process:

1. 1:00 AM UTC — Retention warning notifications are sent (if applicable)
2. 2:00 AM UTC — Daily statistics are aggregated from raw check data
3. 3:00 AM UTC — Data older than the retention window is permanently deleted

After cleanup, a summary email is sent to opted-in recipients listing what was removed.

Notifications

Before deletion

Sentro sends advance warning emails at 30, 14, 7, 3, and 1 day(s) before your oldest data reaches the retention cutoff. These emails include:

• How many days until deletion
• The date of your oldest data
• Approximate number of records affected
• A link to upgrade your plan for longer retention
• A link to export your data before it's deleted

After deletion

A daily cleanup summary email is sent after the retention job runs, listing the number of records removed per category.

Managing notifications

You can configure who receives retention notifications from Settings → Notifications in the dashboard. Each recipient can opt into or out of Data Retention notifications independently.

Every retention email includes a one-click Unsubscribe link.

Data export

Before data is deleted, you can export it:

• Dashboard — Go to any monitor's detail page and click Export CSV to download check history
• Full export — Go to Settings → Danger Zone → Export Data for a complete JSON export
• API — Use POST /v1/export to request an asynchronous export delivered to your email

The dashboard CSV export supports up to 365 days of history (limited by your plan's retention).

Plan changes and retention

Upgrading

When you upgrade to a plan with longer retention, your existing data is preserved — the new retention window applies immediately.

Downgrading

When you downgrade to a plan with shorter retention:

• You receive a warning email about the reduced retention window
• Data older than the new retention limit will be deleted in the next daily cleanup cycle
• We recommend exporting your data before downgrading

Self-hosted retention

Self-hosted editions have the following retention limits:

Edition	Retention
Community	90 days
Team	365 days
Max	730 days (2 years)
Enterprise	730 days (2 years)

Self-hosted users can configure a custom retention period up to their edition's maximum by setting DATA_RETENTION_DAYS in the environment.