Oracle Data Safe vs Microsoft Defender for SQL (2026)

Quick verdict

Short answer

This choice is normally made for you by the database engine. If you run Oracle Database, especially in Oracle Cloud where it is included, use Oracle Data Safe for assessment, audit collection, discovery and masking. If you run Azure SQL or SQL Server, use Microsoft Defender for SQL for vulnerability scans and threat alerts, and keep SQL auditing for the evidence trail. Organisations with both engines usually run both services side by side and feed their alerts into one SIEM; the comparison below shows where the two differ so you can fill the gaps.

How we know: This comparison is research-based: coverage, features, retention and charging rules were checked on 7 November 2026 against Oracle Data Safe documentation on docs.oracle.com and Microsoft Learn pages for Defender for Cloud. Oracle's price list could not be read automatically, and Microsoft does not map its Defender for SQL meters to resource types on the pages read, so neither service's per-unit prices are quoted. We have not used either service, so nothing here is a measured result.

Oracle Data Safe is a regional Oracle Cloud Infrastructure service that connects to Oracle databases. Its documentation lists security assessment, user assessment, activity auditing, data discovery, data masking, data subsetting for non-production copies, alerts and management of SQL Firewall, which is built into Oracle AI Database 26ai. Targets include Autonomous AI Databases, OCI database systems, Exadata Cloud@Customer, on-premises Oracle databases, Oracle databases on compute instances in OCI or other clouds, and Amazon RDS for Oracle, connected over TLS or encrypted TCP through private endpoints or an on-premises connector.

Microsoft Defender for SQL is not a separate product but two plans inside the Defender for Databases plan of Microsoft Defender for Cloud. Defender for Azure SQL Databases protects Azure SQL single databases and elastic pools, Azure SQL Managed Instance and Synapse dedicated SQL pools; Defender for SQL Servers on Machines protects SQL Server 2012 to 2022 on Azure VMs and SQL Server enabled by Azure Arc, which is how on-premises, AWS and Google Cloud machines are covered. Each plan combines vulnerability assessment with Advanced Threat Protection alerts.

Side by side

Aspect	Oracle Data Safe	Microsoft Defender for SQL
Engines covered	Oracle Database only	Azure SQL Database, SQL Managed Instance, Synapse dedicated SQL pools, SQL Server 2012 to 2022
Where targets can run	OCI, Cloud@Customer, on premises, compute instances in other clouds, Amazon RDS for Oracle	Azure, plus on premises, AWS and Google Cloud through Azure Arc
Configuration assessment	Security assessment against STIG, CIS benchmarks, GDPR recommendations and Oracle practice	Vulnerability assessment scans with baselines and remediation steps
User and privilege review	User assessment of highly privileged and risky accounts	Permission findings within vulnerability assessment
Threat detection	Alerts from audit events and alert policies	Advanced Threat Protection: potential SQL injection, anomalous access and query patterns, brute force, suspicious activity
Audit trail	Collects and retains audit records: 12 months online plus up to 6 years archive	Not a full audit trail; use SQL Server Audit or Azure SQL auditing
Discovery and masking	Sensitive data discovery, masking and subsetting for non-production copies	Not part of the plan (Azure SQL has separate dynamic data masking)
Blocking	SQL Firewall allow lists (Oracle AI Database 26ai), managed centrally	No: alerts with mitigation guidance only
How it is enabled	Register each target database with the service	Enable per subscription; all supported resources, including new ones, are protected
Charging	Included with Oracle cloud databases; 1 million audit records per target per month free; on-premises targets billed (waived to 28 February 2027)	Azure consumption billing via Defender for Cloud after a 30-day trial; DWU model in preview

Key differences

Scope: security toolkit versus threat detection plan

Data Safe is a broad toolkit for Oracle databases. Besides assessment and alerts it collects audit records centrally, manages audit policies, discovers sensitive columns, masks and subsets data for test copies, and manages SQL Firewall allow lists on Oracle AI Database 26ai. For an Oracle team it can replace several separate tools, although an on-premises network firewall or multi-engine monitoring still needs another product.

Defender for SQL is narrower by design. It tells you what is misconfigured (vulnerability assessment) and raises alerts when activity looks like an attack (Advanced Threat Protection), with links to Microsoft Sentinel for investigation. It does not keep an audit trail, does not mask data and does not block queries, so most Azure estates pair it with Azure SQL auditing or SQL Server Audit and with other controls for masking and access.

Reaching databases outside the home cloud

Both services reach beyond their own cloud, by different routes. Data Safe connects directly to Oracle databases on premises or on compute instances in any cloud through private endpoints or an on-premises connector, and it supports Amazon RDS for Oracle.

Defender for SQL covers SQL Server outside Azure through Azure Arc: the machine must be onboarded to Arc and registered as an Arc-enabled SQL Server, and the Defender for SQL extension then collects data through Extended Events from SQL Server 2017 onward and SQL Server audit logs on earlier versions, on Windows Server 2012 R2 or later. Microsoft notes the extension needs sysadmin rights for the SQL service account. AWS and Google Cloud accounts can also be connected to Defender for Cloud.

Audit retention and evidence

If an auditor asks for a year of database activity, Data Safe can answer from its own store: audit records are kept online for up to 12 months and can be archived for six more years, seven in total, and archived data can be retrieved up to six times per month per target. Paid audit collection beyond the free allowance is enabled by default and can be switched off per target, which stops collection until the next month.

Defender for SQL is not designed as evidence storage. For SQL Server and Azure SQL, the audit trail comes from SQL Server Audit or Azure SQL auditing, written to a destination you configure; Defender's alerts sit on top. Budget for that storage and retention separately when comparing costs.

Billing models

Data Safe is included at no additional cost with Oracle cloud databases; Oracle's Autonomous AI Database documentation says it is included for all workloads. Every target gets the first 1 million audit records collected per month free, with overage at Oracle Cloud price list rates. On-premises databases, databases on compute instances and Amazon RDS for Oracle are normally billed per registered target, but Oracle is waiving those charges from 12 June 2026 to 28 February 2027 (audit overage still applies).

Defender for SQL is billed through Microsoft Defender for Cloud, which is free for the first 30 days. Microsoft's FAQ says SQL Servers on Machines is billed per protected server, not per database. A preview billing model in the Defender portal replaces these plans with Defender Workload Units (DWUs) and one consolidated Defender for Databases plan, so cost models may change.

Pricing and licensing

Oracle Data Safe. Included with Oracle cloud databases at no additional cost; 1 million audit records per target per month free, with paid overage (on by default, switchable per target). On-premises, compute-instance and Amazon RDS for Oracle targets are normally billed per target, with charges waived from 12 June 2026 to 28 February 2027. Per-target and overage prices are on the oracle.com price list, which could not be read automatically, so they are not quoted. A 30-day free trial is available.

Microsoft Defender for SQL. Azure consumption billing through Defender for Cloud after a 30-day free trial; SQL Servers on Machines is billed per server, not per database. No price is quoted here: the public pricing page renders its figures only in the browser, and Microsoft's machine-readable price list shows several Defender for SQL meters (per instance-hour, per vCore-hour and per node-month) without stating which applies to which resource type. Use the Defender for Cloud pricing page or the Azure pricing calculator for your resources, and note the preview DWU model.

Pricing checked on the vendors' official pages on 7 November 2026. Prices change; confirm before buying.

Where each one leads

Oracle Data Safe strengths

Assessment, user review, audit collection, discovery, masking and subsetting in one managed console
No additional cost for Oracle cloud databases, apart from audit overage
Long audit retention: 12 months online plus up to 6 years archive
Manages SQL Firewall allow lists on Oracle AI Database 26ai
Reaches on-premises, other-cloud and Amazon RDS for Oracle databases without host agents

Microsoft Defender for SQL strengths

Enabled per subscription, automatically covering new resources
Threat alerts for SQL injection, brute force and anomalous access with Sentinel investigation
Covers Azure SQL, Managed Instance, Synapse and SQL Server 2012 to 2022
Extends to on-premises, AWS and Google Cloud SQL Server through Azure Arc
No appliances or separate consoles beyond Defender for Cloud

Limitations

Oracle Data Safe limitations

Oracle Database only
Per-target and overage prices sit on the Oracle price list, not in the documentation
If paid audit usage is switched off, collection stops once the free monthly limit is reached
SQL Firewall management applies to Oracle AI Database 26ai

Microsoft Defender for SQL limitations

Microsoft SQL only within these plans
No audit trail, masking or blocking; other tools are still needed
Machines outside Azure must be onboarded to Azure Arc, with sysadmin rights for the extension
Billing is moving to Defender Workload Units (preview) and meters are hard to map to resources

When to choose each

Choose Oracle Data Safe if

Your databases are Oracle, in OCI or elsewhere
You want audit records collected and retained by the service for compliance evidence
You need discovery and masking before copying production data to test
You are rolling out SQL Firewall on Oracle AI Database 26ai

Choose Microsoft Defender for SQL if

Your databases are Azure SQL or SQL Server
You want threat alerts and vulnerability scans with minimal setup across a subscription
You already use Defender for Cloud and Microsoft Sentinel
You want the same protection on on-premises SQL Server through Azure Arc

When neither is right

You need one tool for many engines (Oracle, SQL Server, PostgreSQL and more): see IBM Guardium vs Imperva or DataSunrise.
You need a network SQL firewall in front of on-premises Oracle databases: see DataSunrise vs Oracle Audit Vault.
Your databases are on AWS RDS or Aurora: see AWS Database Activity Streams.
You need SQL Server permission and configuration auditing outside Azure without Arc: see Idera SQL Secure.

Final recommendation

Bottom line

Pick by engine first: Oracle Data Safe for Oracle Database, Microsoft Defender for SQL for Azure SQL and SQL Server. Beyond that, know what each leaves out. Data Safe gives Oracle teams a wide managed toolkit, including audit retention and masking, but nothing for other engines. Defender for SQL gives Azure teams low-effort scanning and threat alerts, but you still need SQL auditing for evidence and other tools for masking and blocking. In a mixed estate, run both and send their alerts to the same SIEM.

Frequently asked questions

Can Oracle Data Safe protect SQL Server?

No. Data Safe connects to Oracle databases only: Autonomous AI Databases, OCI database systems, Cloud@Customer, on-premises Oracle databases, Oracle databases on compute instances and Amazon RDS for Oracle.

Can Defender for SQL protect Oracle?

No. Defender for SQL covers Azure SQL Database, SQL Managed Instance, Synapse dedicated SQL pools and SQL Server. Defender for Cloud has a separate plan for open-source relational databases; no Oracle Database plan was found on the pages checked.

Is Oracle Data Safe free?

For Oracle cloud databases it is included at no additional cost, and each target gets 1 million audit records per month free. On-premises and compute-instance targets are normally billed per target, with charges waived from 12 June 2026 to 28 February 2027, and audit overage is charged at price list rates.

Does Defender for SQL replace SQL Server auditing?

No. It raises threat alerts and runs vulnerability assessments, but it is not a full audit trail. Keep SQL Server Audit or Azure SQL auditing for compliance evidence.

Which one can block queries?

Data Safe manages SQL Firewall allow lists, which the Oracle AI Database 26ai kernel enforces. Defender for SQL does not block; it raises alerts with mitigation guidance.

Sources

Checked November 2026.

How we research comparisons: our editorial method.