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STACKIT SQL Server Flex

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STACKIT SQL Server Flex delivers managed Microsoft SQL Server instances backed by enterprise AlwaysOn availability clusters.

Service Overview

Section titled “Service Overview”
  • Mission-Critical Performance: Enterprise-grade high availability using SQL AlwaysOn 3-node clusters.
  • Reduced DBA Overhead: Automated maintenance, patching routines, and automated snapshot backups.
  • Compliant Platform: Operated in BSI C5 certified German data centers with pay-per-use licensing.

Technical Details

Section titled “Technical Details”
  • Administrative Tooling: Native support for SQL Server Management Studio (SSMS), SQL Agent Jobs, and custom server roles.
  • Backup Options: Automated PITR backups alongside manual copy-only backups to S3 object storage.

Plans

Section titled “Plans”

The values below come from the STACKIT documentation and update themselves.

From the STACKIT docsPlans and performance classes of SQLServer Flex › PlansSource updated 19.11.2025 · copied 05.10.2026

Currently we offer four different plans.

By selecting the plan, you specify the hardware specifications of the SQLServer Flex instance. The available plans depend on the instance type. You can further filter the options by defining the required amount of CPUs and RAM.

If your performance class is too small you are able to upgrade it to a bigger one.

To upgrade it please open a service request at the STACKIT Help Center.

Swipe sideways to see the whole table
Service PlanCPURAMSystem Disk SizePlan IDSQL Server EditionHigh Availability
SQLServer-Flex-4.16-Single-Standard-EU01 ( 4 vCPU 16 GB RAM )416 GB20 GB4.16-SingleSQL Server StandardNone
SQLServer-Flex-4.32-Replica-Enterprise-EU01 ( 4 vCPU 32 GB RAM )432 GB20 GB4.32-ReplicaSQL Server Enterprise3 Way AlwaysOn Availability Group
SQLServer-Flex-8.64-Replica-Enterprise-EU01 ( 8 vCPU 64 GB RAM )864 GB20 GB8.64-ReplicaSQL Server Enterprise3 Way AlwaysOn Availability Group
SQLServer-Flex-16.128-Replica-Enterprise-EU01 ( 16 vCPU 128 GB RAM )16128 GB20 GB16.128-ReplicaSQL Server Enterprise3 Way AlwaysOn Availability Group
The selected size is used 75% for storing data and 25% for storing logs.
What is this?

This section is copied from the STACKIT docs automatically, several times a day. It cannot be changed here. Changes belong in the STACKIT docs.

Limitations & Constraints

Section titled “Limitations & Constraints”
  • No Storage Shrinking: Storage size reductions are blocked.
  • No Manual Storage Class Changes: Storage performance tiers are permanently set at initial instance creation.
  • No Automated S3 Immutable Archiving: Offloading backups to ransomware-protected immutable S3 buckets must be run manually.
STACKIT documentation docs.stackit.cloud STACKIT SQL Server Flex Documentation Open the documentation
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Maintainers
  • ?Name not public?Name not publicThe Cloud Framework team knows who this is. The name is not shown on the site.
TMTobias M.Head of STACKIT Cloud Framework · STACKITOwnerActive 12 of the last 12 weeks · 168 updatesSTACKITwww.linkedin.com/in/tobias-müller-011304172??Name not publicThe Cloud Framework team knows who this is. The name is not shown on the site.Contributed in STACKIT

  • Tobias M.Tobias M.Head of STACKIT Cloud Framework · STACKITOwnerActive 12 of the last 12 weeks · 168 updatesSTACKITwww.linkedin.com/in/tobias-müller-011304172 · Oct 5, 2026

  • Name not public?Name not publicThe Cloud Framework team knows who this is. The name is not shown on the site. · Sep 9, 2026