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Uptime.
Updated 24h ago

AWS vs Microsoft Azure SLA

Promised uptime per service, credits, support and what the status pages showed, side by side.
Change vendors (up to four; 2 picked)

Promise vs reality

Promised in the SLAObserved on the vendor's status pagePartial historyShortfall

Best SLA by category

CategoryAWSMicrosoft Azure
Compute99.99%Amazon EC299.99%Azure Virtual Machines
AI models99.9%Amazon Bedrock99.9%Azure OpenAI in Foundry Models
Databases99.999%Amazon DynamoDB99.995%Azure SQL Database
Storage99.9%Amazon S3 (Standard)99.99%Azure Blob Storage (Storage Accounts)

Support: fastest first response

  • AWS Business Support+30 minBusiness-critical system down: < 30 mins · Production system down: < 1 hour · Production system impaired: < 4 hours · System impaired: < 12 hours · General guidance: < 24 hours
  • AWS Enterprise Support15 minBusiness/mission-critical system down: < 15 mins · Production system down: < 1 hour · Production system impaired: < 4 hours · System impaired: < 12 hours · General guidance: < 24 hours
  • AWS Unified Operations5 minMission-critical system down: < 5 mins from Incident Management Engineer · Production system down: < 1 hour · Production system impaired: < 4 hours · System impaired: < 12 hours · General guidance: < 24 hours
  • AWS Developer (legacy, closed to new subscriptions)n/aNo published response targets.
  • AWS Business (legacy, closed to new subscriptions)1 hCritical issues: 1 hour
  • AWS Enterprise On-Ramp (legacy, being deprecated)30 minCritical issues: 30 minutes
  • Microsoft Azure Basicn/aNo published response targets.
  • Microsoft Azure Developern/aMinimal business impact (Sev C): Within eight business hours
  • Microsoft Azure Standard1 hCritical business impact (Sev A): Within one hour · Moderate business impact (Sev B): Within four hours · Minimal business impact (Sev C): Within eight business hours
  • Microsoft Azure Professional Direct1 hCritical business impact (Sev A): Within one hour · Moderate business impact (Sev B): Within two hours · Minimal business impact (Sev C): Within four business hours
  • Microsoft Azure Unified Enterprise15 minCritical business system down (Sev 1): Within 15 mins for Azure, one hour for all other products · Critical business impact (Sev A): Within one hour · Moderate business impact (Sev B): Within two hours · Minimal business impact (Sev C): Within four business hours

Popular comparisons

Sources: each vendor's own SLA page (re-read monthly) and status page feed (read every Friday). A summary, not the contract: the contract you sign governs. Logos via logo.dev; trademarks belong to their owners.

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