Our business is migrating from on-premises infrastructure. Given our deep dependencies on Microsoft Active Directory, SQL Server, and .NET applications, which cloud platform do you prefer: AWS, Azure, or GCP? We need optimal scalability but want to leverage existing licensing costs effectively while ensuring reliable performance.
3 answers
For an infrastructure highly dependent on Microsoft technologies, Azure is often the most cost-effective and seamless path. Through the Azure Hybrid Benefit, you can repurpose your existing on-premises Windows Server and SQL Server licenses with Software Assurance, which slashes virtual machine operational costs drastically compared to deploying those same workloads on AWS or GCP. Furthermore, Azure provides native, out-of-the-box integration with Active Directory through Microsoft Entra ID. While AWS offers robust managed Active Directory services and handles Windows workloads exceptionally well at scale, it cannot match the immediate ecosystem alignment and licensing discounts that Microsoft directly provides to its enterprise software customers.
While the licensing discount on Azure sounds great, how does its uptime and global infrastructure reliability compare to AWS for high-availability legacy applications? I have read several engineering blogs detailing unexpected VM availability issues in specific Azure regions compared to AWS EC2 stability.
If your data strategy involves massive machine learning or real-time big data analytics pipelines in the future, you should look closely at GCP's BigQuery ecosystem rather than just sticking to AWS or Azure.
I completely agree with Melissa on this point. While Azure is ideal for immediate operational migration of SQL databases, GCP offers an unmatched developer experience and faster processing power for analytical frameworks. If your long-term roadmap shifts from pure infrastructure hosting to data science, a multi-cloud approach using Azure for identity management and GCP for data pipelines provides the best architecture.
Austin, while it is true that AWS historically holds a reputation for unmatched infrastructure maturity and isolated availability zones, Azure has closed that gap significantly with its robust Availability Zones design architecture. For mission-critical legacy applications, if you architect your deployment across multiple regions and use Azure Site Recovery along with load balancers, you can easily achieve a 99.99% uptime SLA. The real-world difference in stability is minimal now, meaning the massive cost savings from your existing Microsoft enterprise agreements almost always outweigh the fractional difference in pure platform maturity.