Cloud Hosting for Small Business: AWS, Azure, and Microsoft 365 Explained

"Move everything to the cloud" is advice Chicago business owners hear constantly — from vendors, from consultants, from articles like this one. But what does it actually mean, what does it cost, and is it right for your business?

The cloud isn't a single thing. Understanding the different types of cloud services — and which ones make sense for a small business — is the first step to making decisions you won't regret.

IaaS, PaaS, and SaaS: The Three Layers of Cloud

Cloud services fall into three broad categories that describe what the vendor manages versus what you manage:

Model	What the Vendor Manages	What You Manage	Examples
IaaS (Infrastructure as a Service)	Hardware, networking, physical datacenter	OS, applications, data, security	AWS EC2, Azure Virtual Machines
PaaS (Platform as a Service)	Hardware, OS, runtime environment	Applications and data	Azure App Service, AWS Elastic Beanstalk
SaaS (Software as a Service)	Everything	Just your data and user configuration	Microsoft 365, Salesforce, QuickBooks Online

For most small businesses, SaaS is the primary entry point into cloud services. You're almost certainly already using SaaS if your team uses Microsoft 365, Google Workspace, Slack, QuickBooks Online, or any other web-based business application.

IaaS becomes relevant when you need a virtual server — either to replace an on-premise server or to host a custom application.

AWS vs. Azure: Which Cloud Platform Is Right for Your Business?

Both Amazon Web Services and Microsoft Azure are world-class cloud platforms. For a Chicago-area small business, the decision usually comes down to one question: What does the rest of your technology stack look like?

Azure Wins for Microsoft-Centric Organizations

If your business already uses Microsoft 365, Active Directory, Windows Server, or any Microsoft-licensed software, Azure is the natural choice:

• Native integration with Microsoft 365, Active Directory, and Entra ID (Azure AD)
• Azure Virtual Desktop: Run Windows desktops in the cloud, accessible from anywhere
• Hybrid licensing benefits: Use existing Windows Server and SQL Server licenses in Azure at reduced cost
• Familiar management tools: The Azure Portal will feel intuitive if you're already in the Microsoft ecosystem
• Microsoft 365 licensing bundles: Business Premium bundles include Azure AD, Intune (MDM), and Defender for Business

For the majority of Chicago small businesses already standardized on Microsoft tools, Azure is the better-integrated, lower-friction choice.

AWS for Custom Applications and Developers

AWS has a larger global footprint and more services than Azure. If your business is building custom web applications, running Linux-based workloads, or if your development team already knows AWS, it can be the right choice. AWS also tends to have a slight price advantage for pure compute workloads.

For most small businesses not running custom applications, the AWS vs. Azure distinction is largely academic — Microsoft 365 is already cloud, and that's where most day-to-day work lives.

Microsoft 365 as Your Cloud Platform

For many Chicago small businesses, Microsoft 365 is the most impactful cloud decision they'll ever make — and many don't even think of it as "cloud" because it's become so normal.

Microsoft 365 Business Premium (approximately $22/user/month) includes:

• Exchange Online: Enterprise email with 50 GB mailboxes and 1 TB archive
• SharePoint Online: Cloud-based file storage and collaboration, replacing on-premise file servers
• Teams: Video conferencing, chat, and team collaboration
• OneDrive: Personal cloud file sync (1 TB per user)
• Microsoft 365 Apps: Word, Excel, PowerPoint, Outlook — always on the latest version
• Intune: Mobile device management for company and personal devices
• Microsoft Defender for Business: Endpoint detection and response (EDR) for all devices
• Azure AD P1: Conditional Access policies, MFA enforcement, single sign-on

That's a substantial security and productivity platform for what amounts to less than a dollar per day per employee.

What to Move to the Cloud vs. Keep On-Premise

Not everything belongs in the cloud. A thoughtful hybrid approach often makes the most sense:

Good candidates for cloud migration:

• Email and calendaring (Microsoft 365 or Google Workspace)
• Office productivity software
• File collaboration and document storage (SharePoint, OneDrive)
• CRM and customer management
• Accounting software (QuickBooks Online, Xero)
• Project management and team collaboration

May be better on-premise or in a hybrid model:

• Line-of-business applications with specific server requirements
• Applications with very high data volumes (CAD files, large databases, video)
• Regulated data with specific geographic storage requirements
• Applications with poor internet performance that need local latency

Questions to ask before migrating anything:

1. What is the application's internet latency sensitivity? (Accounting software works fine; some ERP systems do not)
2. Where is the data going to live — and does that satisfy your compliance requirements?
3. What is the vendor's uptime SLA and backup/recovery policy?
4. What is the ongoing monthly cost vs. the current on-premise cost?

The Hybrid Cloud Reality

Most well-designed small business IT environments in 2025 are hybrid: some workloads in the cloud, some on-premise, with secure connectivity between them. Common hybrid architectures include:

• Microsoft 365 for email and collaboration, with an on-premise server for an industry-specific application
• Azure Virtual Machines for a cloud-hosted server, with local workstations and network equipment
• Cloud backup of on-premise systems (the data lives locally, but the backup copy is offsite in the cloud)

Hybrid cloud isn't a compromise — it's often the optimal design for businesses that have specific applications that run better on local infrastructure.

Busting Cloud Cost Myths

Myth 1: "The cloud is always cheaper." Not necessarily. For workloads that run 24/7, on-premise infrastructure often has a lower total cost of ownership after 3–5 years. Cloud excels at variable workloads and eliminating capital expense.

Myth 2: "Cloud eliminates the need for IT support." Cloud shifts IT support responsibilities rather than eliminating them. Someone still needs to configure security policies, manage user accounts, troubleshoot application issues, and govern data.

Myth 3: "Microsoft backs up my Microsoft 365 data." Microsoft does not back up your Exchange Online email, SharePoint files, or Teams data. Their responsibility ends at platform availability. Third-party backup (Veeam, Barracuda, Datto SaaS Backup) is required.

Migration Tips for Small Businesses

1. Audit before you migrate: Know exactly what data and applications you have before moving anything
2. Migrate in phases: Start with email, then file storage, then more complex workloads
3. Train users before cutover: Adoption failures cause more pain than technical failures
4. Test before going live: Run parallel systems briefly to catch issues before they affect operations
5. Document the new environment: Network diagrams, login credentials, and configuration notes are invaluable

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Need Help? TechniWorx helps Chicago businesses plan and execute cloud migrations — from Microsoft 365 deployment to Azure infrastructure to hybrid cloud design. Schedule a free cloud readiness assessment at techniworx.com.