SharePoint Online vs On-Premise: Which Platform Wins?

With SharePoint Server 2016 and 2019 both heading towards their support deadlines, firms are facing a pretty big decision about their collaboration platforms. The choice between SharePoint Online and on-premise deployments affects everything from infrastructure costs to how teams actually gets work done.

In this article, we’ll look at both deployment options, comparing their features, costs, security capabilities, and ideal use cases. We’ll also clear up the differences between SharePoint on Azure and SharePoint Online, and when Azure Files might come into play.

Remote and hybrid working have driven demand for cloud-based collaboration tools, with SharePoint Online now processing billions of requests daily. Microsoft’s direction is clear: cloud-first, with on-prem as the exception rather than the rule.

And this is backed up by the decisions they’ve made about the support lifecycle. SharePoint Server 2016 and 2019 both reach end of support in July 2026. After this date, only SharePoint Server Subscription Edition will get updates for on-premise deployments. And some might argue the pace of innovation in SharePoint Online far outstrips what’s possible with traditional release cycles, leaving the on-prem versions feeling increasingly dated.

Here’s how the two main options compare.

SharePoint on-premise is the traditional deployment model where you install and run SharePoint Server on your own infrastructure.

Whether that’s physical servers in your data centre or virtual machines in your private cloud, you maintain complete control over every aspect of the platform.

This approach gives you full ownership of your collaboration environment. You decide when to apply updates, how to configure security, where data resides, and how the platform integrates with your other systems. SharePoint on-premise supports extensive customisation through farm solutions, allowing you to modify almost any aspect of the platform’s behaviour.

The infrastructure requirements are quite hefty. You need database servers running SQL Server, web front-end servers, application servers, and potentially separate servers for search and other service applications. Add in load balancers, backup systems, and disaster recovery infrastructure, and you’re looking at a serious technical footprint.

For companies that’ve invested heavily in SharePoint over the years, on-premise deployments often involve extensive customisations or third-party solutions. They might have built complex workflows with SharePoint Designer or written custom code. These investments can be both an asset and a challenge when you want to modernise.

SharePoint Online is a fundamentally different way of doing things. Rather than infrastructure you manage, it’s a service Microsoft provides as part of the Microsoft 365 ecosystem. You make use of SharePoint capabilities without worrying about servers, databases, or patches.

Built from the ground up for the cloud, SharePoint Online gives you modern collaboration experiences with continuous updates. New features roll out regularly without needing major upgrade projects or downtime. The modern SharePoint experience includes responsive designs and mobile apps, alongside integration with Microsoft Teams, OneDrive, and the entire Microsoft 365 suite.

The platform handles massive scale automatically. Whether you have ten users or ten thousand, SharePoint Online adjusts resources as needed. Global content delivery networks make sure you get good performance regardless of user location, while Microsoft handles all the complex infrastructure management that would otherwise fall on your IT department.

Deployment and infrastructure

SharePoint on-premise means you’re in charge of everything. You need servers, databases, load balancers, and all the kit that goes with enterprise infrastructure. It’s a lot to manage, but you get complete control over your environment. Want to tweak something specific? You can. Or if you need to keep everything in your own data centre, that’s fine too. The flip side is that your IT team carries the full burden of keeping it all running smoothly.

SharePoint Online gets rid of all that infrastructure headache. Microsoft handles the servers, patches, backups, and scaling. You can spin up new sites in minutes rather than weeks, and there’s no hardware to worry about when things grow. Your IT team focuses on the actual collaboration bit rather than keeping servers happy.

It can be liberating if you’re comfortable letting Microsoft handle the plumbing, but some organisations prefer keeping that control in-house.

Cost considerations for SharePoint

SharePoint on-premise hits you with big upfront costs. You’re buying server licenses, Client Access Licences (CALs), SQL Server licenses, plus all the hardware to run it on. Then there’s the ongoing stuff: maintenance contracts, electricity bills, cooling systems, and the IT staff time to keep everything ticking over. Don’t forget hardware refreshes every few years, which can sting. The total cost often surprises organisations who only budgeted for the obvious licensing fees.

SharePoint Online keeps things simple with monthly per-user pricing, usually bundled into Microsoft 365 subscriptions. You get all the infrastructure, updates, and disaster recovery thrown in. While the monthly costs might look steep compared to spreading out on-premise licenses over several years, there are no hidden infrastructure surprises. Storage comes with generous quotas (typically 1TB plus 10GB per licensed user), though you’ll pay extra if you need massive amounts. Most organisations find the predictable monthly costs easier to manage than the capital expenditure rollercoaster of on-prem deployments.

Features and functionality

The features you get with SharePoint on-premise depend on which version you’re running. SharePoint Server 2019 (the last traditional version) is missing loads of modern capabilities that SharePoint Online users take for granted. Things like modern team sites, slick communication pages, and the latest collaboration tools show up in SharePoint Online first (sometimes years before they appear on-premise, if they ever do). On-premise gives you deep customisation through farm solutions (bundled extensions that customise or extend SharePoint admin functions), but that flexibility comes with upgrade headaches down the line.

SharePoint Online gets new features constantly without you lifting a finger. You can enjoy fancy AI-powered search and responsive designs that work on any device. There’s also tight integration with Teams, Power BI, and the rest of the Microsoft 365 family all just work. You’re limited to safer customisation approaches like SharePoint Framework and Power Platform tools, which might frustrate teams used to having complete control. But this restriction keeps your customisations from breaking every time Microsoft rolls out updates, which happens pretty regularly.

Security and compliance

SharePoint on-premise puts security entirely in your hands. You control everything from network isolation to encryption methods, which is brilliant if you’ve got specific requirements or work in a heavily regulated industry. The downside is that you’re also responsible for spotting vulnerabilities, applying patches (usually during planned maintenance windows), and dealing with threats. Your security is only as good as your team’s expertise and how quickly they can respond when something goes wrong.

SharePoint Online taps into Microsoft’s massive security infrastructure. They’ve got teams monitoring threats 24/7 alongside machine learning spotting dodgy behaviour. They can also roll out patches automatically without any downtime. Features like Advanced Threat Protection and Data Loss Prevention come built-in with the right licenses. Microsoft handles the infrastructure compliance for standards like ISO 27001, HIPAA, and GDPR, though you’re still responsible for managing who accesses what and how your data is governed. It’s a shared responsibility model that works well if you’re comfortable with Microsoft holding the keys to the kingdom.

Performance and accessibility

SharePoint on-premise can be blazing fast on your local network, with near-instant response times for users in the office. But remote access is another story. You’ll need VPNs, which add complexity and can slow things down. External collaboration gets even trickier, often needing reverse proxies and extra security layers that many firms find too much hassle to bother with. If you need to scale for peak times, you’re stuck buying infrastructure for the worst-case scenario, even if you only need it twice a year.

SharePoint Online generally brings you a more consistent performance experience through Microsoft’s global network. It uses content delivery networks to keep frequently accessed files close to your users wherever they are. It scales automatically when things get busy, and mobile access works without any VPN faff. Yes, you’re dependent on having a decent internet connection, but that’s rarely an issue these days. The trade-off is worth it for most organisations who want their teams to collaborate from anywhere without IT having to jump through hoops.

Management and maintenance

Managing SharePoint on-premise is usually a full-time job, sometimes needing multiple people in larger organisations. You’re dealing with database maintenance, search indexes, service applications, patches, and all sorts of other technical bits that need constant attention. Monitoring means additional tools and expertise to track performance and spot problems before users start complaining. When something goes wrong, troubleshooting can be a nightmare if you don’t have deep SharePoint knowledge. Major version upgrades are massive projects that can take months of planning and testing.

SharePoint Online takes most of that pain away. Microsoft handles all the infrastructure stuff, applying updates easily without you even noticing. The admin centre gives you straightforward tools for the day-to-day tasks like creating sites, managing storage, and sorting out sharing settings. You lose some granular control, but most organisations find they don’t miss it. PowerShell is still there for automation, and you can build complex governance workflows using Power Automate without writing custom code. Your IT team can actually focus on helping users rather than nursing servers.

There’s sometimes confusion about SharePoint on Azure versus SharePoint Online. They’re fundamentally different approaches, though both involve Microsoft’s cloud.

SharePoint on Azure means running SharePoint Server on Azure virtual machines. It’s basically on-premise SharePoint without the physical servers. You still install everything, manage SQL Server, apply patches, and handle all the admin work. The benefit is you get on-premise-style control without owning any hardware. But you’re still managing virtual infrastructure and paying for compute, storage, and networking on top of SharePoint licensing. Costs can spiral quickly.

SharePoint Online is a proper Software-as-a-Service though. You use SharePoint capabilities without managing any infrastructure at all. For most organisations, SharePoint Online is better value with way less complexity than running SharePoint on Azure’s IaaS. The only time SharePoint on Azure makes sense is when you need a specific old version or have customisations that absolutely won’t work in SharePoint Online.

SharePoint Online and Azure Files are sometimes compared — but while they both store files in Microsoft’s cloud, their use cases differ a fair bit.

Azure Files is basically a network drive in the cloud. It uses the SMB protocol, so applications think they’re talking to a traditional file share. Perfect for lifting and shifting old applications to the cloud, but there’s no web interface, no version history, no co-authoring, nothing collaborative about it. It’s pure storage infrastructure.

SharePoint Online is a full collaboration platform. You get version history, simultaneous editing, workflows, metadata, powerful search, and mobile apps. Plus proper security features like granular permissions and data loss prevention.

• Use Azure Files when apps need simple file storage.
• Choose SharePoint Online when humans need to work together on documents.

They’re complementary services that solve different problems.

SharePoint on-premise has been the backbone of enterprise collaboration for many years, and there are good reasons why some organisations still swear by it. But that control and flexibility come with trade-offs that are getting harder to ignore.

SharePoint Online is Microsoft’s vision for modern collaboration, and it’s clear they’re putting most of their development effort here. While the cloud-first approach solves many traditional SharePoint headaches, it does mean accepting some new limitations.

Highly regulated industries with strict data sovereignty requirements often choose on-prem deployments. Government agencies and financial institutions for example need complete control over data location and access. SharePoint on-premise allows them to meet these requirements while getting modern collaboration capabilities.

Organisations with big SharePoint investments face difficult decisions. Years of customisations, workflows, and third-party solutions they’ve built make up significant IP. If these are business-critical and can’t be modernised for SharePoint Online, running on-premise deployments might be necessary.

Air-gapped environments have no choice but on-premise deployment. Some secure facilities, research labs and industrial control systems operate without internet connectivity for security reasons. SharePoint on-premise gives collaboration capabilities within these isolated networks.

Complex integration scenarios sometimes favour on-premise deployments. Legacy systems expecting custom authentication mechanisms or deep integration with on-prem systems might struggle with cloud migration. The effort to modernise these integrations might exceed the benefits of moving to SharePoint Online.

Modern distributed workforces thrive with SharePoint Online. Employees can access documents from any device, anywhere, without VPN hassles. SharePoint Online lets them do this while keeping things secure with conditional access and mobile device management.

Small to medium businesses benefit a lot from SharePoint Online’s managed service approach. Without dedicated IT infrastructure or SharePoint expertise, SMBs can enjoy an enterprise-grade collaboration platform. The operational expenditure model aligns with cash flow, avoiding large capital investments.

Microsoft 365 organisations find SharePoint Online integration quite attractive. If you’re already using Teams, Exchange Online, and other Microsoft 365 services, SharePoint Online completes the ecosystem. Single sign-on, unified administration, and nice integration between services simplifies both IT management and user experiences.

Rapidly growing companies appreciate SharePoint Online’s elasticity. Start-ups and scale-ups can’t predict infrastructure needs accurately. SharePoint Online grows with them, adding capacity instantly without procurement delays or capacity planning exercises.

Project-based collaboration works brilliantly in SharePoint Online. Spin up project sites in minutes, invite external partners securely, and archive completed projects without infrastructure overhead. The flexibility to create and collaborate without IT involvement means projects get delivered faster.

It’s not hard to see the advantages that the cloud version of SharePoint has. In many cases, it’s the sensible choice: newer, more modern, and more flexible. But that’s not always what you need.

SharePoint on-premise gives complete control for those with specific requirements that cloud services can’t meet.

Looking for some guidance on which SharePoint to use? At Synextra, we’re well-versed in helping organisations deal with decisions like these. Whether you’re planning a migration, evaluating choices, or optimising existing deployments, we’re here to help. Contact us today to discover your options.