What Is Directory as a Service (DaaS)? A modern cloud alternative to traditional Active Directory

Directory as a Service (DaaS) is a cloud-hosted directory platform that manages users, groups, devices, and access to applications without on-premises servers. Think of it as the next step after Microsoft Active Directory – designed for remote work, SaaS apps, and small to mid-sized businesses that do not want to run their own domain controllers.

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Core Concept

Directory as a Service in simple terms

In many organizations, the directory is the “phone book plus control panel” of IT. It knows who your users are, which groups they belong to, what devices they use, and which systems they can log into. For years, this directory has typically been Microsoft Active Directory, running on servers inside your office.

Directory as a Service (DaaS) moves that idea to the cloud. Instead of maintaining domain controllers, patching Windows Server, and keeping VPNs alive, you use a hosted directory platform. It still gives you users, groups, and access policies, but:

It is delivered as a secure cloud service.
It works well with SaaS applications, not just on-prem servers.
It is built for remote and hybrid teams by design.

Why do organizations need Directory as a Service?

Traditional identity setups were built for a world where:

Everyone worked in the same office or campus.
Most applications ran on servers in the local network.
Devices rarely left the building.

That environment has changed completely. Today, even a small company might use 10–30 SaaS tools, have people working from home, coffee shops, and client locations, and manage a mix of laptops, phones, and network devices. Trying to stretch a purely on-premises directory over this world usually leads to:

Complex VPN setups just so users can authenticate.
Multiple disconnected user stores across different apps.
Manual account creation and cleanup when people join or leave.
Inconsistent MFA and security policies between systems.

A DaaS platform addresses this by becoming a single, cloud-based source of truth for identities and access. Users authenticate directly against the cloud directory, apps trust the directory for login decisions, and IT gets one place to define policies like:

Who can log into which application.
From which locations or IP ranges.
On what kind of device.
With or without MFA.

Directory as a Service vs Microsoft Active Directory

Microsoft Active Directory (AD) has been the standard directory service for two decades. It integrates deeply with Windows, Group Policy, and on-premises networks. For many enterprises with large on-site infrastructure, AD still has a place.

A Directory as a Service solution takes the core ideas of AD – identities, groups, policies – and rethinks them for a cloud-first, SaaS-heavy, remote-friendly world.

Aspect	Microsoft Active Directory	Directory as a Service (DaaS)
Deployment model	On-premises servers (domain controllers)	Cloud-hosted platform, no servers to manage
Primary environment	Local network / Windows domain	Internet-connected, hybrid, remote teams
App focus	Windows servers, legacy on-prem apps	SaaS apps, web apps, APIs, cloud workloads
Identity access to SaaS	Often needs extra layers (ADFS, Azure AD, etc.)	Built-in SSO and integration for cloud apps
Remote work support	Usually requires VPN and complex networking	Designed for remote login from anywhere
Maintenance	Patching, backups, monitoring domain controllers	Handled by the DaaS provider
Cost structure	Licensing + server hardware + admin time	Subscription-based, predictable operating expense

This doesn’t mean Active Directory is “wrong” – but it does mean it was designed for a different era. DaaS simplifies many layers that SMBs would otherwise have to stitch together: directory, SSO, MFA, and remote access.

Why Directory as a Service is often the best choice for SMBs

Small and mid-sized businesses rarely have the luxury of a large internal IT team dedicated to server operations. They still need strong security and central control, but without the complexity and cost overhead of running traditional AD infrastructure.

Lower operational overhead

With DaaS, there are no domain controllers to patch, no backup jobs to babysit, and no physical or virtual servers to size and upgrade. The provider runs the platform; your team focuses on users, access, and security policies.

Built for SaaS and remote work

SMBs often grow around cloud tools like Microsoft 365, Google Workspace, CRM, and project management apps. A DaaS platform integrates directly with these, offering Single Sign-On, MFA, and central lifecycle management without forcing everyone through a VPN.

Predictable, scalable pricing

Instead of hardware purchases and complex CAL licensing, DaaS is usually subscription-based. You pay for what you use – typically per user or per device – which aligns better with how SMBs plan their budgets.

For many SMBs, DaaS offers the right balance: enterprise-grade directory features without enterprise-level infrastructure overhead. It delivers what they actually use – cloud identity, SSO, MFA, device awareness – in a way that is easy to roll out and manage.

How a DaaS product like Viami fits into this picture

A platform such as Viami Directory as a Service takes these ideas and applies them in a very practical way. It centralizes:

Directory services for users, groups, and organizational units.
Single Sign-On for SaaS and internal web apps.
Identity Access Management for provisioning and deprovisioning.
Adaptive authentication with conditional rules and MFA.
Device management for Windows, Android, and network devices.

Instead of assembling all this from separate tools, SMBs get a unified, cloud-hosted directory solution that feels familiar but operates at the speed and flexibility of the modern internet.

Learn More About Viami DaaS