Cloud platform for an agency running infrastructure for many clients

If you mean a platform for an agency/MSP to manage cloud infrastructure for many clients, the best fit depends on whether you want to stay with one cloud provider or manage several.

• Azure-focused: Azure Lighthouse is Microsoft’s built-in multitenant management layer. Your team can manage delegated customer resources from its own Azure tenant, without switching tenants; it has no extra charge. (learn.microsoft.com)
• AWS-focused: AWS Organizations + Control Tower are the native starting point for organizing and governing multiple AWS accounts. For client isolation, a common setup is separate accounts per client, with shared governance and automation. (docs.aws.amazon.com)
• Multi-cloud billing/optimization: DoiT PartnerOps or North.cloud may be worth evaluating if you need consolidated views across AWS, Azure, and Google Cloud. They’re more focused on cloud operations and cost management than replacing each provider’s native controls. (doit.com)

Practical default: keep each client’s cloud environment—and billing—separate, and use delegated access plus infrastructure-as-code to standardize deployments. Choose Azure Lighthouse or AWS Organizations/Control Tower if you mostly operate in one cloud; look at a third-party platform if your main pain is coordinating across clouds.

Are you looking for a cloud provider, a management console, or a platform to build and host your clients’ infrastructure? And which clouds do you use?

There's no single best cloud for agencies. The right choice depends on whether your clients own their cloud accounts or you own them, and on which provider they already use. Here's how I'd think about it.

Pick the model first

• Clients own their accounts (most common for agencies). Use delegated access so each client keeps billing, data, and control. Azure Lighthouse fits this best. It is free, and delegated resource usage is billed normally in the customer tenant. Customers explicitly delegate access rights via Azure Resource Manager templates or managed service offers, but retain full control and can revoke permissions at any time. It also lets you manage Azure resources across multiple tenants from your own Microsoft Entra tenant, without switching between tenant logins.
• You own the accounts and consolidate them. Use AWS Organizations (with Control Tower for guardrails) or Google Cloud's organization hierarchy. In AWS, both AWS and Google Cloud organizations control not just the resources created but also the entire account including identity and access management (IAM). Google projects belong to the organization instead of the employee who created the project. Consolidation is simpler for you, but clients have less independence.

Choose by existing client footprint

• Clients on Microsoft/Windows stacks or hybrid setups: Azure. One source notes Azure excels with seamless Microsoft integration and hybrid cloud support.
• Broadest service catalog and most third-party tooling: AWS. AWS leads with extensive services and global scale.
• Data, analytics, or container-heavy workloads: Google Cloud. Google Cloud dominates in data, AI, and container innovation.
• Mixed client base: don't force one provider. Standardize your tooling and landing-zone patterns so each client's environment looks the same to your team.

Things to get right regardless of provider

• Under the shared responsibility model, customers are responsible for data encryption, identity and access management (IAM), and application-level security, so your agency's standards for IAM, encryption, and logging matter most.
• Set up the account or tenant structure before the first production workload. Your own write-up of this structure should include a naming convention, tagging, a baseline security policy, and a per-client cost view.
• Enforce MFA for anyone managing client resources. Azure's guidance recommends this for users in managing tenants.

My recommendation

If your clients mostly run on Microsoft or can be moved there, use Azure Lighthouse with delegated access. If most clients are on AWS, use AWS Organizations for accounts you own and cross-account roles for clients' accounts. If you tell me how many clients you have, which clouds they use now, and whether you resell or bill for infrastructure, I can narrow this to one option.

For an agency managing infrastructure for multiple clients, the "best" platform depends on whether you need a managed hosting environment (where the platform handles the heavy lifting) or a cloud management platform (CMP) (where you retain full control over underlying cloud accounts).

1. If You Want Managed Hosting (Best for Efficiency & Speed)

If your primary goal is to focus on development and client delivery without managing raw servers, VPCs, or complex security configurations, look for platforms that offer multi-tenancy and centralized management dashboards specifically designed for agencies.

• DevPanel: An enterprise-grade platform built on the "Bring Your Own Cloud" (BYOC) model. It allows you to manage infrastructure across various cloud providers from a single dashboard, offering features like auto-pausing dev environments and browser-based IDEs.
• Cloudways: A popular managed PaaS that provides a centralized dashboard to deploy and manage applications (WordPress, PHP, Laravel) across multiple cloud providers (like DigitalOcean, AWS, and GCP). It is ideal for agencies that need simple server management without deep DevOps overhead.
• Kinsta / WP Engine: Best if your agency is exclusively focused on WordPress. These platforms offer premium, performance-optimized, and highly secure managed environments. They handle all the infrastructure complexity, allowing you to focus entirely on the client's site.

2. If You Need Full Control (Best for Custom Architectures)

If your clients have complex, diverse, or highly regulated workloads, you will likely need to manage raw accounts in AWS, Azure, or Google Cloud (GCP). To avoid "dashboard fatigue," you should use a Cloud Management Platform (CMP) to create a unified control plane.

• Cycloid: Designed specifically for MSPs/agencies, it provides a multi-tenant portal that abstracts away the complexity of AWS, Azure, and GCP. It includes built-in DevOps tools (CI/CD, cost estimation, and monitoring) that help you manage multiple client environments under one roof.
• CloudBolt: A powerful tool for hybrid/multi-cloud governance. It excels at providing "single pane of glass" visibility, enforcing policies, and tracking costs across complex client environments. It is highly extensible if your agency already uses tools like Terraform or Ansible.
• Flexera One: A high-end solution suitable for agencies managing large-scale, complex hybrid-cloud estates. It combines FinOps (cost management) with IT Asset Management, making it a strong choice if you need to manage licensing and compliance alongside infrastructure.

3. The "Industry Standard" Strategy

Most modern agencies managing infrastructure at scale do not rely on a single GUI. They adopt an Infrastructure as Code (IaC) strategy to ensure consistency across hundreds of client environments.

• Terraform / OpenTofu: These are the standard tools for provisioning infrastructure. By using them, you can define your clients' infrastructure as code, ensuring that every deployment is repeatable, documented, and easy to audit.
• Centralized CI/CD: Instead of logging into cloud consoles manually, agencies build pipelines (using tools like GitHub Actions, GitLab CI, or the CI/CD features within platforms like Cycloid) to push updates across all client environments simultaneously.

Summary Recommendation

Pro Tip: If you choose the "hyperscaler" route (AWS/Azure/GCP), ensure you set up a multi-account structure (e.g., AWS Organizations or GCP Resource Manager) from day one. This provides the best isolation for security and billing, which is essential when managing infrastructure for many distinct clients.

If you mean a cloud setup for an agency managing infrastructure for multiple clients, choose a platform with separate client environments and delegated access—not one shared account with everyone mixed together.

• Azure: A strong fit if you need to manage many independent client tenants. Azure Lighthouse lets your staff work from your agency’s tenant with access delegated to specific client subscriptions or resource groups; clients retain control and can revoke access. ¹²
• AWS: A good fit if your clients use AWS and you need account-level separation and centralized governance. AWS Organizations supports managing multiple accounts, applying policies, and consolidating billing. Decide carefully whether client accounts belong in your organization or remain in theirs, since that affects billing and governance. ³⁴
• Google Cloud: Also worth considering if your clients already run on Google Cloud; its partner program includes an MSP track. ⁵

Practical default: onboard each client into a separately scoped environment, use individual staff identities with least-privilege access, and keep monitoring, backups, and automation centralized where the platform allows. If you share which cloud you use—and whether clients should own and pay for their accounts—I can suggest a more specific setup.

Sources: ¹ Azure Lighthouse overview · ² Azure delegated resource management · ³ AWS Organizations · ⁴ AWS delegated administration · ⁵ Google Cloud MSP initiative