Every growing business eventually faces the multi-cloud question. Usually it comes up after a major AWS or Azure outage, or when a vendor pitches Google Cloud pricing that looks significantly better for a specific workload. The decision has real consequences either way.
The case for single cloud
For companies under 150 employees, a single cloud provider usually wins. The reasons are operational, not technical.
- Simplified management. One console, one billing account, one set of IAM policies, one networking model. Every additional cloud multiplies operational complexity.
- Deeper discounts. Committed Use Discounts (AWS) and Reserved Instances reward consolidated spend. Splitting workloads across providers reduces your negotiating leverage with each.
- Faster onboarding. Your team builds expertise in one ecosystem. Switching contexts between AWS and GCP is a real cognitive overhead that slows incident response.
The case for multi-cloud
Multi-cloud makes sense when you have specific, well-defined reasons — not as a default hedge against vendor lock-in.
- Best-of-breed services. If your ML workloads run materially better on Google’s TPUs, run them there. Keep everything else consolidated.
- Customer data residency. Some enterprise contracts require data to stay within specific geographic or provider boundaries.
- Regulatory requirements. Certain compliance frameworks mandate redundancy across independent infrastructure providers.
- M&A integration. Acquired companies often bring existing cloud commitments that aren’t worth migrating immediately.
The multi-cloud trap to avoid
The most common mistake is adopting multi-cloud for theoretical resilience, then discovering the operational cost exceeds the risk mitigation benefit. Running the same workload across two clouds for redundancy sounds good until you’re maintaining two separate deployment pipelines, two sets of security policies, and two billing reconciliation processes.
A better approach to resilience: invest in proper availability zones, automated failover, and runbooks within a single provider before adding a second.
The decision framework
Start single-cloud. Add a second provider only when you have a specific, measurable business reason — not a theoretical one. If you’re not sure which cloud to start with, the answer is almost always AWS for infrastructure flexibility or Microsoft Azure if your team is already deeply invested in the Microsoft ecosystem.
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