How to Choose a Colocation Provider
Choosing a colocation provider is a procurement decision, not a branding exercise. The right provider delivers usable IT kW on your go-live date, the carriers and cloud on-ramps your architecture needs, and contract terms that protect you when things go wrong. This guide walks through the evaluation criteria commercial buyers should use to compare providers side by side.
Start with your requirements, not the provider list
Before evaluating any provider, freeze your commercial requirement. Write down your initial cabinets or U count, 24-month growth estimate, total IT kW, sustained kW per rack, redundancy expectation, hard interconnect requirements (named carriers, AWS/Azure/GCP on-ramps), compliance evidence needed, and contract target go-live date.
Without this, every provider pitch sounds good. With it, you can eliminate buildings that cannot serve your workload on your timeline.
If the location is still open, compare two metros for your site first.
Power: qualify usable kW, not brochure capacity
Power-first qualification prevents winning a cheap cabinet you cannot energize. A provider with 50 MW of facility capacity but 5 kW available in your target hall is not a fit for a 20 kW/rack deployment.
- Is quoted kW usable IT load in the named hall today, or contingent on utility/build milestones?
- What is the installed max sustained kW/rack with cooling already in place?
- Contractual ready-for-service date and remedies if it slips?
- How is overage billed?
Cooling: match density to your workload
Standard air cooling handles 5-10 kW/rack in most halls. If your deployment exceeds that, confirm the provider has higher-density cooling in place—rear-door heat exchangers, direct-to-chip liquid, or in-row units. Do not accept future cooling promises; verify installed capacity.
Connectivity: verify building-level, not metro-level
A provider with great space pricing but limited carrier diversity can cost more in cross-connect fees and latency. Score interconnect like a line item in your TCO comparison.
- Which carriers are physically present in the building (not just the metro)?
- Are cloud on-ramps (AWS Direct Connect, Azure ExpressRoute, Google Cloud Interconnect) present in this building?
- What are cross-connect MRC and NRC, and what are typical lead times?
- Is the meet-me room carrier-neutral, or does one operator control interconnect?
SLA and contract terms
Read the actual SLA document, not the marketing summary. Negotiate escalation and termination clauses before signing.
- Measurement method for power and environmental SLAs
- Maintenance exclusions and chronic-outage termination rights
- Escalator floor/cap and renewal pricing mechanic
- Expansion rights on adjacent kW at known commercial terms
- Remote-hands response times and after-hours rates
- Exit / de-install obligations and migration overlap
Compliance and certifications
If your workload requires SOC 2, ISO 27001, PCI-DSS, HIPAA, or FedRAMP evidence, request the actual audit reports—not a badge on a website. Confirm the certification covers the specific building and hall you will occupy.
Scalability and expansion
Ask about adjacent expansion rights: can you add cabinets or kW in the same hall at known commercial terms? Is there physical space for a cage or suite upgrade? Providers with available capacity in your building give you growth optionality without a migration.
Normalize TCO across 3+ providers
Convert each proposal to $ / usable kW / month over the full term, including power method, cross-connects, remote hands, NRC/cage build, escalator, and renewal. A low MRC with high NRC and restrictive cross-connects can cost more than a higher-MRC proposal with included interconnect.
See how to normalize and score colocation quotes in a single comparison grid.
Once you have a shortlist, use a data center site visit checklist to verify each finalist in person.
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