Azure Government vs AWS GovCloud: Which Platform Fits Your Compliance and Security Needs

By Michael Branson, Founder and COO, i3solutions

Azure Government vs AWS GovCloud: which platform better aligns with our compliance and security needs?

Say this plainly before anything else: i3solutions is a Microsoft firm. We hold no AWS delivery credential and we are not going to pretend otherwise on our own website. What we do have is the thing buyers actually need at this stage, which is a clear read on which criteria decide a government cloud platform choice and which ones only look like they do. If that read sends you to AWS GovCloud, that is a correct outcome and an AWS specialist is the right partner for it.

What genuinely differs, from each vendor’s current published documentation

The authorization boundary and its vocabulary. The two vendors currently describe their FedRAMP status in different program language, and that trips buyers up more than any technical difference. Microsoft’s Azure Government compliance page states that Azure Government maintains a “FedRAMP High Provisional Authorization to Operate (P-ATO) issued by the FedRAMP Joint Authorization Board (JAB)” for the regions US Gov Arizona, US Gov Texas and US Gov Virginia. AWS’s FedRAMP page now states that “AWS GovCloud (US) is FedRAMP Certified Class D (formerly High baseline)” and that “AWS US East-West (Northern Virginia, Ohio, Oregon, Northern California) is FedRAMP Certified Class C (formerly Moderate baseline)”, adding that “The JAB Provisional Authority to Operate (P-ATO) previously issued to AWS is a legacy designation”. Read those side by side and the difference is program terminology, not security posture. Both government offerings sit at what was, and in Microsoft’s wording still is, the High baseline.

DoD impact levels. Microsoft’s page lists DoD IL2, IL4 and IL5 Provisional Authorizations issued by DISA for the three US Gov regions, and separately notes that “Some Azure services deployed in Azure Government regions (US Gov Arizona, US Gov Texas, and US Gov Virginia) require extra configuration to meet DoD IL5 compute and storage isolation requirements.” AWS’s DoD compliance page states that “AWS has been assessed and approved as a cloud service provider for the US East and US West Regions at Impact Level 2, AWS GovCloud (US) at Impact Levels 4 and 5, and the AWS Secret Region at Impact Level 6”, and that “At Impact Level 6, The AWS Secret Region holds a DoD provisional authorization for workloads up to and including Secret level.” Two things follow. At IL4 and IL5 the platforms are peers. Above IL5 both vendors move you into air-gapped clouds, and Microsoft’s comparison page is explicit that its published tables “do not include feature or bundle availability in the Azure Government Secret or Azure Government Top Secret clouds” and directs you to your account team. So on public documentation alone, AWS publishes an IL6 statement and Microsoft defers the equivalent conversation. That is a documentation difference, and treating it as a capability verdict would be reading too much into it.

Data residency and personnel screening. Microsoft states that “Azure Government uses physically isolated datacenters and networks located in the US only” and provides “an extra layer of protection to customers through contractual commitments regarding storage of customer data in the US and limiting potential access to systems processing customer data to screened US persons”, with customers “subject to validation of eligibility”. AWS describes GovCloud as “Two physically and logically isolated U.S. sovereign regions, AWS GovCloud (US-East and US-West), operated by U.S. citizens on U.S. soil”, and states that “Root Account holders must pass a screening process validating U.S. persons status and must be a (green card holder or citizen as defined by the U.S. Department of State).” Both are US persons regimes. The mechanics differ: Microsoft gates on tenant eligibility validation, AWS gates at the account root. If your export control counsel cares about who can touch the account, read both of those sentences with them rather than summarizing either.

Service parity in the region you would actually deploy into. This is where real projects break. Microsoft’s own comparison of Azure Government and global Azure warns that “Certain services and features that are in specific regions of global Azure might not be available in Azure Government” and that “Feature configurations in Azure Government might differ from those in global Azure”, pointing readers at the Products available by region listing “for the latest, up-to-date information on service availability”. The same caution applies on the AWS side. Neither vendor’s government cloud is a mirror of its commercial cloud, and the gaps move. Build the list of services your architecture depends on and check each one against the current listing before you commit.

The criteria buyers think decide it, and do not

• “One of them is FedRAMP High and the other is not.” Both government offerings sit at that baseline under each vendor’s own current wording. The vocabulary gap described above is a program change, not a gap in posture.
• “IL5 is the tiebreaker.” Both are authorized at IL5. If IL5 alone is your requirement, it will not discriminate between them, and choosing on it means you chose on nothing.
• “ITAR, CJIS or DFARS certification.” Microsoft frames these as obligations Azure Government “can help you meet”, and puts the responsibility plainly: “You’re responsible for designing and deploying your applications to meet US export control requirements such as the requirements prescribed in the EAR, ITAR, and DoE 10 CFR Part 810.” These are properties of your data and your contract, not badges a platform confers. A vendor page listing a regulation is not the same as your obligation being satisfied.
• “We obviously need a government cloud.” Sometimes not. Microsoft’s own comparison states that global Azure and Azure Government are both “assessed and authorized at the FedRAMP High impact level”, and that what Azure Government adds is contractual commitments on US data storage and screened US persons access. If your data classification does not invoke those commitments, a government cloud adds cost and service constraints and buys you nothing. Do the classification first.
• Published price list comparisons. Government cloud pricing rarely decides a decision that is really about identity gravity and operational competence, and it is the input that changes most often after you sign.

When AWS GovCloud is the right answer

• Your estate is already AWS. If your workloads, tooling, infrastructure-as-code and on-call runbooks are AWS-native, moving to Azure Government buys you a compliance posture you already had and costs you every piece of operational muscle your team built. That trade is almost never worth it, and it is the most common reason a Microsoft firm should tell a buyer to stay put.
• Your architecture depends on an AWS service with no Azure Government equivalent in the region you need. Verify per service against both vendors’ current region listings. A single missing managed service can dictate the whole decision.
• Secret-level workloads where you want the boundary in published documentation now. AWS states the IL6 position for its Secret Region on its public DoD compliance page. Microsoft handles the equivalent through the account team. If your acquisition timeline needs the published statement in front of a reviewer this quarter, that asymmetry is real.
• Account-level US persons control is the specific control your counsel wants. AWS’s root account screening requirement is a concrete, checkable gate that some export control reviews find easier to evidence than a tenant eligibility validation.
• Your program office standardized on AWS. Fighting a customer’s standard to gain a compliance parity you already have is a bad use of political capital.

When Azure Government is the right answer

• Your identity and collaboration estate is already Microsoft. If you run Microsoft 365 in a government cloud, your identity, device management and document estate already sit in the Microsoft boundary, with Entra ID authenticating at login.microsoftonline.us rather than the commercial endpoint. Building the application estate elsewhere means operating two identity perimeters and reconciling them permanently. This is the strongest argument on the Microsoft side, and note that it is an architecture argument, not a compliance one.
• You need IL5 with documented isolation guidance you can hand an assessor. Microsoft publishes the IL5 compute and storage isolation requirements per service, which shortens the evidence conversation.
• Your workloads are Microsoft workloads. SharePoint, Dynamics, Power Platform and .NET estates carry lower friction and fewer surprises inside the Microsoft government boundary, and the licensing conversation stays in one place.
• You are already going to GCC High for collaboration. Splitting collaboration and applications across two sovereign clouds is a durable operating cost that rarely appears in the business case that authorized it.

When to bring in a partner

Most of this work does not need outside help. Reading two vendor pages is not consulting. A partner earns the engagement in three places: turning contract clauses into a defensible data classification, verifying service availability and authorization boundary per service in the exact region you would deploy into, and pricing the cost of a split identity perimeter honestly before someone commits to one.

On the Microsoft side of that boundary, here is what i3solutions is attested to do. i3solutions advises clients on federal compliance posture as its own assessment rather than as a restatement of Microsoft’s documentation, including whether SharePoint Online meets NIST 800-53, whether Azure Government is required under the DoD Cloud Computing SRG, and whether a CMMC gap assessment is needed to bid. i3solutions plans and runs governed Azure and Microsoft 365 migrations with senior, U.S.-based engineers. i3 installs and helps configure applications inside IL4 and IL6 government cloud environments and other government networks. i3solutions has been a Microsoft partner since 1997. i3solutions has completed more than 600 Microsoft platform implementations.

On the collaboration side: We manage GCC High migrations end-to-end: from eligibility validation and licensing coordination with your AOS-G supplier through identity architecture, data migration, security baseline configuration, and post-migration governance. i3Solutions plans and runs these migrations for regulated defense organizations, structuring each phase around the compliance evidence assessors expect. Two boundaries inside that sentence are load bearing: i3solutions does not hold AOS-G status, and tenant provisioning itself is performed by a certified AOS-G supplier alongside whom i3solutions works.

What is not claimed, and should not be inferred. i3solutions does not hold a FedRAMP authorization at any impact level. i3solutions does not hold a DoD authorization of its own. i3solutions has not authorized, accredited or issued an authority to operate for any system. i3solutions has not performed a full tenant migration into IL4 or IL6. And i3solutions has no attested AWS delivery record, which is why every AWS statement on this page is a quotation from AWS’s own published documentation rather than a claim about our experience. Authorizations belong to the cloud service provider and to your own system boundary. Any consulting firm advertising one of its own is describing something that does not work the way the phrase implies, and that is worth checking on every firm you talk to, including this one.

If the decision lands on Microsoft, the next questions are practical rather than comparative: whether GCC High or GCC Moderate fits your obligations is covered in the GCC High versus GCC Moderate comparison, the sequencing and eligibility work is set out in the GCC High migration checklist, the workload move itself is described on the Azure Government migration page, and the sensitive data boundary is covered on the GCC High and sensitive data protection page. If it lands on AWS, take this page’s criteria to an AWS specialist and make them answer the same four questions.

Frequently asked questions

Is Azure Government or AWS GovCloud more compliant?

Neither, at the levels most government contractors operate at. Microsoft’s Azure Government compliance page records a FedRAMP High Provisional Authorization to Operate issued by the FedRAMP Joint Authorization Board and DoD Impact Level 2, 4 and 5 Provisional Authorizations issued by DISA. AWS’s FedRAMP page describes AWS GovCloud (US) as FedRAMP Certified Class D, formerly the High baseline, and its DoD compliance page records GovCloud approved at Impact Levels 4 and 5. Both restrict operator access to screened US persons. The compliance ceiling therefore rarely discriminates, and treating the comparison as a compliance contest is the most common way this decision goes wrong.

What DoD Impact Levels does each platform support?

From each vendor’s own documentation: Azure Government maintains DoD Impact Level 2, Impact Level 4 and Impact Level 5 Provisional Authorizations issued by DISA for US Gov Arizona, US Gov Texas and US Gov Virginia, with Microsoft noting that some services in those regions require extra configuration to meet IL5 compute and storage isolation requirements. AWS states it is approved for US East and US West at Impact Level 2, AWS GovCloud (US) at Impact Levels 4 and 5, and the AWS Secret Region at Impact Level 6, holding a DoD provisional authorization for workloads up to and including Secret level. Above IL5 both vendors move you to air-gapped clouds, and Microsoft’s published comparison tables exclude its Secret and Top Secret clouds and direct you to your account team.

What actually decides the platform if compliance does not?

Four things, in this order. Where your identity and collaboration estate already lives, because running Microsoft 365 in a government cloud and the application estate somewhere else means operating two identity perimeters permanently. Whether every service your architecture needs is available and inside the authorization boundary of the specific government region you would deploy into, verified against each vendor’s current region listing rather than assumed from commercial parity. What your own contract clauses require of your data, which is a determination about your obligations rather than a property of a cloud. And which platform your engineering team can already operate under pressure, which is a legitimate input regularly treated as an embarrassing one.

Does i3solutions hold a FedRAMP or DoD authorization?

No. i3solutions does not hold a FedRAMP authorization at any impact level, does not hold a DoD authorization of its own, has not authorized, accredited or issued an authority to operate for any system, and has not performed a full tenant migration into IL4 or IL6. What is attested is that i3 installs and helps configure applications inside IL4 and IL6 government cloud environments and other government networks. Authorizations belong to the cloud service provider and to your own system boundary. i3solutions is a Microsoft firm with no attested AWS delivery record, which is why every AWS fact on this page is quoted from AWS’s published documentation.

Do we need a government cloud at all, or will the commercial cloud do?

That is a contractual determination rather than a technical preference, and it should be made before the platform decision rather than justified after it. Microsoft’s own comparison states that global Azure and Azure Government are both assessed and authorized at the FedRAMP High impact level, and that what Azure Government adds is contractual commitments on storing customer data in the US and limiting access to screened US persons. So the government cloud question is really a question about your data classification and your export control exposure. If the classification says commercial is sufficient, a government cloud adds cost and service constraints for no benefit. If it does not, discovering that after you have built is the expensive path.

What does a Microsoft government cloud implementation cost?

For Microsoft 365 government tenants, i3solutions publishes this directional band. Directional bands for organizations with 50 to 500 users: implementation costs typically range from $50,000 to $200,000, covering tenant provisioning, identity migration, data transfer, security configuration, and compliance validation. Treat that as a plausibility check against a defined scope rather than a quote. The variables that move it are user count, how many repositories are in scope, how much of the identity estate has to be rebuilt rather than migrated, and how many compliance frameworks the evidence has to satisfy. No equivalent band is published here for AWS GovCloud, because i3solutions has no attested AWS delivery record to base one on.