The AWS Solutions Architect Professional (SAP-C02) and the Azure Solutions Architect Expert (AZ-305) are the top design credentials on their respective clouds: proving you can architect solutions across real organisational complexity. The decision is rarely about which exam is “better” in the abstract; it is about the platform your employers use and where you design systems. Here is the detailed comparison, beyond the table above.
The core difference
The AWS Solutions Architect Professional tests architecture across organisational complexity: designing for organisational complexity (multi-account environments, cross-account networking, centralised governance), designing new solutions, continuously improving existing systems, and accelerating workload migration and modernisation. The questions are long and often have several defensible answers, rewarding judgement across the whole AWS platform.
The Azure Solutions Architect Expert (AZ-305) tests designing Azure solutions across four areas: infrastructure, identity, governance and monitoring, data storage, and business continuity, balancing requirements, cost, security and reliability. It uses case studies and rewards architectural judgement rather than recall.
So the split is purely platform: the same senior architecture role, the same kind of design thinking, expressed in different service names. If you already know which cloud you design on, the choice is largely made.
Cost compared
Here the two genuinely differ. The AWS SA Professional exam is US$300 (confirm current pricing with AWS), double the AZ-305 fee of around US$165 (confirm current pricing with Microsoft). Neither has a formal prerequisite or education barrier, but the AWS exam is the more expensive sitting and a costlier retake if you fail.
Preparation can be free on both sides: AWS Skill Builder and the official exam guide on the AWS side, and the free Microsoft Learn study guide plus a free Azure account on the Azure side. The real “cost” of both is the years of hands-on architecture experience they assume, which dwarfs any exam fee. Renewal carries no fee on either platform.
Difficulty and time
Both are expert-level and assume real experience, but they differ in shape.
- AWS SA Professional is 75 questions in 180 minutes, passing at 750/1000. AWS recommends two or more years of hands-on experience designing and deploying on AWS. The questions are long, scenario-heavy and frequently have several plausible answers, which is why it is regarded as one of the harder AWS exams; with Associate-level knowledge and real experience, candidates often plan a couple of months of focused study, considerably longer without that base.
- AZ-305 is around 40-60 questions in about 120 minutes, passing at 700/1000, including case studies. Microsoft assumes AZ-104-level administrator knowledge and solid Azure experience; with that base, many candidates spend a couple of months of focused study.
Both are demanding senior exams. The AWS Professional stands out for its length and the depth of its scenarios across 180 minutes, while AZ-305 packs expert-level design judgement into a shorter case-study format. Confirm the current skills-measured list on Microsoft Learn and the current exam guide on the AWS side before you book.
Ecosystem and job market
Job postings mirror the platform split.
- AWS has the largest overall public-cloud market share, and the SA Professional is among the most respected senior cloud certifications, especially at startups, AWS-first companies and across much of the global tech market. It is the more portable senior credential.
- Azure is the default in many large enterprises, the public sector, and a large share of German, Austrian and Swiss companies already running Microsoft 365 and Windows Server. In those markets the Solutions Architect Expert maps directly onto senior design roles and the postings.
Demand for senior cloud architects exists everywhere, but in different proportions by region and industry. Look at the actual employers you are targeting and follow their stack.
Career outcomes
- AWS SA Professional maps to: senior solutions architect and cloud architect roles, particularly for those designing complex, multi-account environments and large migrations. Specialty certifications (security, networking, data) go deeper from here.
- AZ-305 maps to: cloud and solutions architect roles in Azure-using organisations, often as the step up for administrators moving into architecture. Specialty certifications such as AZ-500 (security) go deeper from here.
Pay tracks seniority, role and market rather than the badge; both are top-tier architecture credentials in a similar senior band. Multi-cloud literacy is valued at this level, so some architects hold both, but going deep on one platform first is the usual route.
How to decide
Choose by platform first, because that decides more than any feature.
- You architect on AWS, or want the single most portable senior cloud credential → AWS Solutions Architect Professional.
- You design on Azure, or work in a Microsoft-centric organisation or region (common across DACH and Europe) → AZ-305.
- You have no preference at all → AWS is the safer default on market size and portability; AZ-305 is the better bet in a Microsoft-heavy context, and is the cheaper sitting.
Whichever you pick, neither is a starting point: both assume real experience, so build the associate or administrator foundation and hands-on design work first. The architectural judgement transfers between clouds, so the second platform is faster later, and at this level it is your track record of real designs that turns the interview into an offer.