Search Azure Sentinel vs AWS Security Hub and you get a feature grid: two columns, rows of ticks, and a verdict that reads like a coin toss. The reverse phrasing, AWS Security Hub vs Azure Sentinel, returns the same grids and the same non-answer. Neither tells a seed-stage team the thing it actually needs, which is not which product is better but which one to switch on first, this week, with no security hire and a cloud bill you already watch too closely.
The grids fail for one reason, and it is the most useful sentence on this page: these two products are not competitors. They are not even in the same category. AWS Security Hub is a posture and findings product. Microsoft Sentinel is a SIEM, billed by the gigabyte. Comparing them tick for tick is like comparing a smoke alarm to a fire investigation unit. Both concern fire. Only one is what you install first.
This is for the founder or first engineer at a five to thirty person startup deciding what to enable now. Every number links to the vendor's own pricing or documentation, and every judgement call is labelled as opinion.
Azure Sentinel vs AWS Security Hub: the short answer for a seed-stage team
If you run on AWS, turn on AWS Security Hub CSPM plus GuardDuty. If you run on Azure, turn on the free Foundational CSPM tier of Microsoft Defender for Cloud and leave Sentinel off until something concrete forces it. That is the answer for most teams under thirty people.
The decision rule, in three lines:
- You want to know whether your infrastructure is configured safely. That is posture management. Security Hub on AWS, Defender for Cloud on Azure. Sentinel does not do this job.
- An auditor or an enterprise customer is demanding centralised, retained, queryable logs. That is a SIEM, and it is the only honest reason to buy Sentinel this early.
- You want both but have nobody to operate a SIEM. Posture first. A SIEM nobody queries is a bill, not a control.
| The buyer decision | AWS Security Hub | Microsoft Sentinel |
|---|
| Product category | Posture plus findings aggregation | SIEM: ingestion and correlation |
| Question it answers | Is my cloud configured safely right now | What happened across my logs, and when |
| How you are billed | Per security check and per finding ingested | Per gigabyte of logs ingested |
| Cost at a small footprint | Cents per check, first 10,000 finding events free | Tracks log volume; no commitment tier below 100 GB per day |
| Does it need an operator | No. Review findings weekly | Yes. Someone must write and tune queries |
| Seed-stage verdict | Turn it on now | Defer until a mandate arrives |
Takeaway: this is not a head-to-head purchase. One is a baseline you should already have, the other a later, staffed commitment.
Why the product names make this comparison harder than it should be
Part of the confusion is Microsoft's own naming history, and it is worth clearing up because it changes what you are comparing. A large share of people still search Azure Security Center vs AWS Security Hub, and AWS Security Hub vs Azure Security Center is the same query typed the other way round. Azure Security Center no longer exists under that name. At Ignite in November 2021 Microsoft renamed Azure Security Center and Azure Defender to Microsoft Defender for Cloud, and Azure Sentinel became Microsoft Sentinel in the same wave.
That matters because the old name points at the right product. If you came looking for Azure Security Center, you wanted posture management, and its successor, Defender for Cloud, is the true counterpart to AWS Security Hub. Sentinel is the SIEM above it. So the comparison most people mean to run is Defender for Cloud against Security Hub, and the one they type is Sentinel against Security Hub.
One more change is in flight. Microsoft is moving Sentinel management into the unified Defender portal and has extended the Azure portal sunset to 31 March 2027, out from an earlier target of 1 July 2026. Log Analytics workspaces stay the data store and billing boundary. Anything you build now should assume the Defender portal.
Takeaway: if your search started with Azure Security Center, the product you want is Defender for Cloud, and it has a free tier.
1. What each product actually is, in one line
Four products get dragged into this comparison. Here is each one, reduced to its job.
- AWS Security Hub CSPM runs configuration checks against standards such as the CIS AWS Foundations Benchmark and collects findings from other AWS security services into one view.
- AWS Security Hub, the broader service that reached general availability after re:Inforce 2025, correlates GuardDuty, Inspector, Security Hub CSPM and Macie into a risk-prioritised view.
- Microsoft Sentinel is a SIEM. It ingests and correlates logs and supports hunting and response, billed on the volume you feed it.
- Microsoft Defender for Cloud is Azure's posture and workload protection product, and its foundational tier assesses Azure, AWS and Google Cloud.
The asymmetry is the point. Three of the four are posture products. One is a SIEM. Naive comparisons mislead because all four eventually tick the words "detects threats", so a grid makes them look interchangeable. They are not, in what they optimise for, what they cost, or how much of your week they consume.
Takeaway: name the category you need before comparing products. Most seed-stage teams need posture management and native threat detection, which removes the SIEM from the shortlist.
2. AWS Security Hub: what a small footprint actually pays
Security Hub CSPM bills per unit of work rather than per seat or per gigabyte, which suits a small estate. Per the published CSPM pricing, security checks run at $0.0010 each for the first 100,000 per account per region per month, $0.0008 for the next 400,000, and $0.0005 beyond 500,000. Finding ingestion is free for the first 10,000 events per account per region each month and $0.00003 per event after that, and findings generated by Security Hub's own checks never carry an ingestion charge.
On a seed-stage footprint the posture layer is close to a rounding error on an AWS bill. The newer resource-based model for the broader Security Hub is priced per resource unit per month instead, so check which model your account is on before you forecast.
The line that grows is threat detection. GuardDuty bills on data analysed: VPC flow log and DNS query log analysis starts at $1.00 per GB for the first 500 GB in a month, then $0.50, then $0.25, with CloudTrail events and the S3, EKS and malware features metered separately. For a quiet early-stage account that is small, and it scales with traffic. If you already track data transfer, the same instinct applies to cloud egress costs.
Takeaway: on AWS the posture floor is cheap enough to enable today. Watch GuardDuty log volume as traffic grows, not the Security Hub line.
3. Microsoft Sentinel: the commitment tiers start far above you
Sentinel is billed primarily on the volume of data you ingest for analysis, and there are two ways to pay: pay-as-you-go per gigabyte, or a commitment tier where you reserve daily capacity for a lower effective rate. Per-gigabyte rates vary by region, so the live Sentinel pricing page is the only figure worth quoting back to a CFO.
Here is the structural fact that decides this for a small team, and the feature grids never mention it. The commitment tiers listed on that page begin at 100 GB per day and run to 50,000 GB per day. A fifteen person startup does not generate 100 GB of security logs a day. It generates a few. So a seed-stage team cannot reach any commitment tier, pays the highest pay-as-you-go rate per gigabyte, and carries a bill that moves with how noisy its logs were that month.
There is a real on-ramp: new workspaces can ingest up to 10 GB per day free for the first 31 days, subject to a workspace limit per tenant. Enough for a genuine evaluation without committing budget.
Practitioner opinion: the failure I see most is a team pointing every log source at a SIEM with no filtering, then finding a security bill larger than the compute it protects. Decide what you are NOT ingesting before you connect anything.
Takeaway: Sentinel's pricing is built for volumes you do not have yet. Use the 31-day trial, and defer the spend until a mandate justifies it.
4. The Azure answer most comparisons miss: Defender for Cloud
On Azure the product that answers the Security Hub question is not Sentinel. It is Defender for Cloud, and the part you need is free. Microsoft's foundational CSPM capabilities are offered at no cost and include continuous assessment, security recommendations, Secure Score and the Microsoft cloud security benchmark across Azure, AWS and Google Cloud, plus asset inventory and compliance visibility. There is an opt-in path documented for turning it on.
That single fact reframes the comparison. An Azure team asking "Sentinel or Security Hub" is weighing a metered SIEM against a posture product while a free posture tool sits unused in its own console. The paid step up, Defender CSPM, adds agentless vulnerability scanning, attack path analysis and the cloud security graph, and is billed per billable resource counted across servers, storage accounts, databases and serverless resources. Treat that as a deliberate, budgeted upgrade rather than a default.
For multi-cloud teams: because foundational CSPM assesses AWS and Google Cloud too, Defender for Cloud can be a single posture pane across clouds with no SIEM involved. Practitioner opinion: I still keep each cloud's native tool and resist wiring a small team has to maintain.
Takeaway: on Azure, enable Foundational CSPM today. It costs nothing and it is the real counterpart to AWS Security Hub.
5. Where GCP Security Command Center fits
Google's equivalent has the sharpest cliff of the three. Security Command Center ships in three tiers: Standard, Premium and Enterprise. Standard is free, and it gives Security Health Analytics for common misconfiguration detection plus asset and IAM visibility. For a seed-stage GCP project that is close to a reflex: zero cost, and it catches the mistakes that cause early breaches.
Then the step is steep. Premium adds richer threat detection, attack path analysis and compliance reporting, and per the published pricing it is available pay-as-you-go, at rates that vary by service and by whether you activate at organisation or project level, or as a fixed-price subscription whose minimum annual cost is $15,000. Enterprise, which folds in the Google SecOps SIEM and SOAR, is priced for organisations, not startups.
All three clouds now give you a free or near-free posture floor and charge properly for the layer above. The free floor is not a trial. It is the tier a seed-stage team is supposed to live on.
Takeaway: on GCP, turn on SCC Standard now. Treat Premium as a budgeted decision, not an automatic upgrade.
6. What breaks if you pick the wrong one
Picking wrong rarely causes a breach by itself. It wastes money, or leaves a gap you believe is covered. Four failure modes, in the order I see them:
- You buy the SIEM and keep the posture gap. Sentinel ingests what you send it. It does not tell you a bucket is public or a role is over-permissioned, so teams that start here often still carry the misconfiguration a free check would have caught.
- You buy the SIEM and nobody queries it. Per-gigabyte ingestion continues whether or not a human opens the console. The most expensive version of feeling secure.
- You assume Security Hub satisfies a log retention requirement. It aggregates findings. It is not a retained, queryable log store, so posture tooling does not close that audit item.
- You enable nothing because the pricing pages looked enterprise-shaped. The most common outcome, and the only one with real security consequences. The free tiers exist for you.
The fourth is the one this comparison usually causes: someone sets out to choose, finds pricing written for enterprises, and closes the tab with nothing enabled. Enabling the free floor beats a perfect decision you never make.
Takeaway: the expensive mistake is a SIEM nobody runs. The dangerous one is enabling nothing while you decide.
7. The compliance trigger that makes a SIEM the right buy
There is a point where Sentinel stops being premature, and it is almost always a document rather than a threat. A SOC 2 audit scope, a PCI DSS requirement or an enterprise security questionnaire asks for centralised log collection, defined retention, and the ability to investigate an event after the fact. Posture tooling does not answer that. A SIEM does.
If that is your trigger, two things change. The cost is now attached to revenue or to an audit you have committed to, and the requirement itself tells you how much to ingest. Scope it to the sources the requirement names rather than connecting everything. Practitioner opinion: a scoped log retention setup often satisfies the control without a full SIEM, so read the requirement closely first.
Heading into that territory, the groundwork matters more than the tool: our notes on SOC 2 Type 1 against Type 2 cover what evidence each demands, and the most missed PCI DSS 4 requirements cover the logging clauses teams discover late.
Takeaway: let the auditor or the contract trigger the SIEM, and let the named sources set the scope. Budget for the operator, not just the licence.
8. What to turn on this week
Whatever you conclude about the longer-term tooling, there is a short list that is free or near free on every cloud and that closes the gaps most likely to hurt an early-stage team.
- Posture management at the lowest tier your cloud offers. Security Hub CSPM with the CIS benchmark on AWS, Foundational CSPM in Defender for Cloud on Azure, SCC Standard on GCP.
- Native threat detection in the production account. GuardDuty on AWS or its equivalent. The classic early-stage compromise is a leaked key mining cryptocurrency, and these services catch exactly that.
- Route findings to a human on a schedule. A weekly fifteen minute review beats a console nobody opens.
- Close public exposure of storage and databases. The control that catches the most real incidents at this stage. Our walkthrough of S3 Block Public Access covers the AWS side.
- Audit over-permissioned roles once. Start from the findings your posture tool already produced, as in these notes on IAM Access Analyzer findings.
None of that needs a SIEM, a security hire, or a five-figure commitment, and it removes most of the early-stage risk.
Takeaway: enable the free posture tier and native threat detection, give findings an owner, and close public storage exposure.
The full comparison table
| Product | Category | How it is billed | Free tier | Seed-stage verdict |
|---|
| AWS Security Hub CSPM | Posture plus findings aggregation | Per check from $0.0010; per finding beyond 10,000 free events | No, but very low at small scale | Right default on AWS |
| Amazon GuardDuty | Threat detection | Per GB of logs analysed, from $1.00 for the first 500 GB | No, trial only | Pair it with Security Hub CSPM |
| Microsoft Defender for Cloud | Posture, multi-cloud | Foundational CSPM free; Defender CSPM per billable resource | Yes, Foundational CSPM | Right default on Azure |
| Microsoft Sentinel | SIEM | Per GB ingested; commitment tiers start at 100 GB per day | 10 GB per day for 31 days on new workspaces | Defer until an audit or customer requires it |
| GCP Security Command Center | Posture and threat findings; SIEM at Enterprise | Standard free; Premium from $15,000 a year on subscription | Yes, Standard | Turn on Standard today |
The stage-specific recommendation
Pre-seed, single cloud. Enable your provider's free or lowest posture tier plus native threat detection, and stop. Security Hub CSPM with GuardDuty on AWS, Foundational CSPM on Azure, SCC Standard on GCP. Do not buy a SIEM. Security value per dollar is highest here and falls fast as you add tools nobody operates.
Seed, with a first enterprise customer. Keep the posture tooling. Let the customer's questionnaire, not a vendor pitch, tell you whether centralised logging is required yet, and scope ingestion to what it names.
Seed to Series A, multi-cloud or entering SOC 2 or PCI DSS. This is where a SIEM earns its cost. Choose Sentinel if you are Azure-centric or need broad cross-source ingestion, or SCC Enterprise if you are GCP-centric and want the bundled SecOps stack. Budget for the person who runs it, because an unstaffed SIEM is money spent on a dashboard.
If you want a second opinion on your setup
MatrixGard runs a free 20-minute cloud security review for early-stage founders, funded or bootstrapped. Which posture tool fits your stack, what to turn on this week, and the misconfigurations most likely to bite you. No NDA needed for the first conversation. Send a note.
Avinash S is the founder of MatrixGard. Fractional DevSecOps for early-stage startups, funded or bootstrapped across India, the GCC, the UK, and the US. Almost a decade of building, breaking, and securing cloud infrastructure on AWS, GCP, and Azure.
Methodology note. Pricing and capability claims are taken from vendor pages current as of October 2026: AWS Security Hub CSPM pricing, AWS Security Hub pricing, Amazon GuardDuty pricing, the Microsoft Sentinel billing documentation and Sentinel pricing page, Microsoft Defender for Cloud CSPM documentation and Defender for Cloud pricing, and the Security Command Center service tiers and pricing pages. Per-gigabyte and per-check rates vary by region and activation level, so treat every figure as directional and confirm it against the live pricing page before committing budget. Category framing, the cost-shape analysis and the stage recommendations are practitioner opinion from operating these products on real workloads, not a vendor-published standard. This post is engineering guidance, not a formal assessment of your environment.
