Magento Open Source vs Adobe Commerce in 2026: The Cost Drivers Nobody Puts in the Proposal

Nearly every Magento Open Source vs Adobe Commerce proposal I have read does the same thing. It puts a licence fee in one column, a zero in the other, adds hosting, and calls that a cost comparison. It is a tidy slide and it is close to useless, because the numbers that actually move a five-year total live somewhere else entirely.

I want to walk through the ones that keep showing up in real projects and almost never show up in the proposal. Some of them are large enough to flip the answer completely.

Before anything else, a framing note. The Magento Open Source vs Adobe Commerce decision is not really a features decision anymore. Both editions run the same core. Same checkout, same module architecture, same security patches, same release cadence. When 2.4.9 shipped in May 2026, it shipped for both. The split happens above the core, at the commercial feature layer and, more importantly, at the support layer. That second one is where the money is.

The starting numbers, and why they mislead

Adobe does not publish pricing. Every figure in circulation comes from partners and agencies aggregating what their clients were quoted, so precision here is false comfort. That said, the reported bands are consistent enough to plan against.

Now the part that gets skipped. Across the sources publishing total cost of ownership benchmarks, the licence consistently lands at somewhere between 20 and 40 percent of what a working store costs per year once you add hosting, development, extensions and maintenance. So a proposal that compares $0 against $60,000 is comparing two numbers that between them explain maybe a third of the actual spend.

The other two thirds is where Magento Open Source vs Adobe Commerce actually gets decided. Here is what lives there.

Cost driver one: extended support only exists for one edition

This is the big one, and it is the one I see missed most often.

Adobe gives every 2.4.x release line three years of standard support from general availability. Fine, both editions get that. What happens after is not symmetrical at all. Adobe's lifecycle policy adds a year of extended support at no extra cost for Commerce customers on 2.4.6 and 2.4.7, and then a one-time security-only transitional period on top for the older lines. Adobe's documentation is explicit that extended support is available to Adobe Commerce customers only and is not available for the Magento Open Source code base.

Put dates on it and the gap gets uncomfortable. Take 2.4.6, which reached the end of standard support on 11 August 2026:

An Open Source store on 2.4.6 ran out of road in August 2026. A licensed Commerce store on the identical codebase has patches until August 2027 and isolated security fixes until May 2028. Same code, nearly two years of difference. We wrote about how to work out which of those two situations you are in over in our breakdown of the 2.4.6 support deadline.

The cost consequence is not the patches themselves. It is upgrade frequency. If your Open Source store must move every three years and a Commerce store can stretch to four or five, you are running roughly one extra major upgrade per decade. Price a Magento major upgrade at whatever your last one cost, which for most mid-market stores with real customisation is not a small number, and put that in the Open Source column. It belongs there and it is almost never in the proposal.

Cost driver two: PHP end of life is your problem in both columns

Adobe is unambiguous about this and merchants routinely miss it. Adobe does not provide security or quality fixes for third-party dependencies that reach end of life while you are inside your support window. That covers PHP, MySQL, MariaDB, OpenSearch, Redis, Valkey and RabbitMQ.

PHP 8.1 reached end of life on 31 December 2025. PHP 8.2 reaches end of life on 31 December 2026. Adobe's own documentation flags both as PCI compliance risks for the release lines that use them, and notes that assessing PCI compliance is the merchant's responsibility, not Adobe's.

So you can be sitting on a version Adobe still supports, running a PHP version nobody supports, and be non-compliant. The dependency treadmill runs on its own schedule and it does not care which edition you licensed. Budget for it as a recurring line, not an occasional surprise.

Adobe Commerce on Cloud softens this because Adobe manages the infrastructure stack and the enforcement policy pushes you forward whether you like it or not. That is a genuine cost saving dressed up as a restriction. On Open Source, someone on your side owns that calendar. If nobody currently owns it, that is a role you are about to pay for.

Cost driver three: the extension stack you rent forever

The commercial features are the obvious difference. Adobe Commerce includes a native B2B suite with company accounts, shared catalogues, requisition lists and negotiated quotes. It includes content staging and scheduling, customer segmentation with dynamic blocks, Live Search and AI-driven product recommendations. Open Source does not.

The proposal usually handles this by listing extension prices. A B2B extension, a segmentation extension, a search service. Add up the annual licences, compare to the Adobe licence, done.

That arithmetic is wrong in a specific way. Extension licence fees are the small part. The real cost is compatibility work. Every extension in your stack is a dependency that has to be tested, and sometimes patched or replaced, at every core upgrade. A store running twenty-five third-party modules is not running twenty-five renewals, it is running twenty-five things that can each individually block an upgrade until someone fixes them.

I have watched upgrade timelines double because two extensions had not shipped compatibility for a new release line and the vendors were not in a hurry. On Adobe Commerce, that functionality sits in the core and moves when the core moves. You are not just buying features, you are buying the absence of a coordination problem.

The flip side, and it is a fair one: if you do not need B2B, do not pay for B2B. A DTC brand with a straightforward catalogue is buying nothing useful with that part of the licence. This is exactly why Magento Open Source vs Adobe Commerce has no universal answer.

Cost driver four: PCI scope and who is carrying it

Adobe Commerce on Cloud ships with PCI-compliant infrastructure, Fastly CDN, a WAF and managed patching. Self-hosted Open Source ships with none of that, which means your PCI scope, your assessment burden and your QSA conversation all get larger.

This rarely appears as a line item because it is not an invoice, it is a scope. But scope costs hours, and hours cost money, and a wider SAQ is a real annual expense for anyone taking card payments at volume. Ask whoever handles your compliance what the delta looks like before you assume self-hosting is cheaper.

Cost driver five: the roadmap gap

Adobe's stated recommended destination for Commerce customers is Adobe Commerce as a Cloud Service, its multi-tenant SaaS product where Adobe handles infrastructure, patching and version upgrades and the end-of-life cycle stops recurring. Adobe's lifecycle documentation names it as the recommended long-term path and describes upgrading a Cloud release as the alternative rather than the preference.

There is no Open Source path onto it.

That does not make Open Source a dead end. The community is active, Mage-OS exists as a genuine fork with its own release cadence, and plenty of stores will run happily on Open Source for years. But if your internal five-year plan quietly assumes you can move onto Adobe's managed future whenever you feel like it, that assumption has a migration project attached to it. Price it now or discover it later.

So which one is actually cheaper

Depends almost entirely on two things: how much custom code you carry, and whether you have someone who owns the platform.

Magento Open Source tends to win when you have in-house development capacity or a long-term agency relationship, your customisation is moderate, you are not running complex B2B, and your GMV does not make an Adobe licence a rounding error. Most stores under roughly $5 million GMV with a competent technical owner land here, and land here correctly.

Adobe Commerce tends to win when B2B is core to how you sell, when your merchandising team needs staging and segmentation without filing developer tickets, when your GMV makes the licence a small percentage of revenue, or when the honest answer to "who owns upgrades" is nobody. That last one is not a technical argument. It is an organisational one, and it is the most common real reason stores move up.

The bad outcome, and I see it regularly, is a store that chose Open Source to save the licence fee, never staffed the ownership role, and is now three release lines behind with no extended support to fall back on. That store did not save money. It deferred a cost and let it compound.

If you want a straight answer on which side of the Magento Open Source vs Adobe Commerce line your store belongs, the fastest route is to work out three things before you talk to anyone: your exact version and patch level, whether you hold a Commerce licence, and how many third-party extensions are in your composer file. Most of the decision falls out of those three numbers.

Not sure which edition your store should be on, or how far behind your current version has drifted? Our Magento development team handles version audits, upgrades and edition migrations for stores across the US, UK and Canada. Get in touch and we will tell you where you actually stand.

SOURCES:

• Adobe Commerce lifecycle policy: https://experienceleague.adobe.com/en/docs/commerce-operations/release/planning/lifecycle-policy

• Adobe security and compliance enforcement notice: https://experienceleague.adobe.com/en/docs/commerce-operations/release/planning/security-enforcement-policy

• PHP supported versions: https://www.php.net/supported-versions.php