Enterprise architecture software gives you one place to hold how your organisation's technology works today, how you want it to work and how you'll get there. You don't need a platform to begin, since a free modelling tool can prove the idea before you buy a full repository.
What goes in the repository
Strip away the vendor language and the job's simple. According to the NIST glossary, an enterprise architecture includes a baseline architecture, a target architecture and a sequencing plan. That's three things: where you are, where you're going, and in what order you'll get there.
Here's why that matters when you're buying. Most demos spend their time on the first of those, because a beautiful map of your current systems is easy to show. But the map's the least useful part if nobody ever acts on it. The sequencing plan is what makes the whole thing worth doing, and it's the part that dies first when nobody owns it. So when you watch a demo, ask to see how the tool moves from today's picture to tomorrow's, and who gets told what changes in which order.
It also tells you what to bring to the first meeting. If you can't name who'd maintain the baseline a year from now, no tool will fix that. The repository goes stale, people stop trusting it, and you've bought a very fancy diagram. Sort out the owner before you sort out the software.
There's a second question that's worth asking early: who's going to read this thing? Architects are happy with a detailed model. A finance lead or a head of operations won't open one, and they're usually the people whose decisions the plan depends on. So before you compare tools, write down two or three decisions the repository should help with next quarter, such as which system to retire first or which team a merger affects. Then judge every tool, free or commercial, by how quickly it gets you from the model to an answer that a non-architect can read in a meeting.
One free tool, six commercial platforms
This list splits simply. One entry's a free, open source modelling tool. The other six are commercial platforms. Each one below gets a short card, in no particular order, and the words come from the vendors themselves, so read them as claims.
Archi
Best for: Anyone starting out who wants to model in ArchiMate with an open source tool, on their own machine.
Ardoq
Best for: IT leaders tracking portfolios, tech debt and risk; the vendor pitches real-time insights.
Avolution ABACUS
Best for: Architects doing capability mapping and configurable modelling, with data-driven analysis and integrations on the vendor's list.
Bizzdesign
Best for: Organisations joining strategy, architecture and governance; the vendor calls its SaaS suite end-to-end for enterprise transformation.
Orbus iServer
Best for: Connecting strategy and execution with enterprise and business architecture on one platform, as the vendor describes it.
Planview Enterprise Architecture
Best for: Businesses already thinking in portfolios, since it comes from a wider portfolio-management vendor and focuses on technology plans.
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SAP LeanIX
Best for: SAP-minded enterprises; it now carries the SAP name and the vendor pitches AI, risk management and collaboration.
How they compare
| Tool | Kind | What the vendor emphasises |
|---|---|---|
| Archi | Free, open source | ArchiMate modelling |
| Ardoq | Commercial platform | IT portfolios, tech debt and risk |
| Avolution ABACUS | Commercial platform | Configurable modelling, capability mapping and data-driven analysis |
| Bizzdesign | Commercial platform | Strategy, architecture and governance in a SaaS suite |
| Orbus iServer | Commercial platform | Strategy, execution and enterprise architecture on one platform |
| Planview Enterprise Architecture | Commercial platform | Technology plans tied to capabilities and digital strategy |
| SAP LeanIX | Commercial platform | EA transformation with AI, risk management and collaboration |
Look at the words in that last column and you'll see the real differences. Ardoq and SAP LeanIX lean towards the IT estate, with portfolios, risk and tech debt. Bizzdesign and Orbus iServer lean towards linking architecture with strategy. Avolution ABACUS stresses configurable modelling and analysis. Planview Enterprise Architecture sits inside a bigger family of portfolio products, so its appeal partly depends on whether you already use that family.
None of these replaces the data work that feeds it. If your source systems are a mess, our list of data transformation tools deals with that separately, and this page is about the map itself. And if your real question is how to run AI across the organisation, our enterprise AI platforms guide is the better starting point. An EA repository can tell you where AI fits, but it won't run it for you.
My advice before anyone books a demo
If you're a single architect or a small team, don't start by buying a platform. Model one business capability and the systems behind it, for free, and show it to the people who'd use it. If they don't care about the result, a bigger tool won't make them care.
If that model gets used and people start asking for more, you've earned the commercial conversation. Then choose by the reader you're serving: an IT estate view for technology leaders, a strategy view for executives. If you're an SAP business, it's reasonable to shortlist the vendor carrying that name, but don't assume it's the only answer because of the logo. Ask each vendor to load a sample of your own data, and don't accept a demo that only uses theirs.
Do you make enterprise architecture tools? Tool makers can ask about a featured place on this page.
A four-step way to start free with Archi
- Download it and pick one capability that matters right now, not the whole organisation.
- Model the baseline: the systems and teams that support that capability today.
- Add the target and a plain sequencing plan: what changes first, second and third.
- Show it to the owner, and only look at platforms once they've asked for the next one.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
EA software questions, briefly
What is enterprise architecture software used for?
It holds a shared model of an organisation's current technology, its intended future state and the plan between them, so that people can make change decisions from the same picture.
Is there free enterprise architecture software?
Yes. There's an open source modelling tool on this list that works with the ArchiMate language. It's a good way to test whether your organisation will use a model before you buy a platform.
What is ArchiMate?
It's a modelling language for enterprise architecture, and it's what the free tool on this list uses. If you might move to a platform later, ask each vendor how models get in and out.
