If you are searching "types of ERP" it is because you need to pick one, or because you have outgrown the one you already run. Before you compare brands, decide the category: horizontal or industry-specific, cloud or on-premise, standard or custom. Each axis changes the price, the rollout time and how well the system fits your actual business. Here are the three classifications, the ERPs most used in Spain in 2026, and one thing almost nobody tells you: in most cases you do not need to switch ERP, you need to connect it better.
What is an ERP, in one sentence?
An ERP (Enterprise Resource Planning system) is software that centralizes accounting, invoicing, purchasing, stock and, depending on the module, sales or production, in a single shared database. Instead of running accounting in one program, the warehouse in a spreadsheet and sales through email, everything lives in one place and updates in real time.
That definition holds for any ERP on the market, but very different products fit inside it. An ERP for a 5-person accounting firm and one for a 200-employee factory share the name and little else. That is why the first step is understanding the types, not the brands.
ERP types by scope: horizontal or industry-specific (vertical)?
A horizontal ERP covers processes common to any company: accounting, invoicing, purchasing and HR. Sage, Holded and A3 were built this way, designed to serve accounting firms, retailers, professional services and small manufacturers with the same base. Their advantage is cost and maturity: they have spent years polishing what is generic.
A vertical or industry-specific ERP adds logic unique to one sector: batch tracking and cost breakdowns in food production, traceability in pharma, project and site management in construction, routing and fleet management in logistics. Some vendors offer their own verticals (Sage has construction-focused versions, for instance); others leave that gap for integrators to fill.
The question that settles this is not "what sector am I in", it is "is my core process the same as any SME's, or does it have a piece no generic ERP handles well?". If it is the latter, you almost never need a full vertical ERP: usually a custom module on top of the horizontal ERP you already run is enough, costing 1,500 to 8,000 EUR against migrating to an entire new system.
Cloud or on-premise?
A cloud ERP (SaaS) is paid by subscription, runs on the vendor's servers and updates itself. Holded, Sage Cloud and Dynamics 365 work this way. Advantages: no server to maintain, access from anywhere, low upfront cost. Real risk: you depend on the vendor for everything, including price increases and feature changes you do not control.
An on-premise ERP is installed on your own servers. It is the classic model behind SAP Business One or A3's desktop version, though today almost every vendor also offers a cloud version of the same product. It gives more control over data and deep customization, in exchange for server maintenance being your responsibility, or that of whoever you hire for it.
In 2026, for a Spanish SME without special regulatory needs, cloud usually wins on cost and simplicity. The exception is sectors with strict data residency requirements or heavy integrations with shop-floor machinery, where on-premise or hybrid still makes sense.
Standard or custom?
A standard ERP (Sage, Holded, Odoo, A3, SAP Business One, Dynamics 365) covers 80 percent of a typical company's processes with a fast rollout and a cost known in advance. It is the default choice and, for most businesses, the correct one.
A custom ERP is built from scratch to fit your processes exactly, without forcing anything. It makes sense when your core process is your competitive edge and no standard package covers it without contortions, or when you pay per-user licences and with 40 or more employees the annual fee exceeds what amortising your own build over 3 or 4 years would cost. In Spain, a full custom ERP starts at 15,000 EUR and usually takes 2 to 4 months.
Between those two extremes sits a third path that covers most real cases: a standard ERP with custom modules on top for the 20 percent of processes that really are unique to your business. It is cheaper, faster, and does not force you to migrate data or retrain your whole team.
Which ERPs are most used in Spain in 2026?
Sage is one of the horizontal ERPs with the widest footprint among Spanish SMEs and accounting firms, with versions ranging from basic bookkeeping to fuller ERP suites for mid-sized companies. Holded is a cloud ERP platform born in Spain, popular among SMEs and freelancers for its simple interface and fully SaaS model.
Odoo is a modular, open-source ERP with a very broad app ecosystem (sales, inventory, manufacturing, HR) that can run in the cloud or on your own server and supports deep customization. A3 (Wolters Kluwer) has a strong presence among Spanish accounting and tax firms, focused on bookkeeping, payroll and tax filing.
SAP Business One is SAP's option designed for SMEs and mid-sized companies that want the robustness of the SAP ecosystem without the cost of the full corporate version, common in manufacturing and distribution with meaningful volume. Microsoft Dynamics 365 combines ERP and CRM on one platform, with native integration with Excel, Outlook and Power BI, and tends to show up in companies already running the rest of the Microsoft stack.
No ERP software on this list is "the best" in the abstract. The best ERP is the one that fits your size, your sector and your current systems; the rest is cost and complexity you do not need.
When should you NOT switch ERP?
When the problem is not the ERP itself, but that it does not talk to the rest of your systems. This is the most common situation we see: an SME running Sage, Holded or A3 perfectly well for accounting and invoicing, but with the CRM, the online store or email disconnected, so someone re-types the same data by hand every day.
Migrating ERP to fix that is like moving house because a socket is missing. ERP and CRM integration connects the systems you already have through their APIs, without touching your data or how you work, and costs between 1,500 and 4,000 EUR against the 15,000 EUR or more that a full migration to another system starts at.
It also does not make sense to switch ERP if the gap is one specific module: a customer order portal, a warehouse app with a barcode scanner, or digital work orders. That is solved with a custom module connected through an API, for 1,500-8,000 EUR and in 3-6 weeks, without migrating a single record from the ERP you already run.
How much does each option cost in 2026?
To orient you with real figures from the Spanish market: a custom module on an existing ERP (Sage, Holded, Odoo, A3) costs between 1,500 and 8,000 EUR, depending on how many processes it covers. An integration between your ERP and other systems, CRM, online store or email, runs between 1,500 and 4,000 EUR. A full custom ERP, built from scratch, starts at 15,000 EUR.
Before choosing between a standard ERP, an industry-specific one or a custom build, it is worth comparing total cost over several years, not just the initial licence. We have published the full breakdown, with 3- and 5-year TCO figures, in our comparison of custom ERP versus SaaS and in our guide on how much a custom ERP costs in 2026.
If you are not sure where to start, our technical audit costs 190 EUR, with an initial diagnosis within 72 hours and a full report within 5 working days. The report tells you what your current ERP covers, what is missing and what each option would cost, with fixed figures. If you then hire us for the project, that 190 EUR is deducted from the budget.
Frequently asked questions about ERP types
What types of ERP exist?
ERPs are classified along three independent axes: scope (horizontal, for any company, or industry-specific/vertical, with logic for one sector), deployment (cloud/SaaS or on-premise), and origin (standard, ready to use, or custom, built from scratch). A given ERP combines one option from each axis; Holded, for example, is horizontal, cloud and standard.
Which ERPs are most used in Spain in 2026?
Among horizontal ERPs with the widest footprint in SMEs, Sage, Holded, Odoo and A3 (Wolters Kluwer) stand out, especially among accounting firms, retailers and service businesses. For mid-sized companies with higher volume or manufacturing and distribution processes, SAP Business One and Microsoft Dynamics 365 are common thanks to their robustness and integration with other corporate systems.
Which ERP is best for a small SME?
There is no single best ERP in the abstract, it depends on size and sector. For fewer than 15 users without very specific processes, a horizontal cloud ERP like Holded or Sage is usually enough and cheaper to roll out. If a process shows up that the standard ERP does not cover well, a custom module (1,500-8,000 EUR) almost always pays off more than switching the entire system.
When does a custom ERP make more sense than a standard one?
When your core process is your competitive edge and no standard ERP fits it without heavy workarounds, when per-user licences inflate cost with 40 or more employees, or when you depend on an unsupported legacy system and migrating to a standard package would force you to rebuild every process anyway. A full custom ERP starts at 15,000 EUR and takes 2 to 4 months.
Is it better to integrate my current ERP or migrate to another one?
In most cases, integrating is more cost-effective. If your current ERP handles accounting and invoicing well but does not talk to your CRM or online store, an integration costs between 1,500 and 4,000 EUR and is delivered in weeks, versus a full migration that can exceed 15,000 EUR and several months of rollout with a real risk of data loss.
