If you're trying to choose an ERP for a small business in Spain, you've probably spent weeks juggling demos, spreadsheets and conflicting opinions. Some say Odoo is the standard, others that Dolibarr is lighter, that ERPNext is very complete, that FacturaScripts is simple… but nobody explains what that means for your business, today and three years from now.
Meanwhile, you're still running on Excel, bare-bones invoicing software and manual processes that eat up your team's time. You know you need to make the move, but you're worried about getting it wrong and ending up with an ERP that forces you to change the way you work, or one so rigid it holds back the company's growth.
In this guide we compare Odoo, Dolibarr, ERPNext and FacturaScripts from the point of view of a Spanish SME: invoicing, inventory, purchasing, Verifactu (Spain's new invoicing compliance system), CRM, HR and warehouse. You won't find an endless list of modules, but practical criteria and examples so you can decide with more confidence whether one of these open-source ERPs is right for you… and when a custom implementation makes sense.
1. Before comparing ERPs: what your SME really needs
The most common mistake when choosing an ERP for a small business is comparing features instead of processes. In other words: looking at what the software does before you're clear about what it has to solve in your company.
Before you think about Odoo, Dolibarr, ERPNext or FacturaScripts, spend a few hours mapping how your team works today and where time or money is being lost. At a minimum, write down:
- How you win and manage customers (CRM, quotes, sales follow-up).
- How you invoice and track incoming and outgoing payments (including Verifactu and your bank connection).
- How you manage inventory, purchasing and the warehouse (multiple warehouses? barcodes? picking?).
- Which HR functions you need (time tracking, leave, payroll, employee portal).
- Which tools you use today (Excel, invoicing software, ecommerce, POS, etc.) and what you'd like to bring together.
With that map, the question is no longer "which ERP is best?" but: which ERP fits the way I work best, without making me throw away everything that already works? That's also the mindset we bring at Interconecta when we implement Odoo, Dolibarr, ERPNext or FacturaScripts: the tool adapts to your operations, not the other way around.
2. Key criteria for choosing an ERP system for an SME (beyond price)
The license or implementation price matters, but it's only part of the real cost. When choosing an ERP for a small business, you also need to look at hidden costs and how well the system can grow with you. We suggest these criteria:
- Minimum functional coverage: invoicing, purchasing, inventory, CRM, basic reports, and Verifactu ready or easy to add.
- Ease of customization: you can adapt screens, workflows and fields without rebuilding the whole ERP.
- Integrations and APIs: connection to your ecommerce store, banks, payment gateways, shipping carriers, etc.
- Community and ecosystem: how many modules there are, how often it's updated, how much real documentation exists.
- Code ownership and freedom: avoid captive licenses and avoid your business depending on a single vendor.
- Support and guidance: who helps you implement, migrate data, train the team and maintain the system over time.
All four ERPs we compare are open source, which makes it easier for the code to be yours and to avoid vendor lock-in. Even so, the difference isn't just the software but how it's implemented: generic templates vs. a project adapted to your processes, with a team that understands your business.
3. Odoo: the modular ERP for SMEs that want to grow (and keep the project under control)
Odoo is probably the best-known open-source ERP. Its strength is its modular approach: you can start with a few modules (Sales, Invoicing, Inventory, CRM) and add Manufacturing, HR, Projects, Helpdesk and more over time. It's powerful, but that power demands a careful implementation.
In a typical Spanish SME, Odoo is a good fit when you want end-to-end integrated processes: from the sales lead in the CRM to the invoice, the payment and real-time inventory, including purchasing, light manufacturing and a warehouse with barcode picking.
- Odoo pros for SMEs:
- - Very broad functional coverage (sales, purchasing, inventory, accounting, HR, projects…).
- - Official and community modules for almost any need.
- - Good options for customization and custom development on its framework.
- - Ideal when you want to bring CRM, ERP, warehouse management (WMS) and HR together on one platform.
- Common drawbacks:
- - More complex to implement than lighter ERPs: if it isn't designed well, it can end up "oversized."
- - It requires a serious upfront analysis so you don't end up with a system full of modules you never use.
- - Setting up Spanish accounting, Verifactu and local tax rules requires local experience.
At Interconecta we work with Odoo when an SME needs a complete ecosystem: CRM integrated with the ERP, invoicing, inventory, purchasing, HR with an employee portal and a WMS with barcode picking and multiple locations. We always start with a free process analysis and a fixed scope delivered in 2-week sprints, so you see working demos from the start instead of an all-or-nothing reveal at the end of the project.
4. Dolibarr: a light, simple ERP for SMEs that want order without complications
Dolibarr is an open-source ERP/CRM that's lighter and simpler than Odoo. It's usually a good fit for service businesses, sales companies, small distributors or businesses coming from Excel and standalone programs that want to get organized without taking on a giant project.
Its interface is less sophisticated, but that isn't necessarily a bad thing: many SMEs appreciate a system that doesn't overwhelm the team and that can be up and running with the basics in a few weeks if the project is well planned.
- Dolibarr pros for SMEs:
- - Gentler learning curve for non-technical users.
- - Enough functionality for many SMEs: quotes, orders, invoices, basic inventory, projects, simple HR.
- - Well suited to centralizing CRM + invoicing + purchasing in a single system.
- - Less risk of "overloading" the tool with features you don't need.
- Typical limitations:
- - Less powerful for complex logistics, advanced manufacturing or very granular multi-warehouse setups.
- - Smaller module ecosystem than Odoo (although it grows every year).
- - For deep customization, you still need an experienced technical team.
We choose Dolibarr for projects where the priority is getting operations in order and gaining visibility without demanding hyper-complex processes. For example, companies that need to know clearly who ordered what, what has been invoiced, what's still to be collected and how projects are going, without building a technological "mothership."
5. ERPNext: a complete, integrated ERP for process-driven SMEs
ERPNext is a very complete open-source ERP with a carefully designed business-process philosophy. It brings sales, purchasing, inventory, manufacturing, projects, accounting and HR together in a single, well-designed core, which makes it especially interesting for SMEs with several departments that already work but need to be better integrated.
It tends to suit industrial companies, distributors with some complexity, technical service firms or SMEs that want unified dashboards and business intelligence straight from the ERP, without depending on countless spreadsheets.
- ERPNext pros for SMEs:
- - Very solid coverage for manufacturing, maintenance and projects.
- - A good data model for building reports and dashboards from ERP data.
- - A clean structure for integrating custom web applications, customer portals and mobile apps.
- Drawbacks to consider:
- - Less known in Spain than Odoo or FacturaScripts: you need a partner who knows it well.
- - Spanish localization (tax rules, Verifactu, etc.) may require extra work.
- - It's not the ideal ERP if all you want is invoicing and little else; you'd be deploying more "machinery" than you need.
At Interconecta we usually recommend ERPNext when the client already has a clear end-to-end process vision and knows they'll need to use the data in management dashboards, customer portals and internal applications. We use its API to connect online stores, banks (PSD2) and other systems, avoiding double data entry from day one.
6. FacturaScripts: the natural step up from simple invoicing to ERP
FacturaScripts started as invoicing software and has grown into a lightweight ERP that's widely used in Spain. It's an interesting option if you're coming from simple invoicing programs and want to take the next step without jumping straight into a management monster.
Its strengths are invoicing, Spanish taxes and ease of use. From there, with plugins and custom development, you can extend it to inventory management, purchasing, POS and some CRM features.
- FacturaScripts pros for SMEs:
- - Very close to how Spanish SMEs actually handle invoicing and taxes.
- - Ideal as a "first ERP" when you've only used basic invoicing software or Excel so far.
- - A plugin ecosystem that reasonably covers sales, purchasing, inventory and ecommerce.
- Limitations worth knowing:
- - Less geared to complex processes (manufacturing, advanced HR, powerful warehouse management…).
- - If you expect strong growth in areas not covered by existing plugins, you'll need more custom development.
- - Not the best option if you need complex CRM, full HR or deep integration with many systems from the start.
From our experience on real projects, FacturaScripts works very well for SMEs that want to get invoicing, purchasing and inventory in order and don't have particularly complex logistics or HR. If the business is growing quickly in processes, it's key to design an architecture from the start that lets you integrate other applications and APIs without rebuilding everything later.
7. Quick ERP comparison: which ERP fits which kind of SME?
There's no single answer, but there are patterns that repeat. In a nutshell, here's a quick guide to choosing an ERP for a small business depending on where you are:
- If your priority is bringing CRM + ERP + HR + warehouse together in a powerful, scalable system:
- - Look at Odoo or ERPNext first, with a project clearly scoped in phases.
- If you're coming from Excel and standalone tools and want order without a mega-implementation:
- - Dolibarr or FacturaScripts can be a good starting point, with gradual customization.
- If logistics and the warehouse are critical (picking, multiple locations, carriers):
- - Odoo and ERPNext usually provide a better foundation for a barcode-based WMS.
- If Spanish invoicing and ease of use matter most:
- - FacturaScripts and Dolibarr have the edge, as long as your processes aren't very complex.
- If your goal is tightly integrated business intelligence and customer portals:
- - Odoo or ERPNext, connected to dashboards and custom applications, will give you more room to grow.
The key isn't "which ERP is best," but "which ERP, properly implemented, lets you work the way you want today and keep growing without starting over three years from now."
At Interconecta we run a free process analysis and assessment to help you work this out with your own data and situations: mapping how your team works, identifying which ERP components you really need and designing a realistic roadmap, with a fixed timeline and budget before development starts.
8. What to consider for the implementation: integration, automation and support
Even the best ERP falls short if it isn't integrated with the rest of your ecosystem. When choosing an ERP for a small business, make sure these layers are planned from the start:
- Integration with your ecommerce store and POS: inventory, products, orders and customers should sync with the ERP in real time to avoid errors and double entry.
- Connection to banks and payment gateways: automating payments, bank reconciliation and invoice statuses saves dozens of hours a month.
- Process automation: from capturing and following up leads in the CRM to handling invoices, expenses, contracts or purchasing.
- Dashboards and BI: up-to-date dashboards on sales, margins, inventory turnover, team productivity and more.
- Support, training and guidance: getting the team to adopt the ERP is as important as the technology behind it.
At Interconecta we handle all these points as part of the project, not as later "extras." Our four-step methodology (free analysis and assessment, solution design validated by the client, development in 2-week sprints with a working demo, and go-live with training, data migration and ongoing support) is designed so that changing your ERP isn't a leap into the unknown.
What's more, every solution we build is custom, and the client owns the code: that means you can keep evolving your ERP, switch vendors if you ever need to and avoid captive licenses that limit your growth.
9. When it makes sense to get professional help choosing and implementing your ERP
Some SMEs can get a basic Dolibarr or FacturaScripts setup running on their own. But in some scenarios, forcing a do-it-yourself implementation usually ends up costing more: botched migrations, integrations that fail, users who don't adopt the system or technical decisions that tie your hands in the future.
It's worth getting professional help when:
- Your operations involve several critical areas: sales, purchasing, warehouse, light manufacturing, after-sales service…
- You need to integrate the ERP with your online store, banks, payment gateways or existing internal systems.
- You don't want to lose history or data quality when migrating from your current ERP/CRM.
- You plan to use the project to automate processes (invoices, expenses, contracts, HR, customer service…).
- You want a clear view of the project's ROI and measurable KPIs from day one.
In these cases, working with a team that has spent years implementing Odoo, Dolibarr, ERPNext or FacturaScripts in Spanish SMEs makes the difference between an ERP that's "installed" and one that really brings order to the company and frees up time. At Interconecta we work with our own in-house team in Spain (Murcia and Madrid), with no subcontractors, and we've completed more than 300 projects across ERPs, CRMs, integrations, automation and ecommerce.
If you're at the point where you know you need to make the move but are struggling to pin down the decision, you can ask us for a FREE, no-obligation tailored assessment and proposal. We analyze your case, propose an architecture based on one of these ERPs (or a hybrid solution) and give you a fixed timeline and fixed price so you can decide with all the information on the table.
FAQ: choosing an ERP for a small business in Spain
What is the best open-source ERP for a Spanish SME?
It depends on your business model and what you want to centralize. Odoo and ERPNext are more powerful and better suited to integrating many areas (CRM, ERP, HR, WMS), while Dolibarr and FacturaScripts are a better fit when you want simplicity and an orderly move away from Excel or invoicing software. The key is to start from your processes and choose the tool you'll have to force the least.
Is it a good idea to start with a "small" ERP and switch to another later?
Only if the switch is planned from the start. Changing ERP always means data migration, training and operational adjustments. It's often more cost-effective to properly implement, from the outset, an ERP that can grow with you (even if you only use part of it at first) than to run two projects within a few years. A serious upfront analysis helps you avoid falling short or oversizing.
How long does it take to implement an ERP in an SME?
It depends on the scope: centralizing just invoicing and inventory is not the same as integrating CRM, advanced warehouse management, HR and ecommerce. Rather than a generic number of months, what matters is working in clear phases, with partial deliveries in short sprints (for example, 2 weeks) and working demos in each iteration. That reduces risk and lets you start using parts of the system before the whole project is finished.
Can I integrate my online store and my bank with the ERP?
Yes, and it's highly recommended to do it from the start. ERP ↔ ecommerce integration avoids entering products, inventory and orders twice, and connecting to banks (PSD2) and payment gateways makes it easier to automate payments and reconciliation. At Interconecta we build these integrations bidirectionally and with data validation, so the ERP truly becomes the center of your information.
What about support and updates for an open-source ERP?
An open-source ERP doesn't mean you're on your own. You can have a partner who handles updates, monitoring, backups, report adjustments and further adaptations as your business changes. The advantage is that, because the code is open and owned by you, you're not tied to a single company: if you ever want to switch vendors, another team can pick up the work on your existing setup.