Purchases and suppliers
Orders, receipts, costs and lead times. You know what's missing, what's coming and how much it costs before it becomes a problem.
Your SMB, in a single system.
A3ERP specialists. We deploy one ERP — and around it we build the custom apps and integrations your team needs.
20+ years with A3ERP
100+ SMBs deployed
4–12 weeks to go live
Your entire operation, in a single system.
A3ERP centralizes day-to-day processes — purchases, sales, accounting, inventory and production — so your team stops jumping between spreadsheets, old apps and inboxes.
Sales and customers
Quotes, orders, delivery notes and invoicing. Each customer with their history, prices and payment terms.
Accounting and finance
Entries, payments, bank reconciliation, taxes and closings. Connected to your accountant, no double work.
Inventory and stock
Real-time inventory, locations, batches, expiry dates. Critical stock and turnover visible every morning.
Production
BOMs, work orders, real costs and traceability. You know what to produce, when, and at what margin.
Dashboards and reports
Your KPIs on one screen. No more exporting to Excel every Monday or chasing numbers between departments.
A3ERP vs SAP Business One, Sage Murano and Microsoft Business Central.
Honest comparison for SMBs. If you're coming from one of the big names or considering them, this is what changes with A3ERP day-to-day.
Vs SAP Business One
Simpler. Cheaper. Productive in weeks, not months.
- 4-12 weeks deployment · SAP B1: 6-12 months
- Concurrent-user licensing · SAP: named-user
- From €30/user/month · SAP: much higher upfront cost
Vs Sage Murano
Same accounting horsepower. Much more flexible outside finance.
- Full operation (purchases, sales, inventory, production) · Sage: finance focus
- Concurrent-user licensing · Sage: per-install
- Open API for custom apps on top of your data
Vs Microsoft Business Central
No mandatory cloud, no per-user cost escalation.
- On-premise, cloud or hybrid · Business Central: cloud-mandatory
- Concurrent-user licensing · Business Central: subscription per user and module
- Integrations without being locked into the Microsoft ecosystem
Four reasons we recommend A3ERP to most SMBs.
We picked it as our main ERP because it answers the real SMB question best: "I want a system that works, that doesn't force me to change how I work, and that doesn't cost what my van is worth."
Real flexibility
It doesn't force a bureaucratic document flow. We configure the ERP to your way of working — not the reverse. What needs an expensive consultant in other systems is usually just a setting in A3ERP.
Concurrent-user licensing
You pay for simultaneous users, not installations. If your team rotates or works in shifts, you pay much less than with the "one license per person" model. Realistic for SMBs.
Accessible price
From €30 in the Professional version on a rental model. No giant upfront investments or mandatory on-prem servers. Start small and grow when it makes sense.
Custom-app integration
Its architecture lets us connect custom applications — mobile, web, automations — directly to its data. This is where Systray shines: extending the ERP exactly where the standard falls short.
And if your case is clearly different (lots of exporting, very complex production, very advanced accounting), we say so. Having a favorite doesn't mean closing our eyes to the rest.
A phased process, no nasty surprises.
Deploying an ERP isn't installing a program. It's changing how your team works. That's why we do it in short steps, with clear milestones, and we never migrate blindly.
- 01
Diagnosis
An initial — free — meeting to understand your business, your processes, what you use today and what slows you down. We leave with a map, not a quote.
- 02
Proposal and choice
We recommend which ERP fits, which modules, which licenses and which timeline. We compare real options and put the cost in writing before touching anything.
- 03
Configuration
We tune the ERP to your way of working: masters, workflows, permissions, templates, reports. All on a test environment you can poke at.
- 04
Data migration
We move customers, suppliers, items, history and balances from the old system. We test twice before cutting over — and if anything fails, we put it in writing.
- 05
Training and go-live
We train users at their actual workstation, not in a classroom. We're with you at go-live so the first week isn't hell.
- 06
Ongoing support
After go-live we stay. We answer questions, tune settings, evolve reports and connect the custom apps you ask for.
Custom apps and a3buddy on top of A3ERP.
A3ERP covers 80 % of what you need. The other 20 % — that weird flow in your industry, that warehouse app the team keeps asking for, that AI assistant that would save hours — we build it on your data.
Custom applications on top of A3ERP
Mobile apps, internal web apps, automations and integrations with customers and suppliers. Connected directly to A3ERP — and, via API, to your current system too if you haven't migrated yet.
a3buddy · AI assistant for A3ERP
Ask your A3ERP in plain language. Stock, invoices, customers, analytics in seconds. No migration, no system change. Built by Systray.
Integrations with banks, accountants and e-commerce
Connection to electronic banking, invoicing platforms, accountants, marketplaces and payment gateways. Your data flows where it needs to.
What we usually hear in the first meeting.
How long does an A3ERP deployment take?
Depends on size and modules. A small A3ERP can be live in 4-6 weeks. A large deployment with production and multi-company usually takes 3 to 6 months. We tell you before we start.
How much does it cost?
Two buckets: A3ERP licenses (recurring, monthly) and deployment (one-off, by hours or fixed). For a small SMB, A3ERP starts from €30/month in licensing. Deployment depends on scope — always with a fixed budget per phase.
Do I have to migrate everything to the cloud?
No. A3ERP can run on-premise, cloud or hybrid. We recommend what makes sense in your case — not what's trendy.
Do you deploy SAP, Sage or Business Central?
No. After years evaluating them, we decided to specialize only in A3ERP — it's the one that best fits the SMB profile we care for. If your case genuinely needs another, we'll tell you and point you in the right direction — no smoke.
What if I already have a different ERP and don't want to switch?
We respect that. If your current ERP works, we won't push. We can help you with custom apps, integrations or automations on top of what you have. And when the time to migrate comes, A3ERP will be here.
Do you work outside Catalonia?
Yes. We have customers across Spain and provide remote support from Granollers. For larger deployments we travel for the go-live and training days.
One meeting, one map, and you decide.
The first meeting is free and with no commitment. We leave with a clear diagnosis of your situation and an honest recommendation — even if the recommendation is "don't switch ERP yet".
Request ERP diagnosis →