Custom ERP softwarebuilt around your processes.
No two businesses are alike. We build ERP systems from scratch that reflect how your organisation actually works — not the other way around.
Off-the-shelf ERP platforms often force businesses to adapt their processes to fit the software. SEDNA.software takes the opposite approach: we listen carefully to how you operate, draw on our experience to suggest improvements, and then build a system that matches you precisely.
System map
Connected delivery scope
Planning
CRM
Finance
Reporting
Built around your process
Architecture, integrations and interfaces designed as one coherent system.
When custom ERP makes sense
Signs your business has outgrown standard software
Most companies do not start with custom ERP. They start with spreadsheets, a standard package and a few plugins. Custom ERP software becomes the better choice when that combination starts to slow the business down.
- Critical information lives in Excel files that only one or two people really understand.
- Your team types the same data into several systems: planning, CRM, accounting and the webshop.
- A standard ERP package forces workarounds because your planning, pricing or service process is different from the template.
- Licence costs keep rising per user or module, while the features you actually need are still missing.
- Management reports take days to compile because data has to be collected and cleaned by hand.
What our custom ERP software includes
Process-first design
We map your workflows in detail before writing a single line of code, so the system reinforces your strengths rather than creating new friction.
Deep integrations
Your ERP connects with accounting platforms like Exact, file systems, POS terminals, and third-party APIs so data flows automatically across your stack.
Real-time dashboards
Managers and executives get live KPI dashboards and analytics, giving instant visibility across the entire operation.
Mobile-ready
Field staff and remote employees access the system from any device, keeping teams aligned wherever they work.
Scales with you
The architecture is built to grow. Adding new modules, users, or integrations never requires a full rewrite.
Ongoing partnership
We work with clients on a flexible FTE basis, scaling our involvement up or down as your needs change.
Technology
Built on proven technology
We choose technology for maintainability, not hype. Your ERP runs as a secure web application, accessible from the office, the warehouse and the field, with integrations to the systems you already use.
- TypeScript
- React / Next.js
- PHP
- Python
- PostgreSQL
- MySQL
- REST & GraphQL APIs
- Exact Online
- Peppol e-invoicing
- Mobile web apps
- Role-based access
- Audit trail
How we build your ERP software
Discovery
We spend time understanding your business processes, pain points, and goals before any design work begins.
Architecture
We design the system architecture, data model, and integration points, then align with your team before we build.
Development
Iterative delivery with regular demos so you see progress and can steer throughout the build.
Launch & support
We handle deployment, data migration, and staff training, then remain available for ongoing development and support.
From practice
Team Industrial Services
A comprehensive web-based ERP covering service catalogue, scheduling, work orders, HR, CRM, and reporting — integrated with Exact accounting via API.
Costs & timeline
What does custom ERP software cost?
There is no fixed price for custom ERP, because no two systems are the same. What we can do is make the cost predictable: we start with a discovery phase and then estimate per module, so you know what each step delivers before you commit to it.
Number of processes and modules
Planning, CRM, work orders, stock, finance and HR: every module adds screens, rules and tests.
Integrations
Links to accounting, webshops, POS terminals or government systems each need their own design, error handling and monitoring.
Data migration
Moving years of data out of Excel or an old system requires mapping, cleaning and test runs.
Users, roles and devices
Field staff on mobile, approvals per role and audit requirements influence the design.
We deliver in phases, so the first module can be in use long before the complete system is finished. After launch we can continue on a flexible FTE basis, scaling up or down as your needs change.
FAQ
Frequently asked questions about custom ERP software
What is the difference between custom ERP and a standard ERP package?
A standard ERP package gives you predefined modules that your team has to adapt to. Custom ERP software is built around your existing processes, data and terminology. You only get the features you need, and the system can grow with new modules when the business changes.
Can a custom ERP connect to our accounting software?
Yes. Integrations are part of every ERP project. We have connected ERP systems to accounting platforms such as Exact Online, to POS terminals, webshops, HR software and Peppol e-invoicing, so data is entered once and flows automatically.
Can we start small?
Yes, and we usually recommend it. We start with the process that causes the most friction, put that module into use and then extend the system step by step. That spreads the investment and lets your team give feedback early.
What happens to our existing data?
We migrate data from spreadsheets and existing systems as part of the project. We map the old data to the new model, clean it up and run test migrations before the final switch, so your team starts with complete and reliable information.
How secure is a custom ERP system?
SEDNA.software is ISO 27001:2022 certified for information security. Every system we build includes role-based access, audit trails and secure hosting, in the cloud or on-premise depending on your IT and compliance requirements.
Who maintains the system after go-live?
We do, for as long as you want. Most clients keep working with us after launch for maintenance, support and new features. You decide how much capacity you need, from occasional changes to one or more developers working on your system.
Related services
Often combined with custom ERP
Let's build something great.
Tell us about your project and we'll get back to you within one business day.