A software development company in Europe designs, builds and maintains custom software for businesses: web applications, customer portals, internal tools, integrations and automation that off-the-shelf products do not cover. To compare partners fairly, score each one on the same criteria, namely relevant evidence, the people assigned, process, technical quality, security, ownership terms and support, using the same brief, rather than comparing headline prices for different scopes.
Last updated: 6 November 2026.
This guide explains what such a company does, when custom software makes sense, and gives you a scorecard, a technical due-diligence checklist and the questions to ask before signing.
What does a software development company do?
A software development company turns a business need into working, maintainable software. The work usually spans discovery, architecture, user experience and interface design, development, testing, deployment and long-term maintenance.
For European businesses, the most common projects are:
- Custom business software: tools built around a company’s own processes, such as quoting, scheduling or production planning.
- Web applications and portals: customer or partner areas where people log in, order, track or manage accounts.
- Internal tools and dashboards: replacing spreadsheets with secure, shared systems.
- Integrations and automation: connecting CRM, accounting, stock and e-commerce systems so data moves without manual work.
- SaaS products: subscription software sold to other businesses.
- Mobile apps that sit on top of these systems.
Odduel, a creative and technology agency in Barcelona and São Paulo, builds these kinds of solutions through our application development service, with design and engineering planned together from discovery onwards.
In short: decide what problem the software must solve and for whom, write it down, then compare partners with one scorecard. The best proposal is the one that understood your problem, not the one with the lowest number.
When should a business build custom software?
Build custom software when your process is a real source of advantage and existing products would force you to change it for the worse, when you are paying for several tools stitched together by hand, or when you need to own the logic and data outright.
Buy or subscribe when a mature product already does the job, the process is standard (payroll, basic accounting, email marketing) and configuration covers your needs. Many good solutions mix both: standard products for standard work, connected by custom integrations and a custom layer where the business is different.
What types of software development company exist in Europe?
| Type | What they do best | Fits | Consider |
|---|---|---|---|
| Product-focused agency | Discovery, design and engineering together | New products, portals, tools that users must adopt | Check depth in your technology |
| Engineering consultancy | Complex back ends, architecture, scale | Large systems, legacy modernisation | Design and adoption may be thin |
| Specialist in one platform | Deep knowledge of one ecosystem | Projects committed to that platform | Advice may lean towards that platform |
| Staff augmentation provider | Supplying developers to your team | Companies with strong internal leadership | You carry the product and delivery risk |
| Freelancer | Direct, flexible, focused | Small, well-defined tasks | Capacity and continuity |
Location within Europe matters less than fit, as our guide to nearshore software development in Europe explains.
How do you compare a software development company in Europe?
Use one scorecard for every company, weighted to what matters most for your project. Score each line from one to five after meetings and proposals.
| Criterion | What to look for | Suggested weight |
|---|---|---|
| Relevant evidence | Projects of similar complexity and type, with references | High |
| Understanding of the problem | Questions about users, data and process, not only features | High |
| People | Named designer, technical lead and project manager; employees or contractors | High |
| Process | Discovery, short iterations, demos of working software, change control | Medium |
| Technical quality | Code review, automated tests, documentation, sensible technology choices | Medium |
| Security and data protection | Access control, secrets handling, GDPR, hosting location | Medium |
| Ownership and exit | Your code, your accounts, handover terms | High |
| Support | Response times, monitoring, maintenance scope | Medium |
A scorecard turns a vague impression into a decision you can explain to colleagues, and it exposes gaps: a company that scores high on presentation but low on people and ownership is a risk.
What should technical due diligence cover?
You do not need to be a developer to check the basics. Ask to see, or have an adviser review, the following:
- A sample of code or a technical walkthrough of a past project, with client permission.
- How code is reviewed before it is merged, and by whom.
- Automated testing: what is tested, and how failures stop a release.
- Deployment: how software moves from development to production, and how it is rolled back.
- Security practice: how the team guards against common weaknesses such as those in the OWASP Top Ten, and how credentials are stored.
- Documentation: what a new developer would receive to take over the project.
- Monitoring: how errors and downtime are detected after launch.
Clear, specific answers matter more than any particular tool. Vague answers here usually predict expensive problems later.
Which questions should you ask before signing?
- Which projects like ours have you delivered, and may we speak to those clients?
- Who will work on our project, how much of their time, and are they employees?
- How will you run discovery, and what will we receive at the end of it?
- How do you estimate, and what happens when estimates prove wrong?
- How are scope changes handled and priced?
- Where will our data be hosted and processed, and who are your subcontractors?
- Who owns the code, designs, documentation, repositories and cloud accounts?
- What does support after launch include, and how fast do you respond?
- How would we move the project to another team if we needed to?
Data handling deserves precise answers: under the General Data Protection Regulation, the partner usually acts as a processor of your customers’ personal data, which requires a written agreement and appropriate security measures.
What does custom software cost?
Cost depends on scope, complexity, integrations and quality requirements far more than on the partner’s country. A fixed quote follows a short brief, and for larger products a paid discovery phase. The main lines are:
- Discovery and design, which reduce risk and often save more than they cost.
- Development of features, integrations and admin tools, usually the largest share.
- Testing and security work, which should never be the line that disappears to win a deal.
- Infrastructure for hosting, environments and monitoring.
- Maintenance each year after launch for updates, fixes and improvements.
For subscription products, our SaaS development cost article explains the additional lines, such as billing and multi-tenant data.
Fixed price or time and materials?
| Model | How it works | Fits | Risk sits with |
|---|---|---|---|
| Fixed price | Agreed scope for an agreed price | Well-defined work, clear acceptance criteria | Partner on cost; client on scope changes |
| Time and materials | Billing for time spent, with regular reporting | Evolving products, discovery, ongoing work | Client, managed through priorities |
| Phased | Fixed discovery, then fixed or capped phases | Most new products | Shared, phase by phase |
A phased approach often works best: a fixed discovery produces a scope precise enough to price the build with confidence.
What are the warning signs?
- A full estimate without questions about users, data or integrations.
- No named team, or a team that changes after signing.
- Repositories, hosting or domains registered in the partner’s name.
- No automated tests and no code review.
- No written change process.
- Reluctance to talk about handover or exit.
Questions people ask
What is the difference between a software development company and an IT services company?
A software development company designs and builds new software, such as applications, portals, integrations and tools. An IT services company typically runs and supports existing systems: devices, connectivity, user accounts, hosting and help desks. Some firms do both, but the skills differ, so check evidence for the specific kind of work you need.
How do I know if a software development company is reliable?
Look for projects similar to yours, speak to past clients, meet the people who would work on your project, and ask specific questions about testing, security, ownership and support. A short paid discovery phase is the best test: it shows how the company communicates and thinks before you commit to the full build.
Should a small business work with a software development company?
Yes, when software would remove real manual work or open a new revenue stream, and when existing products do not fit. Start small: one process, one tool, a clear measure of success. A good partner will tell you when a standard product with some configuration or an integration is the better answer.
What should a software development contract include?
Scope or a scope process, phases and acceptance criteria, team and roles, pricing model, change control, payment terms, ownership of code and designs, data protection terms, security obligations, warranty for defects, support and maintenance, and exit and handover arrangements. Clear exclusions prevent most disputes later.
How long does it take to build custom software?
It depends on scope, integrations and how quickly decisions are made. A focused tool covering one process can launch far sooner than a platform with many user roles and connections. Discovery, design approval and testing take real time; a tight first release followed by regular improvements is usually the fastest route to value.
Write a short brief and adapt the scorecard above to your priorities before you contact any company. To compare app-focused partners, read our guide to choosing an app development company in Europe. When you want to discuss custom software for your business, see our application development service or tell us what you need.
