---
title: "Custom software development for businesses | Kyros"
description: "Custom software development studio: ERP, CRM, SaaS platforms, intranets and apps, with our own code and phased deliveries."
url: "https://kyros-software.com/en/custom-software-development"
locale: "en"
site: "Kyros"
---

# Custom software development

> We build the software your company needs and can't buy off the shelf: from an internal portal to a SaaS platform. Our own code, documented and built to last.

## What's included

- Business software: ERP, CRM and intranets.
- Multi-company SaaS platforms.
- Web and mobile apps on the same backend.
- Integrations with the Spanish Tax Agency and external services.
- Deployment with Docker and CI/CD, monitoring and support.
- Security audits of web applications and APIs.

## Already in production

Some of the projects we've built:

- Zurvyn, our modular SaaS platform: each company turns on the apps it needs.
- A day-to-day portal for a network of advisory firms.
- An ERP for a training center, from enrollment to payment.
- A multi-company invoicing and accounting platform with VeriFactu.

## How we work

- A clear estimate before we start, no surprises.
- Phased deliveries: you see progress early and always know where the project stands.
- Our own code, documented and reviewed: any team can pick it up.
- Deployment, monitoring and support once it's live.

## Common questions

### What kind of software do you build?

Business software (ERP, CRM and intranets), multi-company SaaS platforms and web and mobile apps, with Spanish Tax Agency and external service integrations.

### Who do I talk to during the project?

The person who writes the code: direct contact, no middlemen. You always know where the project stands.

### What happens once the software is live?

We deploy it with Docker and CI/CD, monitor it and provide ongoing support.

## Tell us about your project

We reply within 24-48 business hours with a proposal and an estimate, no strings attached.

Contact form: https://kyros-software.com/en#contacto

---

## Other pages

- [Kyros | Software development studio in Spain: ERP, CRM, AI](https://kyros-software.com/en.md)
- [About us](https://kyros-software.com/en/about.md)
- [Spanish Tax Agency integrations](https://kyros-software.com/en/aeat-integration.md)
- [VeriFactu software](https://kyros-software.com/en/verifactu-software.md)
- [Custom ERP](https://kyros-software.com/en/custom-erp.md)
- [Custom CRM](https://kyros-software.com/en/custom-crm.md)
- [AI for business](https://kyros-software.com/en/ai-for-business.md)
- [Web apps](https://kyros-software.com/en/web-application-development.md)
- [Software development in Tarragona](https://kyros-software.com/en/software-development-tarragona.md)
- [Privacy policy](https://kyros-software.com/en/privacy.md)
- [Legal notice](https://kyros-software.com/en/legal.md)
- [Cookie policy](https://kyros-software.com/en/cookies.md)

## Other languages

- [Español](https://kyros-software.com/es/desarrollo-software-a-medida.md)