The Spanish mobile app development market offers options for every profile: large technology consultancies, specialist agencies, team marketplaces, and smaller product-focused studios. The goal is not to find the "best" agency in the abstract, but the one that fits your project, your budget, and your way of working.
Before getting into specific names, here are the criteria that actually matter:
Published case studies similar to your project in their portfolio.
An in-house technical team or a network of verified partners (very different in practice).
Up-to-date technology: Flutter, React Native, or native development depending on the case.
Direct communication with the people building the product, not just a sales contact.
Fixed budgets and realistic timelines from day one.
Blimbur is a custom software development consultancy focused on startups and SMEs. Their team is entirely in-house: five people (developers, UX/UI design, and technical leadership), with no outsourcing or offshore teams. The person who advises you in the first meeting is the same person who will write your project's code.
For mobile apps, they primarily work with Flutter, which allows launching on both iOS and Android from a single codebase without compromising quality or performance. They also work with React Native, Swift, and Kotlin when the project calls for it. They have delivered more than 50 projects across more than ten different sectors.
Their clearest differentiator for startups and SMEs: the team does not just develop — they help define the product, prioritise features, and make technical decisions that clients without an internal CTO cannot make alone. Budgets are fixed from day one, with weekly progress updates and no surprises at the end.
They are a particularly strong fit for companies launching their first digital product, looking to digitise internal processes, or wanting to evolve an existing app without switching providers every time.
Emergya is part of the Ayesa group, a global technology and engineering services provider with more than 12,500 employees across 23 countries. The Seville-based company has built its reputation on digital transformation projects for large organisations: Mutua Madrileña, Mapfre, Liberbank, HPE. In 2023 it was recognised by Google as Partner of the Year in Iberia and is the first Spanish partner to hold Google Cloud's Machine Learning specialist certification.
In mobile development, they work with both native and cross-platform technology, always as part of larger projects that include cloud, data, and artificial intelligence. Their approach is that of a complete digital product partner, not just an app builder.
A solid option for large companies or public organisations with complex projects that go well beyond the app itself. For startups or SMEs that need agility and direct communication, their scale and structure may not be the best fit.
Plain Concepts was founded in León in 2006 and has grown into a multinational with more than 700 employees and offices in over 26 countries. They define themselves as a "software development boutique," though their clients include Ibex-35 heavyweights: Telefónica, Acciona, Iberdrola, Coca-Cola, Ferrovial. They have also worked on the Zara iOS app.
Their most recognised specialisation lies in artificial intelligence, cloud, mixed reality, and enterprise development. In mobile apps, they have extensive experience on technically complex projects with large user volumes and demanding corporate system integrations.
A clear reference if the app project is part of a broader digital transformation within a large organisation. For startups or SMEs, their structure and focus are aimed at a different type of client.
Yeeply is a marketplace that connects companies with verified development teams. They do not have a permanent in-house development team: their model involves analysing the client's project and assigning it to a company within their certified partner network. They operate in several European languages and markets.
This model has advantages: it lets you compare options and manage the process with a certain level of oversight. But it also means there is no single team with continuity on the project, and coordination between the client, Yeeply, and the assigned team adds layers of intermediation. It works well for projects with a clearly defined scope where process oversight is the priority.
The choice depends on the type of company you are and the project you have:
Startup or SME without an internal technical team: you need a partner who helps you make technical decisions, not just execute them. Direct communication and budget transparency matter most.
Large company with a digital transformation project: you likely need a consultancy with organisational depth, experience in complex integrations, and the resources to manage long-running projects.
Well-defined project with urgency: a marketplace like Yeeply can speed up the process of finding an available team.
In any case, a no-commitment first meeting is worth it before signing anything. If the agency asks no questions about your business, that already tells you a lot.
Our clients' satisfaction is our best introduction.
"Tengo un negocio de Paquetería, en el que vienen muchas personas diariamente, tanto para recoger como para dejar paquetes. Llevábamos años gestionando muchos de nuestros procesos de paquetería de forma manual, y gracias a Blimbur Technologies hemos dado un salto enorme. Nos desarrollaron una app móvil y una web totalmente adaptadas a nuestro flujo de trabajo, con las que ahora tenemos todo automatizado, trazable y mucho más rápido. Ahora, el cliente sabe si tenemos el paquete y al estar todo mucho más organizado, es mucho más rápido y ágil, lo que hace que los clientes vengan y se vayan con otra cara y sin esperas. El trato ha sido impecable y el resultado, todavía mejor. Un equipo serio, técnico y que se implica de verdad."
