The best AI software development companies in Portugal in 2025

Portugal is no longer just a rising star in tourism and tech talent - it's now one of Europe’s most dynamic hubs for AI software development. In 2025, an increasing number of companies in Lisbon, Porto, Braga, and Coimbra are developing world-class artificial intelligence solutions for global markets.

If you're looking for an AI software development company that blends technical expertise with business strategy, Portugal offers a rich ecosystem. Here's a curated list of some of the best players in the space.

Unbabel – AI-powered multilingual communication

A leader in AI-enhanced translations, Unbabel leverages machine learning and human refinement to help companies scale global customer support. Their platform is widely used by brands like Booking.com and Microsoft.

Feedzai – Fighting financial crime with AI

Specializing in fraud prevention, Feedzai applies real-time AI and machine learning models to safeguard global financial transactions. A trusted partner for banks and fintechs, their solutions are built on principles of explainable and responsible AI.

Sword Health – AI-driven digital therapy

Based in Porto, Sword Health uses AI to deliver virtual physical therapy, improving outcomes and reducing costs for patients and health providers worldwide. Their intelligent platform personalizes treatment plans and tracks progress in real time.

Defined.ai – Data infrastructure for smarter AI

A key enabler in the AI value chain, Defined.ai (formerly DefinedCrowd) provides high-quality, ethical training data for AI models. Based in Lisbon, they serve Fortune 500 companies building voice, computer vision, and NLP systems.

BySix – Self-sufficient AI to power business transformation

With nearly a decade of experience, BySix focuses on end-to-end Generative AI solutions, combining deep LLM expertise, robust engineering, and AI infrastructure. From custom agents to AI strategy and advisory, they help businesses unlock autonomous systems that scale with confidence and compliance.

Portugal’s top AI developers don’t just write code - they build solutions with impact. Their strength lies in blending software development excellence with industry-specific knowledge, ethics, and agile execution. Most also integrate AI software development services like data engineering, prompt tuning, LLMOps, and business change management.

The country’s strong technical universities, English-speaking talent pool, and government-backed innovation ecosystem (via Portugal Tech, Startup Portugal, etc.) have created fertile ground for building future-proof AI solutions. Lisbon’s fast-growing tech scene and Porto’s engineering expertise make Portugal a destination for AI investment and partnerships.

While the list above shows the breadth of AI innovation in Portugal, BySix stands out by combining fearless innovation with practical engineering. We don’t just build GenAI - we scale it safely, embed it into your business, and focus on outcomes from day one. If you're looking for a partner to guide your AI journey, our doors are open.