Are these really the “best” SEO agencies in Portugal?

“Best” is always relative. This guide is based on public information about services, focus and experience, not paid placement. The goal is to point you toward credible options with a clear SEO offering in Portugal, and to show where AISO Hub fits as an AI Search Optimization specialist. You should still compare proposals, talk to teams and check fit for your industry.

What’s the difference between SEO and AI Search Optimization (AISO)?

SEO optimises your site to rank in search engines like Google: technical health, content, links and on-page optimisation. AISO focuses on making your site reusable by AI assistants and AI Overviews: clear entities, structured data, answer-ready content and monitoring of inclusions. Good SEO is still necessary, but on its own it does not guarantee that AI systems will cite you.

Can I work with both a classic SEO agency and AISO Hub?

Yes. Many clients keep their existing SEO/SEM agency for authority and content production and bring in AISO Hub as a specialised layer to fix structure, schema, page patterns and AI visibility. In other cases, AISO Hub replaces the SEO agency when clients prefer a single partner for both AI discovery and SEO fundamentals.

How should I shortlist agencies from this guide?

Start from your primary goal: local visibility in Portugal, international reach, content and links, AI assistants, or full digital marketing. Shortlist two to four agencies whose positioning matches that goal. Then look at case studies, familiarity with your tech stack and culture fit. For AISO Hub specifically, it makes the most sense if you’re already investing in SEO but not seeing yourself in AI answers — that’s where an AISO-first approach pays off.

How quickly can I expect results?

In classic SEO, meaningful changes in rankings and traffic often take two to six months, depending on competition and the current state of your site. For AISO work, you can sometimes see initial AI inclusions after the first implementation batch, but broader coverage still depends on how often assistants update their indexes and models. No serious agency can guarantee exact rankings or AI citations — only a higher probability and a much stronger level of readiness.

Best SEO & AI Search Optimization Agencies in Portugal (2025 Guide)

If you’re searching for the best SEO agency in Portugal, you already know organic visibility is non-negotiable. What’s changing fast is where people search: not just Google, but AI assistants like ChatGPT, Gemini and Perplexity.

This guide gives you a curated list of SEO and AI-focused agencies in Portugal, plus how they differ and when it makes sense to work with each. We also explain where AISO Hub fits in as a specialist in AI Search Optimization (AISO) — the layer that makes your site reusable by AI assistants as well as search engines.

Note: this list is editorial and based on public information about each agency’s services, focus and track record. It’s not paid placement, and the order is not a ranking.

How we chose these Portuguese SEO agencies

To build this list, we looked at agencies that:

Are based in Portugal or strongly active in the Portuguese market.
Have a clear SEO offering (not just “we also do SEO” buried under generic marketing).
Show case studies, client results or long-term experience in SEO or digital marketing.
Serve SMEs and/or larger brands in Portugal or internationally.

This isn’t an exhaustive list of every SEO provider in Portugal. It’s a starting point to compare approaches — and to see where classic SEO stops and AI Search Optimization needs to begin.

At a glance: agencies covered

AISO Hub – AI Search Optimization & SEO (Portugal)
UniK SEO – Full-service SEO & PPC, international focus
Local SEO (localseo.pt) – SEO and link-building, strong focus on strategy and audits
DivSync Digital – SEO plus digital marketing for the Portuguese market
Digiton.ai – AI-driven digital marketing & automation with strong SEO case studies
Lisbon Web Design – Web design with SEO-focused builds for Portugal & Europe
SP Agencia SEO – SEO & WordPress consultancy for SMEs and freelancers
BeFound – Local, national and international SEO specialist in Portugal
The Key SEO Agency – SEO consultancy with strong content and link-building focus
Incremento – Portuguese web & marketing agency with a full-suite SEO service

AISO Hub – AI Search Optimization & SEO (Portugal)

Best for: B2B SaaS, e-commerce and service brands that care about AI assistants and SEO.

AISO Hub is an AI Search Optimization agency based in Portugal that makes websites the source AI assistants cite — and keeps SEO safe while doing it. The focus is entity-first architecture, structured data and answer-ready content that AI can lift directly into answers. On top of this, AISO Hub also covers the classic SEO basics: technical health, canonical structure, Core Web Vitals and intent-matched content.

Rather than acting as a generic “SEO & PPC” shop, AISO Hub usually plugs in under existing SEO/SEM agencies or replaces them when clients want a single partner for AI discovery + SEO guardrails + monitoring.

Other strong SEO agencies in Portugal

UniK SEO – International SEO & PPC

Best for: Companies that want a full-service SEO & PPC agency with international scope.

UniK SEO is a Portugal-based SEO agency focused on increasing organic and paid traffic across major search engines like Google and Bing. They offer a wide range of services including SEO, PPC management and content marketing, and emphasise tailored strategies and ROI tracking for clients in multiple countries and languages.

If you’re looking for a classic, established SEO agency with broad vertical coverage and campaigns across several markets, UniK SEO is a solid candidate.

Local SEO (localseo.pt) – SEO & Link-building

Best for: Businesses needing hands-on SEO strategy, audits and link-building.

Local SEO is a Portuguese SEO agency focused on on-page optimisation, off-page SEO and link-building. They highlight strategic planning, tailored campaigns and over a decade of experience across startups, SaaS, local businesses and fintech. Their services include SEO audits, e-commerce SEO, link-building and paid search.

They’re a good fit if you want a traditional SEO partner with strong emphasis on technical and off-page work.

DivSync Digital – SEO for the Portuguese Market

Best for: Companies targeting Portugal specifically with SEO plus digital marketing.

DivSync Digital is a digital marketing agency that positions itself as a trusted partner for the Portuguese digital market. Alongside SEO, they provide social media management, PPC, email and broader digital campaigns, with case studies focused on traffic growth and lead generation.

If you need a multi-channel marketing partner with strong SEO in the mix, especially for Google.pt, DivSync is worth considering.

Digiton.ai – AI-Driven Digital Marketing & SEO

Best for: Brands wanting AI-enhanced campaigns and SEO growth.

Digiton.ai is a Portugal-based digital marketing agency that leans heavily on AI automation and data analysis. Their case studies include large traffic gains from organic SEO campaigns and ongoing optimisation. They mix SEO, performance marketing and automation to drive visibility and conversions.

They’re a good option if you want a data-driven marketing team using AI to improve campaigns across channels.

Lisbon Web Design – Web Design with SEO Focus

Best for: Businesses that need a new website + SEO for the Portuguese market.

Lisbon Web Design offers web design, SEO, hosting and support, with a clear focus on user-centric, multilingual sites and SEO-focused web builds for Portugal and Europe. Their pitch combines design, local-market understanding and search optimisation.

They’re ideal if you’re starting from scratch and want design + SEO baked in from day one.

SP Agencia SEO – SEO & WordPress for SMEs

Best for: SMEs and freelancers needing SEO + WordPress help on a budget.

SP Agencia SEO positions itself as an SEO and WordPress consultancy for SMEs and freelancers, working with clients in Portugal and other markets. They combine website design, SEO strategies and copywriting, tailored for small and medium-sized businesses.

If you’re an SME looking for pragmatic SEO and WordPress support, they’re a leaner alternative to large agencies.

BeFound – Local, National & International SEO

Best for: Local businesses that want to dominate local search.

BeFound is a Portuguese consultancy specialising in Local SEO, with services also covering national and international SEO. With over 15 years in the industry, they focus on helping businesses climb organic rankings and attract more local customers.

They’re a strong pick if your priority is local visibility in Portugal.

The Key SEO Agency – Content & Link-building Focus

Best for: Companies wanting content-driven, link-building-heavy SEO.

The Key SEO Agency is a Portugal-focused SEO consultancy that emphasises technical diagnosis, on-page optimisation and off-page work such as content marketing and link-building. They work with businesses in multiple countries and highlight case studies across beauty, consulting and e-commerce.

If you’re looking for a partner to improve rankings through content + links, they’re one to evaluate.

Incremento – Web, Marketing & SEO

Best for: Businesses that need web design + SEO + general marketing from one team.

Incremento is a Portuguese website, design and marketing agency offering a full suite of SEO services, from content and technical optimisation to local marketing and lead generation. SEO and content marketing are a core part of their broader service offering.

They’re suitable if you want an integrated web + marketing partner where SEO is one strand of a bigger strategy.

When to choose a classic SEO agency vs AISO Hub

Choose a classic SEO agency (like the ones above) when:

You mainly care about Google rankings and organic traffic, not yet about AI assistants.
You need hands-on link-building, content production and monthly campaign management.
You want a broader digital marketing bundle (SEO + PPC + social + email) from one vendor.

Choose AISO Hub when:

You want your site to be understandable to AI assistants (ChatGPT, Gemini, Perplexity, AI Overviews).
You already invest in SEO/SEM but feel invisible in AI answers.
You need entity-first architecture, structured data and answer-ready content that can be reused safely by AI systems.
You’re happy to keep your existing SEO/SEM agency and add a specialist AISO layer, or to replace them with a partner that can handle both.

In practice, many brands end up with both: a traditional SEO agency for authority and distribution, and AISO Hub to make the site “AI-liftable” and technically sound.

If you’d like to see how AISO Hub could work alongside (or instead of) a classic SEO agency for your Portugal-based brand, you can always start with a lightweight AISO X-Ray or AISO Audit and build from there.