January 28, 2026
A strong internet presence is a must in Spain. Traditional Search Engine Optimization (SEO) was what this meant for years. The ultimate objective was to rank highly for your target keywords on Google. But the definition of “good SEO” is changing.
With the rise of AI chatbots, Google’s AI Overviews, and Large Language Models (LLMs) answering user questions directly, ‘ranking’ is no longer enough. Your brand must now be the trusted answer.Traditional SEO needs to change in this situation. The most successful agencies nowadays need to understand the latest developments of Generative Engine Optimization (GEO) in addition to the basics (technical SEO, link building).
This list ranks the Top 10 SEO Agencies in Spain based on their ability to deliver results today and future-proof your brand for the AI-driven tomorrow.
1. Seeders
By effectively combining extensive traditional knowledge with a clear focus on future-proofing, Seeders keeps the top ranking. Their authority in local and international SEO is unmatched, as they have over 800 clients in more than 50 international markets and have over 13 years of experience. Their direct integration of Generative Engine Optimization (GEO) into their core services is what really makes them stand out. The advanced packages offered by Seeders already include "GEO visibility audits" and "LLM Content optimization," ensuring that their clients dominate traditional search and the newly developed AI-driven answer engines.
Seeders’ key PPC services
International SEO, Local SEO
Generative Engine Optimization (GEO)
LLM Content Optimization
Digital PR & Link Building
Why they're #1
Their SEO packages are the only ones on this list that have clearly incorporated the future of search (GEO/LLM), providing a solution that is truly future-proof.
Website: https://seeders.com/seo/
2. NeoAttack
Description: NeoAttack is a Madrid-based digital marketing agency specializing in integrated, performance-driven solutions like SEO, SEM, social media, web design, and branding, focused on boosting clients' online visibility, traffic, leads, and sales through personalized strategies and creative campaigns for both small and large businesses. They are known for a "growth-hacking" approach that prioritizes sales and tangible ROI over vanity metrics. They have grown rapidly to become a go-to agency for medium-to-large enterprises in Spain looking for aggressive growth.
- Key services: SEO, PPC advertising, corporate web design, content marketing & strategy, social media management.
3. BIGSEO
Description: BIGSEO is a leading digital marketing agency, founded by influencer Romuald Fons, specialising in generating business growth through tailored strategies in SEO, SEM, CRO, and funnel optimisation, focusing on data-driven results like increased traffic, conversions, and sales for clients globally, with strong roots in the Spanish-speaking market.
- Key services: SEO consulting, YouTube growth/SEO, inbound marketing, e-commerce optimisation, and Conversion Rate Optimisation (CRO).
4. Human Level
Description: Headquartered in Alicante, Human Level is one of the most respected technical SEO consultancies in Spain. Led by Fernando Maciá, an author and speaker in the industry, they are the agency of choice for complex technical audits and large-scale migrations for major Spanish brands and media outlets.
- Key services: technical SEO Audits, international SEO, web migrations, digital analytics, PPC.
Ready to scale your SEO across borders?
Let's get started
5. Estudio34
Description: Estudio34 is a digital consultancy and marketing agency based in Barcelona, Spain, that specializes in providing measurable, data-driven strategies to increase online visibility, traffic, and conversions for its clientsTheir team is multilingual, making them a strong option for companies targeting both the Spanish and Catalan markets, as well as broader Europe.
- Key services: SEO (strategy, local, Mobile), SEM/PPC, CRO, web analytics, ASO (App Store Optimization).
6. La Teva Web
Description: With over 20 years of experience in Barcelona, La Teva Web is a full-service digital agency with deep roots in the local market. They offer a mix of design and marketing, ensuring that websites are not only optimized for Google but also visually appealing and user-friendly. They are particularly strong in local SEO for Catalan businesses.
- Key services: Web design & development, SEO, SEM, social media marketing, ecommerce solutions.
7. Rodanet
Description: Rodanet is a digital marketing agency based in Barcelona, Spain, that specializes in Search Engine Optimization (SEO) and Paid Media (SEM/PPC). Established in 2011, their primary goal is to generate business and increase sales for clients by improving their online visibility and conversion rates. They are particularly skilled in working with e-commerce platforms like PrestaShop and Magento.
- Key services: SEO (ecommerce, enterprise), Google ads, social ads, inbound marketing, web development.
8. Coco Solution
Description: Originally from the Canary Islands and operating nationally, Coco Solution creates "Search & Build" strategies. They are unique because they often build their own proprietary technology and frameworks to give clients a speed and technical SEO advantage that off-the-shelf templates cannot match.
- Key services: advanced technical SEO, web development, app development, branding, programmatic advertising.
9. Elogia
Description: Elogia is a specialized "digital commerce marketing" agency with a long history in the Spanish market (since 1999). While they cover full digital marketing, their SEO division is highly capable, particularly for large retailers and fashion brands. They are part of the VIKO group, giving them significant resources.
- Key services: marketplaces (Amazon) SEO, digital strategy, CRO, social media, email marketing.
10.Marketzilla
Description: Marketzilla is a highly-rated agency focused on "dominating" search results. They are known for high-impact strategies that combine aggressive link building with solid on-page optimization. They provide personalized audits, use tools like Semrush, and create customized strategies to boost business growth through search engines.
- Key services: SEO consulting, link building, content marketing, online reputation management.
How to choose the right SEO partner in Spain
Choosing the right SEO partner in Spain is a critical strategic decision. Any of the top agencies on this list can provide a strong foundation in traditional SEO, from technical audits to content marketing.
However, to truly gain a competitive advantage and secure your brand's future visibility, you must also consider the AI-driven landscape. The shift to Generative Engine Optimization (GEO) is happening now, and a partner that understands this is no longer a "nice to have" but it's an essential.
Case studies of Seeders
Still not convinced? Take a look at Seeders’ case studies and see how SEO strategies have helped clients achieve outstanding results.
Are you ready for the future of search?
While many agencies are still adapting, Seeders is already leading the charge. Contact Seeders today for a free consultation and see how your brand really performs in the new world of AI search.
Corporate Marketing Manager
Niels Krikke is the Corporate Marketing Manager at Seeders Zwolle. With a background in strategic marketing and a keen eye for detail, Niels is dedicated to creating effective marketing campaigns that drive results. With a focus on data-driven strategies and a passion for innovation, Niels plays a key role in developing and executing marketing initiatives that help us achieve our business goals.
