10 Best SEO Agencies

Choosing among the best SEO agencies for international growth? This shortlist compares documented services and locations to help you choose an agency for your target markets.

1. Orbit Media Studios

Best for: International SEO supported by technical and content work.

Orbit Media Studios offers international SEO, technical SEO, content optimization, audits, and SEO consulting. Its global SEO service is intended for businesses reaching audiences in different markets, and the agency lists a Chicago office. This combination may suit a company that wants international planning connected to technical and content optimization, rather than treating expansion as keyword research alone. Ask which countries, languages, and technical tasks its proposed scope would cover. Request a quote.

2. Passion Digital

Best for: Localized SEO plans targeting EMEA or APAC markets.

Passion Digital describes international SEO that combines localized content, market-specific research, and technical optimization. Its stated coverage includes countries in EMEA and APAC, and it lists a London office. These services may suit businesses expanding in either region and adapting plans to different target markets. Confirm which countries and languages the agency can support, and how it would coordinate localization and technical work. Request a quote.

3. Progression Agency

Best for: Market-by-market research, localization, and tracking.

Progression Agency lists international SEO services including market-by-market keyword research, hreflang, localization, and tracking by market. The agency says it serves clients in the United States and worldwide, with headquarters in New York City. These capabilities may fit a business managing several country sites or language versions that needs a specific plan for each market. Ask how its tracking and hreflang work would apply to your site structure and target markets. Request a quote.

4. International SEO Services

Best for: Multilingual, multiregional, and country-specific campaigns.

International SEO Services covers multilingual, multiregional, multinational, and country-specific SEO campaigns. Its listed activities include localized content, technical SEO, keyword research, and link building for international markets. The agency describes its services as global and lists locations in the United States, Liechtenstein, the United Arab Emirates, and the United Kingdom. This broad service mix may suit a brief spanning several markets and types of work. Clarify which countries, languages, and deliverables would be included. Request a quote.

5. MONDIS

Best for: International consulting and market-specific keyword strategy.

MONDIS provides international SEO consulting, technical optimization, market-specific keyword and content strategy, and international link building. Its service information describes support for businesses targeting markets in Europe and worldwide, and the agency lists a Berlin office. Companies planning European expansion or broader international targeting may value its mix of consulting and implementation-oriented capabilities. Ask how its keyword and content recommendations would be adapted for each market, and confirm which technical work is available. Request a quote.

6. Found

Best for: International search work alongside ecommerce SEO.

Found offers international SEO for businesses seeking visibility in multiple markets, using localized content and technical strategies. Its wider services include technical SEO, ecommerce SEO, digital PR, and content. The agency lists offices in London and New York. This mix may suit a business whose expansion combines international search with ecommerce or content needs. Ask which services would be included in the international SEO scope and how the proposed work would address your target markets. Request a quote.

7. Anicca Digital

Best for: Multilingual SEO with localized content and on-page work.

Anicca Digital offers international and multilingual SEO, including localized keyword research, content, and on-page optimization. Its service information describes strategy and implementation work with international businesses across markets, and the agency lists a Leicester office. Its focus on language-specific research and on-page work may suit companies adapting existing pages or creating content for different audiences. Ask which languages and markets the team can support, and whether the proposed scope covers implementation as well as planning. Request a quote.

8. Moccu

Best for: Coordinating international SEO strategy and rollouts.

Moccu provides international SEO strategy and implementation for brands seeking organic visibility across markets. Its service information includes local SEO expertise and coordination of international rollouts, and the agency lists a Berlin office. This may suit companies organizing search activity across several markets and wanting local considerations included in the rollout. Ask how the agency would coordinate work across your target countries and adapt its approach to your site setup. Request a quote.

9. Quality SMI

Best for: Multilingual SEO across Portuguese-, English-, and Spanish-language markets.

Quality SMI offers international SEO for projects spanning multiple markets and languages, including Portuguese, English, and Spanish. Its services include technical and content optimization for companies expanding internationally. The agency describes projects across the United States, Latin America, and other markets, and lists an office in Guarulhos, Brazil. Its documented language and regional focus may suit plans involving audiences across the Americas. Confirm which markets and language versions its proposed work would cover. Request a quote.

10. UniK SEO

Best for: Global SEO support including audits and link building.

UniK SEO provides SEO services including audits, link building, local SEO, and content marketing. Its site describes the agency as Portugal-based and serving global search markets, with an office in Algés, Portugal. This range may suit businesses seeking international support with foundational SEO activities as well as localized content or strategy. Ask how its audits and other services would apply to your target countries, and confirm which markets the team can cover. Request a quote.

How to choose an SEO agency

• Match listed services to your priorities, such as technical SEO, localized content, multilingual work, market-specific keyword research, or rollout coordination.
• Confirm which countries, regions, and languages the agency can cover. Ask whether that coverage includes your specific markets.
• Discuss how the work will address localization, technical requirements, and tracking across markets. Request clear deliverables for each part of the scope.
• Verify the current project scope and team availability. Ask who would handle the work and when they could begin.
• Request quotes from agencies that fit your needs. Compare proposed services, market coverage, and deliverables rather than assuming quotes cover the same work.

Frequently asked questions

What should I look for in an international SEO agency?

Look for services that match your target markets, such as localized keyword research, multilingual content, technical SEO, and market-specific tracking. Confirm which countries and languages the team can support.

Do these agencies offer technical SEO?

Technical SEO is listed among the services of Orbit Media Studios, Passion Digital, Progression Agency, International SEO Services, MONDIS, Found, Moccu, and Quality SMI. Confirm which technical tasks are included in the proposed scope.

How much does international SEO cost?

Pricing is not listed here. Request a quote from agencies you shortlist, then compare the proposed scope, deliverables, market coverage, and team availability.