The Best International SEO Agencies for B2B SaaS

I run international SEO programs in English, French, German, Italian and Spanish for B2B SaaS companies. Before that, I built my first agency in Spain, with roots in translation and localization. That background shapes how I judge other agencies. A translated page that sits on page three in France costs the same to publish as a native page that ranks first.

This list covers international SEO agencies I would send a friend to. UK buyers who want a team in London can use our list of London SEO agencies for international expansion. For agencies focused on writing in other languages, see our multilingual SEO agencies, and for agencies based on the continent, our SaaS SEO agencies in Europe. I checked every agency on its own website in October 2026 for current services, locations and named clients. Agencies that no longer offer international SEO, or whose sites have gone offline, came off the list.

How I vet an international SEO agency

These are the checks I use when a client asks me to review another agency, or when I hire specialists for our own programs. Each one is something you can test in a sales call or a paid trial.

Ask who writes the French, German or Spanish page

Ask for the name and location of the person who will write your content in each market. A native writer living in the market knows local search phrasing, retail calendars and regulations. A translator working from English copy usually does not.

For an ecommerce marketing platform we work with, translated versions of English pages sat in the mid-20s in France for the terms buyers search before choosing a platform. Native writers rebuilt each market from scratch around local search habits, retail calendars, regulations and customer examples. The client tripled its top-3 rankings in France within six months.

The test is simple. Request a sample page in your target language. Have someone in your local sales or support team score it for tone, terminology and accuracy.

Ask how they decide between localizing, rewriting and creating new pages

A good agency audits your existing pages before it translates anything. Some English pages localize well because the search intent matches across markets. Others need a full rewrite, and some topics have no demand in a given country at all. Our post on localization versus translation for SaaS covers how we make that call page by page.

Market differences go deeper than vocabulary. For a vertical SaaS client in veterinary software, burnout messaging that works in North America does not land the same way in France. The term "SOAP notes" is also less common in the UK and Europe, where clinics more often say "medical records." An agency should be able to give you examples like these from its own work in your target markets.

Ask to see results filtered by country

Ask for Search Console screenshots filtered by country or by language subfolder, with the date range visible. Global traffic charts can hide a market that is shrinking. Per-market data shows whether the agency has moved a non-English market on its own.

Then ask how they report against local competitors. Your rivals in Germany are often different companies from your rivals in the US. Our quarterly reports for the ecommerce marketing platform compare rankings, estimated traffic and AI answer presence against the main local rivals in each market.

Test the technical setup with a JavaScript-rendered crawl

Hreflang errors and rendering problems can wipe out a market without any visible warning. Google says each language version must list itself and every other version. It ignores hreflang tags when two pages do not point to each other (Google Search Central, updated September 2026).

Ask the agency how it checks rendering. During a content audit for an AI tax research platform, we found that its Canadian pages drew almost no traffic. A JavaScript-rendered crawl showed 99.9% of the Canadian answer pages redirecting client-side to their US versions, even though they returned a 200 status and carried hreflang tags. A plain crawl would have missed it. For a deeper look at the markup itself, see our hreflang guide.

Ask how they track AI search visibility in each market

AI search now reaches almost every market you might expand into. Google expanded AI Mode to more than 35 new languages and over 200 countries and territories in October 2025 (Google).

Language also changes which sources AI tools cite. In an analysis of more than 20 million ChatGPT fan-out queries, Peec AI found that 43% of the background searches for non-English prompts ran on the English-language web (Peec AI, February 2026). Your English pages can shape what ChatGPT says to a buyer in Madrid. Your Spanish pages still need to exist for the rest of those searches.

Ask the agency to show you how it writes prompts natively in each language and runs them from each country. Ask which tools it uses to measure brand presence and citations in ChatGPT, Perplexity, Gemini, AI Overviews and AI Mode. Our GEO and AEO service follows this per-market approach, and our guide on choosing an AEO partner lists more questions to ask.

Find out who leads the strategy after the contract is signed

Ask who will run your account each week and who will be on your monthly calls. Then ask how many other accounts that person manages. At some agencies, senior people lead the pitch and junior staff run the account afterward. Get the names of your strategist and your market leads in the contract or statement of work.

International SEO agencies compared

The best international SEO agencies

1. Flying Cat

Flying Cat is the founder-led boutique I run from Los Angeles. I lead the strategy on every account. Freelance specialists who know the client's vertical write and review the content, with native linguists for French, German, Italian and Spanish. Our French coverage includes French-speaking markets outside France.

Our international SEO service covers market research, native keyword research, localization and new content, technical audits and AI search visibility for each market. We also have dedicated pages for French, German, Italian and Spanish SEO.

Published results from our international programs include the following.

• ActiveCampaign. Its French, Italian, German and Spanish sites had little content, and brand searches drove their traffic. We localized the best English pages and wrote about twenty new bottom- and mid-funnel pages per language each month. In eight months, the four sites gained 83,000+ more non-branded clicks and 4.1M+ more impressions (case study).
• An ecommerce marketing platform. The budget covered about two new articles per market each month, with no link building. The client grew its top-3 keyword rankings in France 3.2x within six months. Organic conversions in France rose 60% in year one, with impressions up 506% and ranked keywords up 6.8x. After nine months in France, we launched its German blog from zero, and German blog traffic grew 108% in the first three months (case study). The client ranked first in AI answer presence among tracked competitors in all five of its markets.

Flying Cat fits B2B SaaS teams that want a senior strategist on every call and native content in a small number of priority European markets. We are a poor fit if you need twenty languages at once or a large in-house team in London.

2. Omniscient Digital

Omniscient Digital is a content-led SEO agency with US offices in Austin, New York, San Francisco, Chicago and Boston. Its services include SEO strategy, answer engine optimization, programmatic SEO, technical SEO, content production, link building, digital PR and analytics. Its own roundup of international SEO companies describes hreflang and localization work within its SEO programs and a team spread across six countries.

Named clients on its site include Jasper, Order.co, OnBoard, Smartling and 360Learning. Omniscient states that full-service engagements start at $120,000 per year. It suits larger B2B SaaS companies that want SEO, AI visibility and digital PR from one team, with international markets as part of a wider program.

3. Adapt Worldwide

Adapt Worldwide is a multilingual performance marketing agency and part of Welo Global, a localization services group. Its international organic search practice covers content SEO, technical SEO, app store optimization and AI SEO. On its content SEO page, Adapt describes a network of 80+ in-market specialists who produce and adapt content per market, managed through its Adapt Studio platform.

Adapt publishes one client story for a global technology brand across 7+ markets. It reports 55+ localized pieces and 105+ page optimizations, with impressions up 595% and key events up 113% in six months. Adapt suits enterprise brands that need SEO, paid media and localization across many markets through one vendor.

4. Orbit Media Studios

Orbit Media Studios is a Chicago web design and digital marketing agency founded in 2001 and a certified B Corp. Its international SEO page centers on strategy and site structure, including subfolders, subdomains, country-code domains and hreflang. Orbit analyzes rankings and link authority before recommending how and when to expand. Its page also states that international SEO does not suit every business.

Orbit's about page lists a team of 50+ people and says nothing is outsourced. It suits companies that are redesigning or rebuilding their website for new markets and want design, development and SEO from the same team.

London-based international SEO agencies

UK buyers who want a team in their time zone can read our separate list of London SEO agencies for international expansion. It covers London-based agencies with native-language teams for European markets, with pricing where the agencies publish it.

Signs you are ready to hire an international SEO agency

You are likely ready when one or more of these is true.

• Your home market already brings in steady organic signups or demo requests.
• Search Console shows impressions from countries you do not target yet.
• Sales or support teams are fielding inquiries in languages your site does not cover.
• Competitors outrank you in a market where you already have customers.
• Your multilingual or multi-domain site gets far less traffic than your English site.

Our international SEO strategy guide covers how to choose your first markets. If you plan to run part of the work in-house, read our list of international SEO mistakes first.

What international SEO agencies cost

Pricing depends on the number of markets, the amount of new content per market and whether the agency handles technical work. Omniscient states on its own site that full-service engagements start at $120,000 per year. Among the agencies on our London list, Pearl Lemon starts international campaigns at £3,000 per month with a three-month minimum.

Content volume drives cost more than anything else. ActiveCampaign's program produced about twenty new pages per language each month. The ecommerce marketing platform's program produced about two articles per market each month and still tripled its top-3 rankings in France by focusing on a few topic clusters at a time. Ask each agency how many pages per market its quote includes, who writes them and who reviews them in the market.

Frequently asked questions

How long does international SEO take to show results

Plan for three to six months before a new market shows steady movement. ActiveCampaign's results came over eight months. The ecommerce marketing platform tripled its top-3 rankings in France within six months. Its new German blog grew traffic 108% in its first three months.

How is international SEO different from translating my website

Translation converts existing copy into another language. International SEO starts with native keyword research and search intent in each market. It then decides which pages to localize, which to rewrite and which new pages to create. It also sets up hreflang and site structure so search engines serve the right version. Our multilingual SEO guide and international keyword research guide cover both steps in detail.

Talk to us about your markets

If you are planning a move into France, Germany, Italy, Spain or another French-speaking market, I can review your current setup and show you where your first gains would come from. Book a call and tell me which markets you are targeting.