International SEO Companies
I would not hire an international SEO company that cannot show me a working hreflang audit for a market I actually care about.
Start here
- Audit your existing hreflang tags and Search Console international targeting report before contacting any agency.
- List your top three target markets and check their dominant search engines — Baidu, Yandex and Naver have different rules.
- Ask potential agencies for a worked example using your site's data, not a generic pitch deck.
- Budget for separate keyword research per market; direct translations rarely match local search intent.
- Test a single market with a pilot project before committing to a multi-market retainer.
Plain-English take
An international SEO company does not translate your site into French and call it a day. That is multilingual SEO, which is a subset. The real job is making your content discoverable in markets where search behaviour, dominant engines and cultural expectations differ. I have seen a UK fashion brand spend £8,000 a month on what they called "international SEO" only to find that the agency had set up hreflang incorrectly and was serving German users the English version because canonical tags pointed to the wrong URL. A good partner will first audit your site architecture — ccTLD, subfolder or subdomain — then map hreflang annotations per language and region. They will also do market-specific keyword research because a direct translation of "running shoes" might be the term in Germany, but in Japan users search for "jogging shoes" written in katakana. They build local links and manage digital PR in each market, which is something you cannot scale with a translation plugin. I once worked with a UK athleisure brand that wanted to enter Japan. A generalist agency had used machine translation and kept the .com domain. After six months, Japanese traffic was under 200 visits per month. We switched to a firm that understood Rakuten and Yahoo Japan behaviour. They set up a /ja/ subfolder, rewrote product copy to match local sizing concerns, and built links from local fitness blogs. Within three months traffic hit 4,500 visits. The cost was £6,000 per month, but the ROI was clear. The best choice is a firm that specialises in your target region's search engine, not just Google. If you are going after China they should understand [Baidu SEO](/baidu-seo/) and ICP licensing. If Russia, [Yandex Search Engine](/yandex-search-engine/)'s weight on region and URL structure. The cost is high — often £3,000 to £15,000 per month per market — but the alternative is throwing money at translated pages that never rank.
When it actually matters
It matters the moment your current site starts attracting organic traffic from a country you do not serve properly. Check your Search Console by country. If Germany sends you 5,000 clicks a month but your bounce rate is above 80%, you have a localization gap, not a translation gap. Another edge case: you are launching a second product line in Brazil and need to handle local pricing, payment methods like boleto, and a .com.br domain. Without an agency that knows Brazilian search intent, you will rank for "tenis" (tennis shoes) instead of "tênis" with the tilde. A counter-argument: some small B2B software companies succeed with English-only content because their buyers are technically literate. But if you are a dentist booking service expanding to Dubai, you need Arabic SEO and knowledge of Google UAE's preferences. Decision rule: if your target market has a different dominant search engine or a language with script differences such as Cyrillic, Chinese or Arabic, do not attempt it without a specialist. Even within Google, countries rank differently — I once saw a German Google SERP prioritise .de pages over .com even when hreflang was correct, because the agency had not built country-level links. That is when you need a partner who can do genuine [international link building](/international-link-building/) and local outreach. Another situation: you already have translated pages but they are not ranking because [Multilingual SEO](/multilingual-seo/) without technical setup is half the job. If you are seeing traffic from other countries that bounces immediately, that is a signal that the content feels culturally off, not just literally wrong. Finally, if you need to handle multiple currencies and legal requirements per market, an agency experienced in [Localization SEO](/localization-seo/) can avoid compliance headaches that a pure translator would miss.
What I got wrong
I used to think that launching a translated version of my site would automatically capture traffic. I spent £500 on a translation service and saw zero movement in rankings. The mistake was ignoring search intent — "cheap flights" in the UK becomes "billige Flüge" in Germany, but Germans also search "Flugsuche" and "günstige Reisen". I was targeting the literal translation. I also assumed hreflang was a nice-to-have. I removed it once to "simplify" the site, and Google started showing the English page to Spanish users. That cost me six weeks of recovery and lost that market entirely for a quarter. Another error: I reused the same keyword research for all markets. In the US, "insurance" is high volume; in India, "insurance plans" and "life insurance policy" are separate queries with different intent. I should have done separate [International SEO Keyword Research](/international-seo-keyword-research/) per market. I also underestimated the importance of local hosting and IP addresses. For Baidu SEO, if your server is outside China, you will be slower and harder to index. An agency that offers Baidu-specific services would have warned me. Finally, I thought [International SEO](/international-seo/) was something a generalist could learn in a weekend. It is not. The technical nuance — from hreflang validation to region-specific schema — requires dedicated specialists. Now I treat it as a distinct discipline, not an add-on. I keep a spreadsheet of country-specific SERP features and update it every quarter.
Next step
Quick answers
How do I evaluate an international SEO company before hiring?
Ask for a case study in your specific target market. Request a sample hreflang audit using your site’s URLs. Check if they have native speakers on staff or subcontract to local writers. Avoid agencies that pitch translation as the main deliverable.
Is it cheaper to do international SEO in-house versus hiring an agency?
In-house is only cheaper if you already employ native-speaking SEOs with technical expertise in multiple engines. Otherwise, the agency cost of £3,000–£15,000 per month is less than the trial-and-error cost of getting hreflang wrong or building the wrong links.
Do I need separate domains for each country?
Not always. Subfolders with correct hreflang work well for most sites. ccTLDs signal stronger geotargeting but increase management overhead. Choose based on budget and whether you need local hosting for engines like Baidu or Yandex.
Sources
Primary documentation is linked directly. Anything commercial is marked nofollow.
- Google Search Central: Managing multi-regional and multilingual sites — Primary reference for hreflang, site architecture and international targeting best practices.
- Google Search Central: Locale-adaptive pages and translated content — Clarifies the difference between translation and localization, which is the core mistake I made.
- SEOWorks: Best International SEO Companies — Provides current industry overview of what agencies offer and typical pricing ranges.
Notes from Callum Bennett.