Search for an international SEO agency and you'll find hundreds of firms advertising global reach, multilingual teams, and offices on three continents. Choice isn't your problem. The real problem is that the label covers at least three structurally different service models, and picking the wrong model — not the wrong logo — is how companies lose two quarters and a serious budget before noticing that nothing ranks in the market they actually care about.
This is a buying guide: the provider types, the evaluation criteria that predict results, the RFP questions worth asking, and what a healthy engagement looks like after signature. If you want the technical playbook itself, start with the complete international SEO guide. This piece is about buying the work well.
The three types of international SEO agency
Most providers fit one of three models. Each has a legitimate use case; the classic mistake is hiring one model while expecting the outcomes of another.
The global network agency
Holding-company networks and large independents with offices in a dozen countries. Their genuine strengths are coordination and governance: one contract, one methodology, consistent brand rules across fifteen markets, and a procurement process your legal team will recognize.
The trade-off is depth per market. Your account typically runs from a hub office, with local teams contributing a review pass rather than owning the work. Quality varies enormously between offices, and senior talent gravitates to the largest accounts. A mid-market company entering two or three countries will usually be a small fish in that pond.
Best for: enterprises launching in five or more markets at once, with in-house SEO leadership strong enough to direct the machine.
The local specialist per market
A specialist lives in your target market. The people doing keyword research and writing content are natives who buy things there, read the local press, and see those search results every day. They know which publishers will actually link to you, which competitors are gaining ground, and how buyers phrase the problem you solve. That phrasing is rarely a translation of how your domestic buyers phrase it.
The trade-off is coordination. Enter four markets with four specialists and someone (you, or a lead agency) has to align standards, priorities, and reporting.
Best for: companies with one to three priority markets where the revenue ambition justifies real depth.
The generalist with freelancers
The third model is your existing domestic agency bolting on freelance translators and link builders market by market. It's the cheapest option and occasionally the right one: translating support content, say, or probing whether a market searches for your category at all.
The risks are structural. Keyword lists get translated rather than researched. Links come from marketplaces. And when results disappoint, accountability dissolves somewhere between the agency and freelancers nobody manages. Treat this model as a probe, not a strategy.
For a fuller picture of what these engagements should include and the cost drivers behind them, see this breakdown of international SEO services.
How to evaluate an international SEO agency
Four criteria separate agencies that move revenue from agencies that produce activity.
Native-market teams, not translators
Ask one blunt question: who, by name, will do keyword research for our target market, and where do they live? Translation and localization are different jobs. A translated keyword list captures what your English terms mean; it misses how local buyers actually search, which modifiers signal purchase intent, and which questions dominate the local results pages. If an agency won't put the actual practitioners in front of you before signature, assume the work gets outsourced after it.
In-market case studies
An agency's results in its home market tell you little about yours. Ask for named case studies in your target market, reported in non-brand organic traffic and revenue, not ranking screenshots. If you plan to expand beyond one country, multi-market proof matters too. When we worked with BMW Europe Moto on its motorcycle spare-parts business, the SEO program opened six new markets, generated 55,000 organic visitors, and consolidated the site's Domain Rating at 70. That's the shape of evidence to demand: named clients, hard numbers, published publicly.
Technical depth
International sites fail in ways domestic sites never do: hreflang clusters that contradict each other, near-duplicate pages across same-language markets, ccTLD-versus-subdirectory decisions made by default instead of by design. Google documents how to signal localized versions of a page in its official guidelines, yet hreflang remains one of the most commonly botched implementations in SEO. Ask candidates to walk you through an implementation they inherited broken and fixed. Strong teams have war stories. Weak ones have slideware.
Measurement discipline
Ask what the first monthly report will contain. The right answer includes a brand versus non-brand split, per-market segmentation, conversions or revenue attributed to organic search, and a baseline agreed before work begins. The wrong answer is a rankings dashboard. Rankings are diagnostics, not outcomes, and an agency that leads with them is telling you what it wants to be judged on.
The case for a local specialist in your target market
Full disclosure: this is the model Junto runs for France, so weigh the argument accordingly. But the argument stands on its own.
Organic search is won on details only residents see. Which comparison sites and trade publications carry authority. How seasonality actually falls: in France, you plan around the regulated soldes periods and the August slowdown, not just Black Friday. What level of language quality readers will forgive: in French, the tolerance is close to zero, and copy that reads as machine-translated quietly kills both conversion and link-worthiness. A hub team in London or New York can learn these things secondhand. A local team never had to learn them.
The pattern shows up in results. When we took over SEO and link building for Gadero, a European e-commerce retailer of outdoor wood products, non-branded organic traffic grew 105% and revenue attributed to SEO rose 59%. For Galeries Lafayette's fine-food arm, Le Gourmet, the same in-market approach multiplied organic traffic five times, lifted top-3 keyword rankings by 334%, and grew revenue 93%. Those are French-market numbers produced by people who work in French every day.
The honest caveat: a local specialist is the wrong choice if you need eight markets orchestrated under one roof and nobody internal to coordinate. In that case, hire the network, or hire a specialist for your two priority markets and accept lighter coverage elsewhere. If France is one of those priorities, our piece on choosing a French SEO agency goes deeper into what to look for.
RFP questions that separate contenders
You don't need a forty-page RFP. You need eight questions whose answers are hard to fake:
Who, by name, will run keyword research and content for our target market, and in which country are they based?
Show us two case studies in our target market, with non-brand traffic and revenue impact you're willing to publish.
Walk us through an hreflang or migration problem you inherited and fixed. What did you find, and how long did it take?
How do you earn links in our target market? Name the publisher categories you work with, and tell us what you refuse to buy.
What happens in the first ninety days, before any content ships?
How will reporting be segmented by market and by brand versus non-brand?
What is explicitly out of scope at this price?
If we add a second market next year, what changes in team, process, and cost?
Listen for specificity. A strong agency answers question four with types of publications and an explanation of editorial outreach; a weak one says "we have a network." A strong agency answers question five with an audit-and-foundations plan; a weak one promises content volume from week one.
Engagement structure and what good reporting looks like
Most credible engagements follow the same arc. A paid audit and roadmap phase first: technical review, market-by-market keyword research, competitive analysis, and a prioritized plan with forecasts you can hold them to. Then a retainer mixing technical fixes, content production, and link acquisition, usually organized as a pod per market. Resist the temptation to launch three markets simultaneously with a budget sized for one. Sequencing a single market properly, then rolling the playbook outward, nearly always beats spreading thin: you learn what works while the stakes are still contained.
One structural alternative worth knowing: if you have production capacity in-house and need direction rather than hands, an international SEO consultant can set strategy and quality-control local execution at a fraction of full agency scope. The consultant route fails, though, when nobody internal has time to execute. Strategy without shipping is a PDF.
On reporting, hold out for four things:
A per-market view, never a blended global number that hides which country is actually moving.
Non-brand organic traffic tracked against an agreed baseline, so brand campaigns don't inflate the SEO story.
Conversions, pipeline, or revenue attributed to organic search, per market, in the currency you budget in.
A shipped-work log: pages published, fixes deployed, links earned, so you can connect activity to outcomes.
Quarterly, expect a re-forecast, not just a recap. Markets shift, and a plan that never updates is a plan nobody is thinking about.
Frequently asked questions
How much does an international SEO agency cost?
Pricing scales with the number of markets, the competitiveness of your category, and how much of the work is genuine in-market production versus translation. Structures vary: most specialists charge a per-market retainer after a fixed-fee audit, while networks bundle markets into a program fee. Be wary of pricing that scales purely with word count. You're buying research, technical work, links, and senior review; content volume is the cheapest ingredient in the mix.
Should we hire one global agency or a specialist per market?
Count your priority markets and look at your internal bench. Five or more simultaneous markets with in-house SEO leadership favors a network. One to three markets carrying real revenue expectations favor specialists, coordinated either by you or by a lead agency. The worst outcome is paying network prices for translated depth, so decide based on where revenue is actually supposed to come from.
How long before international SEO shows results?
It depends on your starting authority, your technical state, and the competitiveness of the market; be wary of anyone who quotes a universal timeline. Expect a foundations phase before growth compounds, and know that markets where your domain already carries authority move materially faster than cold starts in a new language. What you can demand early is leading indicators: shipped fixes, indexed pages, first non-brand impressions in the target market.
Can our current domestic agency handle international SEO?
Test it with the RFP questions above rather than assuming either way. If they can name in-market practitioners, show target-market case studies, and explain where their links come from, possibly. If the plan amounts to translating your existing pages and pointing hreflang at them, you would be funding an experiment with your market-entry window.
Ready to talk about France?
If France is on your roadmap, the fastest way to pressure-test your plan is to put it in front of people who rank sites here every week. Junto has published more than 200 case studies, most with named clients and hard numbers, and we're happy to walk you through the ones closest to your situation. Talk to our team about where organic search fits in your market entry, or simply steal the RFP questions above and use them on everyone you shortlist — including us.
Founder and CEO of Junto
Founder & CEO of Junto, Étienne has been an entrepreneur and digital marketing consultant for over 15 years. An expert in Paid Media, SEO, Data, Automation, AI, Growth and Performance, he helps ambitious companies build high-impact growth strategies — generating lasting results and helping brands move forward in a constantly evolving digital environment.
