In-House SEO vs Agency | Customer Impact

By now you know that SEO is worth the effort. The next question is who does it. Do you hire someone, or do you outsource SEO? The short answer: a full-time hire fits if SEO plays a daily, central role and you have enough work to keep that person busy. Outsourcing fits if you want breadth, speed and continuity without carrying a full salary. But there is a third option most people forget. In this article we lay out the trade-off honestly.

Want to go back to basics first? Then read what SEO is exactly and how it works. Here we assume you have already made that choice and now want to know how to organise it.

Why this is not a simple choice

SEO is not a task you hang on one person the way you appoint a bookkeeper. It is a discipline that demands three very different things at the same time: technical knowledge of how a site is built and crawled, content knowledge of how your audience searches and buys, and building authority through links and mentions. Recently a fourth layer has been added: making sure you not only appear in Google, but are also cited by AI search engines such as ChatGPT, Google AI and Perplexity.

One person who can do all of that equally well is rare and expensive. That is exactly why the choice between in-house SEO vs agency is trickier than it looks.

The full-time hire: closeness and company knowledge

An SEO specialist on your payroll has real advantages. That person sits in your team, knows your product, your customers and your internal processes. They are at the table for every decision, can move quickly with sales and development, and build a deep understanding of your business over the months. For a company where search traffic is the most important acquisition channel, that daily presence is worth its weight in gold.

But weigh the downside honestly:

You pay a full salary. Plus holiday pay, social contributions, training and tools. SEO tools alone add up quickly.
You buy one profile. A strong technical SEO is rarely also the best content strategist or link builder. You end up filling the gaps externally anyway.
You carry the hiring risk. Finding good people takes months, and if that person leaves, all the knowledge they built up leaves with them.
When they are ill or on holiday, your SEO stops. One person is by definition a single point of failure.

A full-time hire therefore only really pays off if you have enough volume to keep that role busy and you can cover the gaps in their profile.

Do the maths in practice too. An experienced SEO specialist costs you not only a salary, but also the time to find them, onboard them and keep them up to date in a discipline that changes every year. In the months when the vacancy is open or the new hire is still getting up to speed, your growth stands still. That is a hidden cost that rarely appears on the payslip, but that you certainly feel in your pipeline. If you do deliberately choose internal, read how to build an in-house SEO team with the right roles, tools and budget.

Outsourcing to an agency: breadth and continuity

When you outsource, you do not buy a person but a team. You get technology, content, authority and strategy in one package, with back-up if someone drops out. You do not have to recruit, manage or invest in tools. And a good agency brings patterns it has seen at dozens of other companies.

The concern people rightly have: does the knowledge then stay outside your walls? That depends on how you organise it. An agency that only delivers little reports and never explains why keeps you dependent. An agency that takes your team through the reasoning builds knowledge that stays with you. Ask about that explicitly before you sign.

The other pitfall is distance. Sometimes there is an account manager between you and the people who actually do the work, which means context gets lost. A good SEO specialist works directly with your team, not through an intermediate layer that waters down the message.

The third option most people forget

The discussion is almost always framed as doing it yourself versus a freelancer versus an agency. But there is a fourth model: a fixed external team that works as an extension of your own marketing.

That sounds like an agency, but the difference lies in the way of working together. You work directly with the same people, month after month, so they get to know your business just as well as an employee would. At the same time you get the breadth of a team: a technical specialist, a content lead and someone who builds authority, instead of one person doing everything half well.

That way you combine the closeness and company knowledge of a full-time hire with the continuity and expertise of an agency. You do not pay a full salary, you do not carry hiring risk, and your SEO does not stop when someone is on holiday. For most B2B companies in a growth phase, this is the most realistic model. For a deeper overview of all the forms, read outsourcing SEO: agency, freelancer or specialist.

SEO as an acquisition layer, not a standalone task

Whichever model you choose, one principle weighs more than the structure: SEO must not become an island. The mistake we see most often is that search traffic is judged on rankings and visitors, while in the end it is about pipeline. An internal employee who steers on positions, or an agency that reports on traffic, can “perform well” for months without a single extra lead coming in.

That is why we see SEO as the acquisition layer of one orchestrated growth engine, optimised for pipeline and not for vanity numbers. Whether the work happens internally or externally, the question stays the same: how many leads and how much revenue does this deliver? Anyone who cannot answer that question costs you money, regardless of whether they are on your payroll.

There is another shift that influences your choice. More and more customers start their search not in Google, but at an AI search engine such as ChatGPT or Perplexity. Appearing there means you steer not only on rankings, but also on being cited in those answers. That demands an approach that brings content, technology and authority together. One internal generalist rarely manages that, and it is exactly on this point that the breadth of a team weighs heaviest.

An honest decision framework

Answer these four questions for yourself and you will know which way to go.

How much SEO work do you really have, structurally? Enough to fill someone full-time: consider a hire. Fluctuating or project-based: outsource or use a fixed external team.
What do you already have in-house? A marketing team that only lacks hands and specialism: top up externally. Nothing: a partner who takes it over completely.
How much risk can you carry? Can you afford it if one person leaves or drops out? If not, continuity weighs heavily and you do not choose a soloist.
What do you judge on? On positions and traffic, or on leads and revenue? The second answer determines far more than the choice between in-house and external.

Still hesitating between a soloist and a team? Then also read SEO freelancer or agency for that specific trade-off.

Think in return, not in cost

The biggest thinking error is reducing everything to the monthly figure or the salary. An underused internal role that delivers no leads is just as expensive as an agency bought too thin. Both cost you missed growth, and that is the most expensive item of all. So think in pipeline and leads, not in hours or euros per month.

Ready to choose?

Tell us what your marketing looks like now and what your goal is, and we will honestly tell you whether a full-time hire, outsourcing or a fixed external team fits your situation best. No sales pitch, just a clear trade-off. Book your free intake and within 24 hours you will hear where your opportunities lie.