SEO agency or in-house? An honest guide to help you decide

In e-commerce, few channels impact profitability as significantly as SEO. For the largest German online shops, organic search accounts for a median of 42.5 percent of total traffic (LEAP × SISTRIX, Autumn 2025). The ROI can be more than double that of paid search, as organic traffic does not require payment for every single click.

At the same time, SEO is becoming more difficult. Organic visibility in German e-commerce is stagnating—down a median of 0.73 percent over the last year—and AI search is further changing the rules of the game. For most shops, the question is no longer whether to invest in SEO, but who should do it: an internal team or an agency.

This article won't make the decision for you, but it will make it clear. We provide an honest look at when in-house is worth it, when an agency is the better path, and give you five questions to help you decide.

Inhalt:

  1. Why this decision matters
  2. When an in-house team makes sense
  3. When an SEO agency is the better choice
  4. The 5 key questions
  5. How LEAP works
  6. Your next step and FAQ
SEO
Strategy

Inhalt:

1. Why this decision matters

2. When an in-house team is worth it

3. When an SEO agency is the better path

4. The 5 decision-making questions

5. How LEAP works

6. Your next step and FAQ

SEO
Strategy

Executive Summary

  • SEO is a key driver of profitability: it accounts for a median of 42.5 percent of traffic, with a potential ROI more than double that of paid search (LEAP × SISTRIX, Autumn 2025).
  • In-house is worth it if you have sufficient traffic, budget, and existing or buildable expertise.
  • An agency provides methodology, experience, and speed immediately, without the need for you to build a team from scratch.
  • Five decision-making questions regarding expertise, speed, scale, knowledge development, and CRO integration will help you decide.

1. Why this decision matters

SEO is not a channel you can just run on the side. When nearly half of your traffic is organic, a significant portion of your revenue depends on the quality of your SEO efforts. A high organic share also reduces your reliance on rising ad costs and strengthens your margins.

At the same time, the days of easy growth are over. With market visibility slightly declining on average, standard work is no longer enough to gain market share. Those who succeed today work strategically and data-driven. This is what determines whether your team or an agency is the better choice, as both must be able to deliver at this level.

Takeaways

  • On average, SEO accounts for 42.5 percent of traffic and thus a large share of profitability.
  • The market is stagnating, which is why the quality of work determines market share.
  • The make-or-buy decision is a strategic one, not just an operational one.

2. When an in-house team makes sense

An in-house SEO team plays to its strengths when several conditions are met. You have enough traffic and revenue to justify the fixed costs of one or more full-time positions. You are able to attract and retain experienced professionals, which is no small feat in a competitive job market. Furthermore, you want to build SEO expertise permanently in-house because it is core to your business.

The advantage lies in proximity and control. An in-house team knows your products, your processes, and your data firsthand and can react quickly. The price for this is the time required to build it: recruitment, onboarding, tool costs, and ongoing training in a field that changes rapidly.

Takeaways

  • In-house is cost-effective when you have sufficient traffic, budget, and available expertise.
  • The gain is proximity, control, and long-term internal knowledge.
  • The effort lies in the setup: personnel, tools, and ongoing training.

3. When an SEO agency is the better path

An agency is the stronger choice if you need results before you could build your own team. It brings a proven methodology and experience from many shops to the table immediately, rather than having to gather it over years. Because it works on different projects in parallel, it recognizes patterns earlier and avoids mistakes that a single team would otherwise have to make themselves.

This path also makes sense if SEO is important to you but not your core competency, or if you want to closely integrate SEO with conversion optimization. More visitors only generate revenue if the site is also optimized for conversions. An agency that covers both gets more out of the same growth.

Takeaways

  • An agency provides methodology, experience, and speed without the need for internal setup time.
  • It recognizes patterns across many projects earlier than a single team would.
  • It is particularly strong when SEO and CRO need to converge.

4. The 5 decision questions

If you answer the following five questions honestly, it usually becomes clear which path is right for you.

  1. Expertise: How much reliable SEO experience do you currently have in-house?
  2. Speed: How quickly do you need measurable results?
  3. Scale: Do your traffic and revenue justify the fixed costs of an in-house team?
  4. Knowledge: Do you want to build SEO expertise in-house for the long term, or outsource it?
  5. Integration: Should SEO run in isolation, or work closely with conversion optimization?

The more often you lean toward "fast, no internal team, integrated with CRO," the more an agency makes sense. The more expertise, budget, and desire to build an internal team you have, the more worthwhile an in-house approach becomes. Often, the pragmatic path is a combination: starting with an agency and later transferring knowledge to your own team.

Takeaways

  • Five questions regarding expertise, speed, size, knowledge, and integration will tip the scales.
  • A hybrid model—starting with an agency and building internally later—is often the most pragmatic approach.

5. How LEAP works

If you are taking a closer look at the agency side: LEAP works in a data-driven way and integrates SEO and CRO. We generate more revenue from the same stream of visitors because we don't separate visibility from conversion. Our model can be structured based on performance, meaning we share the risk with you.

Honesty is key here. A good agency doesn't make you dependent on them. We work transparently with your team, share knowledge and data, and explicitly support you even if you want to build expertise in-house. We make our results verifiable through published case studies with real data. You can see how we work as an SEO agency in detail on our services page.

Takeaways

  • LEAP integrates SEO and CRO and works in a data-driven, performance-based manner.
  • We share knowledge openly with your team and do not create dependency.
  • Our published case studies provide the evidence.

6. Your next step

The five questions from section 4 serve as your checklist, regardless of which path you choose. If you want to find out where your biggest SEO leverage lies and whether an in-house team makes financial sense, a Initial consultation the fastest way forward. We will review your current situation and give you an honest assessment of which path makes the most sense for you.

FAQ

How much does an SEO agency cost? That depends on the scope. Common models include a monthly retainer, project-based billing, or a performance-based share. The cost is determined by competition, scope, and goals. It is best to clarify specific terms in a direct conversation, as they depend heavily on the individual case.

How long does it take for SEO to work? SEO is a medium- to long-term channel. Initial effects often appear after a few months, with the full impact building up over a longer period. If you need short-term spikes in revenue, it makes sense to combine SEO with other channels.

Can SEO be done entirely in-house? Yes, provided you have sufficient traffic, budget, access to tools, and experienced professionals. Many shops find success with a hybrid model: an agency provides the methodology and momentum, while the internal team takes on more responsibility over time.

What is the difference between an SEO agency and a CRO agency? SEO brings in more visitors, while CRO ensures that more of those visitors make a purchase. The strongest results come from combining both, because additional traffic only generates revenue if the site is optimized for conversions.

Tim Niemann
August 10, 2026
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