Changing agencies does not have to cost you traffic
Many companies stay with a web agency they have outgrown for one reason only: the fear of losing rankings and traffic when the site is moved. That fear is justified, because a careless switch can erase years of SEO work in a matter of days. But with the right preparation you keep both your rankings and your visitors. Here is how to switch web agency safely, what you need to secure before the move, and exactly what it takes for your SEO to come along with you.
Why a site loses SEO during a switch
Google ranks individual pages, not whole websites in one lump. Every URL that ranks today has built up value over time through links, clicks and content. When a new agency rebuilds the site, it is precisely at the URL level that things break.
The most common reasons traffic drops after a switch are that old addresses disappear without being redirected, that content is trimmed or removed, and that the new site is accidentally blocked from indexing. None of them are caused by the switch itself, but by moving without a plan for SEO.
The good news is that all of this can be prevented. Ranking is not something the agency owns and takes with them when you part ways. It lives in your domain and your content, and both can follow you to a new provider.
Who actually owns your website?
Before you end a relationship you need to know what you actually own. This is the point where switches most often get complicated, because not everything is always registered to your company.
Go through the following before you tell your current agency you want to switch:
The domain. It must be registered with your company as the owner, not the agency. Check this with your domain registrar.
The code. Ask for a full copy of your site's source code, or access to the repository where it lives.
The content. Make sure you have an export of text, images and other material, independent of the agency's systems.
CMS and accounts. Get administrator access to the content system, analytics tools and Search Console.
DNS and hosting. Find out where the domain's DNS is managed, so the new agency can point traffic across at launch.
If you control the domain, code and content, you are effectively free to switch whenever you want. If any of that is missing, sort out that question before you plan the move.
How to move without losing SEO
Once ownership is settled, the move itself is about preserving what Google already values. The goal is simple to state: the new site should be at least as good as the old one on every address that ranks today.
Make sure the new agency carries the following into the build:
The URL structure. Keep the same addresses where you can. If they must change, map every old URL to a new one.
Titles and meta descriptions. Bring across the page titles and descriptions that already work in the search results.
Headings and content. Move the text in full. Trimming content is a common cause of losses.
Internal linking. Recreate the links between pages, so the site structure holds together as before.
Sitemap and robots.txt. Create a new sitemap and check that nothing accidentally blocks indexing.
Canonical and hreflang. If you have several language versions, the hreflang tags must be set correctly from the start.
Much of this is the same principle that applies when you build a brand new site. Our SEO checklist for new websites covers the fundamentals that matter just as much during a move.
301 redirects: the detail that decides everything
If you only remember one thing from this guide, let it be this. A 301 redirect is a permanent redirect that tells Google a page has moved to a new address. It carries most of the page's value across to the new URL.
When addresses change during a switch, every old URL that has traffic or links must be pointed with a 301 to its new equivalent. Miss that, and visitors and search engines hit error pages, and the value the page has built up is lost.
In practice the work starts with a list of all existing URLs, where each row is given a new destination:
Old URL
New URL
Action
/services/web-design
/websites
301 redirect
/blog/old-post
/articles/old-post
301 redirect
/contact-us
/contact
301 redirect
If an address stays unchanged, no redirect is needed. That is why it is almost always simplest to keep the old URL structure where you can, and only redirect the addresses that truly have to change.
Test and monitor after launch
A switch is not finished when the new site goes live. The first few weeks decide whether the move succeeded, and that is when you need to catch any problems early.
Submit the new sitemap in Google Search Console and request re-indexing.
Crawl the site for broken links and check that every redirect points to the right place.
Watch for 404 pages, so no old address ends up in a dead end.
Follow indexing and rankings in Search Console for a few weeks after the move.
Measure the site's speed, since performance affects both rankings and visitors.
A small dip in the first days is normal while Google re-indexes the site. If traffic falls sharply and stays down, it is almost always a missed redirect or an indexing block behind it, and both can be fixed after the fact.
A switch is the right moment to upgrade the tech
If you are moving your site anyway, it is worth asking whether the technology behind it still suits you. Many switches happen precisely because the old site feels slow, expensive to maintain, or hard to build on.
If you want to understand the differences, we have written an honest comparison of Next.js and WordPress with measured load times, and a guide to what a new website costs. For many companies, a switch is the moment to move from a heavy template to a modern, fast solution.
We prefer to build in Next.js when performance, SEO and the ability to keep building matter, but the right choice always depends on your needs. If you want to see how we think about modern websites, that is where it all starts.
Common mistakes to avoid
Ending the old agreement before the new site is ready and the redirects are in place.
Shutting down the old site straight away, before you have saved the content and mapped every URL.
Letting addresses change without a complete redirect plan.
Forgetting about images, PDFs and landing pages that also rank or are linked to.
Not checking who is listed as the domain owner until it is time to move it.
Conclusion
Switching web agency does not have to mean losing SEO. Your ranking lives in your domain and your content, and with the right preparation it comes along with you. Secure ownership of the domain, code and content, preserve what already works, and redirect every address that changes with a 301.
Done in a controlled way, the switch is not a risk but a chance to get a faster, better site without losing what you have built. If you are thinking of switching and want help moving your site safely, you are welcome to get in touch.
Not if the move is done right. Your ranking lives in your domain and your content, not with the agency. What causes a drop is broken URLs, removed content, or pages that can no longer be indexed. With 301 redirects and a preserved content structure, your positions come along with you.
You should, but check it before you end the relationship. The domain must be registered to your company, not to the agency. Also ask for the source code, access to the CMS, and an export of all your content. Without those, a switch can become needlessly difficult.
It depends on the size and complexity of the site. A smaller business site can be moved in a few weeks, while a larger site with many pages and integrations takes longer. What matters is not speed, but that redirects and content are handled carefully.
No. The whole point of a controlled switch is that you avoid starting over. Your domain history, your backlinks, and your indexed content are valuable assets that come with you when the move is done right.
The content can be exported and moved to a new solution, whether the new site is built in WordPress or in a modern framework like Next.js. Just make sure every old URL is either kept or pointed with a 301 redirect to the correct new page.
I am one of the founders of Developly and work as a software engineer with a focus on JavaScript. With 8 years of experience in both front-end and back-end development, I am passionate about building smart, modern web solutions. I am deeply involved in our projects and combine technical craft with an eye for what truly creates value for the client.
