Short answer: SEO Engico is the top pick for SEO migration services if you want one team to build the new site and carry its rankings across, backed by a law firm it moved without losing rankings. SALT.agency suits large and international sites, SERP Masters fits teams that want one senior consultant building and testing the redirect map, and Koozai is the choice for UK businesses recovering from a migration that already went wrong.
A redesign, a new platform or a new domain is the quickest way to lose years of organic traffic in a week. Search engines have learned your URLs, your internal links and which pages deserve to rank, and a migration changes all of it at once. SEO migration services exist to make sure the rankings and links you have earned arrive on the new site intact: a full URL inventory, a redirect map, checks on staging, close attention on launch day and monitoring afterwards.
This list covers agencies and consultants that sell migration support as a defined service, checked against their own websites in November 2026. We looked at how each one benchmarks the old site, who builds and tests the redirects, what happens on launch day, how long monitoring runs and whether a price is published. None of them can promise zero movement, and the honest ones say so.
Disclosure: Kuma SEO is written by the team at SEO Engico, the agency ranked first on this list. No agency paid to appear here. We checked every other entry against the agency's own website in November 2026. Services and prices change, so confirm the details with an agency before you sign. More on how we work in our editorial policy.
At a glance: the 7 best SEO migration services
| # | Agency | Best for | Based in |
|---|
| 1 | SEO Engico | Businesses moving to a new site that want the build and the SEO in one team | London, UK |
| 2 | SALT.agency | Large, international and enterprise sites where a migration carries real risk | Leeds and London, UK, and Hingham, US |
| 3 | Ayima | Enterprise brands that want hands-on support on launch day itself | London, UK, plus North America |
| 4 | SERP Masters | Teams that want one senior consultant to build and test the redirect map | San Francisco, California, US |
| 5 | Koozai | UK businesses planning a relaunch, or recovering from one that went wrong | Hampshire, Lancashire and London, UK |
| 6 | StudioHawk | Shopify, WordPress, Webflow and headless sites that want direct specialist access | Atlanta, Georgia, US |
| 7 | Onely | Brands that want to protect their AI search visibility through a move | Wrocław, Poland |
How we picked
- Benchmarks before anything changes. You cannot judge a migration without a record of clicks, rankings, indexed pages and conversions on the old site. Good teams capture that baseline first and report against it after launch, page group by page group.
- Maps every URL that earns traffic or links. The redirect map should cover every URL with clicks, backlinks or conversions, one to one where possible, with old redirect chains collapsed so each URL resolves in a single hop.
- Tests on staging, then again on launch day. Many migration disasters are staging settings pushed live: a sitewide noindex, a robots.txt block, canonicals pointing at the wrong place. Ask for a staging audit and a launch-day checklist run against the live site.
- Stays for the weeks after launch. Google takes time to recrawl a moved site. Look for a defined monitoring period covering index coverage, 404s, crawl stats and priority pages, with a named person fixing whatever slips.
- Is clear about who implements. Some providers specify and check while your developers build, others implement. Either works, as long as you know which you are buying and your developers have time for it in the launch plan.
- Keeps tracking working through the move. Analytics and conversion tags often go missing on new templates, which leaves the migration unmeasured just when you need the numbers. Tracking should be tested before launch alongside the redirects.
The 7 best SEO migration services in 2026
Our top pick
1. SEO Engico
- Best for
- Businesses moving to a new site that want the build and the SEO in one team
- Based in
- London, UK
- Founded
- 2018
SEO Engico is a London agency founded in 2018 with website, ads, SEO and links in one team, which matters in a migration because the people building the new site and the people protecting its rankings are the same. It designs and builds WordPress and custom Next.js sites in-house, with tracking set up before launch. Migration and consolidation work sits on its Senior tier, from $7,500 a month, alongside competitive markets, larger sites and multi-brand work.
Its published migration proof is legal. For One Planet Migration Law, an Australian immigration firm, it moved the firm to a new site without losing rankings, then built coverage of the questions Australian migration applicants search. SEO Engico's published figure is 13,274 organic clicks from Australia in the latest quarter (Search Console, 30 April to 29 July 2026), growing every quarter since measurement began.
Before changing anything it looks at the website, ads and tracking, and its 30-day Revenue Baseline ($3,499) shows what organic search is actually worth in calls, forms and closed deals. That gives a migration a commercial benchmark rather than just a rankings snapshot, and every change can be approved in its client portal before it goes live.
What stands out
- One team for the new build, the redirects and the SEO, so nothing falls between suppliers
- Moved One Planet Migration Law to a new site without losing rankings
- Tracking set up before launch on the sites it builds
- Approve changes in its client portal before they go live
Worth knowing
- Migration work sits on its Senior tier from $7,500 a month rather than a fixed-price project, so a simple move with no URL changes may not need it.
- Its published migration case study is a single law firm site, so large ecommerce replatforms should ask how it would scope the redirect work.
See SEO Engico's SEO tiers, including Senior
No. 2
2. SALT.agency
- Best for
- Large, international and enterprise sites where a migration carries real risk
- Based in
- Leeds and London, UK, and Hingham, US
SALT.agency is a specialist enterprise SEO agency with offices in Leeds, London and Massachusetts, and site migrations are one of its named services. It backs the pitch with its own research: across more than 1,000 domain migrations it analysed, only 27% recovered their SEO traffic within 90 days.
The service runs across planning, execution and post-launch. It starts with a full audit of the current site and a step-by-step migration plan, then covers domain changes with a structured redirect plan, CMS transitions, URL architecture and mapping files, and technical details such as redirects, speed, crawl paths, metadata and sitemaps. After launch it monitors rankings, traffic, crawl data and site health. It works directly with your marketers, developers and project leads, and the page also covers keeping content findable by AI search tools.
What stands out
- Publishes its own research on how long migrations take to recover
- Covers domain moves, CMS changes and URL restructures
- Free tools on its site, including a bulk redirect generator and hreflang checker
Worth knowing
- No pricing is published, and its focus on enterprise and international brands means a small site may find it more than it needs.
No. 3
3. Ayima
- Best for
- Enterprise brands that want hands-on support on launch day itself
- Based in
- London, UK, plus North America
Ayima is a senior SEO consultancy with a London office and a North American base, and its migrations service is pitched at enterprise brands. Before the move it runs a technical audit to benchmark organic performance and inventory every valuable asset, from high-traffic URLs to backlink equity, then builds a migration blueprint with redirect maps, architecture recommendations, metadata preservation and QA checklists. It can also advise on choosing the new platform and what to ask developers and vendors.
On launch day it gives real-time support to validate redirects, check schema, sitemaps and indexation, and fix whatever breaks. Afterwards it tracks traffic, rankings, crawl stats and conversions, resolves indexing problems and delivers executive reporting with a roadmap.
What stands out
- Real-time launch day support while search engines start crawling the new site
- Advice on platform choice and vendor questions before the build
- Executive reporting after launch for senior stakeholders
Worth knowing
- Pricing is not published, and the service is aimed at enterprise brands.
- It works as an extension of your development and marketing teams, so your own developers still carry the build.
No. 4
4. SERP Masters
- Best for
- Teams that want one senior consultant to build and test the redirect map
- Based in
- San Francisco, California, US
SERP Masters is Andy Wang's agency, set up so that one operator runs every engagement, month to month. Its migration page is one of the most specific anywhere: a URL inventory ranked by Search Console clicks, Ahrefs backlink targets and converting pages, a performance baseline, a one-to-one redirect map with old chains collapsed to a single hop, a staging audit, a launch-day checklist crawled against the live site, post-launch monitoring and an AI search continuity check.
The method runs in five steps: diagnose, architect, execute, corroborate and measure. SERP Masters specifies and verifies while your developers implement, which keeps the checking independent of the build, and it says plainly that it does not forecast when rankings will settle.
What stands out
- The person who builds the redirect map also tests it on staging and on launch day
- Eight named deliverables, including legacy redirect clean-up
- Covers WordPress, Shopify, Magento, BigCommerce, Webflow, Drupal and headless builds
Worth knowing
- Your developers do the implementation, so results depend on them shipping fixes and on access to Search Console, GA4 and staging.
- It says it is a poor fit for a simple host move with no URL, template or domain change.
No. 5
5. Koozai
- Best for
- UK businesses planning a relaunch, or recovering from one that went wrong
- Based in
- Hampshire, Lancashire and London, UK
Koozai is a UK digital marketing agency that runs website migration SEO through what it calls the SAFE SEO Migration Method: scope, audit, fix and evaluate. Before launch it crawls and benchmarks the current site, reviews priority pages and maps redirects alongside planned content and navigation changes. During the build it works with developers and project managers so everyone knows who owns each task, tests redirects, canonicals, status codes, robots.txt and sitemaps, and sets up conversion tracking.
After launch it compares rankings, traffic, conversions and priority pages with the pre-migration benchmarks and gives a prioritised action plan. It also takes on projects already underway, or already live and losing traffic, and offers a free SEO Migration Risk Checker that returns a percentage risk score.
What stands out
- Free migration risk checker before you commit
- Emergency recovery for migrations that have already gone wrong
- Works as a consultant to an in-house team or runs the whole migration
Worth knowing
- Pricing is not published.
- Its migration service is written for UK businesses.
No. 6
6. StudioHawk
- Best for
- Shopify, WordPress, Webflow and headless sites that want direct specialist access
- Based in
- Atlanta, Georgia, US
StudioHawk is an SEO agency whose US team works out of Atlanta, and its migration service rests on one promise: no account managers, so you work directly with the SEO and technical specialists overseeing the move. It covers CMS transitions, redesigns, rebrands and international domain migrations, with experience across WordPress, Webflow, Shopify and headless frameworks, and says the work carries over technical foundations, link equity, structured data and visibility in AI search.
The process starts with an audit of the existing site and the planned migration to benchmark data and flag risks, then a migration roadmap built with your stakeholders, then implementation with real-time monitoring, and tracking of traffic, rankings and crawl errors after launch. It also handles enterprise sites with thousands of products.
What stands out
- Direct access to SEO and technical specialists, with no account managers
- Experience across WordPress, Webflow, Shopify and headless frameworks
- Free technical tools, including an AI bot access checker and robots.txt validator
Worth knowing
- No migration price is published, so expect a scoping call.
- Its process is described at a high level, so ask to see a sample migration plan.
No. 7
7. Onely
- Best for
- Brands that want to protect their AI search visibility through a move
- Based in
- Wrocław, Poland
Onely is a technical SEO agency in Wrocław that has shifted its focus towards AI search, and its migration service reflects that. Alongside the usual work on URL structures, redirects, link equity and structured data, it treats a migration as a chance to strengthen how AI systems understand and cite your content. Before the move it assesses which content appears in AI responses and which content relationships must be preserved. During the move it protects what works and looks for content to consolidate. Afterwards it monitors how the new site performs in AI answers.
It supports tech stack changes, redesigns, rebrands and internationalisation, and measures success by AI citation frequency and conversational query visibility as well as rankings and traffic.
What stands out
- Assesses AI visibility before the move, not only rankings
- Uses the migration to consolidate and improve content
- Also sells JavaScript SEO and traffic drop recovery
Worth knowing
- It does not change your website code directly. It provides guidance, plans and tools, and your developers and content team implement.
- Pricing is not published, and timelines depend on site size and complexity.
How to choose an SEO migration service
Bring SEO in before the new site is designed, not a fortnight before launch. The most expensive migration mistakes, such as cutting pages that carried rankings or changing every URL pattern without a mapping plan, get baked in at the design stage. Ask each provider when it wants to be involved, what access it needs and who will own the redirect map.
Then match the provider to the size of the move. A small site moving to a new theme with the same URLs needs a careful check, not an enterprise programme. A large catalogue changing platform, a domain change or several sites folding into one needs a team that has done it at that scale and will stay for the weeks after launch. If the new site is being built anyway, there is a lot to be said for one team owning the build and the SEO, so redirects and tracking are part of the build plan rather than a separate ticket nobody owns.
Questions to ask before you sign
- When do you need to be involved, and what access do you need from us?
- Who builds the redirect map, and who tests it on staging and after launch?
- What baseline will you record before anything changes?
- How long will you monitor the new site, and what happens if traffic drops?
- Do you implement the changes or specify them for our developers?
- What does it cost, and is post-launch support included?
Frequently asked questions
What are SEO migration services?
SEO migration services protect a site's rankings, traffic and links when its domain, platform, URL structure or design changes. The core work is a URL inventory and baseline, a redirect map from every old URL to its new home, checks on the staging site, verification on launch day and monitoring afterwards in Search Console and analytics.
How long does it take to recover traffic after a site migration?
It varies widely with site size and how many changes ship at once. SALT.agency's own research across more than 1,000 domain migrations found only 27% recovered their SEO traffic within 90 days. A well-planned move often sees a short wobble rather than a long dip, but nobody can honestly promise zero movement.
How much do SEO migration services cost?
Most providers quote per project after scoping, because the work depends on how many URLs change, the platform and how long you need monitoring. SEO Engico covers migration and consolidation on its Senior tier, from $7,500 a month. The other providers on this list do not publish migration prices, so expect a scoping call.
When should SEO be involved in a website migration?
As early as possible, ideally before designs and the new URL structure are signed off. That is when decisions about which pages to keep, merge or cut are made, and when redirect mapping can be planned into the build instead of being rushed in the last week.
What causes most traffic loss after a migration?
Missing or wrong redirects come first, followed closely by staging settings that go live by mistake, such as a sitewide noindex tag or a robots.txt block. Content and internal links cut in a redesign, and tracking tags missing from new templates, are the other usual causes.
Our verdict
Pick SEO Engico if you are moving to a new site and want one team to build it, carry the rankings across and measure what organic search brings in afterwards, backed by its migration for One Planet Migration Law. Choose SALT.agency or Ayima for enterprise and international moves, SERP Masters if you want one senior consultant checking your developers' work, Koozai if you are a UK business mid-recovery, StudioHawk for direct specialist access, and Onely if AI search visibility is the asset you most need to protect.
Talk to SEO Engico about SEO for your new site
