Company lists · Data refreshed September 2026

Top 25 Platform migration SEO agencies based in the United Kingdom

Name: Platform migration SEO agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 105 companies tracked

RevenueBase identified 105 platform migration SEO agencies headquartered in the United Kingdom as of September 2026 and tracks 447 professional contacts across them, including 124 with verified work emails. London is the largest hub.

This list covers platform migration SEO agencies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

105Companies

447Contacts tracked

124Verified emails

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The 25 largest platform migration SEO agencies based in the United Kingdom

Ranked by team size

Top 25 of 105 platform migration SEO agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to platform migration SEO agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sherbet Donkey	Partial evidence	Bromsgrove, United KingdomHQ checked Sep 29, 2026	11-50	47 contacts →
	Partial evidence “Sherbet Donkey is an SEO agency built for businesses that want sustainable, long-term growth from organic search.” Source: RevenueBase Database · checked Sep 29, 2026
2	Distinctly	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	38 contacts →
	Partial evidence “Distinctly is an independent digital marketing agency with a passion for SEO, paid media, digital PR and content.” Source: RevenueBase Database · checked Sep 29, 2026
3	Builtvisible	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	16 contacts →
	Indirect evidence “With more ways than ever for consumers to find your brand, we make you visible wherever they’re searching, going beyond best practice to build holistic search strategies for…” Source: RevenueBase Database · checked Sep 29, 2026
4	Boyd Digital	Indirect evidence	Glasgow, United KingdomHQ checked Sep 29, 2026	11-50	14 contacts →
	Indirect evidence “Based in Glasgow and with clients worldwide, Boyd Digital is a digital marketing agency that specialises in search engine optimisation, pay-per-click advertising, social media…” Source: RevenueBase Database · checked Sep 29, 2026
5	Fibre Marketing	Indirect evidence	Cheltenham, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “We help our clients understand that their websites can work just as hard as their sales teams.” Source: RevenueBase Database · checked Sep 29, 2026
6	Dream Digital	Partial evidence	Reading, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Partial evidence “Dream Digital is a digital marketing agency, with a passion for SEO, based in the heart of Reading, working with industry leaders across the globe.” Source: RevenueBase Database · checked Sep 29, 2026
7	Sierra SIX Media	Partial evidence	Billericay, United KingdomHQ checked Sep 29, 2026	1-10	8 contacts →
	Partial evidence “Sierra Six Media has grown into a Drum Recommends and award-winning digital marketing and SEO agency, supported by a strategic consultancy arm based in central London.” Source: RevenueBase Database · checked Sep 29, 2026
8	SEO Traffic LAB	Partial evidence	Lincoln, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Partial evidence “SEO Traffic Lab is a Lincolnshire based SEO & Digital Marketing Company focused on Performance Driven Digital Marketing with offices in Gainsborough, Lincolnshire and London.” Source: RevenueBase Database · checked Sep 29, 2026
9	Neural Edge SEO & PPC Agency	Partial evidence	Crewkerne, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Partial evidence “We build data-driven SEO strategies that help eCommerce businesses generate more organic traffic and online sales.” Source: RevenueBase Database · checked Sep 29, 2026
10	Straight UP Search	Indirect evidence	Great Doddington, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Indirect evidence “You deserve to be discovered when your ideal customer searches.” Source: RevenueBase Database · checked Sep 29, 2026
11	Tecmark	Indirect evidence	Salford, United KingdomHQ checked Sep 29, 2026	11-50	6 contacts →
	Indirect evidence “Tecmark is a creatively powered, search-led digital agency in Manchester - where we push the limits and generate long lasting results.” Source: RevenueBase Database · checked Sep 29, 2026
12	Horizon Digital Agency	Partial evidence	Leicester, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Partial evidence “Horizon Digital Agency is an integrated Digital and SEO agency, combining web design and development with leading SEO specialists.” Source: RevenueBase Database · checked Sep 29, 2026
13	Indigoextra	Partial evidence	Loscoe, United KingdomHQ checked Sep 29, 2026	11-50	5 contacts →
	Partial evidence “Indigoextra are multilingual SEO experts, helping clients in the UK and Europe thrive.” Source: RevenueBase Database · checked Sep 29, 2026
14	Dhillons Digital Marketing	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	5 contacts →
	Partial evidence “At Dhillon's Digital Marketing, we're more than just an SEO agency; we're your strategic partner in navigating the ever-evolving digital landscape.” Source: RevenueBase Database · checked Sep 29, 2026
15	Searchlight London	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	5 contacts →
	Indirect evidence “We don’t just optimise for Google and AI.” Source: RevenueBase Database · checked Sep 29, 2026
16	Bite Digital	Partial evidence	Manchester, United KingdomHQ checked Sep 29, 2026	11-50	5 contacts →
	Partial evidence “Bite Digital are web development experts specialising in Search Engine Optimisation (SEO).” Source: RevenueBase Database · checked Sep 29, 2026
17	Oxford Comma Digital	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Partial evidence “Oxford Comma is a search-first digital agency that works on SEO and digital design and build projects with SEO front and centre.” Source: RevenueBase Database · checked Sep 29, 2026
18	High Impact LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Partial evidence “High Impact is a strategic SEO consultancy led by Julian Saunders an award winning marketer with over two decades of experience helping ambitious brands grow through smart…” Source: RevenueBase Database · checked Sep 29, 2026
19	Both Birds	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Indirect evidence “At Both Birds we’re passionate optimisers, which means we'll always try to provide digital marketing solutions that solve more than one problem at a time.” Source: RevenueBase Database · checked Sep 29, 2026
20	Flatdot Marketing	Partial evidence	Liverpool, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “At Flatdot Marketing, we don’t just do SEO - we live and breathe it (sometimes, we even dream about it).” Source: RevenueBase Database · checked Sep 29, 2026
21	Marketing The Change Liverpool SEO & WEB Design	Partial evidence	Liverpool, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “WE BUILD + CREATE + SHARE Liverpool-Based SEO & Web Design Digital Marketing Agency Over 1485 Projects Completed For Over 350 Clients Worldwide Since 2015!” Source: RevenueBase Database · checked Sep 29, 2026
22	Neil Walker SEO And Digital Marketing	Partial evidence	Manchester, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “Neil A Walker SEO and Digital Marketing formed in 2012 by founder Neil Walker.” Source: RevenueBase Database · checked Sep 29, 2026
23	Digital Marketing Help	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Indirect evidence “We can help you to understand and optimise your website search visibility and increase your competitive positioning.” Source: RevenueBase Database · checked Sep 29, 2026
24	Digital Score LTD	Partial evidence	Warrington, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “While our colleagues at those OTHER SEO Agencies were busy going after Big Name Awards … We were busy with our heads down getting client results.” Source: RevenueBase Database · checked Sep 29, 2026
25	SEO Forensics	Partial evidence	Leeds, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “Not your traditional SEO agency.” Source: RevenueBase Database · checked Sep 29, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: platform migration SEO agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names platform migration SEO agencies.
Partial evidence: Its own public description names part of platform migration SEO agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name platform migration SEO agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 105 platform migration SEO agencies based in the United Kingdom

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Platform migration SEO agencies based in the United Kingdom at a glance

As of Sep 29, 2026

27.7%Verified-email coverage

4.3Average contacts per company

1-10Median size (employees)

28.6%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 105 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among platform migration SEO agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “platform migration SEO agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names platform migration SEO agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among platform migration SEO agencies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 124 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Platform migration SEO agencies by metro

Platform migration SEO agencies in London30

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names platform migration SEO agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many platform migration SEO agencies are there based in the United Kingdom?

RevenueBase identified 105 platform migration SEO agencies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Sherbet Donkey, headquartered in Bromsgrove, tops this list with the largest team on record.

Which city has the most platform migration SEO agencies?

London leads with 30 headquartered companies, followed by Birmingham (5) and Manchester (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 124 verified decision-maker contacts tracked across these 105 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.