Top 100 On-Page SEO Companies in London

Coders Dev is a web design and mobile app development company based in London with offices in Singapore and Abu Dhabi, U.A.E. The company, founded in 2010, has more than 500 employees and provides web development and AI services. Coders Dev serves small and larger-sized companies in the health care & medical, hospitality & leisure, consumer products & services, financial services, gaming, telecommunications, automotive, manufacturing, and e-commerce industries. 

POLARIS is an SEO agency in London, England. Founded in 2009, they have about 10 employees that serve mostly small-business and midmarket clients in the business, education, and e-commerce sectors. Services include SEO, PPC, and UI/UX design.

NP Digital is a SEO company established in 2017. Their midsize team is in London, United Kingdom. The company offers search engine optimization, social media marketing, content marketing, email marketing, and more.

Catalyst is a full-service marketing agency and strategy consultancy based in Birmingham, England with an office in London. Since 2011, their team of less than 50 professionals has provided marketing strategy, digital strategy, and branding solutions for their small and mid-market business clients. They use frameworks such as Adobe and WordPress for their projects.

Cynosure Designs is a web development company in London, United Kingdom. The company specializes in web development, branding, digital strategy, social media marketing, and more and has a small team.The company was founded in 2005.

Signify Digital Ltd is an online marketing agency founded in 2017 in London. Their team of fewer than 10 employees caters to clients seeking SEO, PPC, social media marketing, and content marketing.

Established in 2021, Fractional Teams is a social media marketing agency. The small London, United Kingdom-based team offers social media marketing, content marketing, email marketing, conversion optimization, and more.

Digital Litmus is a marketing and digital agency based in London. Founded in 2015, their team of around 10 employees specializes in content marketing, digital strategy, and PPC.

A digital marketing firm based in London, ChannelDoubler was founded in 2003. Their team of fewer than 10 specializes in SEO, content marketing, web design, and e-commerce development. They serve small to midmarket businesses in the e-commerce, hospitality, and leisure industries.

The Good Marketer is a digital marketing agency in London, England. Founded in 2017, they have about 6 employees that serve small businesses in a wide range of industries. Services include social media marketing, SEO, and PPC.

Shape The Market is an advertising and marketing agency that has been offering social media marketing, content marketing, and email marketing services to their clients since 2014 . Their 50 employees are based out of their London office.

Webdesign7 is a digital marketing agency based in London. Founded in 2011, their team of 8 specializes in web development and design, mobile app development, and digital strategy. The industries they focus on are advertising and marketing, consumer products and services, arts, entertainment and music.  

Web Bureau is a web agency headquartered in Belfast, United Kingdom, with an office in Dublin, Ireland. Since 2005, the company has specialized in web development, pay-per-click, and web design solutions for small and midmarket businesses. They also offer SEO services, focusing on mobile optimization, on-site optimization, and local search, among other methods.

Trustcorp is an SEO agency that offers services in SEO, PPC, and digital strategy. The one-employee firm got started in 2008 and is headquartered in London with a second office in New York. They specialize in multilingual services, content development, and link earning and development to almost entirely small business clients.

Senioriz Agency is a web design company. They are located in istanbul, Turkey; Flushing, New York and Kassel, Germany and have a small team that specializes in web design, search engine optimization, e-commerce development, and branding. The agency was launched in 2016.

Codener is a software company based in London that was founded in 2016 and currently has more than 50 employees. They provide custom software, web, and e-commerce development solutions to clients ranging from startups to large companies in the fields of e-commerce, advertising, and business services.

Search Logistics is an SEO agency founded in London in 2019 with over 10 professionals. They provide SEO solutions to various clients.

Founded in 2016, Digital Web London is a SEO agency. Headquartered in London, United Kingdom, their small team provides search engine optimization, web design, mobile app development, and ux/ui design.

Modo25 Limited is a digital marketing firm based in Leeds, England, and founded in 2019. Their team of no more than 50 provides digital strategy, affiliate marketing, and SEO solutions for small and mid-market businesses alike.

Social media marketing firm Otter Labs is in London, United Kingdom. The agency focuses on social media marketing, branding, digital strategy, content marketing, and more and is small.The agency was founded in 2022.

Market Jar is a digital marketing and design agency that was founded in 2017 and is based in London. Their team of 3 employees specializes in SEO, advertising, and email marketing for primarily small business clients in the consumer products, retail, and e-commerce industries.

Blue Flamingo Solutions Inc. Is a small digital strategy company. They provide digital strategy, search engine optimization, web design, web development, and more and were founded in 1998.

Zest Digital Limited is a digital marketing company with offices in Oxford, London, and Birmingham, United Kingdom. The 13-person team’s services include content marketing, digital marketing, PPC, and SEO. Founded in 2010, they work primarily with small and midmarket businesses in the business services, manufacturing, and education industries.

Design Culture, a small branding agency, is located in London , United Kingdom. Established in 2006, the team provides branding, marketing strategy, web development, graphic design, and more.

Based in Southampton, United Kingdom, Elevate UK is a social media marketing company. The small company was launched in 2013. Their services include social media marketing, search engine optimization, pay per click, web design, and more.

Hydra Creative is a digital solutions agency based in Sheffield, UK, with an office in London. The agency, founded in 2009, is a team of less than 15 who provides marketing and digital strategy, content marketing, SEO, and PPC services to various businesses.  

Founded in 2018, Elevate Digital is a marketing and SEO agency based in London. They primarily work with small businesses in a variety of industries. Their team also provides web design services for WordPress websites.  

TK WebHosts is a web design agency in London, United Kingdom. The small company was launched in 2014. Their team offers web design, search engine optimization, IT managed services, web development, and more.

StudioHawk UK is a SEO company launched in 2019. Their small team is in London, United Kingdom. Their services include search engine optimization.

UClimb is a SEO company launched in 2018. The small London, United Kingdom-based team focuses on search engine optimization, pay per click, web design, and web development.