What are advertising agencies?

An advertising agency is a company that’s dedicated to assisting clients research, set up, and execute target advertising campaigns. These campaigns may include print ads, social media ads, paid search advertising, television ads, and more.

How do ad agencies get paid?

Top advertising agencies may have different ways of charging clients. Some may ask for a monthly retainer for ongoing account upkeep. Additionally, some firms could request to be paid a percentage of the ROI generated through the ads they create.

How can advertising agencies help my business?

Advertising agencies can help businesses educate their customers on their products and services. With an advertising partner, businesses can create memorable, measurable, and compelling strategies or campaigns. Advertising agencies also enable businesses to increase customer reach and build better brand awareness. By investing in advertising, businesses have a greater chance of gaining an advantage over their competitors.

What kind of ROI (return on investment) should I expect when hiring an advertising agency?

Businesses should anticipate seeing a tangible return on their investment when partnering with an advertising agency if the right measures and resources are implemented. Businesses should monitor key performance indicators (KPIs) such as customer acquisition cost (CAC), revenue growth, and return on ad spend (ROAS). Typically, these metrics don’t appear instantaneously after a campaign ends but rather after a few weeks or months.

Top 100 Advertising Agencies in London

The Best of May 2024

Advertising is crucial to educating consumers and promoting products or services. You can generate interest and give deeper insights into your brand if done correctly.

Jump to Most Reviewed Companies

List of the Best London Advertising Companies

Featured provider
- SmartSites
  (219 Reviews) 4.9
  - Timeliness
    4.9
  - Service Excellence
    4.9
  - Value
    4.8
  - Would Recommend
    4.9
  - $1,000+
  - 250 - 999 employees
  - Paramus, NJ
  SmartSites is a full-service digital agency located in Paramus, N.J. Founded in 2011, SmartSites has a team of nearly 100 designers, writers, developers, marketers, and problem solvers who work tirelessly to make websites successful. SmartSites offers its clients creative ways to build, plan, and promote their website. They focus on web design, PPC marketing, and organic SEO.
  
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511

Hall & Partners

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 250 - 999 employees
- London, United Kingdom
Hall & Partners is a. The midsize London, United Kingdom-based company was established in 2009. Their team provides.

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512

WeAre8

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- London, United Kingdom
Located in London, United Kingdom, WeAre8 is a small advertising and branding company. They provide advertising and branding and were launched in 2012.

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513

Serenity

(0 Reviews)

Not yet reviewed.
- $5,000+
- 50 - 249 employees
- London, United Kingdom
Serenity is an advertising company launched in 2005. The firm offers advertising, branding, marketing strategy, public relations, and more and has a midsize team. The firm is located in T'bilisi, Georgia.
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514

One Education

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 250 - 999 employees
- London, United Kingdom
One Education is a branding company. Their midsize team is located in London, United Kingdom. Their services include branding, advertising, marketing strategy, ecommerce marketing, and more. The agency was established in 2015.
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515

Sieragency

(0 Reviews)

Not yet reviewed.
- $5,000+
- 10 - 49 employees
- Twickenham, United Kingdom
Sieragency is a mobile & app marketing company headquartered in Twickenham, United Kingdom. The small firm was launched in 2010. Their team specializes in mobile & app marketing, social media marketing, advertising, email marketing, and more.
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516

Flywheel

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 250 - 999 employees
- London, United Kingdom
Advertising company Flywheel was founded in 2014. The firm specializes in advertising, branding, video production, corporate photography, and more and has a midsize team. The firm is in Baltimore, Maryland; Seattle, Washington; London, United Kingdom and Minato City, Japan.

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517

Ares Projects

(0 Reviews)

Not yet reviewed.
- $1,000+
- 50 - 249 employees
- London, United Kingdom
Ares Projects is a ecommerce marketing company. Headquartered in London, United Kingdom and Bristol, United Kingdom, their midsize team offers ecommerce marketing, advertising, and branding. The firm was established in 2021.
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518

Piper

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- City of London, United Kingdom
Piper, a small branding firm, is in City of London, United Kingdom. The team focuses on branding and advertising.
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519

Fill My Funnel

(0 Reviews)

Not yet reviewed.
- $1,000+
- 2 - 9 employees
- London, United Kingdom
Fill My Funnel is a. Their small team is in London, United Kingdom. The agency provides. The agency was launched in 2021.
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520

Stride Social ltd

(0 Reviews)

Not yet reviewed.
- $1,000+
- 2 - 9 employees
- London, United Kingdom
Stride Social ltd is a social media marketing company. The small London, United Kingdom-based agency was founded in 2021. Their services include social media marketing, mobile & app marketing, advertising, content marketing, and more.
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521

Integral Ad Science

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 250 - 999 employees
- London, United Kingdom
Established in 2009, Integral Ad Science is a midsize advertising company. Their services include advertising, branding, media planning & buying, and mobile & app marketing. The company is in Berlin, Germany; New York, New York; Chicago, Illinois and San Francisco, California.
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522

Boulder Group

(0 Reviews)

Not yet reviewed.
- $5,000+
- 10 - 49 employees
- london, United Kingdom
Established in 2011, Boulder Group is a advertising company. The agency provides advertising, marketing strategy, video production, branding, and more and has a small team. The agency is based in london, United Kingdom.

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523

Socialyze

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- London, United Kingdom
Socialyze is a London, United Kingdom-based social media marketing company. The small team specializes in social media marketing, advertising, marketing strategy, media planning & buying, and more and was founded in 2022.
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524

House of Marketers

(0 Reviews)

Not yet reviewed.
- $1,000+
- 2 - 9 employees
- London, United Kingdom
Advertising company House of Marketers was established in 2010. The small London, United Kingdom-based team offers advertising, market research, other marketing, marketing strategy, and more.
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525

Ecomscraper

(0 Reviews)

Not yet reviewed.
- $1,000+
- 2 - 9 employees
- London, United Kingdom
Ecomscraper, a pay per click agency, is headquartered in London, United Kingdom. The company focuses on pay per click, advertising, and marketing strategy and has a small team.The company was established in 2020.
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526

Allott and Associates

(0 Reviews)

Not yet reviewed.
- $1,000+
- 10 - 49 employees
- London, United Kingdom
Allott and Associates, a small advertising company, is based in Knaresborough, United Kingdom and London, United Kingdom. Launched in 1994, the team specializes in advertising, direct marketing, public relations, marketing strategy, and more.
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527

Prominence

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- London, United Kingdom
Advertising company Prominence was founded in 2014. Their small team is located in London, United Kingdom and focuses on advertising, social media marketing, search engine optimization, business consulting, and more.
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528

Excite OOH

(0 Reviews)

Not yet reviewed.
- $5,000+
- 2 - 9 employees
- London, United Kingdom
Excite OOH is a small media planning and buying company. The London, United Kingdom-based firm was founded in 2022. Their team offers media planning & buying, advertising, out of home design, and direct marketing.
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529

Brevia Consulting

(0 Reviews)

Not yet reviewed.
- $5,000+
- 10 - 49 employees
- London, United Kingdom
Brevia Consulting is a small public relations company. Founded in 1999, the firm is headquartered in London, United Kingdom. Their services include public relations, advertising, direct marketing, market research, and more.
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530

Interics Design

(0 Reviews)

Not yet reviewed.
- $1,000+
- 10 - 49 employees
- London, United Kingdom
Interics Design, an advertising company, is in London, United Kingdom. The small firm was established in 1986. Their services include advertising, branding, and digital strategy.
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531

MARODON

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- London, United Kingdom
Maradon is an advertising company. They offer advertising, branding, social media marketing, web design, and more and were established in 2023. Their small team is Odessa, Ukraine-based.

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532

Squared Pegs

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 2 - 9 employees
- London, United Kingdom
Squared Pegs, an advertising and marketing strategy company, was founded in 2023. The small London, United Kingdom-based team specializes in advertising and marketing strategy.
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533

Growth Marketing Group

(0 Reviews)

Not yet reviewed.
- $5,000+
- 2 - 9 employees
- London, United Kingdom
Growth Marketing Group, a marketing strategy company, was founded in 2023. The company focuses on marketing strategy, media planning & buying, advertising, sports marketing, and more and has a small team. The company is based in London, United Kingdom.
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534

Noem9 Studio

(0 Reviews)

Not yet reviewed.
- $5,000+
- 10 - 49 employees
- London, United Kingdom
Noem9 Studio is a small branding company. Headquartered in London, United Kingdom and València, Spain, the company was launched in 2012. Their services include branding, packaging design, advertising, web design, and more.
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535

The Croc

(0 Reviews)

Not yet reviewed.
- $50,000+
- 50 - 249 employees
- London, United Kingdom
The Croc is a branding agency. Established in 2008, the team specializes in branding, pay per click, and BI & big data consulting & SI. Their midsize company is located in London, United Kingdom.
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536

Sample Digital Lab

(0 Reviews)

Not yet reviewed.
- $1,000+
- 2 - 9 employees
- London, United Kingdom
Established in 2018, Sample Digital Lab is a small SEO agency located in London, United Kingdom. Their services include search engine optimization, pay per click, advertising, social media marketing, and more.
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537

Letterbox Distribution

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 50 - 249 employees
- London, United Kingdom
Letterbox Distribution is a midsize PR agency based in London, United Kingdom. They provide public relations, social media marketing, web design, ux/ui design, and more and were founded in 1987.
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538

Byter Ltd

(0 Reviews)

Not yet reviewed.
- $1,000+
- 10 - 49 employees
- London, United Kingdom
Byter Ltd is a social media marketing firm headquartered in London, United Kingdom. The small team specializes in social media marketing, advertising, branding, digital strategy, and more. The agency was founded in 2019.
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539

Two Circles

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 250 - 999 employees
- London, United Kingdom
Two Circles is a marketing strategy company founded in 2011. Their midsize team is located in London, United Kingdom and New York, New York and provides marketing strategy, content marketing, sports marketing, advertising, and more.
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540

Sports Revolution Ltd

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- London, United Kingdom
Sports Revolution Ltd, an advertising company, is based in London, United Kingdom. The small team offers advertising, media planning & buying, social media marketing, and sports marketing. The company was founded in 2000.
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