13 Best ChatGPT Ads Agencies in London (2026)

Lengreo provides ChatGPT Ads services in London, helping businesses explore paid visibility and advertising opportunities across ChatGPT alongside its broader AI search and digital advertising expertise. Its work covers ChatGPT, AI Search Optimization, answer engine optimization, structured data, conversational content, and AI-focused intent mapping, complemented by paid advertising services such as PPC, Meta Ads, and LinkedIn Ads.

For B2B companies in London, Lengreo can be a relevant choice for ChatGPT Ads support when the goal is to combine paid visibility in ChatGPT with broader AI search and digital acquisition strategies. Its offering also includes AEO, GEO, and AI search optimization, allowing ChatGPT advertising activity to sit within a wider AI-focused marketing approach.

Key Facts:

• Best for: B2B companies combining ChatGPT visibility with broader demand generation
• Core services: ChatGPT ads, AI search optimization, AEO, GEO, SEO, PPC, Meta Ads, LinkedIn Ads, lead generation
• ChatGPT focus: Improving brand visibility and citations within AI-generated answers
• Paid media focus: PPC, Meta, and LinkedIn advertising
• Location: Eindhoven, Netherlands, with published work for UK clients
• Service distinction: Dedicated ChatGPT Ads management is not currently detailed as a standalone service on its public pages

Contact Information

• Website: Lengreo.com
• Phone: +31 686 147 566
• Email: [email protected]
• Address: Vrijstraat 9 C/D, 5611 AT Eindhoven, Netherlands
• LinkedIn: Lengreo
• Twitter: @Lengreo
• Instagram: @lengreo

Dentsu has one of the clearest connections to OpenAI advertising among agencies operating in London. Dentsu announced that it had been selected as a UK launch partner for the ChatGPT ads pilot and was working directly with OpenAI on early advertising experiences. Its initial UK client group included Hilton, Hiscox, Next, and Tesco across Carat, Dentsu X, and iProspect.

That position makes Dentsu particularly suited to larger advertisers that need ChatGPT Ads incorporated into wider media planning rather than treated as an isolated experimental channel. The London operation can connect conversational advertising with search, audience strategy, media buying, creative, technology, and measurement.

Key Facts:

• Best for: Large UK and international advertisers
• Core services: Media strategy, media buying, search, digital advertising, creative, data, and technology
• ChatGPT focus: Direct participation in OpenAI’s UK ChatGPT Ads pilot
• Initial pilot sectors: Retail, travel, finance, and health
• Location: London
• Notable strength: Official UK launch-partner relationship with OpenAI

Contact Information:

• Website: www.dentsu.com
• Email: [email protected]
• Facebook: www.facebook.com/dentsuUK
• Twitter: x.com/dentsuUK
• LinkedIn: www.linkedin.com/company/dentsu
• Instagram: www.instagram.com/dentsuuk
• Phone: +44 (0)20 7070 7700
• Address: Regent’s Place, 10 Triton Street, London NW1 3BF

WPP Media brings ChatGPT advertising into a much broader search and media framework. OpenAI identifies WPP as one of the agency partners supporting businesses purchasing ChatGPT ads, including work around campaign budgeting, bidding, and creative. WPP Media has also participated in OpenAI Ads pilot activity with clients across several industries.

Its own search strategy material specifically discusses testing ChatGPT ads alongside other emerging AI advertising platforms. This makes the agency particularly relevant to enterprise brands that want to compare ChatGPT with Google, Perplexity, social platforms, and other paid media rather than manage each channel independently.

Key Facts:

• Best for: Enterprise brands with complex multi-channel media programs
• Core services: Media planning, paid search, audience strategy, data, measurement, and emerging platform advertising
• ChatGPT focus: Pilot campaigns and ChatGPT Ads experimentation
• Approach: Integrates AI advertising into a broader Total Search strategy
• Location: London EMEA headquarters
• Notable strength: WPP is named by OpenAI as an agency partner for ChatGPT Ads

Contact Information:

• Website: www.wppmedia.com
• Twitter: x.com/WPPMedia
• LinkedIn: www.linkedin.com/company/wpp-media
• Instagram: www.instagram.com/wppmedia
• Address: 1 Southwark Bridge Road, London SE1 9HL

Contra Agency has developed a dedicated ChatGPT Advertising Agency service from its London office. Rather than grouping the channel under a generic AI marketing label, its offer covers conversational search targeting, AI brand audits and AEO, audience targeting, ad creative, campaign setup, tracking, and ongoing optimization.

The agency is particularly relevant to B2B and professional-service organizations because its broader client focus includes law firms, higher education, charities, science and research organizations, and professional services. Contra also combines the paid side with checking how frequently a company is already recommended organically by ChatGPT, allowing paid and AI-search visibility to be assessed together.

Key Facts:

• Best for: B2B and professional-service organizations
• Core services: ChatGPT Ads, conversational targeting, AEO, creative, tracking, and campaign optimization
• ChatGPT focus: Dedicated London ChatGPT advertising service
• Industries: Professional services, legal, higher education, charities, science and research
• Location: London
• Notable strength: Combines paid ChatGPT campaigns with AI brand visibility analysis

Contact Information:

• Website: www.contra.agency
• Facebook: www.facebook.com/ContraDigital
• LinkedIn: www.linkedin.com/company/contra-agency
• Phone: +44 20 8293 7740
• Address: 3rd Floor, News Building, 3 London Bridge Street, London SE1 9SG, United Kingdom

One Day Agency offers ChatGPT advertising as part of its integrated digital and media services. Its dedicated service covers the role ChatGPT should play within a wider media plan, ad messaging, performance signals, and the transfer of campaign learnings into other advertising channels.

The agency is a useful option for brands that do not want ChatGPT handled separately from paid search, social advertising, SEO, creative, media buying, and international campaigns. One Day has a physical London office in Soho as well as teams in Manchester and several European cities, giving it both local UK access and broader campaign coverage.

Key Facts:

• Best for: Brands combining ChatGPT Ads with creative and performance media
• Core services: ChatGPT Ads, paid search, social advertising, SEO, media planning and buying, and creative
• ChatGPT focus: Strategy, messaging, campaign learning, and performance marketing
• Client types: B2B and B2C advertisers
• Location: London office, with Manchester headquarters
• Notable strength: Integrated creative and media capabilities

Contact Information:

• Website: oneday.agency
• Email: [email protected]
• Twitter: x.com/oneday_agency
• LinkedIn: www.linkedin.com/company/oneday-agency
• Instagram: www.instagram.com/oneday_agency
• Phone: +44 020 7074 4314
• Address: 16 Great Chapel St, London W1F 8FL

Jellyfish takes a technology and measurement-heavy approach to emerging AI advertising. The company expanded the paid media capabilities of its Share of Model platform with AI Ads Optimization covering ChatGPT alongside Google Performance Max, TikTok, DV360, YouTube, and Reddit. This makes Jellyfish relevant for larger brands that are interested not only in running emerging AI media but also in understanding how advertising and wider brand activity affect their presence across AI-generated discovery.

Key Facts:

• Best for: Enterprise brands focused on AI advertising measurement and optimization
• Core services: Paid media, data, AI, creative, digital marketing, and measurement
• ChatGPT focus: ChatGPT included within AI Ads Optimization capabilities
• Technology: Share of Model
• Location: The Shard, London
• Notable strength: Connects ChatGPT with wider cross-platform media analysis

Contact Information:

• Website: www.jellyfish.com
• Facebook: www.facebook.com/JellyfishGlobal
• Twitter: x.com/jellyfishglobal
• LinkedIn: www.linkedin.com/company/jellyfish-online-marketing
• Instagram: www.instagram.com/jellyfishglobal
• Phone: +44 (0) 20 7390 0459
• Address: Floor 22, The Shard, 32 London Bridge Street, London SE1 9SG

Fusion Unlimited has a dedicated ChatGPT Ads service covering strategy and planning, audience and intent analysis, campaign activation, optimization, measurement, and reporting. The agency also connects ChatGPT activity with broader paid media, SEO, GEO, and analytics rather than positioning it as an isolated experimental campaign.

Its wider services span paid search, paid social, SEO, GEO and LLM search, display, programmatic advertising, YouTube, connected TV, and other media. Fusion maintains both Leeds and London offices, giving London clients access to a full-service digital agency with an established performance marketing operation.

Key Facts:

• Best for: Brands integrating ChatGPT Ads with search and wider digital media
• Core services: ChatGPT Ads, paid search, paid social, SEO, GEO, programmatic, and analytics
• ChatGPT focus: Strategy, targeting, activation, optimization, and measurement
• Location: London and Leeds
• Notable strength: Paid and organic AI-search capabilities within the same agency

Contact Information:

• Website: fusionunlimited.co.uk
• Email: [email protected]
• LinkedIn: www.linkedin.com/company/fusionunlimited
• Instagram: www.instagram.com/fusion_unlimited
• Phone: 0113 733 6184 
• Address: Level 2, 180 Strand, Surrey Street, Temple, London WC2R 1EA

Mass Reach is a London performance marketing agency with a dedicated ChatGPT Ads management service. It covers audience planning, creative optimization, campaign management, reporting, and ongoing testing, while its wider paid media operation includes Google Ads, Meta Ads, LinkedIn Ads, CRO, and email marketing.

This structure makes Mass Reach a practical option for small and mid-sized companies that want ChatGPT included within a performance-focused acquisition program. Its service is built around hands-on campaign management rather than only AI visibility consulting, and both B2B and B2C businesses are part of its stated client focus.

Key Facts:

• Best for: Small and mid-sized B2B and B2C advertisers
• Core services: ChatGPT Ads, Google Ads, Meta Ads, LinkedIn Ads, CRO, and email marketing
• ChatGPT focus: End-to-end campaign management and optimization
• Location: London
• Client types: B2B and B2C
• Notable strength: ChatGPT advertising sits within a performance marketing service set

Contact Information:

• Website: www.massreach.com
• Email: [email protected]
• LinkedIn: www.linkedin.com/company/massreach
• Instagram: www.instagram.com/mass_reach
• Phone: +44 20 8214 7198
• Address: Unit 118, Leroy House, 436 Essex Rd, London N1 3QP

Surgelify concentrates specifically on the emerging ChatGPT advertising and AI visibility market. Its public service covers campaign strategy, creative, deployment, optimization, and reporting, making the paid component considerably more explicit than at agencies that only provide GEO or AEO.

The company also offers white-label support for SEO, digital marketing, PR, and content agencies that want to add AI visibility or paid AI advertising without building a dedicated internal team. This makes Surgelify an unusual fit within the list, since it can work both directly with brands and behind other agencies. Its site identifies the team as UK-based in London.

Key Facts:

• Best for: Brands and agencies seeking specialist ChatGPT campaign support
• Core services: ChatGPT Ads strategy, creative, deployment, optimization, and reporting
• Additional service: AI visibility management
• Agency support: White-label services available
• Location: London, UK
• Notable strength: Narrow focus on ChatGPT advertising and AI visibility

Contact Information:

• Website: surgelify.com
• Facebook: www.facebook.com/Surgelify
• Twitter: x.com/Surgelify
• LinkedIn: www.linkedin.com/company/surgelify
• Instagram: www.instagram.com/surgelify

AdsGPT is built specifically around advertising and visibility across ChatGPT and other AI search platforms. Its services combine AI Search Optimisation, GPT Sponsored Listings, AI Brand Presence Audits, and white-label agency partnerships. The sponsored listings service covers campaign architecture, bid and creative testing, and conversion-focused reporting.

Unlike broader digital agencies adding ChatGPT to a long service list, AdsGPT presents AI advertising as its central proposition. Its stated target groups include ecommerce companies, local and service businesses, and agencies. This narrow focus may suit organizations that want a specialist team rather than a large media network with multiple unrelated channels.

Key Facts:

• Best for: Ecommerce businesses, service companies, and agencies
• Core services: AI Search Optimisation, GPT Sponsored Listings, AI brand audits, and white-label support
• ChatGPT focus: Paid placements combined with organic AI-search optimization
• Location: London, United Kingdom
• Agency model: Specialist AI advertising provider
• Notable strength: Organic and paid AI visibility managed together

Contact Information:

• Website: adsgpt.co.uk
• Email: [email protected]

GAMEPLAN. operates as a West London performance, media, and technology group. Its paid media service explicitly includes ChatGPT Ads alongside Google, Meta, Microsoft, and Amazon advertising, while its search practice covers SEO, AEO, GEO, and wider AI search visibility.

That combination gives companies a way to work on both sides of AI discovery: paid placement through ChatGPT advertising and organic visibility through answer and generative engine optimization. GAMEPLAN. also handles CRO and websites, which can be useful when campaign traffic needs dedicated landing-page or conversion work rather than media management alone.

Key Facts:

• Best for: Companies combining AI search, paid media, and conversion work
• Core services: ChatGPT Ads, Google Ads, Meta Ads, Microsoft Ads, SEO, AEO, GEO, websites, and CRO
• ChatGPT focus: Paid placement inside AI responses
• Location: Brentford, West London
• Broader capability: Performance marketing, media, and technology
• Notable strength: Paid and organic AI-search services within one team

Contact Information:

• Website: hellogameplan.com
• Email: [email protected]
• Phone: +44 7747 151663

Boost Marketing includes ChatGPT Ads within a broad paid-media channel mix covering Google, Meta, LinkedIn, TikTok, YouTube, Microsoft, Reddit, X, and other platforms. It also provides SEO and AI visibility services, CRO, website management, Amazon Marketplace support, and ecommerce-focused marketing.

The agency is especially relevant to ecommerce and B2B businesses that want to test ChatGPT without separating it from their existing acquisition channels. Its stated specialisms include ecommerce, software and SaaS, and property and real estate, while the business lists London and Cape Town as its operating locations.

Key Facts:

• Best for: Ecommerce, SaaS, and B2B companies
• Core services: Paid media, ChatGPT Ads, SEO and AI visibility, CRO, and website management
• Advertising channels: Google, Meta, LinkedIn, TikTok, Microsoft, Reddit, X, YouTube, and ChatGPT
• Industries: Ecommerce, software and SaaS, property and real estate
• Location: London and Cape Town
• Notable strength: ChatGPT can be managed alongside a wide paid-media portfolio

Contact Information:

• Website: www.marketwithboost.com
• Email: [email protected]
• LinkedIn: www.linkedin.com/company/market-with-boost
• Instagram: www.instagram.com/marketwithboost
• Phone: +44 789 598 0003

CNS Media has created a dedicated ChatGPT Ads service specifically for businesses targeting London. Its team handles strategy and setup, conversational targeting, ad copy and creative, bid and budget management, campaign optimization, performance tracking, and integration with existing PPC, paid social, and SEO activity.

The agency itself is headquartered outside London, so it differs from firms with central London offices. However, it explicitly markets and delivers ChatGPT Ads management for the London market and has dedicated London and Chelsea service coverage. Its wider paid-media background includes search, paid social, programmatic advertising, and SEO.

Key Facts:

• Best for: London businesses wanting managed ChatGPT campaigns alongside existing digital channels
• Core services: ChatGPT Ads, PPC, paid social, SEO, programmatic advertising, and media strategy
• ChatGPT focus: Strategy, targeting, creative, budget management, tracking, and optimization
• London coverage: Dedicated ChatGPT Ads services for London businesses
• Head office: Chesterfield, UK
• Notable strength: Integration of ChatGPT Ads with established PPC and SEO activity

Contact Information:

• Website: www.cnsmedia.co.uk
• Email: [email protected]
• Facebook: www.facebook.com/CNSMediaLtd
• LinkedIn: www.linkedin.com/company/cns-media-ltd
• Instagram: www.instagram.com/cnsmedialtd
• Phone: 0800 031 6647
• Address:  CNS Media, Spire Walk, Chesterfield S40 2WG