842 agencies indexed·Latest entry: 17 July 2026
Social Media Advertising for Startup · 14 agencies

Social Media Advertising agencies for Startup.

Social Media Advertising is paid placement on Meta (Facebook, Instagram), TikTok, LinkedIn, X, Pinterest, and Snapchat. Scope typically covers strategy, audience targeting, creative production, campaign setup, bid management, attribution, and reporting. It is the paid side of social, distinct from Social Media Marketing which covers organic content, community management, and influencer relations. This page shows every agency on AgencyIndex offering social media advertising for Startup.

At a glance
Showing 1-14 of 14 social media advertising agencies for StartupAll Social Media Advertising agencies
Mass Reach logo
Mass Reach
Independent·London·2-10 Employees·Verified

At Mass Reach, we help ambitious eCommerce and B2B companies turn ad spend into predictable growth. We've partnered with leading global brands to accelerate revenue through Google Ads, Meta Ads and LinkedIn Ads, supported by conversion rate optimisation to maximise ROI. Our work goes beyond campaign management, we build full-funnel growth systems that deliver measurable results, from lower custome

Supplyant logo
Supplyant
Independent·Northampton·11-50 Employees·Verified

Supplyant, a Northampton-based eCommerce marketing agency in the UK, stands out for its dedication to resolving intricate eCommerce challenges for businesses, thereby facilitating swift expansion through bespoke marketing strategies and proficient website development. Their two-decade-long collaboration with Google, coupled with an emphasis on customer experience, guarantees that each client benefits from a customised approach, triggering significant business evolution.

Launch Digital logo
Launch Digital
Independent·Glasgow·2-10 Employees·Verified

Launch, a dynamic marketing agency, operates from strategic locations in Glasgow, London, and Ayrshire. What distinguishes Launch is its distinctive blend of imaginative creativity and digital expertise, generating progressive communication strategies whilst proudly maintaining its status as a family-owned enterprise offering a bespoke touch. Providing an extensive array of services, Launch specia

Zinc Digital logo
Zinc Digital
Independent·Northampton·11-50 Employees·Verified

Zinc Digital of Northampton, UK, is a leading full-range digital agency renowned for its distinctive, collaborative method. Their strategic partnership with clients cultivates bespoke designs and plans that amplify each business's unique selling points (USPs), ensuring standout design and potent marketing. Their dedication to providing premium digital solutions is apparent in their extensive servi

SK logo
SK
Independent·Reading·11-50 Employees·Verified

SK is a global, full service marketing agency, with specialisms in financial services and technology. We support our clients in building and adapting marketing strategies for success. We deliver advertising, SEO & GEO, design, copy, email marketing, PR, research, strategic consulting, web design, CRM and data strategy, social media marketing and much more to act as an extension of your team. We ar

HeightOn logo
HeightOn
Independent·Brighton·2-10 Employees·Verified

Big On Better. At HeightOn, we do more than design and digital. We Switch On Business. Our hybrid agency integrates brand, marketing, and technology to deliver solutions that maximise brand impact, increase leads, and drive measurable results. Big On Growth We amplify brand visibility, enhance engagement, and turn clicks into conversions. Big On Strategy We don't just create; we solve, strategise

Elitehub Luxury Digital Agency logo
Elitehub Luxury Digital Agency
Independent·London·51-200 Employees·Verified

Deep and Unique Services at ELITEHUB Luxury Digital Agency ELITEHUB is a premier luxury digital agency specializing in a wide range of services tailored for high-end brands and affluent individuals. Our offerings encompass various facets of digital marketing and personal services, ensuring that our clients receive comprehensive support in achieving their goals.

Catalyst Content logo
Catalyst Content
Independent·Leicester·2-10 Employees·Verified

Based in Loughborough, Catalyst Content supports businesses in laying strong marketing foundations and driving growth. Acting as an extension of your team, they bring together strategy, social media, website content, email campaigns, design, and SEO/Google Ads to deliver a cohesive approach. Drawing on extensive experience across various industries, Catalyst Content offers flexible solutions desig

Mintense UK logo
Mintense UK
Independent·London·2-10 Employees·Verified

Mintense UK is a London-based performance marketing agency with over a decade of experience in multilingual SEO, Google Ads, PPC and social media advertising. Their native-speaker teams cover 16+ languages, delivering tailored digital campaigns that drive visibility, leads and international growth across the UK, Europe and the US.

Bidmark logo
Bidmark
Independent·Leeds·2-10 Employees·Verified

Our digital marketing agency specialise in the strategy and delivery of a range of performance focused digital marketing services such as SEO, PPC, Paid Social and Display campaigns. Working closely with our clients ensuring everything is measured and tracked, we continue to deliver the results that matter

Leads Brain LTD logo
Leads Brain LTD
Specialist·Manchester·51-200 Employees·Verified

Boost your local visibility with Google Business Profile optimization, SEO for small businesses, and responsive website development. We help businesses grow online with affordable SEO services, faster websites, and better Google rankings that bring in more local traffic and real leads.

Leopard Co logo
Leopard Co
Independent·Birmingham·11-50 Employees·Verified

We are Leopard Co! A new agency with a 20-year history created through two award-winning marketing communications consultancies - Big Cat and spottydog communications - joining forces. Now together, we offer clients a full service marketing agency with specialist skills across the marketing communications mix.

The Robin's Egg logo
The Robin's Egg
Independent·Shrewsbury·Verified

Digital marketing consultant helping people doing 'good' - from charities and non-profits, to sustainable business and high-quality, handmade products. SEO, Google Ads, Google Analytics, Microsoft Ads, Meta Ads, copywriting and more.

YellowInk Digital logo
YellowInk Digital
Independent·London·2-10 Employees·Verified

YellowInk is an SEO and digital marketing agency based in the United Kingdom (UK), dedicated to helping startups and small businesses grow online. We offer tailored services including SEO, content marketing, PPC, email marketing, social media management, social media advertising, website design & development, and LinkedIn marketing. Our focus is on delivering affordable, effective strategies that

Editor's note

AgencyIndex tracks 14 social media advertising agencies for Startup. The list above is filtered to that intersection and ordered with verified and featured listings first.

For the wider editor's view on social media advertising agencies in the UK, see the social media advertising service brief. For context on Startup as a sector, see the Startup industry brief. The pricing, timeline and red-flag notes below apply to social media advertising as a discipline; they do not change materially for Startup.

Typical cost
10-20% of spend
or £400-5,000/mo retainer

Single-platform boutique £400-1,500 · Mid-market £1,500-3,500 · Full multi-platform £3,500-5,000+. Hybrid models pair a £750-1,500 base with 10-15% above an agreed threshold. LinkedIn B2B sits at the top of the range due to higher CPMs.

Realistic timeline
Days to launch
2-6 weeks to stable performance

1-5 days audit + tracking · 3-14 days creative production · 1-3 days launch · 7-21 days learning phase · 2-4 weeks meaningful read on Meta and TikTok, 3-6 weeks on LinkedIn.

Red flags
6 to watch
in any pitch
  • · No in-house creative production - paid social is creative-led, weak throughput means slow learning
  • · Percentage-of-spend pricing with no committed monthly creative quota or testing cadence
  • · Avoids discussing iOS privacy, signal loss, Conversions API, or modeled conversions
  • · Cannot explain platform attribution windows vs GA4 or CRM, or how they reconcile the gap
  • · No first-party data integration - no CAPI, no Customer Match, no offline conversion imports
  • · Refuses to give the brand admin access to its own Meta Business Manager, TikTok account, or LinkedIn Campaign Manager
Frequently asked

What brands ask about social media advertising agencies.

The 5 questions our editors get most often, answered honestly. These apply to social media advertising as a discipline across every industry.

Curated by humans

UK paid social retainers in 2026 split three ways. Single-platform boutiques (Meta-only, TikTok-only) run £400-1,500 a month plus ad spend. Mid-market performance shops typically charge £1,500-3,500. Full multi-platform agencies covering Meta, TikTok, LinkedIn, and YouTube charge £3,500-5,000+, often on a percentage-of-spend basis between 10% and 20%. LinkedIn B2B specialists sit at the upper end because CPMs are higher and audiences smaller, so workload stays high even on modest spend.