Top Marketing Agencies in California

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Marketing United States California

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Top Featured Marketing Agencies

Fellow Partners
5
(8 reviews)
Your partner for commercial success.
Recommended
Top awarded
Welcome to Fellow Partners. We're an award-winning international brand and marketing agency helping businesses create commercial momentum through brand strategy, identity and integrated marketing campaigns. At Fellow, we believe great brands should do more than look good—they should drive growth. We combine strategic thinking with creative excellence to build brands, launch campaigns and deliver marketing that helps businesses win customers, increase sales and strengthen market position. Working as an extension of your team, we provide strategic and creative expertise across every stage of the customer journey, including: • Brand Strategy & Positioning • Brand Identity & Visual Design • Packaging Design • Brand Messaging • Copywriting • Marketing Strategy & Planning • Creative Campaign Development • Content Marketing & Creative Production • Account Based Marketing • Digital Marketing Campaigns & Websites • Media Planning & Buying • International Marketing & Transcreation • Campaign Reporting & Performance Analysis Whether you're launching a new brand, repositioning an existing one, or looking to generate more leads and sales, we create connected brand and marketing programmes that deliver real commercial impact. Our experienced team works across both B2B and B2C sectors, supporting clients throughout the UK , Europe , the US and wider international markets. By combining global strategic thinking with local market insight , we create brands and campaigns that resonate wherever your business operates. As an agile, senior-led agency, we integrate seamlessly with in-house teams or provide a complete outsourced brand and marketing solution. We focus on delivering work that is accountable, measurable and aligned to your commercial objectives. Visit our website and contact us to learn more about Fellow Partners and discover how we can help your business build a stronger brand and accelerate growth . www.fellow.partners
31 works in Marketing
Located in London, United Kingdom
From €3,000 for Marketing
Worked in Software & Computer Services (+11)
Speaks English, German(+1)
11-50 members
Service Innovation Group UK
(0 review)
Europe's leading Field Marketing agency
Service Innovation Group is a field marketing agency helping brands improve retail execution, increase sales, launch products, audit stores and deliver consistent customer experiences across the UK and Europe. We believe in doing business differently and doing business right. We operate across Europe and beyond, supporting major brands and growth while still offering the local autonomy, cultural insight, and personal connection that make work meaningful. We are proud to be a certified B-Corp, meaning we’ve met rigorous standards of social and environmental performance, transparency, and accountability. Our people-first culture has earned recognition from Great Place to Work for creating an inclusive, empowering, high-trust environment that our colleagues truly enjoy being a part of. Sustainability and Purpose at Our Core: From supporting brands launching into new markets to integrating work-life balance and community impact, SIG doesn’t just deliver projects we deliver purposeful work that makes a constructive difference. We are delighted that we are an accredited Living Wage Employer. This means that every member of staff working at Service Innovation Group will earn a real Living Wage. A People-Centred Culture: We invest in developing our teams, nurturing leadership, encouraging development, and fostering a workplace where every individual feels valued, empowered and proud to contribute. Join Service Innovation Group UK and become part of a business that values you as much as the clients we serve.
6 works in Marketing
Located in Watford, United Kingdom
From €1,000 for Marketing
Worked in Beauty (+4)
Speaks English
201-500 members
Sellucent
5
(6 reviews)
Your Amazon Growth, Decoded - Amazon PPC & Optimisation for UK + international brands
Highly recommended
Sellucent is a London-based Amazon growth consultancy built by former sellers who got tired of watching strong brands leave money on the table. We combine advanced AI analytics with hands-on expertise to turn your Amazon data into clear, actionable strategies that deliver measurable results.Whether you’re launching your first products or scaling an established brand, we focus on what actually moves the needle: lower ACoS, higher ROAS, improved conversion rates, and sustainable, profitable growth across the UK, EU, and international marketplaces. Core services include: AI-powered precision PPC management and bid optimisation Amazon DSP and full-funnel advertising Listing optimisation, keyword research & A+ Content Creative development and brand storytelling Inventory planning, account strategy, and brand protection Every recommendation is data-backed. We operate with radical transparency — you see exactly what we do, why we do it, and how it ties to revenue outcomes. No vanity metrics, no black-box reporting. Our results speak for themselves: clients have achieved 180%+ revenue growth in months, dramatic ACoS reductions (e.g. 42% → 18%), and conversion rate lifts from low single digits to 5%+. We’ve managed hundreds of millions in Amazon revenue across thousands of brands.Sellucent is the agency we wished existed when we were sellers ourselves — one obsessed with performance, partnership, and long-term growth. We only win when you win.
3 works in Marketing
Located in London, United Kingdom
From €3,000 for Marketing
Worked in Beauty (+3)
Speaks English
11-50 members

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