The Ultimate List of 50 Digital Marketing Agencies with Public Proof of Work

In the fast-moving digital economy of 2026, a slick website is no longer enough to win a client’s trust. Modern businesses demand "proof of work, "tangible evidence that an agency has faced similar challenges and delivered measurable results. This list highlights 50 of the world’s most reputable digital marketing agencies, ranging from global holding company giants to boutique performance powerhouses. Each of these firms maintains a public portfolio or a library of verified case studies, allowing you to audit their performance before making first contact.

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WebFX

WebFX is a performance-driven agency known for its massive, transparent library of over 1,000 client testimonials and hundreds of detailed case studies. They utilize their proprietary ROI-tracking platform, MarketingCloudFX, to provide clients with real-time data on lead generation and revenue growth. Their public records showcase work across diverse industries, from heavy equipment to e-commerce, consistently highlighting high double-digit increases in organic traffic. They are the gold standard for mid-market businesses seeking an agency that treats marketing as a pure math and revenue game.

Thrive Internet Marketing Agency

Headquartered in Texas, Thrive has built a global reputation by publishing comprehensive project breakdowns that span SEO, PPC, and web design. Their public proof of work often includes specific metrics like a 500% increase in conversion rates or a 300% boost in organic keyword rankings for local and national brands. They maintain a high level of transparency by detailing the exact strategy used for each client, from technical audits to content execution. Thrive is ideal for businesses that want a full-service partner with a visible track record of scaling small-to-mid-sized operations.

Disruptive Advertising

Disruptive Advertising is a leader in the paid media space, managing hundreds of millions in ad spend with a public focus on "eliminating wasted spend." Their case studies are remarkably detailed, often showing how they restructured underperforming Google Ads accounts to achieve a higher return on ad spend (ROAS) within 90 days. They lean heavily into conversion rate optimization (CRO), showing public proof of how landing page tweaks directly impacted their clients' bottom lines. They are the top choice for companies looking to audit their current ad spend and see immediate, verified improvements.

Power Digital

Power Digital is a data-science-led agency that uses its proprietary "nova" platform to identify growth opportunities for high-end and enterprise brands. Their public portfolio features work for major names like Casper and Lord & Taylor, demonstrating their ability to handle complex, multi-channel strategies. They are unique in providing "Growth Audits" as public proof of their analytical depth, showing how they uncover hidden revenue in existing marketing funnels. This agency is best for brands that require a sophisticated, technology-backed approach to scaling digital revenue.

NP Digital

Founded by marketing icon Neil Patel, NP Digital is a global performance agency with a massive public footprint and a focus on content-led SEO. Their case studies often highlight how they help enterprise-level companies dominate search results through aggressive, data-backed content strategies. They provide transparent reporting on how they increase organic traffic and lead volume for brands like Adobe and Western Union. NP Digital is the go-to firm for organizations that want to leverage world-class search expertise and a massive team of global specialists.

Ignite Visibility

Led by industry expert John Lincoln, Ignite Visibility is consistently ranked as a top agency for SEO and paid media due to its highly analytical approach. Their public proof of work includes "The Ignite Framework," a transparent methodology they apply to every client to ensure consistent, predictable growth. They share detailed success stories involving complex franchise marketing and multi-location SEO, proving their ability to manage intricate account structures. They are perfect for businesses that value thought leadership and a structured, scientific approach to digital growth.

KlientBoost

KlientBoost has revolutionized the "proof of work" concept with a visually stunning and data-heavy portfolio that focuses on PPC, SEO, and CRO. They are famous for their "marketing blueprints," which they share publicly to show the exact steps they take to increase a client’s profitability. Their case studies are filled with "after" screenshots of ad dashboards and heatmaps, leaving no doubt about the results they achieve. This agency is a favorite for SaaS and e-commerce brands that want a partner with a playful brand but a deadly serious commitment to data.

Single Grain

Single Grain, led by Eric Siu, specializes in SaaS and B2B growth marketing with a heavy emphasis on "high-leverage" strategies like content and SEO. Their public case studies highlight their work with giants like Amazon and Uber, showcasing their ability to scale massive traffic numbers. They are known for their transparency regarding the "Content Sprout" method, showing how they turn a single piece of content into a multi-channel traffic machine. Single Grain is the ideal partner for tech companies that want to move away from "hacky" marketing and toward sustainable, long-term growth.

Victorious

Victorious is a San Francisco-based SEO agency that wins by being hyper-focused on search engine optimization and nothing else. Their public proof of work is a masterclass in technical SEO, showing how they have moved the needle for brands in highly competitive spaces like legal and fintech. They publish exhaustive data on keyword movements and backlink profile improvements, proving their "search-first" methodology works. They are the best choice for businesses that want an agency that does one thing exceptionally well rather than being a "jack of all trades."

VaynerMedia

Founded by Gary Vaynerchuk, VaynerMedia is a global creative and social media powerhouse that focuses on "underpriced attention." Their public proof of work is visible across every major social platform, featuring high-gloss, viral campaigns for Pepsi, Budweiser, and GE. They excel at cultural storytelling, showing how they use real-time data to create content that resonates with modern consumers. VaynerMedia is for brands that want to be at the center of the cultural conversation and have the budget to execute world-class creative.

Ogilvy

Ogilvy is one of the most storied names in advertising, and their digital division continues this legacy with a portfolio of award-winning global campaigns. Their public proof of work covers everything from brand transformation to high-tech digital experiences for the world’s largest corporations. They detail their strategic "Ogilvy Way" in their public materials, showing how they blend traditional brand building with modern digital technology. This is the agency for global entities that need a partner with unmatched prestige and a worldwide infrastructure.

Tinuiti

Tinuiti is a leader in the "triopoly" of marketingGoogle, Facebook, and Amazonwith a public record of dominating the marketplace and social advertising. Their case studies often highlight their ability to manage complex e-commerce ecosystems, showing how they synchronize spend across multiple platforms for maximum ROI. They provide deep-dive reports on how they’ve helped retail brands navigate the shift to privacy-first advertising and cookie-less tracking. Tinuiti is the top choice for large-scale retailers and e-commerce brands looking to own every corner of the digital shelf.

Social Panga

Social Panga is a creative-led agency that has made a name for itself with quirky, high-engagement social media campaigns for brands like Swiggy and BigBasket. Their public portfolio is a vibrant display of scroll-stopping visuals and clever copywriting that drives actual business results, not just "likes." They show a clear link between their creative "vibe" and measurable metrics like app downloads and order volume. They are the perfect fit for B2C brands that want to inject personality and humor into their digital presence.

WATConsult

Part of the Dentsu group, WATConsult is an award-winning agency that provides a 360-degree digital approach, from influencer marketing to high-end tech builds. Their public case studies detail large-scale campaigns for companies like Tata and Apollo Hospitals, proving their ability to handle enterprise-level complexity. They are particularly strong in using data to drive creative decisions, showing how they use social listening to inform their big-budget campaigns. WATConsult is for brands that need a heavy-hitting partner capable of integrating technology and creativity at scale.

Schbang

Schbang describes itself as a "holistic digital solutions" agency, and its public proof of work reflects this by showcasing everything from film production to sophisticated web development. They have a massive presence in the global market, with case studies featuring high-end lifestyle and FMCG brands. Their work is characterized by a "global" aesthetic, showing how they help local brands scale to international audiences through premium storytelling. Schbang is ideal for companies that want a one-stop shop for high-quality content and technical execution.

FoxyMoron

FoxyMoron is an independent agency known for its "content-first" strategy, helping brands like Netflix and Burger King stay relevant in a fast-moving social environment. Their public case studies highlight their ability to build online communities and manage digital reputations with speed and wit. They are transparent about their creative process, showing how they turn trending topics into immediate brand wins. This agency is the best choice for entertainment and lifestyle brands that need to be fast, agile, and culturally savvy.

Dentsu Creative

Dentsu Creative is a global network that merges high-concept brand building with deep digital expertise, as seen in their public portfolio of international award winners. They detail their "Modern Creative" approach, showing how they use technology to create immersive experiences that go far beyond standard banner ads. Their work often includes VR, AR, and interactive digital installations for global luxury and tech brands. Dentsu Creative is for organizations that want to push the boundaries of what digital marketing can actually be.

Accenture Song

Accenture Song (formerly Accenture Interactive) is a massive digital transformation and marketing group that focuses on the "entire customer experience." Their public proof of work often centers on large-scale digital overhauls for Fortune 500 companies, showing how they merge marketing with product design and technology. They provide detailed whitepapers and case studies on how they use data to personalize every touchpoint of a customer’s journey. This is the partner for enterprises undergoing a total digital metamorphosis.

Publicis Sapient

Publicis Sapient is a digital business transformation firm that specializes in helping legacy brands adapt to the modern era through data and technology. Their public portfolio highlights complex engineering and marketing projects for global banks, retailers, and energy companies. They are transparent about their "LEAD" methodology, which helps brands stay ahead of disruption through continuous innovation. This agency is for massive organizations that need deep technical support alongside their marketing strategy.

Merkle

Merkle is a data-driven, technology-enabled performance marketing agency that specializes in "identity-based" marketing. Their public case studies show how they use deep consumer insights and CRM data to create hyper-personalized campaigns for brands like Samsung and Dell. They provide proof of how their data strategies lead to significant increases in customer lifetime value (LTV) and brand loyalty. Merkle is the ideal choice for companies with massive customer databases that need to be turned into revenue-generating assets.

Intero Digital

Intero Digital is a full-funnel agency that has built its reputation on "The Intero Method," a public-facing strategy that covers every stage of the buyer's journey. Their case studies highlight their success in combining SEO, PR, and social media to create a "surround sound" effect for their clients. They are particularly transparent about their lead nurturing processes, showing how they move prospects from "awareness" to "closed won." Intero Digital is a great fit for mid-market businesses that need a cohesive, all-in-one marketing engine.

Moburst

Moburst is a mobile-first agency that has become the world leader in App Store Optimization (ASO) and mobile growth. Their public proof of work is impressive, featuring massive success stories for brands like Uber, Discovery, and Pfizer. They provide detailed data on how they’ve achieved 500% increases in organic app downloads through clever creative and technical ASO tweaks. Moburst is the only choice for businesses whose primary product is a mobile application and who need to dominate the App Store.

Directive Consulting

Directive Consulting is a highly specialized agency that focuses exclusively on B2B and SaaS search marketing. Their public case studies are filled with "Revenue Operations" data, showing exactly how they increase SQLs (Sales Qualified Leads) and pipeline value for tech companies. they are known for their "Customer Generation" philosophy, which they share openly through blogs and webinars. Directive is the best partner for venture-backed SaaS companies that need to hit aggressive growth targets to satisfy investors.

OuterBox

OuterBox is an e-commerce powerhouse that specializes in ranking online stores at the top of Google for high-intent keywords. Their public portfolio showcases work for both B2B and B2C retailers, with documented increases in online sales ranging from 200% to over 1,000%. They are transparent about their custom e-commerce SEO strategies, showing how they handle large product catalogs and complex site architectures. OuterBox is the go-to for e-commerce brands on Shopify, Magento, or BigCommerce that want to dominate organic search.

SmartSites

SmartSites is a fast-growing agency known for its high-volume success with small-to-mid-sized businesses across America. Their public proof of work includes over 500 five-star reviews and hundreds of case studies detailing how they’ve helped local service providers and retailers scale. They are experts at PPC and web design, showing clear "before and after" examples of site overhauls that led to immediate lead increases. SmartSites is ideal for business owners who want a proven, affordable partner that delivers consistent results.

Webchutney

Webchutney is a creative giant in the Indian market, known for its award-winning digital campaigns that lean heavily into technology and innovation. Their public portfolio features work for brands like Google and IKEA, showing their ability to create interactive "digital experiences" that go viral. They are transparent about their experimental nature, often detailing how they used new tech like AI or AR to solve a brand’s challenge. Webchutney is for brands that want to be seen as innovators and tech-forward leaders.

Mirum India

Mirum India is a digital transformation specialist that focuses on marketing automation, CRM, and long-term brand building. Their public case studies often highlight their work with Salesforce and other major platforms to streamline the customer journey for enterprise clients. They provide proof of how their "connected" approach leads to better data management and higher conversion rates over time. Mirum is the best partner for companies that need to professionalize their marketing technology stack and automation.

Growth Hackers Digital

Growth Hackers Digital is a performance-focused agency that specializes in rapid experimentation and scalable lead generation for startups. Their public proof of work highlights their success with high-growth companies like Decathlon and Universal Sompo, showing how they use data to find "growth levers." They are open about their "sprint" based approach, detailing how they test dozens of ad creatives and landing pages to find winners. This agency is for fast-moving startups that need an agile partner to help them scale quickly.

iProspect India

iProspect India is the performance marketing arm of Dentsu, known for its data-driven approach to search, social, and programmatic advertising. Their public case studies show a deep focus on ROI, featuring work for major financial institutions and global retail brands. They provide proof of how their "omnichannel" strategies ensure that every marketing dollar is optimized for the highest possible return. iProspect is for established brands that need a sophisticated, high-scale performance marketing engine.

Langoor

Langoor is a digital-experience-led agency that merges branding, performance, and technology into a single growth strategy. Their public portfolio features work for enterprise clients like Accenture and Adobe, showing their comfort with high-level corporate expectations. They are transparent about their "design-first" philosophy, showing how a better user experience leads directly to better marketing performance. Langoor is a great choice for B2B and tech companies that need a partner with deep technical and design chops.

ROI Minds

ROI Minds is a Mohali-based agency that has earned a global reputation as a specialist in e-commerce performance marketing. Their public proof of work is filled with screenshots of Facebook and Google ad accounts showing 5x to 10x ROAS for jewelry, fashion, and health brands. They are incredibly transparent about their "funnel building" process, showing how they turn cold traffic into repeat buyers. ROI Minds is a top-tier choice for D2C brands that want a specialized partner to handle their paid advertising.

Digidarts

Digidarts is a performance marketing agency that focuses on helping brands scale from their first few sales to millions in revenue. Their public case studies highlight their "data-first" approach, showing how they use deep analytics to optimize every stage of the sales funnel. They have a strong track record with e-commerce and app-based businesses, providing clear proof of their ability to drive low-cost acquisitions. Digidarts is the partner for brands that want an agency with a "skin in the game" mentality.

Social Beat

Social Beat is a growth-driven agency that specializes in video, influencer marketing, and multi-lingual digital strategies. Their public portfolio showcases how they help brands reach "the next billion users" through vernacular content and hyper-local targeting. They provide proof of how their influencer campaigns drive massive engagement and sales for FMCG and education brands. Social Beat is the go-to for companies looking to expand their reach across diverse demographics and regions.

WeBeeSocial

WeBeeSocial is a boutique agency known for its bold, "edgy" creative work and its strong focus on social media engagement. Their public case studies show a flair for storytelling, featuring work for international NGOs, government bodies, and lifestyle brands. They are transparent about their creative process, showing how they use design to build "brand love" and long-term community loyalty. This agency is a great fit for brands that want to stand out with a unique, high-energy visual identity.

DigiChefs

DigiChefs is a Mumbai-based agency that combines a "scientific" approach to marketing with a deep love for high-quality content. Their public proof of work shows a range of successes in real estate, healthcare, and finance, focusing on high-intent lead generation. They provide detailed reports on how their "content-to-conversion" strategies help brands build authority while driving immediate inquiries. DigiChefs is the ideal partner for service-based businesses that need a steady stream of qualified leads.

BrandLoom

BrandLoom is a consulting and digital marketing agency that focuses on "D2C branding meets growth marketing." Their public case studies highlight their ability to build brands from scratch and then scale them through e-commerce and performance ads. They are open about their "brand-first" philosophy, showing how a strong identity makes performance marketing much more effective. BrandLoom is for entrepreneurs and established companies that need a partner to handle both the "soul" and the "sales" of their brand.

echoVME Digital

Founded by influencer Sorav Jain, echoVME is a leader in digital marketing training and agency services with a strong focus on personal branding and social media. Their public proof of work features diverse successes for South Indian brands, ranging from retail to professional services. They are experts in using social media for "community building," showing proof of how they turn brand pages into active hubs of customer activity. This agency is for brands that want to leverage the power of social influence and the local community.

iDigitalise

iDigitalise is a global agency with a strong presence in the UK and India, specializing in digital transformation and performance marketing for startups and SMEs. Their public portfolio features work for over 1,000 clients, showing a vast range of experience in web development and SEO. They are transparent about their "agile" delivery model, showing how they help companies modernize their digital presence quickly and cost-effectively. iDigitalise is a solid choice for companies looking for a reliable, multi-national partner with SME-friendly pricing.

WPWeb Infotech

WPWeb Infotech is a leading web and mobile app development company that has transitioned into a full-service digital marketing powerhouse. Their public proof of work is centered on technical excellence, showing how they build high-performing websites and then drive traffic to them through SEO and PPC. They are experts in the WordPress and Shopify ecosystems, providing detailed case studies on site migrations and speed optimizations. This agency is for businesses that want their marketing partner to also be their technical support team.

Fair Marketing

Based in Houston, Fair Marketing is a results-oriented agency that focus on "transparency and integrity" in a sometimes-murky industry. Their public case studies highlight their work in the energy, legal, and healthcare sectors, with documented results in local and national SEO. They are open about their "Rank, Click, Convert" methodology, showing how they move leads through the entire funnel. Fair Marketing is the best choice for Texas-based businesses that value a local partner with a clear, honest reporting style.

Brandconn Digital

Brandconn Digital is an ISO-certified agency that specializes in "digital transformation" for companies in the US, UK, and Australia. Their public portfolio showcases their work in white-label SEO and custom web development, proving their ability to act as a seamless extension of a client’s team. They provide proof of how their "cost-effective" offshore teams deliver high-quality results for western brands. Brandconn is the ideal partner for agencies or companies looking to outsource high-volume digital work without sacrificing quality.

Conversion Perk

Conversion Perk is a boutique agency that focuses heavily on PPC management and social media advertising for the global market. Their public proof of work is filled with data-heavy reports showing how they’ve lowered CPL (Cost Per Lead) and increased ROAS for diverse clients. They are transparent about their "account audit" process, showing the common mistakes they find in most ad accounts and how they fix them. This agency is a great fit for brands that need a highly responsive, specialist team to manage their ad budgets.

SEO Discovery

SEO Discovery is one of the largest digital marketing agencies in India, with a team of over 400 professionals and a massive public history of SEO success. Their case studies highlight their ability to handle "unlimited" keyword projects and massive site architectures for global retailers. They provide proof of their ability to rank brands on the first page of Google for some of the most competitive keywords in the world. SEO Discovery is for businesses that need a high-volume, "search-first" agency with a massive bench of talent.

ThatWare LLP

ThatWare is a specialized SEO agency that focuses on "AI-driven search strategies" and semantic SEO to stay ahead of algorithm updates. Their public proof of work includes complex technical case studies showing how they use machine learning to improve a brand's search visibility. They are transparent about their "advanced SEO" tactics, showing how they optimize for entities and AI-generated search results. This agency is for tech-savvy brands that want to be on the cutting edge of search technology.

Digital Silk

Digital Silk is a global agency that lives by the motto "Grow Your Brand Online," focusing on high-end web design and performance marketing. Their public portfolio features sleek, premium work for major brands and high-growth startups alike. They are unique in offering a "performance guarantee" for their digital marketing services, which they back up with dozens of high-end case studies. Digital Silk is for brands that want a premium, high-impact aesthetic combined with a results-oriented mindset.

Smart-I Strategy

Smart-I Strategy is a consulting-led digital agency that focuses on "strategic market entry" and growth for brands in the Asian market. Their public proof of work highlights their success in helping international brands navigate the complex cultural and digital landscapes of Japan, Korea, and China. They provide detailed reports on how they use localized content and platform-specific marketing (like LINE or WeChat) to drive success. This is the partner for brands looking to expand into East Asia with a verified, local expert.

NinjaPromo

NinjaPromo is a full-service B2B and fintech marketing agency that specializes in "disruptive" digital strategies for the crypto and SaaS industries. Their public portfolio is filled with high-energy, visual-heavy campaigns that have helped startups raise millions in funding or reach millions of users. they are experts in community management on platforms like Telegram and Discord, providing proof of how they build "hype" that translates into users. NinjaPromo is the only choice for web3, crypto, and fast-moving fintech brands.

Siege Media

Siege Media is arguably the best "content marketing" agency in the world, with a public proof of work that focuses on creating high-end, linkable assets. Their case studies show how they have helped brands like Zillow and TripAdvisor earn thousands of high-authority backlinks through sheer creative quality. They are transparent about their "ROI-driven content" philosophy, showing the exact traffic value their work generates over time. Siege Media is the partner for brands that want to build long-term organic authority through world-class editorial work.

Go Fish Digital

Go Fish Digital is a technical SEO and "online reputation management" (ORM) powerhouse with a record of protecting and growing major brands. Their public proof of work highlights their ability to fix negative search results and help brands recover from algorithm penalties. They are also leaders in "creative SEO," showing how they use data journalism to earn major media placements. This agency is for companies that need a high-level partner to manage their brand’s digital health and organic visibility.

Fractl

Fractl is a research-led digital agency that specializes in "growth through data-driven storytelling" and viral PR campaigns. Their public portfolio features dozens of campaigns that have been featured in major news outlets like the NYT and CNN, driving massive brand awareness and backlinks. They provide detailed breakdowns of how they use original research and surveys to create "newsworthy" content that journalists love. Fractl is the ideal partner for brands that want to earn high-authority media coverage and build massive brand awareness.

Showcase Your Public Proof of Work with Fueler

In an industry where every agency claims to be "the best," the only thing that actually matters is what you can prove. These 50 agencies have built their success on the foundation of transparency and verified results. If you are a professional or an agency looking to join their ranks, Fueler is the platform you need. Fueler allows you to create a high-impact, professional "proof of work" portfolio that goes beyond a standard CV. You can showcase specific assignments, live campaigns, and technical projects in a way that is easily auditable by potential clients. By using Fueler to document your skills and results, you build the same kind of trust and credibility that the world’s top agencies use to win high-value business every single day.

Final Thoughts

The era of "guessing" in marketing is over. As we navigate 2026, the agencies that win are those that are brave enough to share their data and their process publicly. Whether you are looking for a global partner like Ogilvy or a niche performance shop like ROI Minds, the key to your success is choosing an agency with a verified history of performance in your specific industry. Use this list as a starting point, audit their public case studies, and find the partner that doesn't just promise growthbut has a record of delivering it.

FAQs

1. What does "public proof of work" actually mean?

Public proof of work refers to an agency's willingness to share real-world data, case studies, and project breakdowns on their website or third-party platforms. This includes specific metrics like "increase in revenue," "cost per acquisition," or "keyword ranking movements," allowing potential clients to verify the agency's claims before hiring them.

2. Is it better to hire a niche agency or a full-service firm?

It depends on your internal team's capabilities. If you have a strong marketing director but need a specific expert for SEO, a niche agency like Victorious or Siege Media is best. If you need a partner to handle your entire digital presence from end-to-end, a full-service firm like Thrive or NP Digital ensures that all your channels are working together under one strategy.

3. How often do these agencies update their portfolios?

Most top-tier agencies update their case studies quarterly to reflect the latest algorithm changes and market trends. In 2026, it is especially important to look for case studies that involve AI-driven search (GSO) and privacy-first tracking, as these are the most relevant challenges facing modern businesses.

4. Can small businesses afford the agencies on this list?

Many of the boutique and mid-market agencies (like SmartSites, ROI Minds, or Red Canoe Media) have pricing models specifically designed for small-to-mid-sized businesses. However, global giants like Ogilvy or VaynerMedia typically work with enterprise-level budgets. Always check the "minimum project size" on platforms like Clutch or DesignRush before reaching out.

5. How do I know if an agency's case study is real?

Check for third-party verification. Look for the same client mentioned in the case study on platforms like Clutch, G2, or LinkedIn. You can also look at the client's actual website or social media to see if the work described (like a new web design or a specific ad campaign) is actually live and matches the agency's description.

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