Instagram Advertising Agencies in San Jose

Ninja Promo is a full-service digital marketing company built around subscription-based dedicated marketing teams. Instead of traditional agencies that bill per project or freelancers with limited bandwidth, you get a stable cross-functional team on a flexible monthly subscription.

CMO-on-demand, strategists, project managers, designers, content creators, media buyers, and analysts work as one unit, giving you predictable costs, faster execution, and the impact of an in-house team without the hiring overhead.

We deliver full-cycle digital marketing across all key channels and disciplines. From market research, positioning, and brand strategy to design, creative and content production (including video), performance marketing, SEO, paid advertising, content marketing, social media, influencer marketing, PR, web and landing page development, and analytics - we run your marketing operations end to end under one roof. Our integrated approach keeps strategy, creatives, and media aligned, so every campaign supports your growth targets, whether you need one core service or a complete marketing transformation.

We work with companies across multiple industries because we believe real marketing expertise is not about being locked into a single niche, but about the ability to research, understand, and win in any market. Our teams follow a research-driven playbook: deep industry and competitor analysis, understanding regulations and audience behavior, and rapid testing to find what truly converts. This approach has already delivered proven results in B2B and SaaS, crypto and Web3, fintech and financial services, IT and software, gaming and iGaming, e-commerce, real estate, healthcare, forex, AI and more, with new verticals constantly added to our portfolio. Cross-industry experience lets us transfer successful tactics from one sector to another, giving our clients an advantage that single-industry agencies simply cannot provide.

Our Expertise

Harrington Clark was born to help companies navigate the often confusing world of social media management and advertising.

We recognized a significant gap in understanding and a pervasive fear among businesses to trust agencies that promise but don’t deliver.

Social Media Management

Beyond advertising, our Social Media Management services encompass content creation, community management, and performance analysis. We handle everything from crafting compelling posts and managing interactions to monitoring analytics and optimizing your social media presence. Our goal is to build a strong, engaged community around your brand, fostering loyalty and growth.

Social Media Advertising

Our Social Media Advertising services are designed to maximize your reach and ROI. We manage monthly advertising budgets ranging from $1,000 to $300,000+, consistently generating healthy returns. By leveraging targeted campaigns and data-driven strategies, we ensure your ads resonate with the right audience, driving engagement and conversions.

Why Choose Harrington Clark?

Industry Experience: Proven track record with PR, Tech, Startups, Fortune 500 companies, and 20+ more industries.

Customized Strategies: Tailored approaches for accounts of all sizes, from 1,000 to 100,000+ followers.

Comprehensive Services: Integrated Social Media Advertising and Management for cohesive brand growth.

Data-Driven Results: Effective budget management and ROI-focused campaigns.

Partner with Harrington Clark to unlock the full potential of your social media channels. Let us manage your online presence while you focus on what you do best—running your business.

Write to us via email or WhatsApp so we can respond to your inquiries and provide you with more information!

⚠️ This is the only way we have to contact you ⚠️

Do you have a website or online store and want to attract more people to generate inquiries or sales? Would you be interested in having a better online presence on your social media? Do you need to delegate the design and writing of posts?

We help your company increase its sales through Digital Marketing.

Who are we?

We are a digital marketing agency with vast experience in Google, Social Media, and Email Marketing.

Why should you choose us?

• We are Google Partners: This means that Google recognizes us as an expert agency with experience in its advertising platform.
• Experience: We have been working in Digital Marketing for over 10 years. We have managed over 30 million dollars in digital media, in Argentina, Colombia, Brazil, India, Mexico, Costa Rica, etc.
• Leads and Sales: We specialize in Performance Campaigns, meaning that when we activate campaigns, we focus on generating leads and sales (contacts, phone calls, store visits, online store sales, etc.).
• Service Vocation: We build relationships with our clients and advise them on matters that go beyond Google, Social Media, or Email Marketing, because we are interested in the well-being and progress of each company.
• We adapt quickly: We have clients from various sectors and in different countries (Central America, Argentina, India, Mexico). We study each company, its services, and its environment.

Jeanette Gianfreda, founder at Digital Agency JG:

“I created Digital Agency with the goal of helping small and medium-sized businesses promote their business online and thus achieve increased sales month by month”

“I specialized in the development and implementation of Digital Marketing strategies for companies, particularly in Google Ads for over 15 years.”

Hi 👋🏼 We're Good Kids.


We're an an independent agency based in Los Angeles, NYC & Toronto.

We create evocative campaigns that connect with audiences.

Our powerful marketing strategy & outstanding advertising take our clients further than ever. Want to see where we can take you?


✨ We help small brands become big and big brands become giant.🏆

Our award-winning strategy is on engagement, awareness & authenticity, underlining what's important. We create evocative campaigns that connects with audiences In meaningful ways. We humanize, amplify & relate. This converts, moves the dial and makes it shareable. In Short: We Build Your Reputation & get you results.

We’re very good at:

🧠 Marketing Strategy

💥 Creative Production

📱 Social Media Management

💻 Digital Marketing

🤝 Pr & Partnerships

🎪 Pop Up Events

💰 Paid Advertising & SEO

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In a world where you can be anything; don’t be boring.


We'll give 'em something to talk about!

Galactic Fed is a growth marketing agency built from the data, AI, and growth hacking techniques that launched Silicon Valley’s most iconic brands. Our approach was pioneered by a team of mathematicians and software engineers, and since 2017, Galactic Fed has helped over 600 companies grow.

We build digital strategies to supercharge your user acquisition and revenue, including paid media, SEO, content, website creation, email and LinkedIn prospecting, organic social, and more.

Made up of one of the industries' most talented PPC teams to manage our clients' digital marketing activity.

Whether you’re building a brand, generating leads or managing online advertising for eCommerce our service is fully customizable to fit any industry’s needs.

By combining our extensive industry knowledge and experience with our advanced proprietary technology, we offer a unique digital marketing service.