Top Omnichannel Marketing Agencies in New York, New York

WITHIN

Verified

WITHIN is the leading Performance Branding company.

At WITHIN, we pride ourselves on our unique approach to digital marketing, what we call 'Performance Branding'. This methodology merges the strengths of brand marketing with the result-driven nature of performance marketing, enabling us to create and execute strategies that not only elevate brand presence but also ensure profitable growth for our partners. At the core of Performance Branding is our commitment to aligning marketing goals with actual business objectives. We believe that the secret to achieving this alignment lies in breaking down the silos that traditionally exist within marketing organizations. With our model, media buying communicates with creative teams, performance teams work closely with brand teams, and all marketing channels are viewed through a unified lens.

HelpGood

HelpGood helps purpose-driven organizations reach, engage and activate communities through strategy, creative work and integrated campaigns.

HelpGood is a full-service marketing and communications agency built for organizations working to make a social impact. We partner with nonprofits, foundations, public agencies and universities to help them reach, engage and activate the people who matter to their missions. Our services include research and strategy, brand positioning and messaging, creative campaigns, content, video, social media, websites, email, influencer engagement, public relations, paid media and analytics. We can shape the strategy, build the campaign and help run it across channels, giving clients one accountable team from planning through implementation and learning. Our team brings deep experience in public health, climate and clean energy, education, equity, fundraising and other complex issues. We turn complicated ideas into clear, compelling communications people can understand and act on. Audience insights, behavioral science and real-world performance data guide the work, with accessibility and cultural relevance built into the process. We understand the realities of mission-driven organizations: multiple stakeholders, limited resources, public accountability and the need to show meaningful results. Clients work directly with senior people who are practical, collaborative and comfortable moving between strategy and hands-on execution. HelpGood has supported organizations including American Jewish World Service, Acacia Center for Justice, the U.S. Forest Service, the Bureau of Land Management, the California Department of Public Health, Los Angeles County, New York University and Columbia University. Our assignments have included statewide public education and behavior-change campaigns, brand and messaging strategy, donor engagement, social media programs, websites, public relations, reports and award-winning creative. HelpGood is a certified B Corp and LGBTQ-owned agency with teams in Los Angeles and New York. We were named to the Inc. 5000 and ranked the #1 social impact agency on Adweek’s Fastest Growing Agencies list.

SLT Consulting

Digital Marketing Solutions, Tailored to Your Vision.

SLTC is a digital marketing agency for fashion, beauty, wellness, and lifestyle brands that already have something good going and want to grow it further. We're not here to hand you a generic playbook or a cookie-cutter strategy. Before we recommend anything, we take the time to actually understand your business: your customers, what's worked so far, and where the real opportunity is. From there, we build a plan that fits your brand and bring together a team who works alongside you every step of the way, not a rotating cast of strangers. Whether you're looking to grow through better creative, smarter marketing, or a stronger digital presence, we're focused on outcomes you can see and feel, not just activity.

Flowium

Email, SMS & Retention Marketing for DTC Brands

We help eCommerce brands grow with retention-driven lifecycle marketing, built on email and strengthened by the right channels at key moments. Trusted by 1,000+ brands · Klaviyo Elite Partner Services We Offer: Email Marketing - We use our proven strategies with a track record of success to deliver result-driven email marketing to level-up your business quickly and effectively. SMS Marketing – Fast, direct text messages that drive engagement and conversions RCS Marketing – Rich-media branded messaging with product imagery and dynamic CTAs WhatsApp Marketing – Secure, real-time conversations for global audiences Instagram DM Automation – Automated DMs and campaigns that convert followers into subscribers Push Notifications – Timely desktop & mobile alerts during key shopping moments Direct Mail – High-impact physical mailers for memorable, branded experiences Landing Page & Form Redesign – Conversion-focused updates to improve performance Contests & Giveaways – Full setup, strategy, design, and automation for list growth These channels support one goal: stronger retention and higher LTV. What’s included in our core Email Marketing service: A dedicated team of 6 specialists assigned to your brand ESP setup, audit, and ongoing account management Custom email design and copywriting Email automation strategy, buildout & optimization Campaign calendar planning and implementation A/B and split testing Advanced segmentation Deliverability monitoring Monthly reporting Weekly calls with your specialist and team Every Flowium team member is an expert in their field — strategy, copy, design, and technical implementation — working together to bring you reliable execution and top-tier results. Interested in working with us? Reach out to see how our team can help you drive measurable growth across your lifecycle channels. Proud 2025. Inc. 5000 Honoree | Klaviyo Elite Partner | #1 Email Marketing Agency [Maverick]