The "best" digital marketing agency in New York can vary depending on your specific needs and criteria. To find the best agency for your business, consider factors such as your budget, industry, goals, and the services you require.

Here are a few well-known digital marketing agencies in New York City that were reputable as of my last update in 2021. Keep in mind that the industry is dynamic, and rankings can change:

1. VMLY&R: A global marketing agency with a strong presence in New York, offering a range of digital marketing services.

2. 360i: Known for its expertise in digital advertising, data analytics, and performance marketing.

3. R/GA: An agency that focuses on innovation and technology-driven marketing solutions.

4. Huge: Offers a wide range of digital marketing services, including web design and development, UX/UI design, and digital strategy.

5. Ogilvy: A well-established advertising and marketing agency with a global presence, including New York.

6. Merkle: Known for its data-driven approach to digital marketing and customer relationship management.

7. DigitalOcean: A digital marketing agency that specializes in SEO, content marketing, and PPC advertising.

8. The Charles: Offers a mix of creative and digital marketing services, including branding, web design, and social media marketing.

To determine the best agency for your specific needs, it's essential to do your own research, request proposals from several agencies, and assess their capabilities, portfolio, client reviews, and pricing. Additionally, consider reaching out to industry peers or conducting online searches for recent reviews and rankings of digital marketing agencies in New York City to get the most up-to-date information.