Independent list · re-checked September 28, 2026 · published by Primortul LLC

Socialfly

Socialfly is a woman-founded, social-first agency in Manhattan started in 2011 by Stephanie Cartin and Courtney Spritzer. It manages social channels, influencer campaigns, paid media and creative for consumer and entertainment brands including Madison Square Garden, Summit One Vanderbilt and Conair. Nobody pays to be ranked.

Why it’s hereTwice on the Inc. 5000, an Adweek fastest-growing agency and a Shorty Award honoree. Ownership: independent. Number 5 of the social media companies in the US.

Work they can showSUMMIT One Vanderbilt. Ran paid social and connected TV campaigns that grew revenue while cost per acquisition came in 40% below goal.

Estimated cost

Estimated: $4,000–$12,000/mo, typical for US social media retainers; not a quote.

Typical industry estimate, not a quote from any firm on this list.

A fit forConsumer, entertainment and hospitality brands, such as Warner Bros. Discovery, Barilla and SUMMIT One Vanderbilt, that want social media, influencer and paid social campaigns from a female-founded New York agency.

Based in
New York, NY
Founded
2011
Team size
11–50 people
Known for
social media management · influencer marketing · paid media · creative production · women-founded
Named clients
Madison Square Garden, Summit One Vanderbilt, Conair, SlimFast, DevaCurl, Weleda, Alex and Ani, Max
Best for
Consumer, entertainment and hospitality brands, such as Warner Bros. Discovery, Barilla and SUMMIT One Vanderbilt, that want social media, influencer and paid social campaigns from a female-founded New York agency.
Selected work
  • SUMMIT One Vanderbilt. Ran paid social and connected TV campaigns that grew revenue while cost per acquisition came in 40% below goal. source ↗
Estimated cost

Estimated: $4,000–$12,000/mo, typical for US social media retainers; not a quote.

Typical industry estimate, not a quote from any firm on this list.

Office
231 West 29th St, Suite 702 · New York, NY · 10001 · 917.300.8298
Socialfly homepage, captured September 28, 2026
socialflyny.com · homepage on September 28, 2026

Sources socialflyny.com, clutch.co · LinkedIn ↗

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