MATTIO Communications: New York Cannabis PR Agency Profile

MATTIO Communications is a New York cannabis PR agency founded in 2004 by Rosie Mattio, with offices in New York, Los Angeles and Toronto. It handles media relations, SEO, content, influencer marketing and investor relations for cannabis operators and ancillary brands, and it runs a consumer sister agency, White Oak Communications. According to the agency's 2019 funding announcement, Green Market Report ranked it the number one cannabis PR firm.

Originally published October 2020. Updated October 22, 2026.

How did MATTIO move into cannabis?

Rosie Mattio moved to Seattle in 2014, just as Washington launched adult-use cannabis sales, and was asked to run a crowdfunding campaign for a cannabis cookbook, as she told Marijuana Venture. Her specialty food PR background fit the brief, and mainstream reporters were eager to cover the topic. That led her to build a consumer-style cannabis practice, and she told the magazine her firm was the first to place cannabis stories in mainstream titles such as Vogue and O, The Oprah Magazine.

How has MATTIO grown?

O'Dwyer's reported in April 2019 that MATTIO closed a seed round with investors including Phyto Partners, Green Seed Fund and Greycroft founder Alan Patricof, and served more than 25 cannabis clients. The company said the funds would expand digital services, including a programmatic ad network for cannabis clients.

Mattio told Muse that her team handled communications for more than 40 clients during Covid, including investor communications and crisis counsel. MediaPost reported that the agency later launched White Oak Communications, a sister agency for food, beverage and consumer brands led by Drew Tybus.

Which clients and recognition does MATTIO have?

MATTIO's clients have included Headset, Canndescent, Papa & Barkley, LeafLink, Flowhub, Caliva and Ascend Wellness Holdings, according to the 2019 funding announcement. A 2021 MG Retailer profile added TerrAscend, Curaleaf and Greenlane Holdings. Rosie Mattio was named to Marijuana Venture's 40 Under 40.

How does MATTIO compare with other cannabis PR firms?

MATTIO is a full-service agency with broader digital and investor services than most cannabis PR boutiques. It is ranked in Top Cannabis PR Firms 2026. For another cannabis-focused New York agency, see the NisonCo profile.

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Related: Top Cannabis PR Firms 2026 · PR agency profiles directory · NisonCo · Reputation management