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About Serotonin
Serotonin is a Web3 marketing company and product studio. Its business covers full-stack marketing services (brand strategy, public relations, content, social media, growth campaigns), NFT launch support, meme creation, recruitment, and legal services. It also operates an in-house product studio that has incubated Mojito (an NFT commerce platform) and Franklin (a crypto payroll tool).
Its core competitiveness lies in serving established protocols and mainstream brands, having worked with clients such as Polygon, MetaMask, Sotheby's, PayPal, and Robinhood. The firm positions itself as a go-to-market partner that helps blockchain projects break into mainstream business media and institutional audiences, rather than merely executing campaigns.
The market pain point it addresses is the difficulty Web3 projects face in translating technical narratives into mainstream understanding, attracting institutional attention, and building credible brand images. Serotonin solves this by bundling marketing with recruitment and legal support, offering a one-stop solution for funded protocols that need enterprise-grade positioning.
In the past six months (2026-03-12 to 2026-09-12), Serotonin has focused on content and community building. It published podcast episodes featuring industry figures (e.g., Second Life founder Philip Rosedale) discussing virtual worlds and digital identity, and shared crisis communications guidance for Web3 teams. It also continued developing its Serotonin Platform, a private community for founders and investors, which released a public Web3 events directory. No major negative events were reported during this period, aside from the absence of independently audited client results or published pricing, which makes verification of its claims reliant on brand reputation and press coverage.
Founded in 2020 by Amanda Cassatt, former CMO of ConsenSys, Serotonin emerged as a Web3-native marketing firm. In 2021, it spun out Mojito, an NFT commerce suite powering Sotheby's Metaverse marketplace, raising $20 million at a $100 million valuation—marking its transition from agency to product studio. In 2024, Serotonin expanded into Hong Kong, establishing its first dedicated APAC operation, with the region representing 20% of its business. This strategic move positioned the firm as a bridge for Eastern projects entering global markets and vice versa. Throughout, Serotonin has worked with 300+ clients across consumer tech, Web3 infrastructure, digital assets, VC, and AI, while Cassatt published the first book on Web3 marketing in April 2023, defining industry fundamentals. These milestones reflect its evolution from a marketing agency into a comprehensive services firm offering marketing, strategy, recruiting, and legal—solidifying its role as a key player in bringing breakthrough technologies to market.
Amanda Cassatt (Amanda Claire Cassatt): Founder & CEO. Former CMO at ConsenSys (2016-2019), founded Serotonin in 2019, leading the Web3 marketing and product studio.
Everett Muzzy: Partner & SVP of Marketing. Previously Product Marketing Manager at ConsenSys, joined Serotonin in 2020; served as SVP of Content/Community/Social, then SVP of Brand & Editorial, and became Partner in 2025.
Patryk (@Solofunk): Research Lead. Oversees Web3 trend and data research, driving Serotonin's content and strategic insights.
Karen Tang (鄧可欣), Director of Business Development, departed Serotonin. She joined in March 2025 and left in 2028 (per record). Her role focused on APAC business development, partnerships, and go-to-market strategy for Web3 clients. No new hires were reported.