Fundraising Fox

Sound.xyz

Defunct

Founded 2021 · 8 employees on LinkedIn · 23 known investors

Sound was a music platform for artists and collectors to mint and collect music onchain; the platform is now offline as of January 2026, with all collected music and metadata preserved on decentralized storage.

Also known as Sound · Sound.xyz

Founders & leadership

Sound.xyz was founded in 2021 by David Greenstein.

DGDavid Greenstein
David Greensteinin𝕏Founder

Investors · 23

Also in the syndicate · 10

A.Capitala16z crypto (Andreessen Horowitz)leadCoinbaseCollab + CurrencyCoop RecordsPalm Tree CrewPaul RosenbergRyan TedderSnoop DoggTay Keith

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Company profile

researched Aug 2026

Sound.xyz (also referred to as Sound) was a New York City-based, web3-native music platform that let musicians release songs as NFTs that fans could stream for free and "collect" by purchasing. Artists set their own prices and terms, retained 100% of master and publishing rights, received payouts described by the company as instant, and could split revenue among collaborators. Each release was issued as a numbered NFT, with earlier supporters receiving lower numbers, a mechanic intended to reward early discovery and let collectors demonstrate onchain that they backed an artist before wider recognition. Music files were stored using IPFS, and NFTs could be minted on Ethereum mainnet and the Optimism layer-2 network.

Platform features described in secondary coverage included no listing fee, a 10% royalty cap on secondary sales, aggregation of music NFT listings from OpenSea, X2Y2 and LooksRare, bulk purchasing, timestamped "ownership comments" that a new owner could overwrite, a randomly placed "golden egg" that upgraded an NFT to a 1/1 edition with special artwork, listening before collecting, and a 5% curator reward paid to collectors whose playlists or referral links led to a mint. Fans could sign up with an email address and pay with a bank card. The company also described listener-level data for artists, custom supporter perks, a viral chart driven by user activity, and work on an artist-fan messaging system.

Sound.xyz operated in closed beta with an invited roster before opening to all artists in July 2023. The platform was taken offline on January 16, 2026; the team stated that maintaining legacy infrastructure divided its focus from a successor product, Vault (vault.fm). Collected items remain onchain, with music and metadata on decentralized storage and collections viewable through wallets on marketplaces such as OpenSea, and artists can continue claiming remaining funds from the contract via Splits.

Founding story

David Greenstein began his career in music and technology with an internship at Atlantic Records and was previously a product manager at the streaming service Pandora. He said he repeatedly encountered two recurring industry questions — how to help artists reach as many people as possible and how to help them make money from their music — and built Sound as an answer, aiming for the platform to become "the homepage of music discovery." Secondary coverage names David Greenstein, Vignesh Hirudayakanth and Matt Masurka as co-founders, dating the company's founding to 2021.

Business model

Sound operated a platform on which artists uploaded music and released it as NFTs at prices they set, with fans purchasing ("collecting") editions while streaming remained free. Artists retained 100% of master and publishing rights, received payouts routed onchain, and could configure collaborator splits. Sources state the platform launched with a 0% listing fee and applied a 10% royalty cap on secondary sales; a 5% curator reward was paid to collectors who drove mints via playlists or referral links.

Sources do not state how Sound.xyz generated revenue for itself; they describe a 0% listing fee for artists, a 10% cap on secondary-sale royalties, and a 5% curator commission paid to referring collectors, plus a stated per-transaction cost to collectors of 0.0007 ETH as of July 7, 2023.

Traction

Over roughly 12–18 months of closed beta preceding July 2023, about 500 invited artists uploaded approximately 1,600 songs, and the platform paid out or generated $5.5 million for those artists. The CEO said he expected a song on the platform to reach one million sales in the coming months. The platform later ceased operations in January 2026.

Latest developments

Sound.xyz went offline on January 16, 2026. The company said the decision reflected a need to focus fully on Vault (vault.fm), a new product built around artist independence, and invited artists who had released on Sound to join a Vault beta. Collectors' holdings remain onchain and artists can still claim outstanding funds from the contract through Splits using a published withdrawal guide.

Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

Sound.xyz was described in trade coverage as a leading dedicated music NFT marketplace, differentiated from general NFT marketplaces by its music-specific focus, and positioned as an alternative to streaming services such as Spotify and Apple Music. It also functioned as an aggregator of music NFT listings from OpenSea, X2Y2 and LooksRare.

Distinguishing elements cited by sources include artist-set pricing with 100% retention of master and publishing rights, numbered editions that record order of support, free streaming before collecting, timestamped ownership comments, the randomized "golden egg" that converts an NFT into a 1/1 edition, curator rewards for referrals, no listing fee, and aggregation of music NFT listings from other marketplaces.

Technology

Music NFTs were minted on Ethereum mainnet and on the Optimism layer-2 network, with audio files and metadata stored on IPFS, a peer-to-peer content-addressed distributed file system. Minting contracts were branded with the artist's name. Payment splits were handled onchain via Splits, and fans could onboard with email and pay by card. After shutdown, collected music and metadata remained on decentralized storage and holdings remained visible in wallets on third-party marketplaces.

Go-to-market

Sound initially operated invite-only, onboarding roughly 500 selected artists during a closed beta before opening to all artists in July 2023, at which point users could create an account, complete verification, upload songs and set prices. The CEO said the company had done "zero marketing" to date as of the Series A, and planned to use the funding for events and online marketing as well as engineering and design hiring. High-profile artist participation, including Snoop Dogg and Ryan Tedder, both of whom released music on the platform and invested, supported visibility.

Independent and emerging recording artists seeking direct monetization outside streaming economics, alongside established acts; and music fans/collectors who wanted to support artists early, own onchain editions and display or trade collections.

Geography

Headquartered in New York City, with an internet-based, globally accessible platform.

History

Sound was founded in 2021 and announced a $5 million seed round in December 2021. The platform launched in 2022 and operated in closed beta with an invite-only roster of artists. On July 12, 2023, the company announced a $20 million Series A led by a16z crypto and simultaneously opened the platform to all artists. On January 16, 2026, Sound.xyz went offline, with the team stating it was focusing on a successor product, Vault (vault.fm).

Risks & controversies

The shutdown of the platform in January 2026 leaves artists and collectors dependent on onchain records, decentralized storage and third-party marketplaces for access to purchased music and metadata, and requires artists to manually claim remaining funds via Splits. No other controversies are described in the sources.

Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Artists on platformJul 2023500 artists
Collector transaction feeJul 20230 ETH per transaction
Curator reward on referred mintsJan 20265%
Listing feeJan 20260%
Paid out to artists (cumulative, closed beta)Jul 2023$5.5M
Secondary sale royalty capJan 202610%
Songs releasedJul 20231,600 songs

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Competitors · 2

by search overlap

Companies competing with Sound.xyz for the same Google search keywords, organic and paid, via search-intersection analysis.

Timeline · 4

launches, deals, and filings
Jan 2026
Sound.xyz goes offline

The company took the Sound.xyz platform offline, stating that maintaining legacy infrastructure diverted focus from its new product Vault (vault.fm). Collected music and metadata remain on decentralized storage, holdings remain visible via connected wallets on marketplaces such as OpenSea, and artists can claim remaining funds from the contract via Splits.

source ↗

Jul 2023
Sound.xyz raises $20M Series A led by a16z crypto

Sound.xyz announced a $20 million Series A led by Andreessen Horowitz's a16z crypto fund, with participation from Palm Tree Crew, A.Capital, Sound Ventures, Collab + Currency, Scalar Capital, Coinbase, Coop Records, Crush Ventures and artist investors Snoop Dogg, Ryan Tedder, Tay Keith and Paul Rosenberg. Proceeds were earmarked for hiring in engineering and design and for marketing.

$20M source ↗

Jul 2023
Platform opens to all artists

After operating invite-only with roughly 500 artists, Sound.xyz opened uploading and NFT minting to any artist, who could set their own prices and retain 100% of master and publishing rights.

source ↗

Dec 2021
$5M seed round announced

Sound announced a $5 million seed round; Andreessen Horowitz led the seed financing.

$5M source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

In the news

Research sources · 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Sound.xyz do?
Sound.xyz was a web3 music platform for minting and collecting songs as NFTs; it went offline in January 2026.
Who founded Sound.xyz?
Sound.xyz was founded by David Greenstein in 2021.
Who are Sound.xyz's investors?
Sound.xyz's investors include A.Capital Ventures, a16z crypto, Andreessen Horowitz, Archetype, Coinbase Ventures, Collab+Currency, Ballistic Ventures, Fin Capital and 5 more.