ONCE
ONCE is an AI music distribution platform with a chat-based release agent, real-time copyright scanning, and an Artist Compensation Fund.
What is ONCE and how does it work?
ONCE is a Nashville-based AI music distribution platform that delivers AI-generated and human-recorded music to Spotify, Apple Music, and roughly 20 other DSPs. Releases run through a chat-based AI agent that collects metadata, scans audio for copyright matches in real time, and submits the release without forms. Co-founded by Grammy-winning mix engineer F. Reid Shippen and product builder Chris McMurtry, ONCE positions itself as the ethical AI distributor. Every AI release routes roughly $0.92 of its fee to working musicians via the ONCE Music Generation and Artist Compensation Fund, the mechanism that launched in April 2026 alongside the platform’s built-in AI generator.
How it works:
- Sign up at once.app and start a release chat with the AI release agent
- Upload audio (WAV preferred, MP3, FLAC, and MP4 accepted) plus 3000×3000 cover art
- The agent walks you through every required field, scans the file against Vobile’s 100M+ asset library, and asks follow-up questions in the same chat if anything flags
- Confirm the release and pay $1 per human-recorded track or $2 per AI-generated track, one-time fee
- ONCE delivers to Spotify, Apple Music, Tidal, YouTube Music, TikTok, and roughly 20 other DSPs worldwide
Ideal for: independent artists releasing AI music at volume, classical and jazz musicians needing full metadata flexibility, and AI generation users (Suno, Udio, OMG) who want a distributor that screens for copyright before submission rather than after.
How much does ONCE cost?
ONCE uses one-time per-release pricing with no annual subscription and no revenue share.
| Plan | Price | What you get |
|---|---|---|
| Human-recorded release | $1 per release, one-time | Distribution to Spotify, Apple Music, and 20+ DSPs, forever |
| AI release (any generator) | $2 per release, one-time | Same distribution + ~$0.92 to the Artist Compensation Fund + mandatory AI disclosure metadata |
| ONCE Music Generation | Free to generate, $2 to distribute | Built-in ethical AI music generator, only pays when you release |
| Referral | 5 free releases per referred artist | Earned when a referred artist releases a track |
Pricing changes frequently. Verify current plans on the ONCE website before signing up.
For artists releasing fewer than 25 tracks a year, the math beats subscription distributors. Heavy releasers should run their own per-track calculation.
How does ONCE handle copyright on AI music?
Yes, ONCE runs every uploaded file through Vobile’s Search and AI Song Detection inside the release chat, before submission.
- The Vobile library covers 100 million plus assets and returns matches on as little as one second of audio
- The system catches covers, remixes, pitch and speed shifts, mashups, and modified live recordings
- Flags surface in the chat itself, so the agent can ask follow-up questions while context is still loaded
- AI releases ship with mandatory AI disclosure metadata delivered to every DSP
- ONCE Music Generation (OMG) tracks are scanned the same way as Suno or Udio uploads
The full launch context is in our coverage of ONCE’s AI chatbot distribution flow, where co-founder Chris McMurtry breaks down the Vobile architecture and the latency profile that made in-chat ACR possible.
How does ONCE compare to DistroKid and TuneCore?
ONCE and the legacy AI-agnostic distributors solve different problems. The legacy players treat copyright as a post-submission step and price on subscription. ONCE prices per release and screens copyright before submission.
ONCE vs DistroKid
| ONCE | DistroKid | |
|---|---|---|
| Starting price | $1/human or $2/AI release, one-time | $22.99/year unlimited (Musician plan) |
| Core use case | AI + human music with copyright clearance built in | Unlimited human releases for active musicians |
| Key differentiator | Real-time ACR + Artist Compensation Fund | Volume distribution at flat annual cost |
| Free tier | Generation in OMG is free | None |
| Best for | Catalog releasers, AI generators, classical/jazz | Heavy releasers under one annual budget |
ONCE vs TuneCore
| ONCE | TuneCore | |
|---|---|---|
| Starting price | $1/human or $2/AI release, one-time | $14.99/year (single release) |
| Core use case | AI-first distribution with built-in compliance | Single and album distribution with sync licensing add-ons |
| Key differentiator | Artist Compensation Fund + chat-based AI agent | Publishing administration and sync licensing services |
| Free tier | Generation in OMG is free | None |
| Best for | Releasers prioritising ethics and clearance | Artists wanting publishing and sync handled too |
Choose ONCE if you release AI music, need real-time copyright scanning, or want a distributor that screens before submission. Choose DistroKid for high-volume releasing under a flat annual fee. Choose TuneCore if publishing administration matters as much as distribution.
Who is ONCE for?
ONCE makes sense for several specific use cases:
- AI music releasers — Suno, Udio, Sonauto, Mureka, AIVA, and Boomy users who need a distributor that takes AI tracks without burying them in compliance gates
- Catalog uploaders — releasers shipping under 25 tracks a year who beat DistroKid’s flat fee on math
- Classical and jazz musicians — artists releasing repertoire that needs composer, conductor, movement, performer, and instrumentation metadata most distributors hide behind dropdowns
- Ethical AI advocates — artists and labels who want roughly 92 cents of every AI release routing to working musicians
- Developers and AI agent builders — teams plugging Claude or ChatGPT into release flows via the public MCP server
- OMG-only generators — creators who generate inside ONCE Music Generation and want zero friction between generation and distribution
- Releasers prepping for litigation risk — anyone uploading AI tracks who wants pre-submission ACR to catch matches before the file reaches a DSP
The overall fit: ONCE is for releasers who treat AI distribution as a workflow choice with ethical and legal stakes, not a checkbox. Pair it with a deliberate 10-step release strategy and the cost per release pays for itself in catalog visibility.
ONCE FAQs
Is ONCE free to use?
Generation inside ONCE Music Generation (OMG) is free. You can generate as many tracks as you want without paying. You only pay when you choose to distribute a track ($1 per human-recorded release, $2 per AI release). There is no monthly or annual subscription.
Can I use ONCE for commercial releases?
Yes. Every release ONCE distributes is commercially licensed and royalty-keeping. Artists retain 100% of streaming royalties from Spotify, Apple Music, and every other DSP. For AI tracks generated outside ONCE (Suno, Udio, etc.), confirm your source generator’s plan grants commercial release rights.
Does ONCE accept Suno and Udio tracks?
Yes. Suno, Udio, Sonauto, Mureka, AIVA, Boomy, and any other AI generator are explicitly supported, provided the artist holds a plan from the source tool that grants commercial release rights. ONCE charges the same flat $2 AI release fee regardless of which generator produced the track.
What file formats does ONCE accept?
WAV is preferred (44.1kHz, 16-bit or higher). MP3, FLAC, and MP4 are also accepted, with ONCE extracting the audio from MP4 automatically. Cover art needs to be 3000×3000 pixels.
Where does the Artist Compensation Fund money go?
Roughly $0.92 of every $2 AI release fee routes to the audited Artist Compensation Fund. The fund pays established music non-profits today (working musicians and music education). ONCE has published a 12 to 24 month roadmap to pay individual artists directly as attribution technology matures, with quarterly transparency reports showing exactly what flowed in and out.
Can I distribute through ONCE programmatically?
Yes. ONCE publishes a public MCP server at once.app/mcp. AI assistants like Claude and ChatGPT can submit releases, upload audio, and retrieve release schemas programmatically. This is the first MCP-based distribution path among AI music distributors.
