Riffusion

What is Riffusion?

Riffusion is an AI music generator that now operates as Google Flow Music, a web and iOS service writing full songs with vocals from text requests. Visiting riffusion.com today redirects to flowmusic.app.

The project began in December 2022 as an open-source hobby experiment by Seth Forsgren and Hayk Martiros, which generated music by treating audio spectrograms as images. It went viral, raised a reported $4 million seed round in October 2023 and grew into a consumer song app.

Three changes followed. The service relaunched as ProducerAI in July 2025, Google acquired it on 24 February 2026 with the team joining Google Labs and DeepMind, and in April 2026 Google renamed it Flow Music. It is live and still developing, so this review covers the current Flow Music product under the Riffusion name.

Key Features

Lyria 3 and Gemini now drive the product, so you get full vocal songs from a chat request plus editing, stems, artwork and video in one space.

• Full song generation: Flow Music writes complete tracks with vocals, lyrics and arrangement from a text request. Reports on the April 2026 relaunch put the length limit at about three minutes per song using Lyria 3.
• Chat-based direction: Gemini powers a conversational interface, so you describe changes in plain language rather than editing settings. You might ask for a slower tempo, a different singer or a darker mood and hear a new take.
• Remix and edit tools: Songs can be covered, extended or have single sections replaced without starting over. This keeps a verse you like while you rework a weak chorus or swap a guitar solo for synths.
• Stem splitting: The workspace separates vocals and instruments into stems, and paid plans list stem downloads. Producers can then move parts into their own audio software for mixing, sampling or live performance.
• Artwork and music videos: Nano Banana creates cover art and Veo generates music videos inside the same project. A finished release can include audio, a cover image and a short video without switching apps.
• Vibe-coded instruments: The Flow Music homepage describes building new instruments by describing them in plain language. Google calls this vibe coding, and it lets curious users experiment with custom sounds and small music apps.

Pros

Price is Riffusion’s strongest argument, because the free tier refreshes credits daily and paid plans start at $6 a month.

• Generous free start: The free tier gives daily top-up credits and two concurrent generations without a card. Hobbyists can write full songs regularly without paying anything at all.
• Cheap paid entry: The Starter plan costs $6 a month for 3,000 credits, which the pricing page equates to about 600 songs. That is one of the lowest per-song costs among major music generators.
• Strong Google models: Lyria 3, Gemini, Veo and Nano Banana now run the service after the February 2026 acquisition. Users benefit from large-scale research and frequent model updates rather than a small startup roadmap.
• Editing after generation: Cover, extend, replace and stem tools let you keep working on a track after the first draft. Songwriters gain control closer to a basic studio than a one-shot generator.
• Clear AI labelling: Outputs carry SynthID watermarks that identify them as AI-generated. Creators who publish openly can show provenance, which helps with platform and distributor policies on synthetic media.

Cons

Rights remain the open question with Riffusion, since commercial ownership of AI songs is legally unsettled and the service now sits under general Google terms.

• Name changes cause confusion: Riffusion became ProducerAI in July 2025 and Google Flow Music in April 2026. Old tutorials, links and directory listings often describe features or prices that no longer apply.
• Uncertain music rights: The terms link now points to Google’s general Terms of Service, and copyright protection for AI-made songs remains unsettled in many countries. Check the current terms before releasing or licensing tracks commercially.
• Training data dispute: Press reports describe litigation from independent musicians claiming Lyria 3 was trained on YouTube recordings without permission. Labels and distributors may treat AI tracks cautiously while such cases continue.
• No public developer API: We found no documented API for Flow Music itself, unlike the original open-source Riffusion model. Developers wanting automated generation must look at Google’s wider AI platforms or other services instead.
• Credits end with subscription: The pricing page notes that monthly credits are only available while a paid subscription is active. Pausing a plan therefore loses unused allowance, so match your tier to steady output.

Who is Using Riffusion?

Hobby songwriters and online creators make up most of Riffusion’s audience, with some producers using it for sketches and stems.

• Hobby songwriters: Amateur musicians use the free tier to turn lyrics or ideas into finished demos. Many share results with friends or online communities.
• Content creators: YouTubers and streamers generate background tracks and short music videos. They value having audio, artwork and video in one place.
• Producers: Working producers split stems and pull parts into their own software. They use generated ideas as sketches rather than final masters.
• Brands and marketers: Small marketing teams draft jingles and campaign soundtracks for testing. They confirm commercial rights before any paid release.

Pricing

Google Flow Music offers a free tier and three paid plans from $6 to $48 a month (official pricing page, October 2026).

Futurepedia still lists Riffusion as completely free with no premium tiers, which reflects the early version rather than the current paid plans.

Disclaimer: Google has renamed and repriced this service twice in a year, so expect the plan line-up to keep shifting.

What Makes Riffusion Unique?

Its path from open-source experiment to Google product is unusual: few music generators have moved from a spectrogram hobby project to running on a major lab’s own models. The current service blends Lyria 3 audio, Gemini chat, Veo video and Nano Banana images in a single project.

Editing depth is the practical difference. Many rivals produce a song and leave you to regenerate it, while Flow Music lets you cover, extend or replace sections and split stems, which suits people who treat AI output as a starting draft.

Compatibilities and Integrations

A Google sign-in and a browser are all Flow Music needs, with an iOS app for phones and exported stems for other music software.

• Platforms: Flow Music works at flowmusic.app on desktop and mobile browsers. The homepage links an iOS app.
• Accounts: Access uses a Google account, and the terms link redirects to Google’s Terms of Service. Workspace or age limits may apply.
• Audio export: Paid plans list stem downloads for use in digital audio workstations. This suits producers who mix elsewhere.
• Provenance: SynthID watermarks are embedded in outputs. Platforms and detectors can identify the tracks as AI-generated.
• Developers: No public Flow Music API was found. The original open-source Riffusion code remains a separate, older project.

Riffusion Tutorials

A first song takes only a few minutes on the free tier at flowmusic.app.

1. Open flowmusic.app in a browser or install the iOS app, then sign in with a Google account.
2. Describe the song you want, including genre, mood, tempo and subject.
3. Listen to the draft and ask for changes in plain language through the chat.
4. Use extend, replace or cover to rework sections you want to improve.
5. Split stems or create artwork and a video if you need a full release.
6. Read the current terms before publishing or monetising the track.

How We Rated It

Riffusion lands at 3.9 out of 5, lifted by cheap plans and editing depth but held back by unclear rights and no public API.

Summary

Riffusion, now Google Flow Music, suits hobby songwriters and creators who want full vocal songs and editing tools at a low price. Google’s models and the daily free credits make it easy to try. The main limitation is legal clarity, since rights in AI-generated music are unsettled and a training data dispute is reported. Frequent rebrands also mean older guides are often wrong. Before releasing a track, read the current Google terms and keep your prompts and edits as a record of your own creative input.