Hydra by Rightsify vs Google Flow Music (formerly Riffusion)

Hydra by Rightsify is an AI music generation model for creating copyright-cleared instrumental tracks and sound effects from text prompts. It is built for businesses, content creators, and artists who need original background music for videos, games, streaming, podcasts, and commercial media without navigating traditional licensing hurdles.

Hydra is trained on Rightsify-owned catalog data and focuses on instrumentals rather than vocals. Users describe genre, instrumentation, tempo, mood, and context in a prompt, then generate clips typically ranging from short samples up to around two minutes. Hydra II expanded the model with a larger training dataset, multilingual support, and editing tools such as remixing, looping, fade controls, mastering, stem separation, and audio trimming.

Rightsify positions generated output for commercial use under its copyrights, and the company has also pursued ethical AI certification through Fairly Trained. API access is available for developers who want to integrate text-to-music generation into their own products.

Google Flow Music lets you create full-length songs, remix tracks, and publish music through a conversational studio built on Google's Lyria 3.5 model. riffusion.com now redirects to flowmusic.app, where you chat with Producer like you are in a session, iterate on vocals and arrangement, and export finished tracks.

Unlike one-shot music generators that spit out a clip and stop, Flow Music focuses on iterative editing. Replace and Extend let you swap specific sections or continue a song past its endpoint without regenerating the whole track. You can also direct Veo-powered music videos, split stems, apply audio effects, and vibe-code custom instruments or mini apps inside Spaces.

The free tier includes daily top-up credits and two concurrent generations with no credit card required. Paid plans raise monthly credits, concurrent generation limits, and add member perks. Google acquired the Riffusion team in 2026 and folded the product into Google Labs alongside Lyria and Veo.