On-Demand is great for testing and comes with up to 40 minutes of TTS or 170 minutes of STT for free. Creator is for content creators and small projects; it unlocks audio downloads and more custom voices. Developer is for production apps; you get up to 20% off rates, workspace creation and sharing, higher API and concurrency limits, and priority email support. Growth is for high-volume production use-cases; it offers up to 40% off rates, even higher API limits, 3,000 custom voices, and compliance add-ons. Enterprise is fully custom with rates as low as $10/1M chars on Realtime TTS-2 & 1.5 Max and $5/1M on 1.5 Mini —
contact sales.