Inworld AI vs Cartesia: Features, Pricing and User Reviews 2026

Inworld AI offers six plans to fit different needs. The On-Demand plan is free and includes up to 70 minutes of text-to-speech, 100 custom voices, and access to the Realtime API and LLM Router.

Paid plans start with Creator at $25 a month, then Builder at $100, Developer at $300, and Growth at $1,500 a month, each lowering usage rates and raising custom voice and concurrency limits. Yearly billing brings the effective monthly price down on every paid plan.

Standard text-to-speech is billed per million characters, starting at $25 and dropping to $12.50 on Growth, while speech-to-text is billed hourly from $0.15 down to $0.10.

Enterprise plans offer custom pricing, on-premises deployment, and rates as low as $5 per million characters.

Cartesia offers five pricing plans, from a free plan to a custom Enterprise option, so both small projects and large companies can find a fit.

• Free ($0/month): 20K credits a month plus $1 in prepaid agent usage, with access to Text to Speech and Speech to Text.

• Pro ($5/month): 100K credits a month, commercial use rights, and instant voice cloning.

• Startup ($49/month): 1.25M credits a month, professional voice cloning, and organization accounts.

• Scale ($299/month): 8M credits a month, priority support, and higher concurrency limits.

• Enterprise (Custom pricing): Custom credits, volume pricing, custom concurrency, SSO, and compliance agreements.

Extra charges apply for things like phone numbers ($0.014 per minute) and voice agent call minutes ($0.06 per minute), and subscriptions can be paused or cancelled anytime.