CostUse

API usage cost calculators

Choose the exact service you use. The calculator keeps the provider’s billing unit visible so a per-message rate is never confused with a per-minute or per-request rate.

SparkPost

Email delivery API with plan packages and per-thousand overage list rates.

Speechmatics

Multilingual speech-to-text API with published per-hour batch and realtime model rates.

Stability AI

Stable Diffusion image APIs billed per generation credit or image.

Statsig

Experimentation and feature platform with published Pro metered-event overage rates.

Stripe

Payment infrastructure priced mainly as a percentage plus fixed fee.

Stytch

Auth platform with published SSO/SCIM connection and fingerprint overage rates.

Telnyx

Wholesale messaging and voice APIs with public US SMS list rates.

Textmagic

Business SMS and email with a flat public US per-SMS credit rate.

Together AI

Open-model serverless inference, image, audio, and dedicated GPU endpoints.

Twilio

Communications APIs priced per message, minute, or phone number.