What are the API pricing models for Australian e-signature providers?

Australian e-signature providers typically employ subscription-based, per-envelope, or usage-tiered pricing models for their APIs. Subscription models charge a fixed monthly or annual fee for a set number of API calls or envelopes, suitable for predictable volumes. Per-envelope pricing bills based on the number of documents processed via API, often with volume discounts for higher usage. Usage-tiered models scale costs according to API transaction volume, starting with lower rates for basic access and increasing for enterprise-level integrations.