D4Sign API vs Xodo Sign

D4Sign API has no write-up on Specifiction yet; its figures are above.

Xodo Sign is an electronic-signature service with iOS and Android apps, API access, templates, bulk sending, and audit trails. People can sign on computers, tablets, or phones, and signed documents receive timestamped records of actions. Team controls let members be invited, assigned roles, and given permissions. The PDF editor can redact, annotate, reorder, and edit documents. Integrations include Gmail, Chrome, Drive, Google Docs, Dropbox, Evernote, OneDrive, and Box; API workflows include embedded signing and requesting, automation, and webhooks. Listed standards include AICPA SOC II, GDPR, eIDAS, and UETA. Financial-services workflows are described as having built-in encryption and full audit trails. Free signup does not require a credit card. The Free plan is free and includes one document per week, one signer, one seat, and zero active templates. Personal is $3 a month billed annually ($36/year); Basic is $10 a month billed yearly, and Professional is $16 a month billed yearly. A seven-day trial is offered for Basic and Professional.