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PandaDoc vs OpenSign: catalog facts
PandaDoc	OpenSign
Freemium A free trial is offered, and the fuller business features need a paid plan.	Freemium The open-source software is free to self-host. A hosted plan is paid.
Android, iOS, Web	Web, Self-hosted
Handles creation, approval, signing and payment in one place Signing order, signer identity checks and notarization	Self-hostable, so signed documents and audit trails stay with you Templates, signing order and an API for integration
Aimed at business teams rather than occasional personal use Homepage pushes demos and trials over a clear free tier	Legal weight of signatures depends on your jurisdiction and configuration Younger and less polished than the commercial services
Downloadable app, Web application	Self-hosted, Web application
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.