Adobe Acrobat Sign vs Signaturepdf
Adobe Acrobat Sign and Signaturepdf are both e-signature software. Adobe Acrobat Sign is a commercial product from Adobe Inc. Signaturepdf is open source under AGPL-3.0, with 832 GitHub stars.
Which to pick
- Pick Adobe Acrobat Sign when
- An organisation already pays for Acrobat or Adobe enterprise licences and wants signing included.
- Pick Signaturepdf when
- An organisation wants simple self-hosted PDF signing and page tools, for example on YunoHost.
Side by side
Adobe's e-signature service, built into Acrobat and integrated with Microsoft 365 and Salesforce.
A web app for signing PDFs alone or with others, and for merging, reordering, compressing and editing PDF metadata.
Admin and pricing are bundled into Adobe's complex licensing.
Signatures are visual, not qualified electronic signatures with legal certificates.
Production-ready
Usable
Cloud service, desktop app and mobile app
Self-hosted server
Not published
PHP and JavaScript
Closed source, sold by Adobe Inc.
Open source, AGPL-3.0 (network copyleft)
Closed source: you use it under the maker's terms and cannot change or resell the code.
Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.
99 Wikipedia readers a month on phones
832 GitHub stars
Not known
Established: started 5 years ago, latest release v1.11.0.
Other comparisons
More e-signature apps
Both sides were judged on 2026-11-03 from makers' descriptions, Wikipedia, READMEs and GitHub data. License, age and popularity lines are worked out directly.