Open-source Adobe Acrobat Sign alternatives

DocuSeal is an open-source platform for filling and signing documents online. Users build PDF forms with a visual field builder and send them to be completed and signed on any device through a mobile-optimized web interface. It is presented as an open-source alternative to DocuSign.

The builder offers 12 field types, including signature, date, file and checkbox, and a document can have multiple submitters. DocuSeal sends automated emails over SMTP, applies automatic PDF e-signatures and verifies PDF signatures. Files can be stored on disk or in AWS S3, Google Storage or Azure, and an API and webhooks support integrations. The interface ships in 7 languages, with signing available in 14.

The core is released under AGPL-3.0 and built with Ruby on Rails, Vue and Tailwind CSS. It can be deployed with Docker, using SQLite by default or PostgreSQL and MySQL through a database URL setting, and one-click options exist for Heroku, Railway, DigitalOcean and Render. Paid Pro features include white-labeling, SSO/SAML, bulk send and embedded signing, and a hosted cloud version is available.

Documenso is an open-source alternative to DocuSign for signing documents digitally. Its stated aim is to build trust by letting people self-host the software and review how it works, rather than relying on a closed signing provider. It is released under the AGPL-3.0 license.

The product lets teams create templates, build signing workflows and integrate signing into other systems. Repository topics mention PDF signatures, digital signatures following the PAdES standard, e-signatures, PostgreSQL and Prisma. The README lists a stack of TypeScript, React Router v7, Hono, Prisma and Tailwind CSS with shadcn/ui and Radix UI components.

You can try it by self-hosting or by signing up on documenso.com, and an Enterprise plan is offered to large organizations that need extra flexibility and control. The maintainers have paused external pull requests apart from a small group of trusted contributors and ask for detailed issues instead, while keeping the code open to read, audit, run and fork.

OpenSign is an open-source document e-signing platform presented as an alternative to commercial services such as DocuSign. Its README also names PandaDoc, SignNow, Adobe Sign, Smartwaiver, SignRequest, HelloSign and Zoho Sign as products it aims to replace. The project's mission is to make document signing accessible and straightforward for everyone.

Users sign PDF documents with a signing pad that supports hand-drawn signatures, uploaded images, typed signatures and saved signatures, and documents can be annotated. The interface offers options such as signing yourself, templates, one-click signatures and a drive for stored files. A cloud-hosted free version exists, and the code can also be self-hosted.

The stack is JavaScript with React, Node.js and MongoDB. The project provides help docs, an API reference, a blog and a Discord community. Because it handles legal documents, buyers should review its licensing terms in the repository, since the license field is not a standard identifier. It suits individuals and small businesses that sign contracts or forms regularly.