Alternatives to Adobe Acrobat Sign in 2026

DocuSeal docusealco

Open source DocuSign alternative. Create, fill, and sign digital documents ✍️

Complete system Production-ready You want DocuSign-style e-signatures without per-envelope fees and can run a Docker container.

★ 19k AGPL-3.0 Ruby Active, pushed today

Documenso documenso

The Open Source DocuSign Alternative.

Complete system Production-ready A business wants an open DocuSign alternative with an API it can embed in its own product.

★ 16k AGPL-3.0 TypeScript Active, pushed 5 days ago

Core LibPDF-js

A modern PDF library for TypeScript. Parse, modify, and generate PDFs with a clean, intuitive API.

Building block Experimental You need PDF manipulation and signing in TypeScript beyond what pdf-lib offers.

★ 1.8k MIT TypeScript Active, pushed 7 days ago

DSS esig

Digital Signature Service : creation, extension and validation of advanced electronic signatures

Building block Production-ready You build software that must produce or validate eIDAS-compliant signatures in the EU.

★ 1k LGPL-2.1 Java Active, pushed 19 days ago

Node-signpdf vbuch

Simple signing of PDFs in node.

Building block Usable Your Node.js app must cryptographically sign generated PDFs.

★ 943 MIT JavaScript Active, pushed 13 days ago

LibreSign LibreSign

Control how your documents get signed

Integration Usable Your organisation already runs Nextcloud and wants document signing inside it.

★ 838 AGPL-3.0 PHP Active, pushed 5 days ago

Signaturepdf 24eme

Free open-source web software for signing PDF (alone or with others) and also organize pages, edit metadata and compress pdf

Complete system Usable An organisation wants simple self-hosted PDF signing and page tools, for example on YunoHost.

★ 832 AGPL-3.0 JavaScript Active, pushed 12 days ago

pyHanko MatthiasValvekens

pyHanko: sign and stamp PDF files

Building block Usable You need standards-compliant PDF signing or validation in Python.

★ 794 MIT Python Active, pushed yesterday

SignServer CE Keyfactor

SignServer – Open source, PKI-based signing software to sign code, documents, timestamps and more.

Complete system Production-ready Your organisation needs central, audited code or document signing with keys kept off developer machines.

★ 441 LGPL-2.1 Java Active, pushed 2 months ago

Letsseal letsseal

The open standard for proving any file is real, unaltered and sealed

Framework or platform Experimental You are exploring file provenance and timestamping and want to try a new approach.

★ 377 Apache-2.0 JavaScript Active, pushed 14 days ago

Pdfsign digitorus

Add/verify Advanced Electronic Signature (AES) and Qualified Electronic Signature (QES) in PDF (using pure Go)

Building block Usable A Go service must sign or verify PDFs to eIDAS levels.

★ 171 BSD-2-Clause Go Active, pushed 7 days ago

Pdf-sign svenssonaxel

A tool to sign PDF files. With Linux support.

Developer tool Usable You need to stamp a handwritten-style signature onto a PDF without a commercial app.

★ 164 MIT Python Slowing, pushed 5 months ago

PandaDoc PandaDoc

American software company

Complete system Production-ready A sales team wants to build proposals and quotes from CRM data and get them signed in one flow.

230 readers a month Since 2013 Commercial

DocuSign eSignature Docusign, Inc.

eSignature | Send and esign agreements with the world's #1 electronic signature solution. | Docusign

Complete system Production-ready Your counterparties expect DocuSign, or you need enterprise integrations and compliance features.

Commercial

Zoho Sign Zoho Corporation

Digitally sign business documents online with Zoho Sign. Automate paperwork using complete digital signature document workflows to collect signatures securely.

Complete system Production-ready A business on Zoho wants e-signatures inside its existing apps at low cost.

Commercial

SignNow airSlate

Sign documents with airSlate SignNow’s legally-binding eSignature trusted by millions. Enjoy a seamless online signature experience anytime, anywhere, on any device.

Complete system Production-ready A small business wants e-signatures cheaper than DocuSign.

38 readers a month Since 2011 Commercial

OneSpan Sign OneSpan

OneSpan Sign streamlines digital agreement workflows with secure eSignatures, identity assurance, automation, smart forms, and integrations. See 200+ features.

Complete system Production-ready A bank, insurer or government agency needs signing with strong identity assurance and deployment control.

Commercial

iText DITO and pdfSign Apryse

The leading Java and C# PDF Library SDK. A programmable Java and .NET PDF SDK library to create, manipulate and edit PDF documents. Convert Html files to pdf, Debug pdf files, extract data from PDF and more.

Building block Production-ready A Java or .NET application needs to generate or digitally sign PDFs in-process with mature tooling.

Commercial

Dropbox Sign Dropbox, Inc.

Dropbox Sign (formerly HelloSign) is the easiest way to send, receive and manage legally binding electronic signatures. Try it free!

Complete system Production-ready A product team wants to embed signing in its own app with a clean API, or a small team wants simple signing.

Commercial

SignWell SignWell

Get your documents signed 40% faster with zero-setup electronic signatures. SignWell helps you cut turnaround time and makes it easy for everyone to electronically sign your documents.

Complete system Usable A freelancer or small business occasionally needs documents signed and wants something cheap and quick.

Commercial

Yousign Yousign

Youtrust (ex Yousign) is a complete digital trust platform combining eSignature, identity verification and KYC services.

Complete system Production-ready A European business needs eIDAS-compliant signatures, including qualified ones, from an EU-hosted provider.

Commercial

Skribble Skribble

Ihre E-Signatur Lösung für alle Dokumente: ✓ QES ✓FES ✓ EES ✓rechtsgültig ✓ gehostet in Deutschland ✓ DSGVO-konform ►Jetzt kostenlos testen!

Complete system Production-ready A Swiss, German or Austrian business needs legally strong qualified signatures with local data hosting.

Commercial

Apryse SDK Apryse

Integrate document processing capabilities into any software applications. Generate, convert, view, edit, and sign pdf and documents easily.

Building block Production-ready Your product needs a full in-app document viewer and editor and you can pay for a commercial SDK.

Commercial