Compare the Top Digital Signature Software for Startups as of April 2025

What is Digital Signature Software for Startups?

Digital signature software, also known as electronic signature or e-signature software, provides users with the cryptographic tools to capture secure digital signatures, sign documents electronically, and attach signature images to electronic documents. Compare and read user reviews of the best Digital Signature software for Startups currently available using the table below. This list is updated regularly.

  • 1
    SODA PDF

    SODA PDF

    LULU Software

    Soda PDF is the software solution that helps your business quickly achieve any document goal with ease. Edit, create, convert, merge, split, sign, or secure PDFs to your needs. Modify documents using the best PDF editor and PDF converter. Our easy-to-use PDF tools are made to streamline any document workflow with efficient results. With the fastest Microsoft Office to PDF converter on the market, our Batch tool helps you create or convert multiple PDFs at once, along with the ability to add page numbers, watermarks, Bates numbering & secure permissions to multiple files or folders in seconds. Keep a safe distance between people and paper by signing, managing & tracking electronic signatures remotely using our efficient E-Sign feature. Save time & avoid retyping with OCR Edit to quickly search, recognize & modify text contained within any scanned document or image file. Access Soda PDF’s entire suite of tools & services directly from your desktop, or from any device with a web browser.
  • 2
    Nitro Pro

    Nitro Pro

    Nitro Software

    Escape the trap of complex licensing and boost user satisfaction with enterprise-grade PDF solutions you can easily scale across your business. By equipping more employees with a high-value PDF solution, you can increase individual productivity while improving data security, minimizing printing, and reducing paper waste. As the first and leading replacement for Adobe Acrobat, Nitro Pro delivers equally powerful performance and robust features—at half the cost. A Microsoft Office–like interface ensures an intuitive experience and shorter learning curve for even first-time users. Whether you’re working with contracts, forms, spreadsheets, blueprints, or beyond, Nitro gives you the tools to simplify PDF editing and eSigning.
    Starting Price: $128 per user
  • 3
    Smallpdf

    Smallpdf

    Smallpdf

    Made in Switzerland, the land of watches, banks, and clean design, Smallpdf is an award-winning company that offers a suite of clever document management tools for everyone—for work, for home, for life. Founded in 2013, Smallpdf provides a simple, secure, and reliable answer to heavy, awkward PDF software. By removing unnecessary features and adding a deep focus on user experience, Smallpdf has become the most-loved and most-trusted PDF software on the planet, serving over 500 million users, 100,000 different companies, in 24 different languages, and in every country in the world—even Antarctica! Smallpdf integrates seamlessly with professional and personal tasks, boosting productivity and simplifying the way people manage their documents, with tools to compress, convert, edit, sign, protect, and unlock PDF documents in just a few easy steps.
    Starting Price: $7/month/user
  • 4
    UPDF

    UPDF

    Superace Software Technology Co., Ltd.

    UPDF supports editing, annotating, and managing PDF seamlessly on for Windows, Mac, iOS and Android. You can get every tool you need to edit, annotate, and organize your PDF files in one premiere all-rounder smart application. It is explicitly designed to meet the desire of most users for a stunning yet very comprehensible interface that is not just only for beginners. Key Features: 1. Edit PDF Document - You can add or delete texts as well as edit the text's properties and formats such as its font style, font color, and size. - You can also crop, rotate, replace, extract or delete images. 2. Annotate PDF - Easily highlight, underline, and strike out those parts. You can also add shapes, sticky notes and text boxes for a quicker and easier means of adding texts. 3. PDF Page Management - Rotate, delete, extract and rearrange PDF pages as you need. 4. View and Navigate PDF Files - Flexible reading mode such as single page mode or double-page mode.
    Starting Price: Free
  • 5
    iLovePDF

    iLovePDF

    iLovePDF

    Every tool you need to work with PDFs in one place. Every tool you need to use PDFs, at your fingertips. All are 100% FREE and easy to use! Merge, split, compress, convert, rotate, unlock and watermark PDFs with just a few clicks. Combine PDFs in the order you want with the easiest PDF merger available. Separate one page or a whole set for easy conversion into independent PDF files. Reduce file size while optimizing for maximal PDF quality. Convert your PDF to WORD documents with incredible accuracy. Convert your PDFs to POWERPOINT. Sign and certificate PDF documents. Request for digital signatures or sign your own documents.
    Starting Price: $7 per month
  • 6
    Lumin PDF

    Lumin PDF

    Lumin PDF

    We are the bridge between paper and the cloud, our seamless PDF workflows help you achieve greater impact with less administration. Edit PDFs within Google Workspace. Open Lumin directly from Gmail, Google Drive, or Google Classroom. Uploading old documents to the cloud has never been easier. Get your team on the same page with real-time feedback and manual tools. Submit work, negotiate terms, and sign everything with Lumin Sign. Enjoy our comprehensive free plan for K-12 teachers and students. Our products are implemented using a rigorous and constantly updated security system. We also have a Google-verified storage system that ensures your files never have to leave Google Drive. Collaborate with your current colleagues and attract new ones with Lumin and Lumin Sign. Our innovative solutions are great on their own, but together they're even better. Lumin reduces the comings and goings of your team. With a cloud workspace integrated with Google, you can collaborate in real-time.
    Starting Price: $9 per month
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