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Dev tools · alternatives · 2026

24 alternatives to Let's Seal – Let's Encrypt for document signing, free and self-hosted

TLDR, Let's Seal gives the finger to Adobe and every doc signing tool (docusign, google, etc) who pay to play with the Adobe Approved Trust List and then charge you for something that should be free. Currently even the person checking if a document/contract is sealed or code is authentic has to also be inside the same Adobe walled garden too. Verification, the part that should be free is the part everyone charges for. Thats the shape Let's Encrypt fixed for TLS, and I wanted the same thing for documents and files. The core idea therefore needed to go a bit beyond e signatures and i…

Let's Seal is a free, self-hosted tool for digitally signing and verifying documents and files without vendor lock-in. It implements an open standard that chains signatures to a public certificate authority, logs… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites.

  1. 1SV
  2. 2

    Enterprise-Level Document Signing Goes Open-Source

    2023 · opensignlabs.com · its alternatives →

  3. 3
    Sealit▲509

    Simple data security to get compliant & stay productive

    2023 · its alternatives →

  4. 4

    🔥 The free & Open Source DocuSign alternative. Contribute to OpenSignLabs/OpenSign development by creating an account on GitHub.

    2023 · github.com · its alternatives →

  5. 5

    A new Certificate Authority - free, automated, and open.

    2015 · letsencrypt.org · its alternatives →

  6. 6

    Sign documents for free, with or without an account

    2023 · app.documenso.com · its alternatives →

  7. 7

    Free SSL/TLS certificates.

    2019 · letsencrypt.org · its alternatives →

  8. 8

    Secure Document Signing & Verification Powered by Blockchain

    2018 · blockusign.co · its alternatives →

  9. 9

    Simple, intuitive and binding e-signatures, absolutely free

    2021 · useanvil.com · its alternatives →

  10. 10
    SealItDonefrom $2.99/mo▲3

    Legally binding e-signatures for $2.99. No subscriptions.

    Jul 2026 · sealitdone.io · its alternatives →

  11. 11

    Encrypt/password protect PDF for free

    2023 · onepdf.online · its alternatives →

  12. 12

    Open legal documents, provided and trusted by people like you. Find or upload a document, sign it for free.

    2013 · docracy.com · its alternatives →

  13. 13

    Sign yourself or get documents signed. Easy, secure, legally binding and free.

    2017 · signrequest.com · its alternatives →

  14. 14
    Seald SDK▲108

    Protect your users' data with end-to-end encryption.

    2021 · seald.io · its alternatives →

  15. 15AR

    From the cryptic terminal commands to the innumerable ways to shoot yourself in the foot, I always struggled to use TLS certificates. I love how much easier (and cheaper) Let's Encrypt made it to get certificates, but there are still plenty of things to struggle with. That's why we built Relay: a free, browser-based tool that streamlines the ACME workflow, especially for tricky setups like homelabs. Relay acts as a secure intermediary between your ACME client and public certificate authorities like Let's Encrypt. Some ways Relay provides a better experience: - really fast, streamlined…

    2025 · anchor.dev · its alternatives →

  16. 16

    Discover OpenSign™, the leading open-source DocuSign alternative for secure & reliable PDF document signing. Our platform offers state-of-the-art encryption, a user-friendly interface & robust API support, making it the go-to solution for individuals and businesses seeking an open-source alternative

    2023 · opensignlabs.com · its alternatives →

  17. 17

    Sign sensitive documents without sacrificing your privacy.

    2018 · its alternatives →

  18. 18
    DocuSec▲65

    Simplest secure sign documents

    2022 · its alternatives →

  19. 19

    Effortless and secure online document signing for free

    2025 · signdocfree.com · its alternatives →

  20. 20

    Woke up today with a 100-degree fever & found out Google is now our competitor. Last week, we started building signwith.co/ - a simple, pay-per-use e-signature tool for people who are struggling with complex e-sign tools. The plan was to build quietly, run a private beta, get 50 users in 15 days, and then do a launch. Easy peasy. But since Google dropped into the e-signature space - we needed to talk. So after 30 minutes of existential dread, a lot of “what are we even doing?” thoughts, and one strong dose of paracetamol we said, screw it. - let’s change gears. So now we're opening our…

    2024 · signwith.co · its alternatives →

  21. 21

    Seal SECURE eSignature on PDFs within iOS

    2015 · its alternatives →

  22. 22

    Free & Easy Document Sharing and Signing – Streamline Now

    2024 · its alternatives →

  23. 23FP

    2016 · signandreturn.com · its alternatives →

  24. 24

    Electronically sign documents for free.

    2018 · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →