Dev tools · alternatives · 2026

24 alternatives to Trexo PDF Signer

PDF signing with PAdES, LTV and OCSP

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   open-pdf-sign▲105

   Open-source tool for digitally signing PDFs

   2022 · openpdfsign.org · its alternatives →

2. 2
   Documenso▲760

   Enterprise-Grade Signature Infrastructure for Everyone

   2023 · documenso.com · its alternatives →

3. 3
   OpenSign – Open source alternative to DocuSign▲545

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

   2023 · github.com · its alternatives →

4. 4
   OpenSign™: Open Source DocuSign & more▲109

   Enterprise-Level Document Signing Goes Open-Source

   2023 · opensignlabs.com · its alternatives →

5. 5
   Anvil PDF API▲185

   Twilio for PDFs: esign, fill, generate PDFs with one API

   2021 · useanvil.com · its alternatives →

6. 6
   OpenSign - Open Source PDF Signatures▲3

   Open source solution to sign PDF ddocuments online for free.

   2024 · its alternatives →

7. 7
   DottedSign▲110

   The e-signature solution for your business

   2019 · dottedsign.com · its alternatives →

8. 8
   Agrello e-signatures▲81

   Signing any document made easy, secure & legally binding

   2021 · agrello.io · its alternatives →

9. 9
   PDFZero▲100

   Advanced PDF tools to make your job easier

   2019 · pdfzero.com · its alternatives →

10. 10
    Open-Source DocuSign Alternative▲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 →

11. 11
    PDFlastica▲9

    Sign PDFs offline with typed and drawn signatures

    Jul 2026 · garmahis.com · its alternatives →

12. 12FP
    Free PDF signing over email▲16

    2016 · signandreturn.com · its alternatives →

13. 13
    PDF Signify▲18

    Sign PDFs easily with a digital certificate multiple times

    2024 · pdfsignify.com · its alternatives →

14. 14
    Bulk PDF Signer▲2

    PDF Signer Software,

    2022 · its alternatives →

15. 15
    Contractso ▲17

    The Modern Standard for E-Signatures.

    Jan 2026 · contractso.com · its alternatives →

16. 16
    PDF Sign & Fill▲7

    Best app for signing, editing pdf documents

    2025 · apps.apple.com · its alternatives →

17. 17
    UsefulPDF▲7

    Effortlessly create, manage, and e-sign documents with ease

    2023 · hellobonsai.com · its alternatives →

18. 18
    iScan▲14

    PDF & Document Scanner app

    2019 · play.google.com · its alternatives →

19. 19
    Signatelo▲12

    Affordable e-signature for European SMBs. No BS, just sign

    Oct 2025 · signatelo.com · its alternatives →

20. 20
    Firma Total▲3

    Sign PDFs locally with visible signatures or PAdES

    Aug 2026 · firmatotal.chapalab.com · its alternatives →

21. 21
    Sign PDF - Digital signature▲6

    Sign PDF documents with realistic hand-drawn signatures

    Mar 2026 · play.google.com · its alternatives →

22. 22
    Sign PDF. Add real handwritten signature▲6

    The only PDF signing tool for adding real signature to PDF

    Jul 2026 · sign-pdf.online · its alternatives →

23. 23
    Easy Signature: Sign Documents▲8

    android, googleplayapp, toolapp, digitalsign, documentsign

    2025 · play.google.com · its alternatives →

24. 24
    Pdf Sign by Doctual▲5

    Electronically sign documents for free.

    2018 · its alternatives →

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 →