Life & fun · alternatives · 2026

24 alternatives to XSigi

Blockchain-secured signatures and encryption made simple.

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

1
Blocknify▲71
Sign sensitive documents without sacrificing your privacy.
2018 · its alternatives →
2
DL3ARN▲234
Digitize & verify credentials in the blockchain
2023 · its alternatives →
3
Blockusign▲93
Secure Document Signing & Verification Powered by Blockchain
2018 · blockusign.co · its alternatives →
4
DoxyChain▲60
Certificates and eSignatures on the blockchain
2023 · its alternatives →
5
Squarelink▲77
Sign blockchain transactions with just an email and password
2018 · squarelink.com · its alternatives →
6
Blocksign, a Bitcoin service for legally signing any document▲17
Blockchain is a wonderful record keeper that can track every transaction that happens in the string.
2014 · blocksignit.com · its alternatives →
7
Versiobit▲83
Archives your files, versioned and audit-proof by Blockchain
2023 · versiobit.com · its alternatives →
8
QU3▲133
Quantum-safe MCP servers for private, verifiable inference
2025 · its alternatives →
9
Let's Seal – Let's Encrypt for document signing, free and self-hosted▲94
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…
Jul 2026 · github.com · its alternatives →
10
BlockSign▲79
Sign Your Docs Digitally Using Bitcoin
2014 · blocksignit.com · its alternatives →
11
Woleet▲73
Bitcoin-anchored proof that documents are authentic
May 2026 · woleet.io · its alternatives →
12
Gnosis Safe▲63
The first smart contract-based mobile wallet on Ethereum
2018 · its alternatives →
13
Bitcoin-Safe Desktop Wallet (FOSS)▲66
Free & OpenSource software for managing cold storage wallets
Apr 2026 · bitcoin-safe.org · its alternatives →
14
LockChain▲10
Immutable Identity and Data Verification on Bitcoin
2024 · play.google.com · its alternatives →
15
Access Vault▲21
Post-Quantum Credential Management Made Easy
2025 · accessvault.app · its alternatives →
16
Stampd.io - A document blockchain stamping service▲32
Use the public blockchains to timestamp your files with indelible proof. Create non-fungible tokens (NFT) in Cardano.
2015 · stampd.io · its alternatives →
17
EtherSign▲3
Document signing on the blockchain! ✍️
2018 · ethersign.surge.sh · its alternatives →
18
LogSentinel, blockchain-inspired secure audit trail service▲18
2017 · logsentinel.com · its alternatives →
19
WEESIGN▲6
Blockchain based Electronic signature platform
2019 · leewayhertz.com · its alternatives →
20
signyourpdf▲12
Secure PDF signatures with blockchain. Fast & reliable.
2025 · signyourpdf.net · its alternatives →
21
Enclave Sign▲4
Signed. Secured. Delivered.
Jun 2026 · sign.enclave.talk · its alternatives →
22
Cryptowerk Seal▲4
Anchor in blockchains for data integrity - with no wallet!
2019 · cryptowerk.com · its alternatives →
23
Signum – Kotlin Multiplatform Cryptography and PKI Library▲10
An OSS KMP crypto + PKI library with a comprehensive ASN.1 engine. Android and iOS targets come with hardware-backed crypto + key storage, and native biometric auth.
2025 · github.com · its alternatives →
24
QLX▲12
post quantum encryption suite
2025 · 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 →