Alternatives

Products that do what iTellu does

Write it now. Open it when you decide. With certified proof.

1
yousaidthat.org▲63
Prove that you said things before anyone else
Jun 2026 · yousaidthat.org
2SV
Seal – Verifiable timestamp for your private ideas▲113
2022 · docs.planet.ink
3
Proof.ink▲100
Proven immutable data stored on the Steem blockchain
2019
4
Proofy▲181
Quickly validate and verify your email lists.
2016
5
Enclosed▲143
Send private and secure notes
2024
6WM
Writt – Make and publish notes from Telegram▲77
2018 · writt.glitch.me
7
Inscribe▲112
A protocol for rich, verified signatures on any NFT
2021
8LS
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
9
Plutto Declarations▲140
Create and send declarations, contracts and forms in minutes
2023
10
Writt▲126
Make rich shareable notes within Telegram
2018
11
Set in Block▲77
Blockchain-based permanent message creator and reader
2018
12
Sign and Send▲154
Sign a document online and have it physically sent
2016
13
LayerProof Kraft ▲91
Co-write insightful long form content
May 2026 · layerproof.app
14
Foresaw.app▲4
Write it. Seal it. Let time prove you foresaw it
Jul 2026 · foresaw.app
15
Woleet▲73
Bitcoin-anchored proof that documents are authentic
May 2026 · woleet.io
16
Crypton.sh - SMS▲85
Secure Anonymous SMS in the cloud (and a phone number)
2018
17IM
I made a new kind of Trusted Timestamp based on plaintext encoding▲5
I've just launched a new site that creates Trusted Timestamps. Anyone can use it to make any data immutable going forward in time. By "verifying" a Trusted Timestamp against a file, you certify that file has not been altered since the time the Trusted Timestamp was created at. Trusted Timestamps are not a new idea, there is a standard defined in RFC3161 and some other prior work as well. My design though is different as it is based on plain-text, human readable files. I believe this makes this form of Trusted Timestamp more accessible for a wider set of applications. I found the RFC3161…
2024 · timestampit.com
18
SBIX Certify▲13
✨ Instant legal proof-of-existence for any document.
Dec 2025
19
Parchment▲13
Parchment is a fast, minimal notebook with a full REST API.
Apr 2026 · theparchment.app
20
Writed▲12
Chat with your journal. Nothing leaves your browser
Jul 2026 · writed.app
21IP
Instantly pass your passwords securely▲31
Hey HN! I made a service to share passwords easy and secure but never promoted it. It's called instapass.io I noticed that people besides my friends and clients actually started to use, so maybe it will be helpful for you too! You share one-time self-destruct message using one time links and I won't even be able to see what you wrote. How does it work? When you generate a message the client-side makes a random password and use that to encrypt the message. The password is appended as an anchor tag which all modern browsers never send to the server. This way, I don't even know what you shared.…
2019
22
TimeWill▲7
Write letters to the future. Encrypt passwords for family.
Jul 2026 · lasalu.cn
23
kysigned▲13
E-sign documents by forwarding an email. $0.25.
Jul 2026 · kysigned.com
24
TimeProof▲5
Prove it existed. Permanently.
Jan 2026

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