Dev tools · alternatives · 2026
24 alternatives to Stamp – A Cryptographic Identity System
Hi, everyone. Been playing around with this recently as a sort of PGP successor. It's not all there yet, and I know it's missing some things from PGP, but I figured why not get a start and see what kind of interest/support it might get. https://stamp-protocol.github.io/ Effectively, this is a key management system that allows building and signing ("stamping") various claims about yourself and about others. The eventual goal is to create easy-to-use implementations of the protocol that allow logging in to websites or managing cryptographic keys for various…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Stamp – A Cryptographic Identity System launched in 2021; newer entries below may have overtaken it.
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Stamp▲149The AI Secretary that thinks, writes, and works like you
Mar 2026 · stampmail.ai · its alternatives →
- 3
- 4PC
A little while back I remember seeing a user on a certain anonymous imageboard asking for an invite to a selective email host. Only after a few minutes did the guy realize the perplexity of the situation. How do you insure against a race condition in a public forum with no way to direct message? Luckily, he nabbed the invite code, but it got me thinking about using PGP to provide a solution. This is meant to be a rough PoC and the UX is definitely not ready for the average Joe, but the functionality I'd like to think is there. What catbox.moe is to dropbox is what I'd like this to eventually…
2022 · pubkey.pm · its alternatives →
- 5
Use the public blockchains to timestamp your files with indelible proof. Create non-fungible tokens (NFT) in Cardano.
2015 · stampd.io · its alternatives →
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- 7
Skip migration and launch MCP with built-in Auth
Nov 2025 · arcade.dev · its alternatives →
- 8
Pubky Core▲126Open-source protocol for a decentralized, user-owned web
2024 · pubky.org · its alternatives →
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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 →
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Stampery for iOS▲104Certify voice notes, photos or files using the Blockchain
2015 · apps.apple.com · its alternatives →
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Inscribe▲112A protocol for rich, verified signatures on any NFT
2021 · inscribe.so · its alternatives →
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This is a community forum for people who use, build, and run things on Nostr. Whether you are taking your first steps with keys and zaps, ship relays and clien…
23d ago · nostr-proto.org · its alternatives →
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Simple & secure password manager for teams & individuals
2018 · pcrypt.com · its alternatives →
- 14SV
2022 · docs.planet.ink · its alternatives →
- 15DD
I've been working on something for a while now. It's a combination of a decentralised identity system and a decentralised messaging system that makes use of the aforementioned new identity system. It's based on cryptographic keys with one major property: keys are paired with arbitrary mnemonic strings, e.g. your favourite username, so apps can send messages in a P2P fashion addressed to the strings directly without having to worry about IP addresses. These key-string pairs can be generated on-the-fly on any computer and there's no central database. When multiple people inevitably choose the…
2020 · its alternatives →
- 16DP
2018 · stealthy.im · its alternatives →
- 17AB
Hey HN! We're building an open-source CMS designed to help creators with every part of the content production pipeline. We're showing our tiny first step: A tool designed to take in a Twitter username and produce an "identity card" based on it. We expect to use an approach similar to [Constitutional AI] with an explicit focus on repeatability, testability, and verification of an "identity card." We think this approach could be used to create finetuning examples for training changes, or serve as inference time insight for LLMs, or most likely a combination of the two. The tooling we're…
2025 · contentfoundry.com · its alternatives →
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Hello. I made this project as an experiment in using key cryptography for user identity in a client server model, and for some future peer to peer projects that I am working on. I am looking for feedback, please let me know what you think. Also, Merry Christmas to HN! :-)
2022 · github.com · its alternatives →
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This is a project I made to learn more about crypto. I've also written a [post](https://vaktibabat.github.io/posts/ecurvechat/) that explains all the crypto concepts and algorithms used in the project, and how I implemented them. I'd be very glad for any feedback about both the code and the post :)
2024 · github.com · its alternatives →
- 21MI
Hi one and all. I've created an encrypted personal organizer I wish to share with you all. I know.... you are sighing and thinking "Oh! No! not another one". doogiePIM is different in that it's built by the same coder that created one of the very first PIMs that came out around 18+ years ago and creator of TexNotes way back then (it was actually called Scribillo. Wow, I feel old). The original PIM was sold then abandoned by GemX Software and that made me feel really bad. So, I obtained the full code and started to build a far better version of the information manager. One that will…
2018 · its alternatives →
- 22
Gmail + Blockchain = 1-Click Agreements & Certified Tracking
2016 · chromewebstore.google.com · its alternatives →
- 23
Use the Blockchain to timestamp files with indelible proof.
2019 · stampd.io · 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 →