Alternatives

Products that do what SMP — Secure Message Plugin does

Securely share secrets online, automatically.

1
Sealit▲511
Simple data security to get compliant & stay productive
2023
2LP
Local Privacy Firewall-blocks PII and secrets before ChatGPT sees them▲111
OP here. I built this because I recently caught myself almost pasting a block of logs containing AWS keys into Claude. The Problem: I need the reasoning capabilities of cloud models (GPT/Claude/Gemini), but I can't trust myself not to accidentally leak PII or secrets. The Solution: A Chrome extension that acts as a local middleware. It intercepts the prompt and runs a local BERT model (via a Python FastAPI backend) to scrub names, emails, and keys before the request leaves the browser. A few notes up front (to set expectations clearly): Everything runs 100% locally. Regex detection…
Dec 2025 · github.com
3
Secret▲173
Send a message through a safe, private, and encrypted link
2017
4
Hush▲94
Share secrets safely in Slack
2020
5
Secret Scribble▲103
Secure your passwords with an, open-source password manager
2024
6
Enigma X▲171
Your own encryption in any messenger
2025
7
Keybase Chat▲253
End-to-end encrypted chat built into Keybase
2017
8
Secpix▲97
Create photos with secret messages
2019
9
Duckist▲146
Share secrets, passwords or files in a safe and easy way
2023
10
Doppler Share▲161
Share one-off secrets with end-to-end encryption 🤫
2021
11
1Password Secrets Automation▲163
Secure, orchestrate, and manage infrastructure secrets
2021
12
Secure Send for Slack▲75
Send files securely without leaving your Slack channel!
2020
13
SafeNote 2.0▲102
Encrypt and send files and notes which self-destruct.
2019
14
Crypton.sh - SMS▲85
Secure Anonymous SMS in the cloud (and a phone number)
2018
15
Keychat▲108
Start a free secure chat with anyone without signing up
2020
16
sendsecure.ly▲80
Send secrets to anyone without leaving a digital footprint
2022
17
Password Crypt | Pcrypt.com▲101
Simple & secure password manager for teams & individuals
2018
18
DataSafe – Encrypted messages via hotkey▲86
A tiny app to quickly send encrypted messages with a hotkey
2025
19
MySecureNote▲80
Save some text and pictures to a public pin-protected URL
2022
20
Murmure for Gmail▲77
Send a private message to your BCC recipient 💬
2018
21
Laptop is the last place your secrets are still in plaintext▲55
Find the plaintext secrets on your Mac and move them behind Touch ID, injected just in time without breaking the tools that read them. Free and local-first. - jitpass/jit
21d ago · github.com
22
Cipherly▲15
Encrypt, disguise and hide messages — 100% offline
Jul 2026 · github.com
23SS
Subtle.sh – Zero-setup E2E encrypted messaging using OpenPGP and Soketi▲10
Hey HN, I've been playing around with OpenPGP.js and Soketi lately and decided to build a simple E2E encrypted messaging app. It's called subtle.sh. The idea is pretty straightforward: you need to send a secret to someone, but you don't want to use Slack, email, or any other plain text medium. subtle.sh generates a fresh session with ephemeral keys, you share the link, and once the tab is closed, everything disappears. Some key points: - Zero setup required (no accounts, no installation) - E2E encryption using OpenPGP.js - Real-time messaging with Soketi (an open-source Pusher alternative) -…
2024 · subtle.sh
24IP
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

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