Dev tools · alternatives · 2026

24 alternatives to Anonybox 21

AES-256 Encrypted Mailbox made in java

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Anonybox 21 launched in 2021; newer entries below may have overtaken it.

1
Anonybox▲3
Java AES-256 Encrypted Mailbox
2020 · github.com · its alternatives →
2
I made an open-source anonymous email forwarding service▲393
Create unlimited email aliases for free. Protect your real email from spam by using a different address for each service. Privacy friendly, anonymous replies.
2019 · anonaddy.com · its alternatives →
3DH
Diffie-Hellman exchange for the layman▲75
Privacy tool by Boris Reitman, a privacy activist.
2021 · borisreitman.com · its alternatives →
4
Securely Handle Encryption Keys in Go▲119
Software sandbox for storage of sensitive information in memory. - awnumar/memguard
2017 · github.com · its alternatives →
5
Atomic Mail Agentic▲268
Let your agents read, send, and react to email autonomously
Jun 2026 · atomicmail.ai · its alternatives →
6
hat.sh▲212
Free, fast, secure and serverless file encryption
2019 · hat.sh · its alternatives →
7
DataSafe – Encrypted messages via hotkey▲86
A tiny app to quickly send encrypted messages with a hotkey
2025 · its alternatives →
8IA
InstantCryptor – AES256 Encryption for Dropbox and Google Drive▲35
2015 · instantcryptor.com · its alternatives →
9
1SecMail▲112
Free disposable email that actually arrives in real time
2025 · tmaily.com · its alternatives →
10
I created a web app to encrypt/decrypt messages using Web Crypto API▲35
Send secret messages using Web Crypto API 🤫.
2024 · webcrypto-private-messages.vercel.app · its alternatives →
11
The Pitch - 41: Paubox—Email Encryption for Healthcare▲74
Hoala Greevy pitches his HIPAA compliant email service
2016 · thepitch.show · its alternatives →
12
A minimal web-based IMAP client for use on untrusted machines▲18
Access predefined IMAP mailboxes with a browser using one time passwords or a YubiKey - dividuum/one-time-mail
2016 · github.com · its alternatives →
13CI
CryptSend.io – Share encrypted files with randomly generated links▲74
2018 · cryptsend.io · its alternatives →
14
MemSafeCrypto, Java cryptography primitives using DirectByteBuffer▲49
A subset of BouncyCastle crypto primitives, refactored to use DirectByteBuffer. - andy-goryachev/MemSafeCrypto
2022 · github.com · its alternatives →
15SD
Self destructing, encrypted messaging with file upload▲40
2014 · popbox.io · its alternatives →
16AI
aes.io - secure storage/collaboration with client-side JS crypto▲10
2012 · aes.io · its alternatives →
17
Encryptochat▲68
True end-to-end encrypted messaging.
2020 · play.google.com · its alternatives →
18
GDH – Generalized Diffie-Hellman key exchange Java implementation▲8
Generalized Diffie-Hellman key exchange Java library built on top of the Vert.x framework - maxamel/GDH
2017 · github.com · its alternatives →
19
Byte Orbit Privacy Cannon▲6
This is a file, email, IM encryption app.
2020 · apps.microsoft.com · its alternatives →
20
GDH – Generalized Diffie-Hellman key exchange Java library▲8
Generalized Diffie-Hellman key exchange Java library built on top of the Vert.x framework - maxamel/GDH
2018 · github.com · its alternatives →
21
SecureChain (Beta)▲6
End to End encryption made simple.
2017 · its alternatives →
22SF
Safebox - for ur Dropbox▲16
2011 · safebox.fabulasolutions.com · its alternatives →
23
Forward Email – Open-Source Quantum Safe Encrypted Email Service▲35
Get free email forwarding for custom domains. Send & receive as [email protected] with unlimited aliases, 10GB storage, IMAP/POP3/SMTP & 100% open-source security. Trusted by 500K+ users. Setup in 2 minutes.
2023 · forwardemail.net · its alternatives →
24
Encrypto▲11
Secure any file with AES-256 encryption and a unique hint
2020 · macpaw.com · 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 →