Alternatives

Products that do what Zendo does

Secure Mobile Messenger using OTP Encryption (iOS/Android)

1
Keybase for Mobile▲159
End-to-end encryption messaging platform
2017
2
Chadder▲89
Encrypted messaging app
2015
3
Rolo Secure Chat▲92
Secure chat app built with BlackBerry end-to-end encryption
2021
4
ZenGo▲103
The smoothest way to safely store your crypto
2019
5CM
Cipher – Mobile Ethereum Web3 DApp Browser▲76
2018 · cipherbrowser.com
6
Slack for Mobile 2.0▲310
Rebuilt from the ground up
2015
7
Crypton.sh - SMS▲85
Secure Anonymous SMS in the cloud (and a phone number)
2018
8
Telegram Messenger▲179
Whatsapp-esque messaging app but open, cloudbased, encrypted
2014
9
Threema▲79
The messenger that puts security and privacy first
2019
10
SecureDB▲83
Encryption as a service for mobile, web and IoT applications
2015
11
Stealthy: Secret Messenger▲87
Chat anonymously with friends & strangers
2015
12
ADAMANT Messenger▲79
Decentralized anonymous blockchain messenger. Crypto In-Chat
2020
13CI
ChatSecure iOS v4.0 – OMEMO and Signal Protocol▲107
2017 · chatsecure.org
14ZE
ZuccNet – Encrypted Facebook Messaging▲76
2021 · github.com
15DI
Darkwire.io – instant encrypted web chat (Socket.io and Web Crypto API)▲118
2017 · darkwire.io
16
Teletype for iMessage▲94
Retro telegrams delivered by iMessage
2017
17
Keybase for Chrome▲174
A secure chat button for every profile
2017
18OD
Opensource Desktop Implementation of the Threema Crypto Messenger▲39
2016 · github.com
19
Stickytape▲90
Encrypted video messaging for friends and family.
2021
20SO
Solo, open source FIDO2 security key▲98
2018 · github.com
21
SoloKeys▲139
Secure login made open and easy 🔒
2018
22
Cloak It - Secret Messages▲103
Keep your text messages secure with Touch ID authentication
2016
23
yaps[dot]chat redesigned▲100
One-time end-to-end encrypted anonymous chats
2025
24
PocketSuite▲112
Business messenger for the service economy
2017

Ranked by how close each launch is in meaning, then by votes. Refine with a description →