Work · alternatives · 2026

24 alternatives to Semaphor 2.0

Messaging secured by end-to-end encryption

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Semaphor 2.0 launched in 2018; newer entries below may have overtaken it.

1
Semaphor by SpiderOak▲10
A new secure workplace collaboration tool for teams
2016 · spideroak.com · its alternatives →
2
Keybase for Mobile▲159
End-to-end encryption messaging platform
2017 · keybase.io · its alternatives →
3
Crypho▲84
End-to-end-encrypted messaging and file sharing
2016 · crypho.com · its alternatives →
4
Threema▲79
The messenger that puts security and privacy first
2019 · threema.com · its alternatives →
5
Keybase Chat▲253
End-to-end encrypted chat built into Keybase
2017 · keybase.io · its alternatives →
6
Just Mail▲64
Secured email platform based on distributed storage network
2014 · its alternatives →
7
A decentralized social network with end-to-end encryption▲167
2016 · github.com · its alternatives →
8
SudoApp▲127
The 100% private, unlimited messaging and calling app.
2016 · anonyome.com · its alternatives →
9
blockslack.io▲78
Chat for small teams — encrypted and decentralized
2019 · blockslack.io · its alternatives →
10
Crypton.sh - SMS▲85
Secure Anonymous SMS in the cloud (and a phone number)
2018 · crypton.sh · its alternatives →
11
Cyphr▲4
Secure messaging made easy - encrypted, private & 100% yours
2015 · goldenfrog.com · its alternatives →
12
Encryptochat▲68
True end-to-end encrypted messaging.
2020 · play.google.com · its alternatives →
13
The Blik▲69
Secure messaging with non-shareable contact
2019 · apps.apple.com · its alternatives →
14
Stealthy▲94
Messaging with blockchain identity and user controlled data
2018 · stealthy.im · its alternatives →
15
Bitwarden Send▲79
Easily transmit text or files fully encrypted
2021 · bitwarden.com · its alternatives →
16
ADAMANT Messenger▲79
Decentralized anonymous blockchain messenger. Crypto In-Chat
2020 · adamant.im · its alternatives →
17
An Elliptic Curve-Based Secure Chat, Written Using Rust and Protobuf▲66
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 →
18
Kloak, A secret manager that keeps K8s workload away from secrets▲63
Kloak - Kubernetes eBPF Secret Interceptor for HTTPS. Secure secret management without application changes or sidecars.
Apr 2026 · getkloak.io · its alternatives →
19
Cyph – Encrypted chat in 30 seconds▲39
Cyph is the most powerful & easiest to use encryption software available. Open source, audited, trusted. Secure your chats, video calls, files, and more.
2014 · cyph.com · its alternatives →
20
WhatsApp end-to-end encryption▲33
Cross platform end-to-end encryption for 1:1 & group chat 🔒
2016 · blog.whatsapp.com · its alternatives →
21
Threema▲7
End-to-end encrypted messaging
2015 · threema.com · its alternatives →
22
Keybase Teams▲14
A fully encrypted Slack-like communications tool
2017 · keybase.io · its alternatives →
23
SendOtherSocials▲7
Share encrypted messages & files privately
2025 · play.google.com · its alternatives →
24
OctaChat▲8
Secure Messaging Platform
2025 · octapull.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 →