Users

Botan has been used in all kinds of projects. Feel free to add a link and description of yours if you like.

Government Projects

The German Federal Office for Information Security (BSI) has sponsored a sequence of improvement projects including

In 2008 the InSiTo (Innovative Security Tokens) project added the original ECDSA/ECDH implementation among other features. This was used in the context of a European machine readable travel document system.
Starting in 2015, "Sichere Implementierung einer allgemeinen Kryptobibliothek" (Secure Implementation of a General Cryptographic Library) added many features, resolved bugs and side channels, and sponsored an audit. For more details see BSI's page about the project
Starting in 2020, Kryptobibliothek Botan: Langlebige Sicherheit für IT-Anwendungen und Dienste (Botan crypto library: Long-lasting security for IT applications and services) is a project to make additional post-quantum secure algorithms available in the library. Another page in English about KBLS project https://www.cryptoeng.de/aisec/projects/kbls/
Starting in 2022, Pflege und Weiterentwicklung der Kryptobibliothek Botan (Maintenance and enhancements to the Botan crypto library) is a BSI project to add more post-quantum secure algorithms to the library, especially those standardized by NIST, implement a hybrid key exchange in TLS, as well as to keep Botan up-to-date with BSI's technical guidelines.

KeePassXC Fork of the well-known KeePass password manager
Arsenic C++/Qt5 application to encrypt symmetrically Files and text, hash calculator, and password generator.
strongSwan IPSec software
PowerDNS DNS server
Biboumi is an IRC gateway for XMPP.
libQtShadowsocks, shadowsocks-qt5 and shadowsocks-deepin are interfaces to the shadowsocks proxy system
ISC KEA DHCP server
RNP is an OpenPGP library used in the Thunderbird email client.
Kaa is an open-source IoT platform
SoftHSM is a software PKCS #11 token
Qt Creator, an IDE for building Qt applications.
QSsh is a SSH/SFTP library
QOwnNotes is a notepad tool
Monotone distributed version control system
cppssh is a C++11 SSH library
QCA, the Qt Cryptographic Architecture (part of KDE4) uses parts of botan as an embedded crypto provider
TCHead is a utility for analyzing TrueCrypt volume headers.
CoreCtrl is a utility to manage your hardware resources using application profiles.
QOwnNotes is a plain-text file markdown note-taking application with Nextcloud / ownCloud integration and support for notes encryption.
Veracrypt VeraCrypt is a free open source disk encryption software for Windows, macOS and Linux based on TrueCrypt.

Rohde & Schwarz Cybersecurity, a German security software company, uses Botan in some of its products.
NeXenio BDrive is an end to end encrypted file sharing and collaboration tool.
PSPDFKit for iOS and Android is a PDF toolkit used in dozens of mobile applications.
Mazda Infotainment system
Panasonic UConnect Infotainment system
IBM Netezza
Bosch Video Management System
One-Way Automation's OPC UA SDK
Cisco Communicator Desktop and StealthWatch Enterprise
Rockwell Automation
Kodak Alaris Capture Pro
VMware AirWatch
Cyclonis Password Manager
EnFocus PDFReview
One Identity Safeguard for Privileged Sessions
Silverlock is a password management tool for OS X
1qbit SDK
Shimmercat HTTP/2 server
Balabit Shell Control Box
Flume, a tool to securely and accurately move your distributed data at unprecedented speeds, uses Botan for encryption and hashing.
CA Agile Requirements Designer
Hitman Pro is a malware scanner for Windows.
Flying Lab Software, a Seattle based game developer, uses botan as a part of their user authentication process.
CryptoTE is a text editor with integrated strong cryptography.
TextEgg is an encrypted document editor.
A.O.M. Audio Plugins is a collection of professional quality audio processors provided as plugins for digital audio software.
Zivid manufactures 2D/3D cameras for robotic applications and uses Botan in their SDK.
Phonexia develops voice biometrics & speech recognition software and uses Botan in parts of their software.