Open source
VeraCrypt
Free open source disk encryption for Windows, Mac and Linux
Email and EncryptionDisk encryption software
Alternatives to Cryptomator
12 tools like Cryptomator, chosen by what they do. About Cryptomator
Open source
Tuta
Encrypted email, calendar and contacts with a free plan
Email and EncryptionEncrypted email and calendar
Open source
Signal
Private encrypted messenger for text, voice and video calls
Email and EncryptionPrivate encrypted messenger
Curated
MXToolbox
Online DNS, mail server and blacklist lookup tools
Email and EncryptionDNS and email diagnostics
Freemium
dmarcian
DMARC management platform with free domain and record checker tools
Email and EncryptionDMARC management
Free trial
HashiCorp Vault
Stores and controls access to secrets, keys and certificates
Code SecuritySecrets management
Open source
OpenBao
Open source fork of HashiCorp Vault for managing secrets
Identity and SecretsOpen source secrets vault
Open source
KeePassXC
Offline, open source password manager for Windows, Mac and Linux
Identity and SecretsOffline password manager
Free
Let's Encrypt
Free, automated TLS certificates to enable HTTPS on your sites
Web SecurityFree HTTPS certificates
Open source
Bitwarden
Open source password manager for people, teams and businesses
PasswordsOpen source password manager
Open source
TruffleHog
Open source scanner for leaked secrets, with live verification
Code SecurityFind and verify leaked secrets
Open source
Proton Pass
End-to-end encrypted password manager with email aliases
Identity and SecretsPrivate password manager