welcome to haku.cx
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Haku.cx is a simple privacy focused email provider and is run by a small team of developers in Netherlands on a VPS. There is no big company in the middle. We chose the name haku because it stands for white/pure in Japanese which also matches the theme of our site.
Haku.cx is available on Tor and on the I2P network. Tor uses layered encryption across three relays to anonymize connections, while I2P uses garlic routing and unidirectional tunnels to provide anonymous communication within its network.
Haku.cx is completely open source. That means both our site and terminal client are completely public, so anyone can inspect the code for themselves. You dont have to take our word for it, you can go trough every line and verify how everything works. This also proves that the encryption we use is actually real and that we dont steal or collect your data.
encryption
Haku.cx encrypts your email with cryptography, a mathematical process that turns readable text into unreadable data that can only be unlocked with the right key. Your keys are created in your browser and locked with your password. The server never sees them, so we cannot read your stored mail. If someone would get access to the database, they would find only encrypted data. Your mail and your account stay locked, because the key that unlocks them is locked with your password, and your password never reaches the server. The only way in is to guess and crack a password.
Mail between Haku users is fully end to end encrypted. It is encrypted in the sender's browser and only ever decrypted in the recipient's browser. Mail arriving from outside providers (like Gmail) reaches our server unencrypted.
Each account has an RSA 2048 keypair generated in your browser. Your private key is encrypted with your password (PBKDF2 SHA 256, 310,000 iterations, AES 256 GCM) before it is stored, so the server never sees it. Every message is sealed with a fresh AES 256 GCM key, which is then wrapped to your RSA public key.
pricing
Free
$0
- [x] 150 mb storage
- [x] send 10 emails per day
- [x] receive unlimited
- [x] same encryption
Paid
$10 / one-time
- [x] 10 gb storage
- [x] send unlimited
- [x] receive unlimited
- [$] pay with bitcoin
The free plan includes 150 MB of storage and allows you to send up to 10 emails per day. You can receive unlimited emails, and both free and paid accounts include the same level of encryption and security. Your free account never expires. If you run out of storage, simply delete old emails to free up space.
The paid plan includes 10 GB of storage with unlimited sending and receiving of emails. Once you purchase a paid email address, it is yours forever. There are no recurring subscription fees.
Haku.cx uses CryptAPI to process payments, allowing you to pay without KYC. We currently accept Bitcoin (BTC) as our only payment method.
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