First Signal, now WhatsApp is rolling out usernames -- to protect against the privacy leak of identifying phone numbers (except the tiny detail of phone numbers leaking to them).
#deltachat does not require a phone number, and you can have multiple chat profiles, and fluidly change your transport servers as time goes by. By separating message transport operations from chat apps, #chatmail is designed to prevent any point of central control, and provide resiliency.
https://chatmail.at
Delta Chat
npub16z…v4ynp
2026-04-08 17:28:43 UTC
Author Public Key
npub16zxpwcght62n7q4j88uj6ynehdqfzk572rues3y2tshr0vehfwjq2v4ynpSeen on
wss://relay.ditto.pubPublished at
2026-04-08 17:28:43 UTCEvent JSON
{
"id": "e170beeed7312016e7675120ee5ddc0da8d55b437b2dd471d2749d9b9df3b5bd",
"pubkey": "d08c1761175e953f02b239f92d1279bb40915a9e50f998448a5c2e37b3374ba4",
"created_at": 1775669323,
"kind": 1,
"tags": [
[
"t",
"deltachat"
],
[
"t",
"chatmail"
],
[
"proxy",
"https://chaos.social/users/delta/statuses/116370264807283191",
"activitypub"
],
[
"client",
"Mostr",
"31990:6be38f8c63df7dbf84db7ec4a6e6fbbd8d19dca3b980efad18585c46f04b26f9:mostr",
"wss://relay.ditto.pub"
]
],
"content": "First Signal, now WhatsApp is rolling out usernames -- to protect against the privacy leak of identifying phone numbers (except the tiny detail of phone numbers leaking to them). \n\n#deltachat does not require a phone number, and you can have multiple chat profiles, and fluidly change your transport servers as time goes by. By separating message transport operations from chat apps, #chatmail is designed to prevent any point of central control, and provide resiliency. \n\nhttps://chatmail.at",
"sig": "3af9ba975eeb2b29d8738d854c2dad381b0311731e8dc082f47a8d2424ad5c25b94c64255a888f0eefab4a03d3097cf8c0812310f2d6de937541447c2d3c98a2"
}