Two walkies and a whole neighbourhood
Pablo and Marcos were brothers. Two years apart. And they had a pair of walkie-talkies their grandfather had given them for Christmas. Those devices changed their childhood.
Marcos would go to the corner of the park. Pablo would stay by the front door. And they would talk. No wires, no landline, without asking anyone’s permission. The signal went straight from one walkie to the other. It didn’t pass through any switchboard. Nobody recorded it. There was no bill at the end of the month. Just two kids talking through the air.
If Marcos turned off his walkie, Pablo was talking to himself. There was no voicemail, no answering machine. If both weren’t switched on at the same time, there was no conversation. That simple. And that perfect.
Thirty years later
Pablo lives in Madrid. Marcos in Lisbon. They see each other twice a year. They chat on messaging apps like everyone else. But lately something bothers Pablo. He doesn’t know exactly what. Maybe it was that ad for flights to Lisbon that appeared right after he talked to his brother about the next visit. Maybe it was reading that Meta uses messaging apps data to train its artificial intelligence. Maybe it was simply realising that every message he sends his brother passes through a server in another continent before reaching Lisbon.
“When we were kids,” Pablo thinks, “the signal went straight from my walkie to yours. Why does it have to go through Silicon Valley now?”
The same idea, thirty years later
Pablo discovers Solo2. And the first thing he thinks is: “This is a walkie-talkie.” Messages go straight from his phone to Marcos’s. They don’t pass through any server. Nobody stores them. No artificial intelligence analyses them. They go from one device to the other, like the radio signal that went from one walkie to the other in that park.
And there’s one thing that hasn’t changed in thirty years: both have to be connected. If Marcos doesn’t have Solo2 open, the message waits on Pablo’s phone. There’s no mailbox on any server. There’s no cloud to leave the message in. When Marcos comes online, the message will travel direct. But until then, it stays with Pablo. Just like when Marcos turned off his walkie and Pablo was talking to himself.
Is that a problem?
Think of it this way. When you call someone and they don’t answer, do you think the phone is broken? No. The other person simply isn’t available. When you arrange to meet someone to talk in person and they don’t show up, do you think talking in person “doesn’t work”? No. You simply didn’t coincide.
Solo2 works like this. It's live communication, like a call, like a face-to-face conversation, like a walkie-talkie. Both of you have to be there. And when you are, the message arrives instantly, encrypted from your device to the other person's.
In exchange for that small condition — that you are both connected — you gain something that no other messaging service can offer you: the mathematical certainty that no one else has seen your message along the way. Not a company, not a server, not an algorithm, not an artificial intelligence. Nobody. Only the person you sent it to.
Talking in person, but from a distance
Solo2 is a lot like speaking in person. Both of you have to be present. Your messages are not stored on any server. And only the two of you can read what is said.
The only difference is that you don’t need to be in the same room. Pablo is in Madrid. Marcos is in Lisbon. And when they both open Solo2, it’s as if they were sitting face to face. With no one listening behind the door.
What their grandfather already knew
Pablo and Marcos's grandfather knew nothing about cryptography. He didn't know what a P2P connection or end-to-end encryption was. But he knew that to talk in private, it's best for the signal to go directly from one to the other and for no one else to be able to listen.
That’s why he gave them walkie-talkies. And that’s why, thirty years later, Pablo and Marcos use Solo2.
Because some ideas can’t be improved. They can only be rediscovered.
Solo2 is direct communication between two people. Like a call, like a conversation in person, like a walkie-talkie. You both have to be there. And when you’re both there, no one else can listen.