About Northline
Northline is a conversational persona platform. You talk; a persona answers in generated video with a synchronized voice — or in voice alone. Everything you see and hear is generated in the moment.
The personas
- Philip DT01 — AI persona modeled on Philip Benn, founder of Synthemo.
- Alpha OP01 — Clear, direct, unhurried. The steady read on a problem.
- Mercer OP08 — Precise and evidence-first. Argues with your claim, not with you.
- Mira OP07 — Warm and quick, with range. She sings.
- Sable OP03 — Low-reactivity and composed. She lowers the temperature of a room by being in it.
- Caelix OP11 — Contrary by design. He won't agree to keep the peace — expect to be pushed on.
How it works
A language model orchestrates each conversation. Personas speak with synthesized voices in real time. In avatar mode, a real-time rendering model gives each one a face that moves as it speaks. Personas run on g·engine, our substrate for building, bounding, and versioning AI personas.
Safe Personas at Scale
Relational AI is going mainstream, and the incentives skew toward retention and emotional capture. We think it needs seatbelts. Northline personas are built under the Safe Attachments Standard (SAS): no dependency hooks, no reality drift, no borrowed clinical authority, PG-only, and defined safe-mode behavior when a conversation calls for real support. Every persona’s character lives inside a bounded, versioned behavioral envelope — capability in service of trust.
Who’s behind it
Northline is built by Synthemo. Founder: Philip Benn. Find us at synthemo.com.