— 5 onboarding screens, scroll through the flow —
Posthorn — Welcome
Step 1 of 5 · Welcome

Welcome to Posthorn.

Your day, announced before it arrives. Posthorn reads your email, calendar, messages, and chat — and surfaces the few things that actually need your attention.

One promise.

Your data never leaves your machine in unencrypted form. Memory, raw email, message contents — all stay on your Mac. We don't have servers that see them.

Setup takes about 10 minutes. Five short steps. We'll never ask you to remember anything you've already told us.

Posthorn — Mac permissions
Step 2 of 5 · Mac permissions

Three Mac permissions.

Posthorn reads iMessage + Apple Notes locally, and uses Messages to text you reminders. Click each button, then come back here.

📁
Full Disk Access
Needed to read recent iMessage history from your Mac. Read-only, local.
✓ Granted
📝
Automation → Notes
Read recently-modified Apple Notes for context (e.g., your meds list).
✓ Granted
💬
Automation → Messages
Send briefings to your self-thread (optional — only if you pick Messages as your channel).
Open Settings…
Posthorn — Choose your AI
Step 3 of 5 · AI provider

Where should the AI live?

Posthorn uses a large language model to compose your briefings and parse your replies. Pick where it runs.

Anthropic

Recommended
Claude Opus + Sonnet via your own API key. Best briefing quality. Data sent directly Mac→Anthropic.
~$0.30 – $1 / day

OpenAI

GPT-5 + GPT-5-mini via your own API key. Strong alternative if you already use OpenAI.
~$0.30 – $1 / day

Local (Ollama)

Free
Runs on your Mac. Free, fully private, slightly slower. Llama 3.1 8B by default (~5 GB).
$0

Posthorn-managed

Pro Plus
We provide the model. No API key needed. Bundled with Pro Plus subscription.
Included

You can change this later in Settings.

Posthorn — Connect accounts
Step 4 of 5 · Accounts

Connect what you use.

Each one opens a sign-in flow. You can add more or remove any later. Skip what doesn't apply.

sam@chen.email
Gmail + Calendar + Chat connected
sam@conduit.ai
Gmail + Calendar + Chat connected
+ Add another Google account
Multiple workspaces? Add them all.
Slack
Add the workspace(s) your team uses.
Telegram bot
@SamsPosthornBot — auto-created. You'll get briefings here.
Posthorn — Tell me about your life
Step 5 of 5 · Discovery

Quick intro to you.

I'll ask 5 or 6 questions. This becomes the memory I use to interpret everything else. Skip anything you don't want to answer — we can come back to it.

Who's in your daily life? Names, relationships — only people you'd reasonably expect to come up in your email, calendar, or messages.
My wife Aria, kids Theo (13) and Mira (11). Theo has chronic medical stuff. Co-founder Paul Singh at Conduit.
Got it. What are the top 2–3 things you're working on right now? One sentence each.
Lumen — AI orchestration platform under Conduit. Wildflower Tea Co. with Aria on the side. Some Sterling consulting work.
Last one for now: what's the failure mode you're trying to avoid? What's the bad day Posthorn should prevent?
Being late to things because I missed an email or didn't realize the time. And missing important medical stuff for Theo because I was heads-down on Lumen.
Captured. I'll come back to learn more as I see your real activity over the first week. Ready for your first briefing?