What byline is

byline is brand memory for creators. It reads everything you've published, learns how you actually write, and serves that to the AI tools you already work in.

It turns the whole pile, your published work plus the private notes and drafts you send its way, into one living profile of how you write: your voice, your recurring themes, your audience, and the formats that land for you. Then it makes that profile available to the AI tools you already use, so every draft starts from you instead of from nobody.

What it reads

• Your Instagram posts and reels
• Your website or blog
• Your YouTube videos
• Anything you forward to your own private byline address

For Instagram and YouTube it also reads the comments and engagement around your work, so it learns not just what you said but what actually landed.

The promise in one line

Your voice, in every AI tool.

Connect one channel, and the next thing you write in Claude, ChatGPT, or Cursor is unmistakably yours. No more pasting the same style notes into every new chat. You set it up once, and every tool draws on the same memory of how you sound.

Grounded, not guessed

A pasted style prompt is a guess you maintain by hand. byline doesn't guess. It builds your profile from the posts you have genuinely published, and it shows its receipts: every claim about your voice points back to the work it came from. The same holds for the ideas it suggests. Each one is grounded in the real comments and the real numbers behind your posts, never invented, and the evidence is always one click away. If a read doesn't ring true, you can see exactly where it came from and steer byline away from it.

Who it's for

byline is for people who write for a living: solo founders, creators, ghostwriters, anyone whose voice is the product. If you keep re-teaching your tools how you sound, byline is the thing that remembers for you. You don't need to know anything technical. If you can add an integration to an app, you can use byline.

Where to start

Three small steps, in order:

1. Connect one dense channel: your Instagram, your newsletter, your site, or your YouTube. One source is enough to begin.
2. Glance at your voice card to see what byline learned about you.
3. Point your AI tools at byline. In any tool's Connectors or integrations settings, paste your byline connection link, sign in once with your byline account, and you're done.

Your byline connection link:

https://byline.fyi/api/mcp

From then on, just ask in plain language. "Write this in my voice." "What have I already said about pricing?" byline does the rest.

The trial is free for 14 days, with no card to start.