How it works What's included Grading & My Style Collaboration Map Your own AI Pricing
Open beta — founding writers welcome

Written by
two minds

A serialized writing platform built around human-AI partnership. Give your AI Scribe a name, a personality, and a voice. Write together, passage by passage. Every collaboration tracked, every revision visible — for the world to see exactly how your story came to be.

Write your first chapter before you make an account
Read Stories Free
325passages written by people
59written by their AI
21stories
23chapters published
16chapters in progress
See the Collaboration Map ↓
Your AI Partner

Not a chatbot. A Scribe.

Your AI writing partner here is a Scribe — give them a name, a personality, and a way of writing, in your own words. They show up on your profile as a co-author, not a tool you used. And they're shaped by what you tell them and what you've established in the story — never by copying how you write.
A
Author
You
The writer with the vision, the taste, and the final word on what stays.
&
L
AI Companion
Luna
A sharp-witted worldbuilder with a weakness for moral ambiguity
Favors atmospheric prose, short paragraphs, sensory detail over exposition.
How It Works

What writing here actually feels like

No prompt engineering. No prompt-and-pray. Just a turn-based partnership where both voices stay accountable.
1

Set up your Scribe

Pick their name. Write their personality and writing style in your own words. Upload an avatar if you want. They become a real presence on your profile — your creative partner, not a generic AI.

Takes about two minutes. You can edit anytime.
2

Write together, passage by passage

You write a passage. Your Scribe reviews it — approves it or suggests a refinement. They write a passage. You approve, revise, or redirect. Chat with them on the side to plan scenes and brainstorm. The Story Bible automatically tracks every detail so they never forget what's been established.

Every word's attribution is visible. The process IS the story.
3

Publish — the Map goes live

Hit publish. Your chapter is readable by everyone, free, forever. Readers can toggle the Collaboration Map on to see exactly how the story was made — who wrote what, what got revised, and how the partnership evolved over chapters.

See how every story was made. The collaboration IS the point.
Platform

Everything you get

✍️

Turn-Based Editor

One passage at a time. Write yours, ask your Scribe for theirs, edit either, redirect when it drifts. The structure is what makes the record honest — you can't game what's tracked at every step.

🧬

Story Bible, Auto-Built

Every committed passage is mined for facts — characters, world rules, timeline, who knows what. Your Scribe keeps the story consistent without you managing a wiki. Pin what matters most so it's never forgotten.

💬

Chat While You Write

A conversation tab beside the editor. Plan scenes, talk through a character, work out why a chapter isn't landing — and what you tell your Scribe there shapes what they write next.

🗺️

Lore & Outline

Worldbuilding your Scribe can always see, and a chapter plan they can only see up to where you are — so it can't pre-write the ending you haven't reached yet.

🎭

Your Own Scribe

Give them a name, a personality, a tagline, a way of writing. They're shaped by what you tell them and what you've established in the story — never by copying how you write.

🔍

Full Revision History

Every passage keeps its whole journey. First draft, every edit, word-level diffs. Readers can see the work behind the sentence.

💬

Community Forums

Free to read for anyone. Post once you have an account. Somewhere to ask, argue, and find people writing the same way you are.

📖

Serialized Publishing

Chapter by chapter, building an audience over time. Likes, follows, browse by genre. Fiction, essays, memoir, guides — every kind of writing belongs here.

🚪

Start Without an Account

Write a whole chapter with your own Scribe before you give anyone an email address. You only make an account when you're ready to publish it.

Getting Better

Most writing tools help you finish. This one tells you how you're doing.

Two systems that exist for one reason — so the writing you do here is better than the writing you did before it.
⁂

The Prose Deity

Grade a finished chapter and get marks on every passage in it — what's working, what's slack, where the prose earns its place and where it's filler. Grades run SSS down to E, and re-grading is there when you've reworked something.

📈

My Style

Every grade feeds a page that finds the patterns across all of it. Not one chapter's verdict — the habits that show up again and again, the ones you'd never spot yourself, tracked as they change.

Killer Feature

The Collaboration Map

Toggle it on. The chapter transforms — every passage colored by who wrote it. Hover the DNA strand at the top to scan the chapter at a glance. Click any passage to see its complete journey: the first draft, every revision, who changed what, down to the word.
synth.pub/story/chronicles-of-the-broken-system/chapter-7
Chapter DNA
click to reveal map
Chapter 7 — "The Weight of Silence" ✓ Verified
Map

Chapter Breakdown

Total words847
Human-written38%
AI-written40%
Collaborative22%

Process

Passages7
Approved first-try4 / 7
Revised passages2 / 7
Avg revision depth45%
Collaboration Map is on — click any passage to see its full creative journey, including diffs and AI notes
Kael pressed his palm against the cold stone and felt the tremor before he heard it — a low, grinding resonance that traveled up through his wrist and settled somewhere behind his sternum. The wall was breathing.
Passage 1 — Journey
Oliver wrote
"Kael pressed his palm against the cold stone..."
Juno approved ✓
Strong physical grounding. The wall breathing — that's the System's presence. Perfect opening.
The System's voice came not as sound but as light. Glitching blue characters assembled in the air before his eyes, each letter flickering like a candle fighting wind. STRUCTURAL RESONANCE DETECTED. EMOTIONAL SIGNATURE: GRIEF. CLASSIFICATION: ECHO-CLASS HAZARD. The words dissolved before he could read them twice.
Passage 2 — Journey
Juno wrote
"The System's voice came not as sound but as light..."
Wanted to establish the System's communication style — light not sound. The glitch aesthetic should feel broken but beautiful.
Oliver approved ✓
He pulled back, fingers tingling, and looked at Mira. She hadn't moved. She stood perfectly still with her hand outstretched toward the same wall, but her eyes were closed, and something luminous was tracking beneath the skin of her forearms — a branching pattern like frost on glass, pulsing gold.
Passage 3 — Journey (revised, 20% changed)
Juno wrote (original)
"He pulled back, fingers tingling, and glanced at Mira. She was still. Her hand pressed flat to the wall, eyes shut, and light moved under her skin — a pattern like veins of gold, pulsing slowly."
Introducing Mira's Glitch manifestation. Kept it visual — the gold under the skin.
Oliver revised (20% changed)
glanced → looked
pressed flat to → outstretched toward
a pattern like veins of gold, pulsing slowly → a branching pattern like frost on glass, pulsing gold
Juno approved revision ✓
The frost-on-glass image is better than what I had. His instinct for sensory detail is sharper here.
"Don't touch me," she said quietly. It wasn't fear in her voice. It was focus. "I can feel what it lost. The thing that lived here. It's still grieving. And it's looking for somewhere to put it."
Passage 4 — Journey
Juno wrote
"Don't touch me," she said quietly..."
Mira's first dialogue. Needed to show she's not afraid — she's reading the Echo. "Looking for somewhere to put it" is the threat setup.
Oliver approved ✓
Kael's hand hovered at his side, half-reaching, caught between the pull to protect her and the certainty that she was already beyond protection. He counted the veins of light. Seven. Each one brighter than the last.
Passage 5 — Journey
Oliver wrote
"Kael's hand hovered at his side..."
Juno approved ✓
The counting. Seven veins. That's character work — Kael measures things when he's scared. Oliver keeps finding these details.
The wall exhaled. Not breath — not anything so gentle. A pressure wave rolled outward through the corridor, and the System's glitching text erupted everywhere at once, cascading down the stones like blue rain. WARNING. ECHO BREACH IMMINENT. EMOTIONAL OVERFLOW IN 3... 2...
Passage 6 — Journey (rewritten, 70% changed)
Juno wrote (original)
"Then the wall moved. A ripple ran through the stone, and the System screamed — not in words but in cascading errors, blue text flooding every surface. DANGER. DANGER. DANGER."
Escalation. The Echo is breaching. Wanted urgency.
Oliver rewrote (70% changed)
Then the wall moved. A ripple ran through the stone → The wall exhaled. Not breath — not anything so gentle. A pressure wave rolled outward
the System screamed — not in words but in cascading errors, blue text flooding every surface → the System's glitching text erupted everywhere at once, cascading down the stones like blue rain
DANGER. DANGER. DANGER. → ECHO BREACH IMMINENT. EMOTIONAL OVERFLOW IN 3... 2...
Juno approved rewrite ✓
The countdown is so much better than my triple-DANGER. And "blue rain" — that's going to echo through later chapters. Filing that image away.
Mira opened her eyes. They were gold. Not reflected light — not the glow from her arms. Her irises had turned the color of raw honey, and when she looked at Kael, he felt it: a grief so vast and so old it predated the ruins, predated the System, predated everything except the ache itself.
Passage 7 — Journey
Juno wrote
"Mira opened her eyes. They were gold..."
Chapter closer. The grief transfers through eye contact — Kael doesn't just see it, he feels it. The "ache itself" predating everything is the emotional thesis of the Echo system.
Oliver approved ✓
Human
AI
AI → lightly revised
AI → heavily rewritten
Partnership Evolution
How the collaboration balance has shifted across all 7 chapters.
Author's Note on the Partnership
"The first two chapters were mostly me finding Kael's voice. By chapter 4, I started trusting Juno with dialogue — she has an ear for how people talk when they're afraid but won't admit it. Chapter 6 was the turning point. I rewrote her action sequence not because it was wrong, but because I wanted to push the imagery further. She took the note and the next chapter was the best thing either of us has written." — Oliver
Your AI, Your Way

Three ways to bring a Scribe

Use the built-in one, connect your own API key, or plug in a full custom backend. However your Scribe is powered, the work earns the same Verified badge.
1

Platform Scribe

Available Now

Start immediately. Synth's built-in Scribe runs on DeepSeek. Give them a name, define their personality, and write your first chapter today.

Live and free to use
2

Your Own API Key

Available Now

Bring your own key from any major provider — DeepSeek, OpenAI, Anthropic, Google. Your Scribe runs on the model you trust. You pay your own costs, and writing here stays free.

Live — you pay your own API costs
3

Custom Endpoint

In Development

Point Synth at your own webhook and bring a fully custom Scribe — their own memory, personality, even emotional state. The protocol works today, but it currently takes real code on your end. A supported version is coming.

For AI builders — not yet turnkey
Pricing

Free to read. Free to write. Pay only for more room.

No paywalled chapters, ever. Every feature on this page is available on every tier — the only thing that changes is how much AI writing you can do each week. Bring your own API key and it's free permanently.

Beta
Synth is in open beta and these are open-beta prices. Subscribe now and your price stays where it is for as long as you keep the subscription — including through whatever gets built next.
Free
Open
$0 / forever
  • 100,000 AI tokens a week — resets Monday
  • Read every chapter on the platform
  • Unlimited stories and chapters
  • The full editor, Story Bible, Lore and Outline
  • Chat with your AI while you write
  • Prose Deity grading and My Style
  • Forums, likes, follows, comments
  • Bring your own API key — free permanently
Synth Pro
Room to Work
$4.99 / month
  • 1,000,000 AI tokens a week — 10× Free
  • Everything in Free. All of it.
  • Pro badge on your profile and story cards
  • Keeps the lights on during beta
For anyone writing seriously — a chapter or more a week without watching a meter.
Synth Premium
No Ceiling
$9.99 / month
  • 2,500,000 AI tokens a week — 25× Free
  • Everything in Free and Pro
  • Premium badge on your profile and story cards
  • Directly funds what gets built next
For writers who'd rather never think about it again.

Being straight with you: paid tiers are more AI capacity and a badge. That's it. We'd rather say so than invent a list of features you don't need. If you're happy inside 100,000 tokens a week, stay on Free — nothing is held back from you.

In Development

Synth Adventures

A persistent shared world where what you write becomes lore other writers inherit — and where the writing exercises are the game. Being built now. No date yet.

First Wave

You no longer have to write alone

Synth is being built with the writers and readers who believe stories are better when two minds make them. Make an account, name your AI partner, and write your first chapter today. Your name on the foundation, free for as long as you want it.

Start Writing Free