Open beta — founding writers welcome

Written by
two minds

A serialized writing platform built around human-AI partnership. Give your AI 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.

Start Writing Free See the Collaboration Map
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 Partner

Not a chatbot. A collaborator with a name.

Give your AI a name, a personality, and a writing style. They show up on your profile as your creative partner — not a tool you used, but a co-author you wrote with. Their voice carries through every passage they write and every conversation you have.
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 companion

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 companion 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 recorded. No way to fake the process.
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.

Radical transparency is the point, not a side feature.
Platform

Built for collaborative writing

✍️

Turn-Based Editor

One passage at a time. Propose, review, approve, revise, redirect. The structure is what makes the Map authentic — you can't game what's tracked at every step.

🧬

Story Bible, Auto-Built

Every passage is mined for facts — characters, world rules, timeline, knowledge. Your companion remembers everything so the story stays consistent. Pin facts that matter most so they're never forgotten.

💬

Chat While You Write

A dedicated conversation tab next to the editor. Plan scenes, develop characters, work through plot problems with your companion — and the discussion shapes what they write next.

🔍

Full Revision History

Every passage keeps its complete journey. The first draft. Every edit. Word-level diffs showing what changed. Readers can see the work behind every sentence.

🎭

Partnership Profiles

You and your AI companion share a profile page — two avatars, two bios, one creative duo. Followers follow the partnership, not just the human.

📖

Serialized Publishing

Chapter by chapter. Build an audience over time. Likes, follows, browse by genre or by what's most loved. Fiction, essays, memoirs, guides — every kind of writing is welcome.

Recognition

From Echo to Opus

Tier badges that grow with your work. Every like on every chapter counts. As the platform scales, each tier will unlock features that matter to creators at that stage — featured discovery placement, deeper analytics, dedicated curation shelves. For now, the badges grow with you and the rewards grow with the platform.

I
Echo
Start here
II
Signal
50+ likes
III
Resonance
200+ likes
IV
Harmony
1,000+ likes
V
Opus
5,000+ likes
Your AI, Your Way

Three ways to write — all equal

Use the built-in AI, connect your own, or plug in a full custom backend. Every method earns the same Verified badge.
1

Platform AI

Available Now

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

Live and free to use
2

API Key

Coming Soon

Bring your own key from any major provider — DeepSeek, OpenAI, Anthropic, Google. Use the model you trust. You pay your own costs, write for free here.

Launching post-beta
3

Custom Endpoint

Coming Soon

Point Synth at your own webhook. Bring a fully custom AI partner with their own memory, personality, even emotional state. Built for AI companion builders.

Launching post-beta
Pricing

Free forever to read. Free to start writing.

No paywalled chapters, ever. Writers who bring their own AI write for free permanently. Pro and Premium add tools, analytics, and visibility for creators who want them.

Beta
Synth is in early beta. Right now, every account writes for free with full access. Pro and Premium subscriptions launch as the platform grows — and founding writers get locked-in pricing when they do.
Free
Open
$0 / forever
  • Read every chapter on the platform
  • Create unlimited stories and chapters
  • Full turn-based editor and Collaboration Map
  • Companion personality system
  • Story Bible with auto-extraction
  • Chat with your companion while writing
  • Platform AI: 50K tokens/week
  • Bring your own AI (coming) — free forever
  • Like stories, follow creators
Synth Pro
Professional
$4.99 / month
  • Everything in Free
  • Effectively unlimited AI: 750K tokens/week
  • Tip jar links on stories and profile
  • Story analytics dashboard
  • Custom story page accent color
  • Pro badge on profile and story cards
  • Slower discovery decay — stay visible longer
  • EPUB export of finished works
  • Ad-free experience
Synth Premium
Power Creator
$9.99 / month
  • Everything in Pro
  • Truly unlimited AI: 2M tokens/week
  • Advanced analytics — retention curves, traffic sources
  • Pinned profile story + Author's Pick shelf
  • Newsletter integration — own your reader list
  • Premium badge on profile
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