NarrativAIOperaHouse Ventures
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TKMedium
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Related Products
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NarrativAI:
About
NarrativAI is built for writers with original characters, long-running universes, and casts too big to hold in their head. Two things make it different from a generic AI writing assistant.
The OC Vault is a continuity engine that builds itself passively as you write - reading your drafts and extracting facts about your characters, world, and timeline without you maintaining a separate document. When something you write contradicts an established fact, it catches the drift before it compounds across chapters.
Muse, the co-writer, never operates as a black box. It always shows which state it's in - Listening, Suggesting, or Drafting, so you always know exactly what it did to your universe and why. Two more states (Safety Checking and Resting) are on the way as the product progresses.
Currently we're offering a Founding Member offer for the first 100 people who join: lifetime Premium access, a 50,000 credit package, a permanent badge, and a rate that's locked in for good.
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TK:
About
TK is a cloud-based writing workspace from Medium for writers, journalers, and people developing ideas through writing. Its editor supports notes and drafts, with an inline @TK assistant for research, retrieving earlier writing, and editorial or headline feedback. Prompts and shared libraries help users develop ideas and exchange drafts for discussion. TK can turn notes and research into wiki-style knowledge bases linked to a writer’s accumulated material. Users can import Medium writing, Bear or Obsidian vaults, and Markdown files, then export notes or an archive as Markdown. Android and iOS apps and mobile widgets support voice or text capture; an MCP server and Claude skill let compatible AI agents access TK content. TK supports journaling, research, long-form drafting, feedback, and preparing work for publication on Medium. TK is cloud-hosted and has no native desktop app.
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NarrativAI:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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TK:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Supported
iPad
Not Supported
Android
Supported
Chromebook
Not Supported
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NarrativAI:
Audience
Individual creative writers (fan fiction, original fiction, worldbuilding) — not enterprise/team buyers.
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TK:
Audience
Writers, journalers, researchers, and people developing ideas through writing, including Medium authors.
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NarrativAI:
Support
Phone Support
Supported
24/7 Live Support
Supported
Online
Supported
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TK:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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NarrativAI:
API
Offers API
Not Supported
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TK:
API
Offers API
Supported
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NarrativAI:
Screenshots and VideosNo images available
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TK:
Screenshots and VideosNo images available
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NarrativAI:
Pricing
No information available.
Free Version
Supported
Free Trial
Supported
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TK:
Pricing
$0
The free tier includes unlimited notes, publishing, collaboration, and built-in agent and social features. TK Pro is $12/month for full access to the TK agent, skills, summaries, and MCP.
Free Version
Supported
Free Trial
Not Supported
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NarrativAI:
Reviews/
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TK:
Reviews/
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NarrativAI:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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TK:
Training
Documentation
Not Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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NarrativAI:
Company InformationOperaHouse Ventures
Founded: 2026
United States
narrativai.cc/
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TK:
Company InformationMedium
Founded: 2012
United States
tk.xyz/
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NarrativAI:
Alternatives |
TK:
AlternativesNo Alternatives
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NarrativAI:
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NarrativAI:
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NarrativAI:
Categories |
TK:
Categories |
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NarrativAI:
Integrations
Bear
Not Supported
Claude
Not Supported
Claude Code
Not Supported
Medium
Not Supported
Model Context Protocol (MCP)
Not Supported
Obsidian
Not Supported
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TK:
Integrations
Bear
Supported
Claude
Supported
Claude Code
Supported
Medium
Supported
Model Context Protocol (MCP)
Supported
Obsidian
Supported
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NarrativAI:
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TK:
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