Strut

The AI writing workspace where rough notes become long-form work.

AI Writing & Content Writing & Documents Note-Taking strut.so

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Founded

N/A

Starting Price

About Strut

Strut is an AI-powered workspace and notebook for essays, articles, reports, and manuscripts. It keeps rough notes, imported sources, outlines, versioned drafts, and reviewer comments in one project, and its AI runs bounded operations (expand, outline, strengthen, critique, rewrite) on a selected passage with your notes and sources as context. The workspace is free; Pro adds unlimited projects and a monthly AI token allowance.

Pros & Cons

Pros

Keeps notes, sources, outline, drafts, and reviewer feedback in one project instead of spread across separate apps
AI works on a selected passage with a named operation and shows a diff before anything changes, so you stay in control of the text
Automatic version snapshot before every AI replacement, plus compare-any-two-versions history
Source Q&A answers with page citations, useful for research-heavy essays and reports
Generous free tier: the full editor, collaboration, and exports stay free, and local features keep working after AI tokens run out
Low Pro price at $9.99/month or $69.99/year

Cons

Free plan is limited to one project with three documents
Google sign-in is the only way to create or access an account
Very few independent user reviews so far, and limited third-party integrations
Pro trial requires a credit card
More machinery than you need for short-form content like social posts or quick emails

Key Features

Writer's notebook

Capture rough notes, quotations, voice notes, and source clips, and keep each fragment one click from the manuscript it may join.

Passage-scoped AI operations

Run expand, outline, strengthen, summarize, critique, tone, plot, and rewrite on a selected passage, using your notes, sources, and outline as context.

Diff preview and auto-versioning

Every AI replacement is shown as a word-level diff, and a version snapshot is saved automatically before any change is applied.

Long-form editor

Draft with live outline navigation, word goals, focus and typewriter modes, find and replace, read-aloud, and in-browser style statistics.

Research notebook

Import PDF, Word, Excel, CSV, Markdown, and text sources, run OCR on scanned pages, and ask questions answered with page citations.

Voice Profile

Analyzes your writing so AI revisions across a whole manuscript stay in your own voice.

Reviewers and inline comments

Invite editors and reviewers to a project, collect inline comments with resolve, and share frozen snapshots of a draft.

Editorial report

A structural read of an entire manuscript, plus title suggestions and expand-to-target-length operations.

Audio notes and narration

Transcribe voice notes straight into a project and generate audio narration of a passage.

Templates and exports

Start from essay, chapter, article pitch, or research memo templates, and export drafts in multiple formats including Markdown.

Pricing

Free

$0/forever

1 project with up to 3 documents
Unlimited notes and version history
2,000 AI tokens a day, up to 80,000 total
All 8 AI writing operations, Voice Profile, transcription, AI images
Import PDF, Word, Excel, CSV, Markdown, and text sources
Invite reviewers with inline comments
Version snapshots, Markdown export, and workspace search

Pro

$9.99/month

$69.99/year billed annually (save 42%)
7-day free trial (card required)
Unlimited projects and documents
1,000,000 AI tokens every month
All 8 writing operations: expand, outline, strengthen, summarize, critique, tone, plot, rewrite
Voice Profile, audio note transcription, AI images for chapters and covers
Priority access to new workspace features