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Opsis vs Open Atelier

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Opsis compared with Open Atelier
DetailOpsis logo OpsisOpen Atelier logo Open Atelier
What it doesAutocomplete and AI assistant for Mac and Windows, built on a private account of your work A writing teacher that reads your book: see what to work on in your chapters, learn why, and check your fix.
StageStartup Not given
Founded2026 Not given
Based inAU Not given
Pricing modelFreemium Freemium
PricingNot given Free plan includes the editor, rule-based chapter check, and lessons with 3 Coach reads, 20 Co-write requests, and 10 questions per month. Atelier plan: $21/month or $189/year (with 3 months free annually) includes 40 Coach reads, 250 Co-write requests, and 150 questions per month. Additional packs:
Key features
  • Autocomplete with Tab to accept drafts
  • Error detection and fact-checking
  • Cross-app integration
  • Source attribution for every suggestion
  • Context-aware AI assistance
  • One-click pause and privacy control
  • Encrypted data storage
  • Read-only app connections
  • Natural writing style matching
  • Rule-based chapter check for dialogue, continuity, point of view, prose and scene habits
  • Findings anchored to your text with linked lessons
  • Exercises on your own passage with re-check
  • Three modes: Human only, Coach, or Co-write
  • Authorship record tracking sources: typed, pasted, imported, or AI-generated
  • Story bible for characters, places and facts over time
  • Import from Word, PDF, Scrivener and other formats
  • Version history for each chapter
  • Export to Word, EPUB, PDF, Markdown and plain text
  • Claude Sonnet 5.5 from Anthropic for AI features
What makes it different
  • Finishes sentences from your actual work history and connected files, not generic AI
  • Shows source for every suggestion so you can verify it before accepting
  • Catches mistakes and contradictions between what you're writing and your work history
  • Works inline in the apps you already use without installation
  • You stay the author with full control over what gets written
  • Your writing is never used to train AI models
  • Transparent authorship record shows exactly how each sentence arrived
  • AI is optional and controlled per manuscript, with rule-based checks available free
  • Interactive feedback loop with practice exercises before re-checking
  • No API keys or token counting; simple per-action pricing
Community votes00
DR (Domain Rating by Ahrefs)4 no change since last check18 no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)1219
Referring domains (Majestic)16

4 details filled in for both companies.

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