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fastwrite vs Sealis

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

fastwrite compared with Sealis
Detailfastwrite logo fastwriteSealis logo Sealis
What it doesAI writing assistant for academic papers integrated into Microsoft Word Your voice, kept yours, wherever AI writes or speaks for you
StageNot given Not given
FoundedNot given Not given
Based inDE AU
Pricing modelFreemium Freemium
PricingNot given Free: A$0/month with 10 rewrites per month and 1 voice. Pro: A$11.99/month with 150 rewrites per month (currently on waitlist). Studio: A$34.99/month for up to 5 clients, each with their own voice, 300 rewrites per month, and client approval pages.
Key features
  • Search over 20 million scientific papers using natural language queries
  • Upload and chat with PDFs up to 1,000 pages per document
  • AI-powered sentence and paragraph completion in Word with source citations
  • Deep Review evaluation against nine university grading criteria
  • Automatic APA 7 citation formatting
  • Cross-document PDF search within entire project library
  • Connector integration with Claude and ChatGPT
  • Own-sources-only mode restricting generation to personal documents
  • Available on macOS, Windows, and Web App
  • Rewrite drafts in your voice while keeping facts, numbers and dates unchanged
  • Measure drafts for stock phrases, rhythm, word choice and punctuation
  • Save and learn from your writing style with every correction
  • Studio: save a voice per client with approval pages
  • Free Score tool with no signup required
What makes it different
  • Integrated directly into Microsoft Word workflow without switching applications
  • Prevents plagiarism by automatically inserting citations and suggesting paraphrasing
  • Specifically optimized for academic writing using custom language models
  • Evaluates work against actual university grading criteria with specific improvement suggestions
  • All work remains private and never used for model training
  • Automatically flags when rewrites drop or add numbers, dates or names without user approval
  • Learns from your corrections to improve rewrites over time
  • Preserves formality level and register while removing template phrases
  • Works across text, audio and visual formats with consistent voice
  • Built on published research and test results
Community votes00
DR (Domain Rating by Ahrefs)15 +1 (up) since last check1 no change since last check
Trust Flow (Majestic)173
Citation Flow (Majestic)2720
Referring domains (Majestic)1536

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