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Postscriptum vs Halopen

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

Postscriptum compared with Halopen
DetailPostscriptum logo PostscriptumHalopen logo Halopen
What it doesA private AI journal that turns your daily reflections into a memoir Mac dictation that types exactly what you said
StageMVP Startup
FoundedNot given 2026
Based inNot given US
Pricing modelFree Free trial
Pricing$0 during open beta; paid plans to come later Free trial for 14 days, no card required. Then Pro Monthly at $19/month, Pro Annual at $179/year (saving $49 vs monthly), or Pro Lifetime at $499 one-time. Educational discount: 50% off Monthly or Annual with a .edu email address. Cancel anytime.
Key features
  • Nightly check-in with AI-generated questions
  • Adaptive second question based on previous entries
  • Unsealed entries that cannot be edited
  • AI memoir generation in literary prose
  • Weekly pattern digest
  • AI-generated insights about themes and patterns
  • Full archive with streaks and backstory
  • Hold-to-talk hotkey dictation in Mail, Slack, editors, terminal and browser
  • Verbatim transcription by default with optional cleanup settings per app
  • Live partial transcript caption visible while speaking
  • On-device speech processing on Apple Silicon after model download
  • Personal dictionary to bias transcription toward names and technical terms
  • Voice snippets—short trigger words that expand to full text before insertion
  • Lost-dictation recovery—transcripts and audio preserved if delivery fails
  • Long-form dictation up to 10 minutes per hold without word limits
  • Menu-bar native Swift app with no Dock icon or notification popups
  • Choice of cloud or local transcription with audit log of network activity
What makes it different
  • The second question intelligently adapts based on what you previously wrote
  • Entries are permanently sealed and cannot be edited
  • Automatically composes your journal into a literary memoir
  • Verbatim by default—leaves grammar and slang alone, unlike most AI dictation that automatically tidies speech
  • On-device recognition option on Apple Silicon keeps your speech processing entirely on your Mac
  • Transparent claims you can verify—signed, notarized, listed frameworks, and audit log visible in the app
  • Built by one maker as a native Swift app designed to feel natural with the keyboard
  • Works system-wide in your text fields without floating windows or interruptions
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check6 no change since last check
Trust Flow (Majestic)06
Citation Flow (Majestic)1221
Referring domains (Majestic)18

6 details filled in for both companies.

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