Whisperstream vs Emailyst

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

Whisperstream compared with Emailyst
Detail	Whisperstream	Emailyst
What it does	On-device dictation for Windows with no cloud transcription	Clean up Apple Mail on your Mac using built-in AI, nothing uploaded
Stage	Not given	Not given
Founded	Not given	Not given
Based in	CA	Not given
Pricing model	Not given	Freemium
Pricing	$29 for 1 device, $49 for up to 2 devices. One-time payment, no subscription.	Free: up to 1,000 emails per mail account with full message grouping and review. Full version: $29 once, covering up to three Macs and all version 1 updates, with no email limit and automatic sorting on a schedule.
Key features	On-device speech recognition using NVIDIA Parakeet model Text delivery to compatible applications via clipboard or simulated keystrokes Searchable transcript history with audio replay and encryption Import and transcribe audio files locally Support for 39 languages including English, Spanish, French, German, Chinese, and Japanese Optional AI cleanup to remove filler words and fix grammar Custom dictionary for names, technical terms, and acronyms Works entirely on CPU without requiring GPU for core transcription	Groups emails by type: newsletters, promotions, notifications and other categories Local processing with no uploads using macOS built-in AI Reversible email moves with full history Works with Gmail, Outlook, iCloud and Fastmail Automatic scheduled sorting in full version Custom rules available Can process multiple mailboxes Learns from user preferences Supports up to three Macs with one licence
What makes it different	Works offline after initial setup with no internet connection needed for core transcription Broad app compatibility without requiring add-ins or plugins Runs on CPU with no GPU required for speech recognition	Runs entirely on your Mac with no email uploads to servers Never deletes emails, only moves them with reversible operations Uses macOS native language model, signed and notarized by Apple Free version with no account required
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	17 +1 (up) since last check	3 +2 (up) since last check
Trust Flow (Majestic)	17	14
Citation Flow (Majestic)	29	14
Referring domains (Majestic)	78	3

4 details filled in for both companies.

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