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Heard vs Diffsift

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

Heard compared with Diffsift
DetailHeard logo HeardDiffsift logo Diffsift
What it doesThe voice layer for coding agents AI code review that runs locally on your machine
StageNot given Not given
FoundedNot given Not given
Based inUS GB
Pricing modelFreemium Paid
PricingFree: $0/month (open source with local voices). Pro: $12/month or $144/year (managed voices and spoken recaps). Power: $24/month or $288/year (adds voice input and iPhone companion). Every download includes a free 14-day Power trial with no card required. Personal: $59 (one-time). Team: $119 per seat (minimum 2 seats, one-time). Renewal: 50% of original price ($29 personal / $59 per team seat) for 12 months of updates.
Key features
  • Spoken updates from Claude Code and Codex
  • Three listening modes: Co-pilot, Companion and Focus
  • Spoken recaps of agent work
  • Voice dictation with right Command key
  • Hey Parrot voice assistant
  • iPhone companion app for listening and replying
  • Follow multiple agent sessions at once
  • Open source engine with local voices
  • Works with any terminal including iTerm2 and tmux
  • Up to 2M characters of narration daily on Power plan
  • Proactive review inbox with Windows notifications
  • Multi-pass review for large PRs
  • Evidence-linked findings
  • Review profiles for different focus areas
  • Review history stored locally
  • Supports local and external model providers
  • Azure DevOps and GitHub integration
  • Encrypted credential storage
  • Offline license activation
What makes it different
  • Works without watching your screen—lets you stay informed while focused on other tasks
  • All code and transcripts stay on your Mac; nothing is used to train models
  • Listen and respond to agents from your iPhone via companion app
  • Open source engine available under Apache 2.0 license
  • Supports multiple coding agents with one interface
  • No code leaves your machine by default with local models
  • One-time purchase with perpetual fallback license
  • First-class Azure DevOps support
  • No telemetry or vendor lock-in
  • Tested with real models at actual performance speeds
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)6 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)30
Citation Flow (Majestic)3014
Referring domains (Majestic)1012

6 details filled in for both companies.

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