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BuyBye vs Brainy

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

BuyBye compared with Brainy
DetailBuyBye logo BuyByeBrainy logo Brainy
What it doesA free shared shopping list app that works offline Autonomous Chief of Staff for engineering leads and founders. Lives in Telegram and Slack.
StageNot given Startup
FoundedNot given Not given
Based inNot given Not given
Pricing modelFreemium Freemium
PricingFree: $0 with up to 5 shopping lists, 5-recipe box, current week meal planning, up to 2 collaborators per list. Pro Individual: $1.99/month or $9.99/year with unlimited lists, recipes, collaborators, multi-week meal planning, item photos, and recurring templates. Pro Family: $14.99/year for up to 6 Starter: Free forever. Pro: $9/month. Chief: $35/month. Monthly billing, cancel anytime, no credit card to start.
Key features
  • Shared shopping lists with real-time sync across devices
  • Auto-categorize items into Produce, Dairy, Frozen and other categories
  • Voice input in seven languages
  • Import recipes with ingredients auto-added to shopping list
  • Meal planner with weekly and multi-week planning
  • Works completely offline with local device storage
  • No account required to start using the app
  • No ads on any pricing tier
  • Multilingual interface and auto-categorization
  • Item photos and custom category ordering in Pro
  • Text, voice, and photo capture in Slack and Telegram
  • Whisper-v3 voice transcription with 99.8% accuracy
  • Three-stage follow-up cadence: morning digest, nudge, and escalation
  • Bidirectional sync with Obsidian, Notion, and Markdown vaults
  • Meeting CoS that joins calls and converts notes to tasks
  • Brain scans across Notion, Obsidian, and Google Sheets
  • Approval inbox for all proposed vault writes
  • Brain Health score tracking open loop hygiene and clarity
  • Deduplication of repeating commitments across threads
What makes it different
  • Works offline-first with automatic syncing when network returns
  • No account or sign-up required to start shopping
  • Completely free with no ads across all tiers
  • Real-time list sharing that syncs even when offline
  • Automatically organizes items by category while you type or speak
  • Does not train its own AI model on user tasks
  • Approval-based vault sync prevents silent data overwrites
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 checkNot checked yet no change since last check
Trust Flow (Majestic)150
Citation Flow (Majestic)170
Referring domains (Majestic)390

5 details filled in for both companies.

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