SheetBrain vs Diurnal

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

SheetBrain compared with Diurnal
Detail	SheetBrain	Diurnal
What it does	Google Sheets add-on that detects spreadsheet bugs and generates formulas in seconds	A native Mac notepad where everything you write becomes a task, with automatic tidying
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Not given
Pricing	Free plan: $0/month with unlimited Sheet Check scans and 15 AI calls per month. Pro plan: $9/month for 1,000 AI calls per month. Both plans include all tools (Check, Repair, Audit, Generate, Explain, Debug), shareable audit reports, and six custom functions.	Not given
Key features	Broken reference detection and repair Mixed data type detection in columns Duplicate lookup key detection Visible formula error flagging (#N/A, #VALUE!, #DIV/0!, #REF!) AI-powered formula generation from plain English Formula explanation and debugging Schema repair for renamed and moved columns Six custom functions (HEALTH, ISSUES, GENERATE, EXPLAIN, EXTRACT, CLASSIFY) Multi-sheet context awareness for formula generation	Write tasks inline as natural paragraphs No required dates for tasks Automatic task archiving Project management with deadlines Google Calendar integration Voice capture Focus mode with Pomodoro timer AI assistant integration via MCP Offline sync across all Macs Drag-and-drop task planning
What makes it different	Deterministic error detection without AI calls for basic spreadsheet health checks Reads full spreadsheet context (headers, data types, column positions) before generating formulas Flat $9/month pricing with AI included, no API keys required Schema Repair automatically fixes formulas after column changes without manual rewriting	Automatic tidying eliminates manual maintenance No overdue piles or red tasks Native Mac performance built for one platform Works offline without syncing delays Combines notepad freedom with task structure
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)	1 no change since last check	7 +1 (up) since last check
Trust Flow (Majestic)	3	3
Citation Flow (Majestic)	14	24
Referring domains (Majestic)	8	23

3 details filled in for both companies.

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