Mailbox MCP vs Ace

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

Mailbox MCP compared with Ace
Detail	Mailbox MCP	Ace
What it does	Connect Claude, ChatGPT or any AI to your email mailbox	Voice AI assistant that lives on your computer and phone to help with screen explanations, writing, notes and study tools
Stage	Established	Not given
Founded	2002	Not given
Based in	GB	US
Pricing model	Freemium	Freemium
Pricing	Free: 5 calls per mailbox per day, no card required. Pro: £34.99 per mailbox per year plus VAT (£2.92 monthly equivalent). Team Access: Team 3 at £119.99 per year plus VAT, Team 5 at £199.99 per year plus VAT, Team 10 at £399.99 per year plus VAT per account.	Free Play: 2,000 free credits with no card required. Pay as you go: $10 for 5,000 credits or $50 for 20,000 credits. Pocket Pair: $30/month for 10,000 credits monthly. Full House: $50/month for 30,000 credits monthly with $25 refill option for 10,000 credits. High Roller: $100/month for 60,000 credi
Key features	Read email without marking as read Read attachments: PDFs, spreadsheets, photos Reply in thread with proper headers Send as any of your email aliases Email routines on a schedule Permission levels per connection Works with Gmail, Outlook and IMAP	Screen understanding: explain visible questions and documents Writing assistance in apps you already use like Google Docs Cross-device synchronization: Mac, Windows, Linux, web and mobile Stealth mode for private work on your own machine Ace Mobile app for connecting iPhone to Mac
What makes it different	Leaves mailbox completely untouched—no duplicate sent items, no marked-as-read flags, threading preserved Works with any MCP-compatible AI—not limited to Claude or ChatGPT Attachments never encoded—up to 20 MB, four ways to attach without passing through AI Email routines run automatically on schedule without manual prompts	Voice-first interface: hold a key and speak naturally instead of typing Sees your screen when you ask: understands context from what's visible to help Works in apps you already use without switching context One account for computer, phone and web with shared credits
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)	26 +1 (up) since last check	50 +6 (up) since last check
Trust Flow (Majestic)	34	1
Citation Flow (Majestic)	32	42
Referring domains (Majestic)	61	49

6 details filled in for both companies.

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