Mailbox MCP vs Zemith

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 Zemith
Detail	Mailbox MCP	Zemith
What it does	Connect Claude, ChatGPT or any AI to your email mailbox	Every AI in one app
Stage	Established	Not given
Founded	2002	Not given
Based in	GB	Not given
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 plan with limited daily usage. Plus plan at $14.99/month (billed yearly at $179.88, approximately 1 month free). Professional plan at $24.99/month (billed yearly at $299.88, approximately 2 months free). Plus includes 1,500,000 credits monthly; Professional includes 3,000,000 credits monthly. O
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	Chat with multiple AI models including GPT, Claude, Gemini, Grok and DeepSeek in one interface Deep research with cited reports from multiple sources Generate finished documents, presentations and spreadsheets Background AI agents that run tasks on schedule Plugins for Notion, Linear, Canva and Airtable with approval controls Image and video generation with multiple models Live voice with camera and screen sharing Shared team workspaces and projects with memory Workflow editor to chain models and tools together Over 50 AI tools including notes, whiteboard, speech-to-text and study generators
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	Finished work output with documents, decks and spreadsheets ready to send Cloud agents continue working in the background after you close the app Switch between leading AI models mid-conversation to get multiple perspectives Integrates with apps you already use with approval before changes
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	47 +1 (up) since last check
Trust Flow (Majestic)	34	12
Citation Flow (Majestic)	32	26
Referring domains (Majestic)	61	837

5 details filled in for both companies.

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