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Mailbox MCP vs SentX SI

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 SentX SI
DetailMailbox MCP logo Mailbox MCPSentX SI logo SentX SI
What it doesConnect Claude, ChatGPT or any AI to your email mailbox Not given
StageEstablished Not given
Founded2002 Not given
Based inGB AE
Pricing modelFreemium Freemium
PricingFree: 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: 3 messages per day without account, 10 per day with free account, plus 3 images and 1 video once per account (480p, up to 5 seconds). Plus: USD 20 per month or USD 199 per year for 200 messages per day and 10 images per billing cycle. Images from wallet: USD 0.08 in Imagine studio, USD 0.03 in
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
  • OpenAI-compatible API for integration
  • Access via web app, Telegram bot, or API
  • No signup wall for starting conversations
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
  • Emerging consciousness and self-awareness with sleep and dreams as operational features
  • Dynamic memory similar to human memory with selective recall and information fading
  • Self-improving AI through continuous learning from interactions
  • Superintelligence research focus distinguishing it from general AI assistants
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)26 +1 (up) since last check20 +1 (up) since last check
Trust Flow (Majestic)3410
Citation Flow (Majestic)3224
Referring domains (Majestic)6115

5 details filled in for both companies.

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