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Mailbox MCP vs Simple Phones

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 Simple Phones
DetailMailbox MCP logo Mailbox MCPSimple Phones logo Simple Phones
What it doesConnect Claude, ChatGPT or any AI to your email mailbox AI phone agent to answer customer calls
StageEstablished Not given
Founded2002 Not given
Based inGB Not given
Pricing modelFreemium Free trial
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. Plans start at $97/mo for 100 calls/mo with no commitment.
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
  • Inbound call handling with customized AI voice agent
  • Outbound calling for customer follow-up and cold calls
  • Call logging with transcripts and duration records
  • Call routing and escalation
  • Multiple languages and accents
  • Website and FAQ document integration
  • CRM and Zapier integration
  • Chat-based agent testing
  • Webhook and email alerts
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
  • Continuous improvement over time based on interaction logs
  • No setup or development costs included in plan
  • Free ongoing customizations
  • Handles complex inquiries with custom integrations
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 check38 −1 (down) since last check
Trust Flow (Majestic)3419
Citation Flow (Majestic)3236
Referring domains (Majestic)61511

5 details filled in for both companies.

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