Mailbox MCP vs Question Base

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 Question Base
Detail	Mailbox MCP	Question Base
What it does	Connect Claude, ChatGPT or any AI to your email mailbox	AI Answer Agent for Slack that answers repetitive questions from your team using your documentation
Stage	Established	Not given
Founded	2002	2022
Based in	GB	US
Pricing model	Freemium	Paid
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.	Proof of Concept: $1,000 for 2 months. Annual Pro: Starting at $6,000/year ($5/user/month paid annually). Enterprise+: Starting at $20,000/year ($15/user/month paid annually).
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	Instant answers from Slack with 3.2-second response time Integrations with Google Drive, Confluence, Notion, Salesforce and 10+ other platforms Answer verification and control by knowledge experts Duplicate detection and answer insights Performance dashboard tracking automation rate and question performance Escalation workflow to route unanswered questions to human experts Knowledge capture and FAQ creation from chat conversations Role permissions and access controls Customizable agent prompts and behavior settings
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	99.99% accuracy on verified answers with expert control Usage-based pricing without expensive per-seat licenses Continuous learning that improves automation rates over time Measurable ROI with 90% of repetitive questions auto-answered
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	49 +1 (up) since last check
Trust Flow (Majestic)	34	22
Citation Flow (Majestic)	32	37
Referring domains (Majestic)	61	362

7 details filled in for both companies.

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