Mailbox MCP vs Kipper

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 Kipper
Detail	Mailbox MCP	Kipper
What it does	Connect Claude, ChatGPT or any AI to your email mailbox	Ask finance questions in plain English and get real answers from your accounting system in seconds
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 14-day trial (100 questions). QuickBooks & Xero: $200/month (10 active users), $5/month per additional user. NetSuite: $1,000/month (20 active users), $25/month per additional user. All plans include 2,000 questions/month plus 50 per additional user. Overages: $0.05/question (QuickBooks/Xero),
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	Query accounting data in plain English Slack, Teams, SMS, and AI tool integrations Role-based access control Full audit trail of all queries Read-only architecture prevents data modification Real-time data from finance systems Multi-entity support Cash flow forecasting with AI Data encryption in transit and at rest
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	Strictly read-only architecture eliminates risk of data modification No login required for end users Live in under an hour with free onboarding Works with three major accounting platforms
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)	37 −1 (down) since last check	30 +2 (up) since last check
Trust Flow (Majestic)	34	24
Citation Flow (Majestic)	32	21
Referring domains (Majestic)	61	328

6 details filled in for both companies.

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