Mailbox MCP vs SetterApp

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 SetterApp
Detail	Mailbox MCP	SetterApp
What it does	Connect Claude, ChatGPT or any AI to your email mailbox	AI appointment setter for Instagram and WhatsApp that responds to leads 24/7, qualifies them and books meetings
Stage	Established	Startup
Founded	2002	2025
Based in	GB	ES
Pricing model	Freemium	Not given
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: 1 Instagram account, 1 AI agent, 300 AI messages per month, 1 comment-to-DM automation. Scale: 297 €/month (plus VAT), includes 3 Instagram accounts, WhatsApp Business number, 3 AI agents, 15,000 AI messages per month, up to 5 team members, AI analytics, priority support. Extra messages: 0.01
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	AI responds to Instagram DMs, comments and stories with human-like conversations Automatic calendar link sending and meeting booking Team inbox with human handoff and delegation AI analytics that identifies objections and customer pain points Manual chat takeover by team members anytime
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	Converses naturally and understands objections unlike button-based chatbots Responds like a real person with 30-60 second delays matching human rhythm Qualifies leads in 0.3 seconds with AI-powered scoring No commission fees on booked calls, just flat monthly price Official Meta verified provider respecting API limits and preventing account bans
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	2 −4 (down) since last check
Trust Flow (Majestic)	34	4
Citation Flow (Majestic)	32	19
Referring domains (Majestic)	61	6

7 details filled in for both companies.

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