Mailbox MCP vs Guzli

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 Guzli
Detail	Mailbox MCP	Guzli
What it does	Connect Claude, ChatGPT or any AI to your email mailbox	AI agents for customer support, sales, and lead capture across chat, email, and voice
Stage	Established	Startup
Founded	2002	2025
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.	Hobby $39/month (yearly) or $49/month (monthly) for chat only with 1,000 message credits; Standard $119/month (yearly) or $149/month (monthly) for chat and voice at 16¢/min talk and 5¢/min transfer with 12,000 message credits; Pro $399/month (yearly) or $499/month (monthly) with 40,000 message credi
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	Website chat with AI-powered customer support Email support agent that reads full conversation threads Voice agent that answers phone calls and handles conversations Procedures to train agents on specific workflows Helpdesk for escalating complex issues to humans Email campaigns that agents write and respond to Voice campaigns for outbound calls Integrations with Shopify, Stripe, Zendesk, and other tools Copilot to analyze conversations and customer needs Multi-channel deployment across chat, email, voice, Slack, WhatsApp
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	Single AI agent works across all channels (chat, email, voice) with consistent knowledge and brand voice No-code builder lets you train agents on your data in minutes without engineering Agents hand off complex issues to humans automatically with full conversation context Scales to 24/7 customer support without adding team headcount Built for support teams, not replacing them but working alongside existing helpdesks
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	26 no change since last check
Trust Flow (Majestic)	34	7
Citation Flow (Majestic)	32	20
Referring domains (Majestic)	61	118

8 details filled in for both companies.

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