HeyOtto vs Mailbox MCP

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

HeyOtto compared with Mailbox MCP
Detail	HeyOtto	Mailbox MCP
What it does	AI platform for kids and teens ages 8-18 with parental controls and full conversation visibility	Connect Claude, ChatGPT or any AI to your email mailbox
Stage	Startup	Established
Founded	2025	2002
Based in	US	GB
Pricing model	Freemium	Freemium
Pricing	Free plan: 100 messages/month, 1 adult + 1 child account, core safety features. Pro plan: $9.99/month or $7.99/month billed yearly with unlimited messages, 500 tokens per month, advanced AI models, web search, and priority support. Additional users on Pro plan: $5/month each.	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.
Key features	AI Assistant for homework help and creative projects Real-time content filtering and monitoring Web search with cited sources Learn to code feature Group chat for families Voice chat capability Customizable family values and topic restrictions Marketplace for sharing and remixing kid-created projects	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
What makes it different	Designed for kids ages 8-18 from the ground up, not retrofitted general AI Full parent visibility and real-time conversation monitoring COPPA-compliant with privacy by design and no data selling Safety built into infrastructure, not added as a setting AI guides students to think critically rather than just providing answers	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
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)	33 −1 (down) since last check	37 −1 (down) since last check
Trust Flow (Majestic)	20	34
Citation Flow (Majestic)	32	32
Referring domains (Majestic)	130	61

8 details filled in for both companies.

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