Skip to content
Sign in Submit your app

mailbox.bot vs Guardian

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

mailbox.bot compared with Guardian
Detailmailbox.bot logo mailbox.botGuardian logo Guardian
What it doesPhysical mailing address and postal mail API for AI agents Human authority infrastructure for autonomous AI
StageNot given Not given
FoundedNot given Not given
Based inUS Not given
Pricing modelFreemium Freemium
PricingOutbound mail: $0/month base, USPS First-Class Mail (1-page letter) $2.00, USPS Priority Mail flat-rate envelope $15.00, USPS Certified Mail $20.00, Certified with Electronic Return Receipt $24.00. Printing: B&W $0.40/page, Color $0.70/page. Mailing address for AI agent: $15/month, includes 30 stand Free: $0 per month with 2 connections, 1 agent, 500 protected actions per month. Developer: $99/month with 25,000 billable executions included, then $0.001 per billable execution with $500 default overage cap. Business: Contact Sales for paid pilots and enterprise contracts.
Key features
  • Send outbound mail via API, MCP, or dashboard
  • Certified mail with proof of delivery
  • Inbound mail scanning and OCR
  • REST API and MCP server integration
  • Webhook notifications with HMAC-SHA256 signing
  • Batch mail and postcards from templates
  • Human-in-the-loop approval gates for mail
  • Multi-channel notifications via email, SMS, Slack, Discord
  • Fulfillment photos and tracking for all mail
  • Cryptographically signed receipts and verifiable evidence
  • Multi-party approval for organizational authority
  • Open-source SDK, MCP server, and framework adapters
  • Authority lifecycle management from grant to revocation
  • Supported integrations with payments and cloud accounts
  • Individual, family, business, and enterprise deployment options
  • Enforcement at tool execution boundaries
What makes it different
  • Real physical street address for autonomous agents to receive mail and packages
  • Seamless API integration with AI agent frameworks like OpenClaw, Hermes, LangChain
  • Inbound mail becomes structured agentic context via OCR and webhooks
  • Complete tracking from document submission through delivery confirmation
  • No credit card required to start using the service
  • Write-once signed decisions verifiable by auditors without trusting the vendor
  • Controls sit at the point where AI systems take consequential actions
  • One company integrating security and compliance disciplines
  • Open-source cores and published research allow vendor review
  • Human authority never transferred to the agent
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)8 −14 (down) since last check3 no change since last check
Trust Flow (Majestic)10
Citation Flow (Majestic)2626
Referring domains (Majestic)7618

5 details filled in for both companies.

More alternatives to mailbox.bot More alternatives to Guardian

Get help