Cobrain vs Guardian

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

Cobrain compared with Guardian
Detail	Cobrain	Guardian
What it does	Shared memory for Claude, ChatGPT and your AIs	Human authority infrastructure for autonomous AI
Stage	Startup	Not given
Founded	2026	Not given
Based in	IT	Not given
Pricing model	Not given	Freemium
Pricing	Free: $0, up to 1,000 notes. Pro: $9/month, unlimited notes and shares. Team: $7/seat per month (minimum 3 seats), company brain with multiple admins.	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	Shared memory across different AIs Markdown notes in real folders Share branches with collaborators MCP connector for Claude, ChatGPT and compatible AIs Search by meaning on Pro and Team plans Attach PDFs and documents for AI to read Version history with unlimited revisions on Pro Permission-based access control	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	Free plan with no expiration for solo users Receivers of shares never pay Built by an agency using it daily with 648 notes	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 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)	4 −1 (down) since last check	3 no change since last check
Trust Flow (Majestic)	7	0
Citation Flow (Majestic)	27	26
Referring domains (Majestic)	15	18

4 details filled in for both companies.

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