past.dev vs AgentStack

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

past.dev compared with AgentStack
Detail	past.dev	AgentStack
What it does	Memory for AI agents	Cloud backend for AI-operated products with hosting, payments, and MCP integration
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Not given
Pricing	Not given	Not given
Key features	Ingest timestamped text Recall with ranked documents Dated evidence and sources Audience-based access control Query past dates Deletion and data removal SOC 2 Type II certified Self-hosting option MCP server integration	MCP integration with ChatGPT, Claude, Grok, and Cursor Authentication and data management Payment processing REST API Knowledge and RAG systems Project hosting
What makes it different	Maintains history of fact changes with dates Returns current facts not similarity-ranked text Verifiable with source attribution Works at scale with minimal accuracy loss	Unified backend for multiple AI models and platforms Works with any MCP-capable AI All-in-one operational tooling for AI products
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)	20 +18 (up) since last check	9 no change since last check
Trust Flow (Majestic)	0	2
Citation Flow (Majestic)	19	16
Referring domains (Majestic)	8	26

3 details filled in for both companies.