past.dev vs unify

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 unify
Detail	past.dev	unify
What it does	Memory for AI agents	Models that keep learning
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	US
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	Continuous model training from user interactions Automatic quality improvement Reduced latency and cost over time User-owned learning flywheel
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	Models learn inside the harness rather than remaining frozen Eliminates the limitation of frozen models with notepads
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	56 no change since last check
Trust Flow (Majestic)	0	26
Citation Flow (Majestic)	19	37
Referring domains (Majestic)	8	610

3 details filled in for both companies.