ArangoDB vs CogDB

ArangoDB is a multiple database; CogDB is a rdf database. ArangoDB (2012-03, BUSL-1.1, C++) ranks #2 this month; CogDB (2018-07, MIT, Python) ranks #123. They differ on 30 of 46 surveyed features.

Attribute	ArangoDB #2 = Leader	CogDB #123 ▼2 Emerging
At a glance
Rank	#2	#123
Score	76.7	27.5
GitHub stars	14.3k	397
Popularity	89.4	41.1
Activity	73.9	67.6
Community	61.2	30.3
Research	82.8	50.0
Fundamentals
Description	A multi-model database supporting graphs, key-value pairs, and documents in a unified JSON-based data model. Offers both an in-memory storage engine and a RocksDB-based engine for larger datasets.	An embedded graph database for Python with built-in persistence, traversal, and semantic vector search. It runs entirely in-process, stores graph data as triples, and exposes Torque, a Python-native API for querying relationships.
Vendor	ArangoDB Inc	NodeFn Inc.
Model	Multiple	RDF
Kind	database	embedded
Category	Enterprise	Emerging
First released	2012-03	2018-07
Status	active	active
License	BUSL-1.1	MIT
Written in	C++	Python
Query languages	AQL	Custom API
gdotv support	no	no