Section 31 starships
The following is a list of Section 31 starships.

Named 
NCIA-93
NI-1101
 (alternate reality)

Unnamed

NCIA-93 types 

Two unnamed NCIA-93 type vessels helped NCIA-93 to search for Michael Burnham and Spock's shuttle. ()

Several more ships of this type were part of the Section 31 armada that was utilized by Control at the Battle near Xahea. (, )

Classified two-nacelled starship 

Under the command of the rogue Section 31 AI Control, they were among the ships that intercepted the  and the  near Xahea. These ships were marked as classified in the Federation database. These ships shared a similar design profile to that of later  starships. (, )

Classified four-nacelled starship 

At least three vessels of this type served as part of Section 31's fleet in the mid-23rd century. Under the command of the rogue Section 31 AI Control, they were among the ships that intercepted the  and the  near Xahea. These ships were marked as classified in the Federation database. 

During the Battle near Xahea, three of these ships were destroyed by being rammed by a Klingon cleave ship. (, )

Drone ship 

A number of Section 31 starships could deploy drone ships, a type of armored auxiliary space vessel that could be stacked onto their hulls. ()

Background information 
Ryan Dening, the ships' creator, designed two- and four-nacelled Section 31 starships in both "medium" and "large" sizes for the fleet that saw action in the Battle near Xahea.  
 2
Unnamed Federation starships