1.
SightCall 2008
2.
Sigma Artificial Intelligence
3.
Sign-Speak
4.
SignalX.ai
5.
Signapse
6.
Signatrix 2017
7.
Signity Solutions
8.
Signo.in
9.
Silk Data
10.
Silver Egg Technology
11.
SiMa.ai
12.
SimByte