EXHIBIT 21

Subsidiaries of ESS Technology, Inc.

• ESS Technology Holdings, Inc. — California

• ESS Technology International, Inc. — Cayman Islands

• ESS British Columbia Holdings, Inc. (formerly known as Silicon Analog Systems Corporation) — British Columbia

• ESS (Far East) Ltd. — Hong Kong

• ESS Technology International (Korea) Ltd. — Korea

• ESS KK (inactive) — Japan

• ESS Electronics Technology (Shenzhen) Co., Ltd. — China

• ESS Electronics Technology (Beijing) Co., Ltd. (inactive) — China

• Pictos Technologies, Inc. — Delaware

• Zing Network, Inc — California

• Zing Networks Ltd. (formerly known as Pix.com, Ltd.) — Israel

• Divio, Inc. — California