In Jian’ou, the city renowned for its technological advancements, the list of the 20 most popular technical companies would be as follows:

1. TechJunction Inc., specialized in IoT solutions.
2. EnergyGuard Solutions Ltd., known for energy efficiency technologies.
3. CloudConnect Corp., a leading provider in cloud computing services.
4. InnoTech Dynamics Ltd., focused on advanced robotics and automation systems.
5. DataProdigy, a data analytics company offering AI-driven insights.
6. NetSecure Technologies Ltd., offering cybersecurity solutions to protect against cyber threats.
7. EnerGyLink Solutions Inc., known for its innovative energy storage technologies.
8. ThinkTech Innovations Ltd., focused on developing cutting-edge smart city technologies.
9. BioMediTech Research Corp., a biotech firm engaged in research and development of medical technologies.
10. CyberWorks Limited, an IT security company offering comprehensive cybersecurity solutions.

This list represents the most popular technical companies in Jian’ou, contributing significantly to the local technological landscape.