I do agree, especially for the top 3 (Costco, Google and Tmobile) These 3 big giant does creates a positive happy and energetic working environment where they have archived to make their worker feels that working as part of their life, at home, with their family. For example, all 3 company focus on workers mental health which is the essence of a creating a healthy corporate culture!

Good read. I think few things are common -

1. Respect and comfortable work environments. Open and collaborative
2. Free thinking, respect of ideas.
3. No micromanagement.

However, I like these three bullets mentioned in the article -

• Diversify your corporate communication strategies and appeal to all learning styles by using different ways to communicate with your teams such as podcasts, coaches and gamification.
• Develop your leaders. They are a vital part of your business’s foundation, and if they don’t live your company’s behaviors and values from a place of authenticity, no one else will either.
• Put employee wellness first. Burnt out employees are costly on all fronts.

No doubt the top companies for corporate culture does focus on employee mental health. Base on the list, we could see that most company does not just make time to listen to their employee but they are transparent with their employee and give employee ways to liberate their stress! For example google encourage their employee to take their vacation so that they could start back fresh!

I think - small team and agile culture is also a major factor. If you see companies like Google, FB etc, they operated in small team with equal visibility ( now we call that agile). before giant organizations actually adopted that culture.

Employee retention is one major factor for a good workplace, This inforgraphic may help

It has been experienced that corporate sector may be small or big if adopted working cultures and employees participation and supporting them to be involved in corporate planning and growth that organisation had moved towards prosperity.

Link broken, appreciate if you could re post . Thanks Paolo!

the work environment, ethics, expectations and goals make the difference too