[HelgeSeetzen]

A lot depends on the leadership style of an organisation, no so much its size or business. Diversity ultimately creates better organisations, but it's harder to manage every day (that's true for all diversity: gender, culture, language, orientation, religion, "mindset", etc.). So look for organisations where "people management" is recognised as a valuable skill set, not just something that people do after some tenure period at the company. A lot of tech organisations unfortunately fall into the latter category.

A good first-glance indicator is whether the management titles of the organisation are given based on tenure (older people and/or long term employees), domain expertise (e.g. the most experiences developers have management titles) or leadership skills. Try to find companies with the last type of promotion system and you are very likely going to have more gender diversity as well.