You can still have the titles and have meetings where those with a 'lower' title can have input on decisions if you foster a culture where that is commonplace.

You can still have the titles and have meetings where those with a 'lower' title can have input on decisions if you foster a culture where that is commonplace. I once worked for a company that had managers, etc, but the president would call in the developers and designers and artists regularly for a project meeting if they were involved and the devs/designers/artists could (and did) speak up about how feasible things were, how long they thought it would take them, and how they thought it could be better. It was a mostly flat hierarchy (basically devs -> one layer of leads/managers -> president), but it did exist.