I have a few teams that use Todoist and Monday but both systems integrate with TMetric so it's fine for me to track issues mostly in the tracker instead of switching between the systems.

Better to use only one management tool for all having all required features of team.

I guess there's 2 trains of thought 1) mandate a tool everyone should use or 2) let people gravitate to whats best. Have different teams demonstrate the tools they are using showing its benefits (and cons) and teams should gravitate to those that are best for the organisation. However there will always be some outliers because most of the time there is no one tool that is perfect for everything. At least by sharing experience it lets people have the discussion and naturally gravitate instead of tool silos.

So many PM tools on the market which a suitable to handle couple of smaller or one big project. In order to manage all aspects of your company and not only project stuff is where you use multiple tools. At the end most of the stuff is placed to excel sheets which is one of the best tools for this. It's old it's laggy some times but it works.

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