We also wanted Org Chart functionality, initially we built a solution for ourselves. But now the solution is available to all HubSpot customers as a HubSpot Certified App in the App marketplace.
We provide a free plan, so you can get going easily. I hope this helps, if you have any questions then please don't hesitate to message me.
We also wanted Org Chart functionality, so we created an internal solution initially. However now the solution is on the HubSpot App Marketplace and is HubSpot certified.
We offer a free plan, so when you get chance please check it out. If you have any questions then please don't hesitate to message me.