Have a sequential deal number created each time a deal is created

I find it really crazy that Hubspot does not provide this feature. We need a 5 or 6 digit sequential numbering of each opportunity/order to be used also in:

- Hubspot

- our platform

- our billing system

Such an ID is vital to have a key connecting the 3 envirnoments. I’m now challenging the idea to migrate from Salesforce to Hubspot.