Different Ways to import third party csv files data to Crm Accounts

Hi Folks,

We have csv files stored on a server which are updated daily by third party subject to accounts data from that system.

Earlier we had a connector which used to scan these csv files and push data from it to crm by either creating or updating accounts. Now , the connector has been deprecated or not in use.

So we want to find some other approaches to replicate the process above.

Let me know different approaches . Considering integration apps we want to avoid paid apps.

So other approaches would be appreciated.

Thanks in advance,

Pranesh Juwale.