which self-hosting CRM is more similar to Hubspot?

which self-hosting CRM is more similar to Hubspot?

From the available free software open source Python based self hosting CRMs, which one is more similar to Hubspot (and Salesforce), please?

Which ones will provide to the IT team and to the Marketing team transferable skills? As IT develops plugins to their API and as Marketing register leads and interacts with them via the channels?

It would be good to interact with popular channels such as WhatsApp, Instagram and Twitter as well as email.