Currently, there's an interegration with HubSpot, but it would be great if it's a 2-way sync like Salesforce.
See the HubSpot/PieSync comment from Juan Duran on Apr 13, 2021. Keep in mind, PieSync is no longer a standalone product since the aquisition by HubSpot. Users must purchase the HubSpot Operations Hub at a minimum cost of $800 USD per month.
Commenting on Kalo Yankulov, Jan 26, 2021: A two-way sync is a huge bonus for Encharge users connected to HubSpot.
Also more importantly, Hubspot needs to be able to sync from 1 account to multiple Encharge accounts. I use the same Hubspot CRM with multiple Encharge accounts. Encharge needs to fix this.
Hubspot bought PieSync to do so, https://www.hubspot.com/company-news/piesync