[bleonard]

Piesync looks cool. I don't see any databases on their list, so it looks to be mainly syncing between SaaS apps. We are open source and running in your own cloud as more of an ETL process.

Grouparoo is set up with sources and destinations. The most common sources are likely to be databases/warehouses and the most common destinations are tools like Marketo/Zendesk/etc. That being said, Zendesk will likely be a source one day to pull user info into Grouparoo (number of tickets created, lastEmailedAt, etc). Databases can already be destinations (write back out the member of the VIP group to Postgres, in addition to sending it to Marketo and Zendesk).

I'm not sure all of that is two-way sync or not, but it's certainly round-tripping the data. If you really want a full duplication in your data warehouse of a SaaS tool, I'd look into Stitch or Fivetran at this point. Then, Grouparoo will happily read that :-)