What integration platform / integration middleware do you recommend for Sage X3? (Eg. Dell Boomi, Jitterbit, Nintex, other)

For the purpose of;

1. EDI integration to supplier networks (eg. SAP Ariba, Basware, Coupa)

2. In-house integrations between legacy on-premise systems and cloud apps.

3. leveraging the X3 API.

I can see Jitterbit is listed in Sage Marketplace, but beyond that can see no Jitterbit-Sage documentation, no Jitterbit-Sage adaptors, no mention of Sage on Jitterbit or vice versa.