If the app that we would like to connect to Salesforce does not have an open API, is it possible to still have an integration?

Yes. It is still possible to have a seamless integration even it does not have an open API. There are four alternatives for data integrations in Salesforce:

• REST API
• SOAP API
• Heroku Connect
• Third-party integration vendors like APPSeCONNECT to Connect Salesforce with back-end ERP System.

Even if REST and SOAP API don’t work accordingly, solutions like APPSeCONNECT bridge that gap for efficient data integration.