Zoho opened a platform for developers
Zoho unveiled Zoho Office Platform - a brand new way to integrate, connect, and build solutions over Zoho's world class office editors. It provides a set of simple, easy to integrate APIs to give your apps a built-in document editor. Create, open, and edit documents right from your web app. This is especially helpful for businesses that are building a web application but still need fully-featured office editors to handle document management in-app. You can connect your apps to the Zoho Office Suite using our Open APIs. This will let your app users create, open, edit, convert, publish, and manage Zoho Office documents right from your app. Take a look at our detailed Sheet and Writer API docs to get started.
Zoho alternatives are: G Suite, Basecamp, Office 365, Salesforce