• You have a web application, but want a full-featured office editor to handle document management from within the app.
  

• Your business policy prohibits keeping customer data in a public cloud. So you need a solution that allows you to store these documents on your own servers, to ensure data compliance.
  

• Business users should have a seamless experience when they view, edit, and collaborate on Word, Excel, and Powerpoint files online. An integrated office solution should work on all modern browsers and support all popular document formats. 
  

• You want a document management solution that's easy to implement with minimal configuration and doesn't involve additional hardware costs.
  

• The integrated office solution should have an affordable and flexible pricing model.
  

While MS WOPI does the job well, it's also expensive and difficult to implement. Zoho Office Integrator ticks all the boxes when it comes to meeting the content editing needs of your business, without all the complications.

Features	Zoho Office Integrator	MS WOPI
Solution	Integrate Zoho Office Online with your web  app.	Integrate MS Office Online with your  web app.
Integration	Embed editors in iframes. PostMessage APIs  help communicate between web app host  page and iframe.	Opens editor only in a browser tab or  window. No embedding allowed.
Customisations	Customise editor preferences and document   defaults with advanced parameters.	Doesn't allow for customisation of  editor features.
Limitations	Complete feature parity in all online office  editors - Writer, Sheet, and Show.	Word Online lacks many of  the  features of the desktop app, and   some features work differently in the  two.
Extend API Functionality	Compare two files.   Convert files from one format to another.	No such functionality.
File Limits	Writer - Docx file: 50 MB, Other file formats: 10 MB  Sheet - 25 MB  Show - 512 MB	Word - 100 MB  Excel - 25 MB  PowerPoint - 300 MB
Storage Format	Stores all popular document formats - MS  Office/Open Office/HTML/txt	Stores only in MS Office formats.
Supported Formats	List of supported file formats.	docx, doc, rtf, pptx, ppt, xlsx, xls, pdf, txt
License Model	For web editing, users don't need to have a  Zoho account.	For web editing, users need a Office  365 account.
Pricing	Usage-based pricing plans - commercial and  non-commercial.	User-based Office 365 subscription
Forever-free plan
Starts at	$50/Month No user subscription required. Flexible pay-as-you-use model.	$240 Business user subscription required for document edits. $20 per user/month, billed annually.
Authentication	Single Zoho account for authenticating  open/edit document requests. Users don't  have to create individual accounts in Zoho.	Office 365 subscription mandatory.  Each user is prompted to authenticate  with a Microsoft/Office 365 account to  edit documents.
Ease of Integration	Implementation in 2 easy steps:  1. Open/view/edit/co-edit documents with  standard API requests.  2. Save edited documents back to your  storage server with a saveurl method.	Fairly complex WOPI protocols, and  requires separate implementation to  "view" and "edit" documents.  1. To support document view, WOPI  hosts must implement CheckFileInfo  and GetFile modules.  2. To support document edit, WOPI  hosts must implement other modules:  PutFile, PutRelativeFile, Lock, Unlock,  UnlockAndRelock, RefreshLock.
Server Requirements	Office Integrator solution runs on any server  environment (including Linux).	MS WOPI runs only on Windows  servers.