# Frontend Submissions - Extension Compatibility

[Frontend Submissions](https://easydigitaldownloads.com/downloads/frontend-submissions/) is compatible with many Easy Digital Downloads extensions. ### Amazon S3

Frontend Submissions is fully compatible with the [Amazon S3](https://easydigitaldownloads.com/downloads/amazon-s3/) extension with some minor behavioral changes. Uploading works exactly the same, but Vendors may not browse the server. If they need to change files, the site admin must upload a new one. If they need to revert, they cannot browse to the original file, and they have to re-upload that original file. [Read more information about Amazon S3 and Frontend Submissions here](https://easydigitaldownloads.com/docs/amazon-s3-and-frontend-submissions/). ### Commissions

Frontend Submissions is fully compatible with the [Commissions extension](https://easydigitaldownloads.com/downloads/commissions/). You can read about how that integration works in [this document](https://easydigitaldownloads.com/docs/integration-guide-commissions-and-frontend-submissions/). ### Custom Deliverables

With Frontend Submissions and [Custom Deliverables](https://easydigitaldownloads.com/downloads/custom-deliverables/) your Vendors can deliver customized files to their customers. See [Custom Deliverables - Frontend Submissions Integration](https://easydigitaldownloads.com/docs/custom-deliverables-frontend-submissions-integration/) for details. ### Dropbox

The Dropbox File Store extension is **incompatible** with Frontend Submissions. ### EDD Message

[EDD Message](https://easydigitaldownloads.com/downloads/edd-message/) integrates perfectly with Frontend Submissions. With both active, it is possible to send unique, custom messages directly to Vendors. Additionally Vendors can send messages directly to their own customers. 

### Purchase Limit

There's no direct integration between [Purchase Limit](https://easydigitaldownloads.com/downloads/purchase-limit/) and Frontend Submissions, but if you add a text field to your Submission Form and give it a meta key of **\_edd\_purchase\_limit**, the value entered by the Vendor will be set as the limit. Please note this will only work if the Vendor is submitting a single priced product. If they are using variable prices, this method will not work. The site owner would have to edit the submitted product(s) manually.

### Recurring Payments

[Recurring Payments](https://easydigitaldownloads.com/downloads/recurring-payments/) and Frontend Submissions are not fully integrated. Vendors will not be able to set recurring payment details in the submission form. However, recurring payment functionality can be enabled for vendor-uploaded products through the Edit Download screen by the site owner once submitted. ### Simple Shipping

When [Simple Shipping](https://easydigitaldownloads.com/downloads/simple-shipping/) and Frontend Submissions are both active, a "Shipping" field will become available in the "Add Extension Created Fields" section of the Submission Form. When this field is added to the Submission Form, Vendors will be able to define their own international and domestic shipping rates for each product. Additionally, if a Country field is added to the Vendor profile form with the meta key "vendor\_country", shipping calculations at checkout will be based on that value instead of the one saved in the Simple Shipping settings. [See detailed instructions here](https://easydigitaldownloads.com/docs/integration-guide-commissions-and-simple-shipping/). ### Slack

[EDD Slack](https://easydigitaldownloads.com/downloads/slack) includes an integration with Frontend Submissions. With EDD Slack it is possible to receive notifications within your Slack channels when Vendors register, submit products, and edit products as well as when customers contact Vendors. Additionally, EDD Slack can include interactive buttons within notifications for Vendor applications, submissions, and product edits so you can approve or reject the request right from Slack without having to login to your WordPress dashboard. ### Software Licensing

The [Software Licensing extension](https://easydigitaldownloads.com/downloads/software-licensing/) is **incompatible** with Frontend Submissions. 
### Other Plugins

If you think perhaps you've found a conflict, or are wondering about a specific plugin, feel free to [open a support ticket](https://easydigitaldownloads.com/support/) and we'll be happy to answer your questions.