Simultaneous Bid request to multiple ad exchange

[David Ryder]

Is there any plugin for publishers to send bid requests to multiple ad exchanges and other demand partners simultaneously?

[Balaji.V]

Is there any plugin for publishers to send bid requests to multiple ad exchanges and other demand partners simultaneously?

As a solution to the traditional waterfall bidding model, header bidding sends bid request to multiple buyers simultaneously and thereby reducing the latency in ad serving.
So we suggest this plug-in matching to your requirement,
https://www.reviveadservermod.com/header-bidding-plugin
Benefits publishers as they need not manage ordering the demand partner’s priority and also decreases the time for rendering the ad, improving the user experience.
This plugin also brings advantage for advertiser with a better viewability on available  inventory and a more transparent ecosystem as advertisers can trade directly with publishers.

[David Ryder]

Does this plugin will take the publisher inventory to multiple demand partners as soon as an impression becomes available in user’s browser itself?.

[Balaji.V]

If it from the browser itself then it is Client side Header Bidding. And the above plugin supports only Server side Header Bidding.  
We suggest you the below plugin which can perform both Server side and Client side Header Bidding.
https://www.reviveadservermod.com/header...e-adserver
This plugin supports Bidder Adapter feature as well and with this feature Adserver will be added to the official Prebid bidders list. Publishers who have integrated with Prebid.js send requests to ad server. And supports multiple Ad formats such as instream video ads, out-stream video ads, and display banner ads.