Vungle works well for branding and performance as video is a high impact format that and that has good CTRs and CVRs. However, for advertisers without a lot of budget, Vungle may not be a good option as the CPMs on the exchange are very high. For branding there are alternatives that have a more developed product, where video can be targeted near content the user may like, like Teads.
Smaato has a UI where you can control your line items on the traffic you want to receive. That is a key unique selling point that other SSPs don't offer. Most of the items that you will need like reporting can be done on a self serve manner and that is a big plus, specifically for changes that need to happen really fast and you don't need to deal with account managers that may take some time to answer emails.
I would say is a standard video SSP. The reporting dashboard is well designed and easy to use and throttling options are standard. They seem to be confident about their inventory and they don't really evolve their product and add new betas or create audiences or do anything out of the ordinary.
Smaato's account management team is very professional. They are quite fast in terms of customer support, which is very helpful. One item that stands out is that they are willing to understand what you need for each campaign and what is the best way to move forward. They don't just jump quickly into trying to upsell more of Smaato's products (audiences, data) like other SSPs do.
Their support team is a bit slow. You have to re-send your email questions constantly because the first email never gets a reply. Their core business is still the ad network which does not involve a lot of human interaction so they are still working on how to evolve their account management team to be an exchange.
Smaato has better anti-fraud controls than most exchanges. Even if the inventory ends up being a bit pricey, I am more comfortable running campaigns on Smaato because I know there won't be any issues with the clients claiming refunds for invalid traffic. I believe that as the industry matures, other SSPs will follow suit and prices will increase along with the board.
Vungle stands out as the only video only exchange. It is their main selling point and they have carved out a nice niche that differentiates them from the rest of SSPs. Their main competition, in my opinion, is Teads, which has focused the product more towards branding in order to monetize better for its publishers by getting higher bids.
We have seen prices a bit high, thus reducing profitability
However, the vast reach has allowed us to get more budgets and fulfill them so the net effect is positive.
We have been able to run campaigns that targeted the same user on mobile and desktop by running with Smaato and that has allowed us to get more budgets from specific clients.