IBM has been the market leader in the Middleware segment for a long time now with the help of IBM Datapower Gateway and IBM MQ. Datapower is the complete solution whether you are using any protocol (MQ, SOAP, REST, HTTPS...). Since it is a hardware device it is capable of providing wire speed transfer rates with the ability to transform your message body completely or only a few tags. There are various models available in the market for Datapower like Integration Appliance XI50, B2B Appliance XB60 and Messaging Appliance XM70. Datapower has the inbuilt ability to detect threats of various natures and treat them accordingly. It gives you the flexibility to scale or descale because it provides you with a parameter called threshold value where you can define how many transactions you want to allow per minute or second. Datapower is the most secure device because it gives us the options of integrating some of the most secure protocols into our service namely SSL, TLS, OAuth, SAML and even Kerberos too. I have personally never seen a message getting lost or hacked in Datapower. Review collected by and hosted on G2.com.
Datapower doesn't have any flaws according to me. The only thing which I could suggest is that they need to come up with more detailed documentation because Datapower has a plethora of options but the audience isn't well aware of them because they have not documented them well use-case wise. Another thing is the initial setup which is quite cumbersome if you are doing it the first time. Review collected by and hosted on G2.com.
