WebTitan

Avantages

Very good blocking of spam messages.
Works with any e-mail server setup.
Provides extra layer of protection.

Inconvénients

Difficult to use their web interface, as a lot of the parts don't make sense. No simple method to setup multiple users quickly and easily. But once setup, it's pretty much set it and forget it. Also, you lose 99% of control of incoming messages at your e-mail server. Which may or may not be a bad thing.

Avantages

Documentation is step by step. If it isn't in the documentation calling support quick and easy. Before purchasing the software I used the trial. To test support, called in and told them I was just evaluating the software and had questions. They didn't hesitate to answer any and all questions. Being able to talk to the ones that deal with the software daily and pick their brains was excellent.

Inconvénients

Honestly, nothing to complain about. Switched from another software DNS filtering that didn't work and spent more time troubleshooting, switching to WebTitan was a dream.

Avantages

Our primary reason for changing to WebTitan was cost. We had be fairly happy with our previous solution, but they kept driving up the price, forcing us to look elsewhere on our limited budget, and WebTitan was willing to work within our price range. One of the things I have found that I like about WebTitan is in how it displays some reports. Within the web console, it is easy to see if blocks are in a series, or hit and miss throughout the day. It also gives an easy to see overview if the block count is due to a single piece of software trying to "phone home" at a single URL, or if there seems to, instead, be an effort by the user to get to prohibited content via a variety of URLs. Overall, easy to use solution that works off of categories, but still is easy to whitelist or blacklist given domains, etc.

Inconvénients

Two short-comings readily stand out for our needs/desires.
1) There is no "P2P" category. While there are legal and legitimate peer-to-peer websites and software, we want to block such activity, and limit access to such software as much as possible. Without the P2P category, we're left either with an overly restrictive policy blocking all download sites and then whitelisting a lot, or we stick with only blocking "illegal"/hacking/etc, and then blacklisting P2P sites that aren't caught in that as we find them. Neither is ideal.
2) The emailed reports are not nearly as helpful as the web console reports. I cannot seem to get it to show the same list of blocked attempts in the email. I can only get a block count by category along with a unique domain count. But without being able to see the domains along with timestamps, I have to keep going back to the console to decide if action is required or not.

Avantages

The top feature for us was the integration with Cisco ISR. It is really easy to switch on/off webtitan without affecting the user: Just an access list membership in wccp configuration does the trick.

Inconvénients

Integration with AD does not work. Unless you push some agent to the client, the product does not consistently work, neither by static IP nor by any other means.

Avantages

It's great at what it does. Once you get all of the settings configured, it becomes very good at blocking spam so that it doesn't come in. By default it's pretty restrictive, but that's been helpful to start. We just lightly loosened it to the settings we needed.

Inconvénients

There's not a way to bulk add email addresses to the list of monitored emails. You have to add them one by one. Support told me that this is a coming feature.