Dimdim has many features of the larger tools available for web conferencing at a much lower price. They have a free version for up to 20 participants and $25 for 50 participants. The Dimdim Webinar version is $75 for 100 participants and the tool also offers an Enterprise version, which can be used for up to 1,000 participants.
The other concern that seems to plague many of these tools is the security. The free Dimdim application security level is very low, especially within the text chat windows. The upgraded versions, such as Pro and Enterprise, do provide additional monitoring of the program to ensure a higher level of security, but with any of these tools it is not advised to share any confidential information at anytime.
Some of the Dimdim concerns include poor voice quality, which also impacts the recording quality. Along with the audio, there has been a reported video delay among participants. Additional concerns for some users include the lack of embedded polls or surveys. Dimdim suggests creating external polls in a site such as Micropoll or Surveymonkey and then displaying the direct URL within the Dimdim meeting. Although this does seem to resolve a potential need for some users, another feature that is not available is the raised hand feature that allows the host to control two way communications on a larger conference call.
Finally, the other drawback of Dimdim is the inability to load a meeting in advance with necessary documents for sharing. Although this can be done rather quickly within the tool, the ability to prepare in advance is a nice feature of some of the other tools available. Additionally, once a document is loaded, the viewing screen is sometimes smaller than expected, causing viewing difficulty. As with any of these tools, it is advised to review the various options and match them with your needs.
Access the Dimdim website here to find out more on your own.