It is one of the few fresh but already stable products on the market for online communities / forums and small, but seemingly stable company and developer community behind it. Offers many customization options and is easily extended by plugins.
The best part of Vanilla is its versatility. Extending Vanilla and catering to your specific needs can easily be done in a few hours of development work. This is equally beneficial to the open source as well as the SaaS solution. Review collected by and hosted on G2.com.
Vanilla has a rather mediocre performance. This is not a problem when going with the hosted SaaS product though.
It has a rather unsightly security history. Vanilla is not written with security in mind which is a problem for an open source product where vulnerabilities can be easily spotted browsing the codebase.
Also, I am a bit unsure about Vanilla's capability to adapt to future demands and rejuvenate itself in the long-term future. Review collected by and hosted on G2.com.