There are technical solutions that provide similar benefits as mobi: compressing/downsampling proxy servers and microbrowsers, like Opera Mobile, which can tailor any website to small display (using Small Screen Rendering technique). However, these browsers must still download an entire page (with graphics and other related files) which, if not optimized for mobile phones, can be time-consuming and expensive to download. To improve the latter issue, the two adaptation techniques can be used together. This is the idea behind proxy-based microbrowsers like Opera Mini that download the optimized and compressed version of web pages through dedicated proxy servers. However, web pages viewed on a mobile via a proxy-based microbrowser are rarely specifically designed for a mobile phone, so it is left up to the proxy server and browser to decide what to compress, what to display, and how to display it, which, unlike the .mobi version of the site, may not necessarily be how the web page owner intends for the mobile audience.

There are also specialized content adaptation solutions, that typically operate on a server, where they employ specialized adaptation techniques to provide optimized representations of Web sites to mobile devices regardless of what browser they use. However, .mobi replaces the intermediary step with the specific adaptation of content for viewing on a mobile phone.

The W3C is also developing new authoring languages, such as DIAL (the Device Independent Authoring Language), which aid authors in creating Web sites that can be used on the huge variety of mobile devices available today. Some adaptation solutions already support the use of DIAL and similar languages in creating sites that can be used with .mobi domain names. Other open source initiatives include WURFL which addresses the problem with a large database of browser identification strings.