Maybe the question should be different “Top Web Development Agency in California” or “Which Digital Agency in California building the most persuasive websites and mobile apps?” if you will search this term result will be totally different and you will get some unique list of web design agencies. So,finding the best digital agency is quite tricky.
You can see their showcase listed in their website. But most of the companies have mentioned showcase of some brands like Microsoft,Google,and News Platform that they have been featured with their articles and blogs not for services. We have found that what we have seen but we are not using our featuring articles for showcase. We are only using our owned projects that have been accomplished in given timeframe.
