21stsoft, Denver, Colorado

21st Century Technologies, Inc.

Best Local SEO Marketing Citation Sources By City

New Study: The Best Citation Sources By City – davidmihm.com I’m really excited to announce a joint study with Darren Shaw of Whitespark that we’ve just published over on GetListed.org: the best citation sources for 93 U.S. cities. The methodology for the study was pretty simple: using Whitespark’s Local Citation Finder, we looked for some of […]

Local SEO Marketing

Local SEO/Small Business MarketingLocal SEO gets your site ranked at the top of the the top search engines local listings. When done right you are in the "A" position and your sales skyrocket. See our local small business FREE offer.

Mobile Websites

Mobile Websites Are Now RequiredAfter Google's Mobilegeddon algorithm change to recognize the importance of mobile devices, mobile friendly websites are now absolutely required. Read about Mobilegeddon and how we can build your mobile website.

Web Development

Web Development - Since the Beginning of the InternetWe at 21st have been doing web development since the beginning of the Internet. We create custom applications like maps, contact management and website customizations that are beyond the skills of other companies.

Software Development Checklist

Download our Software Development Checklist to ensure you make no mistakes in your custom software project. See our many short custom software case studies for an idea of the breadth of our software development successes.