Current Projects


The following projects are owned and operated by Zilker Ventures or managed by Zilker Ventures on behalf of affiliated companies.


FaxCompare logo

FaxCompare.com was created to consolidate and organize information about the top providers of internet fax services (like eFax, MyFax, and RingCentral) so that business consumers can make an "apples to apples" comparison of the different service providers and select the one that best fits their needs. Having subscribed to an online fax service ourselves, we found the research process extremely tedious. Most of the providers offer similar services, but the pricing options vary widely as well as the quality and flexibility of the service. In addition, many of the providers do not list all the pertinent information on their websites, especially the hidden fees. By using FaxCompare.com, business consumers will be able to quickly understand the features most important to them, compare the top vendors, and sign up for the service. The information on our site is free to the consumers; the vendors pay us based on the number of referrals we generate.



Tax-Compare logo

Tax-Compare.com provides information about the top providers of the latest tax software that can handle returns filed in the current tax season. The top tax software companies each have several different products at dramatically different price points, so it's difficult to make an "apples to apples" comparison by simply looking at the pricing and features. Through a short questionnaire, Tax-Compare allows people seeking tax software or online tax software to input some simple information that automatically adjusts the products they are comparing to the ones most likely to work for their tax filing situation.

Because the products change each year, the site is updated annually with the current tax software products on the market.



Email-Marketing-Options Logo

Email-Marketing-Options.com was created to provide information on email marketing software providers similar in nature to that found on its sister site FaxCompare. Because of the complexity of email marketing services, the site boils down reviews of each service to five criteria:

  1. 1. Quality and ease of creating an email
  2. 2. Ability to import and manage contacts
  3. 3. Usefulness of tracking and analytics
  4. 4. Deliverability
  5. 5. Customer Service

We've designed a numeric, one to five rating system for each of these criteria. We also have summarized qualitative reviews for those who just want to see the bottom line as well as expanded, in-depth reviews for people that want to read the details.



PBXCompare Logo

PBXCompare.com was created to help make it easier to choose a virtual PBX service provider, as an alternative to expensive, traditional phone systems. We found that a lot of companies with virtual PBX services present the same information in very different ways or leave out information crucial to the prospective buyer. The lack of consistent and comparable information can make it hard to get a good idea of what an individual service is like, as well as making it more difficult to compare multiple services.



ChooseWhat Logo

ChooseWhat.com is designed to provide business consumers with practical information about basic, but important, business product categories (e.g. phone systems) and specific comparisons of the vendors. These consumers will be able to rapidly familiarize themselves with the important attributes of the category, view a complete list of vendors, and compare the ones that seem to best meet their needs. Over time, the site will be maintained, so that all the information is current, complete, and robust. Business consumers who use this site will save time and make better purchasing decisions, and vendors who receive business from this site will receive better qualified leads and have a fair portal through which they can market their competitive advantages.