Greenfield had built our first platform in 2007 and had maintained it till the company’s M&A in 2014. During that time, Greenfield had implemented dozens of features and improvements to an Open Source product, that was unable to sustain our business. Greenfield’s ability to quantify the business requirement into actionable development, is only surpassed by their ability to make the process fun and budget conscious. They are the ideal telecom development partner.

Undisclosed Calling Card Service - CEO and Founder

Greenfield had developed the entire voice infrastructure for our online food delivery business. Ranging from building, maintaining and later on expanding their solution to our requirements – their delivery was always spot-on. Starting with a careful analysis of our business requirements, followed by in-depth technical design and specification, Greenfield had provided the most economical, stable and future proof solution – that had been serving us for over 10 years.

Undisclosed Food Delivery Service - CEO and Founder

Greenfield has been a valuable partner in building and operating the Marathon Telecom voice services backbone. Their ability to provide innovative solutions to complex business and technical challanges, while keeping it enjoyable and friendly is unique and refreshing. Over a course of 7 years of collaborative work, they had provided multiple services to us, both on-site and remotely.

Jeegar Swaly, Marathon Telecom, United Kingdom - COO

Greenfield had built the complete Marathon Telecom mobile network voice services backbone back in 2009. Since then, the platform had served tens of thousands of subscribers worldwide, serving millions of call minutes per month. Greenfield’s unique approach to problem solving yielded a highly economical solution, that fitted within the company’s budget and business plan.

Rony Cohen, Marathon Telecom, United Kingdom - CEO

Nir is a professional and trust worthy business partner whose knowledge in Open Source IT platforms in general and Asterisk and telephony in particular make him an asset to every organization wishing to make full use of these technologies.

Gilad Ben-Yossef, Codefidence - CEO and Founder

I worked with Nir while CTO in Atelis PLC. Nir is very knowledgeable in what he does (in this case Asterisk IP-PBX) and combine rare technical and system architecture/broad picture abilities. He can go from system design to coding the system in no time. He has quick understanding of the requirements and ability to come up with applicable solution to the problem at hand. In addition, Nir have vast industry knowledge in his field. I warmly recommend him.

Nir Ganani, Interwise (Acquired by AT&T) - Director, Integration Products

As Senior manager at Artnet experts I have had the privilege to work with Nir who is highly skilled professional and a fantastic person. I strongly recommend him to anyone who would like to work with him.

Patrick Perelsztejn, artNET experts (Acquired by Malam Team) - R&D Manager

Nir is very knowledgeable about Asterisk/Digium products and he has successfully implement many custom applications. His work continues to be used in very large installations and his reputation is impeccable in the industry.

Greg Vance, Digium - APAC, Middle East, Africa Channels sales Director

I have known Nir few years, and have used his expertise and knowledge in few cases. During this time Nir has proven to have extensive know-how and experience in problem solving and problem approach menologies. In all cases it was a pleasure working with Nir. The interaction was always professional and proved to provide an in-depth solution to our problems. Nir is a very nice person to work with, I will be happy to recommend him for whatever association he seems fit.

Nir Grinberg, ITC – israelnumber.com - CEO and Founder

I have turned to Nir for consultancy on a pretty minor issue, when I was looking for VoIP solutions through a high-end global vendor. Nir has offered me a competitive proposal through Greenfield Tech and has delivered on it perfectly. I enjoyed using his simple and flexible API and would recommend his services to anyone interested in a grade-A VoIP professional. A real pleasure to work with. I am looking forward to our next collaboration.

Mushon Zer-Aviv - Self thinker and creator, artist

Nir instructed a Linux course for programmers in my company. He showed professionalism, and good personal relationships. Nir kept the good atmosphere and assisted also on questions beyond the course scope. There is no doubt that Nir masters the Linux OS. I liked to participate at Nir’s course and will be happy to do it again in the future.

Freddy Rolland, Cisco, Israel - Senior Developer

GreenfieldTech is our partner for complex projects, as well as our “one stop shop” for new solutions that we regularly add to our IPT environment. Their professionalism and creativity impresses us time after time and we count on them for our infrastructure which spans five continents.

Yonatan Fields, ClickSoftware, Israel - Global IT Management
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