About Us

Abacus is a Managing General Agent for specialty insurance products.


Abacus Insurance is an online managing general agent for specialty insurance products distributed exclusively through the abacus.net platform.

We specialize in integrating different lines of business from multiple insurance companies into a best of breed insurance program.

Our programs are available nationwide through a network of over 4,000 retail insurance brokers.

Through the Abacus platform, brokers perform all aspects of the insurance transaction including quoting, order placement, policy issuance, and endorsing.

We are passionate about improving the insurance process and firmly believe that insurance should be Intelligently Delivered ®.


Years in Business


Insurance Brokerages


Insurance Professionals


Specialty Programs

How Does Abacus Work?

We develop and automate specialty insurance products. Our objective is to expand our retail broker network and make them more efficient.

Watch Introduction video

Management Team

Leon Lewin


Leon Lewin, President of Abacus, is an insurance industry innovator and visionary. Beginning in South Africa in the 1970s, Leon built a successful insurance brokerage by creating the country’s first automated insurance office with a software program he designed. His company grew rapidly and was soon acquired by the Alexander Howden Group of London in 1974.

Immigrating to the United States in the early 80s, Leon founded Abacus Insurance Brokers in Los Angeles in 1982. Abacus was a traditional insurance brokerage house and it drew praise for the quality of its products and customer service. Ever the forward-thinker, Leon saw the potential power and opportunities of the Internet and founded the online MGA division of Abacus in 1998, becoming one of the first companies to fully automate and manage programs online.

Brokers have instant access to programs that bundle coverages from different carriers into a single integrated quote. The proprietary software, designed in tandem with Leon's two sons, Darren and Kevin, enables brokers to quote, process payments, order coverages and issue policies in minutes, and all in real time. The Abacus programs are available in all 50 states and are currently used by almost 4,000 retail insurance broker offices, representing over 10,000 insurance professionals.

The Abacus business model, under the guidance and drive of its president, has consistently kept company overhead low with savings passed on to clients. The result is that Abacus has become one of the most admired and respected online program managers in the industry. Leon's current vision is to substantially expand the programs available through Abacus and significantly increase the size of the company's broker network.

Leon lives in Los Angeles with his wife, and near his two sons and six grandchildren.

Darren Lewin CPCU, CPA, CMA

Vice President, Programs

Darren Lewin joined Abacus in 1996 and helped launch the revolutionary Abacus online insurance platform that would enable insurance brokers and agents to easily access, write and sell specialized insurance products.

By 1999, abacus.net was offering retail brokers real-time, online access to specialty insurance products. Today, brokers in all 50 states have access to programs from top-tiered carriers, and can process payments, order coverage and issue policies in minutes through a completely automated internet-based system. Because of Darren's efforts, together with his brother Kevin, the Abacus proprietary software program was a finalist in A.M. Best's 2002 "E-Fusion" contest, which scouts for the best use of technology in the insurance industry.

Prior to joining Abacus, Darren was a CPA in the New York and Los Angeles offices of Deloitte & Touche. He was primarily responsible for audits and analysis of management controls and procedures. Many of his clients were in the entertainment and insurance industries.

As Vice President of Programs, Darren's responsibilities include expanding the Abacus product portfolio and partnering with insurance carriers to underwrite specialty coverages. Darren’s experience on the financial side of the entertainment industry steered Abacus towards an entertainment niche. Abacus now insures more productions than any other market source and is a significant force in other entertainment areas such as events and floaters, as well as non-entertainment areas.


Darren has a passion for the guitar. He resides in Los Angeles, where he is easily able to indulge his love for water activities with his wife and three sons.

Education / Designations

  • University of California, San Diego, B.A., Quantitative Economics (Honors Curriculum) -1992
  • Certified Management Accountant - 1995
  • Certified Public Accountant - 1996
  • Chartered Property Casualty Underwriter - 2001

Kevin Lewin CPCU, CPA

Vice President, Technology

Kevin Lewin, Vice President of Technology at Los Angeles-based abacus.net, was instrumental in the design, development and implementation of Abacus' groundbreaking proprietary and industry recognized insurance software platform.

The Abacus platform, introduced in 1999 and continually refined and advanced since then under Kevin’s leadership, distributes specialty insurance programs online to a nationwide network of retail insurance brokers. By using abacus.net, insurance brokers and agents easily access insurance programs in real time, and sell customized insurance products to their clients. Because of Kevin's leadership and proficiency in software innovations and his deep understanding of the insurance transaction, what once took days to transact, now takes minutes.

Abacus was a finalist in A.M. Best's 2002 "E-Fusion" contest, which highlights cutting-edge developments in technology for the insurance industry. Kevin manages the company's IT division, which continuously adds new, fully automated, online insurance programs to the Abacus platform.


Kevin plays drums, swims and surfs. He resides in Los Angeles with his wife and three children.

Education / Designations

  • University of California, San Diego, B.A., Quantitative Economics (Honors Curriculum) -1993
  • Certified Public Accountant - 1997
  • Chartered Property Casualty Underwriter - 2001

Our Carrier Partners

We partner with top-rated, internationally known insurance companies and regional carriers to deliver unique products to our network of US retail brokers.

Allianz ACE Chubb Golden Bear Hiscox Zurich

Grow Your Business with Abacus

Join our broker network today and take advantage of the easiest way to transact insurance online.