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Onsite Computing Our highly qualified and seasoned team of professionals and consultants are pleasant, responsive, and guarantee their work. Your tech and computer issues will be dealt with quickly and efficiently -- be it onsite, remotely, or via a simple phone call to us. We'll optimize your processes and make them run smoothly at all times, so you can step up your game and serve clients faster.

When the city was looking for a new IT support company, Onsite Computing was the only professional IT company that had a proven track record of successfully supporting the IT needs of government and businesses since 2001.
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Onsite Computing was started in 2001 by Frank Barbarossa who proudly served in the U.S. military, holds an IT management degree from Cal State, completed technology certifications from Microsoft, and worked many years in the IT field. Onsite Computing provides Information Technology (IT) services to small and medium businesses in California and remote cloud services to business throughout North America and Asia. The goal of Onsite Computing is to help businesses use technology to run more efficiently, become more competitive and better serve their customers.
Onsite Computing, Inc. believes in paying it forward, referrals that is. If you know someone that's experiencing business IT issues, please let us know. As a loyal Onsite Computing client, you already know that providing excellent IT services and support is what we do best. We intend to not only meet your expectations but to exceed them.
Technology is, without question, the driving force behind your company's success. But like it is for many business owners, deploying, maintaining and protecting one's technology can be a challenge, especially when you've got your hands full running day-to-day operations. This is where Onsite Computing comes in, providing you powerful and flexible services and solutions to back you up.
As a Managed IT Services provider, we give you the flexibility to choose the services you want, while keeping your IT budget under control. Our IT management services come with incomparable expertise, attentive support, and guaranteed satisfaction.
Reviews (12)
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Melissa Trumbly
Jun 23, 2022
I am always blown away by the Onsite team and their responsiveness. I don't normally write reviews ever but I was so grateful for a situation one of their employees guided me through with patience and helped me resolve a important issue. Chris went above and beyond to help me and I'm so grateful. Honestly the whole onsite team is amazing! Their services are worth their weight in gold for our small business!
Corona Chamber
Aug 27, 2021
Onsite Computing is very professional and reliable when we have IT issues. They are always prompt in getting our requests taken care of. Their staff is very friendly and always willing to help us out, even at the last minute. We would highly recommend Onsite to any business that needs IT services.
Lisa Mitchell
Aug 23, 2021
Our office has used Onsite Computing for all of our IT needs for years. All of their technicians are extremely knowledgeable and professional. Any time we've had issues, they've been quick to respond. I highly recommend Onsite Computing if you're looking for IT technicians that know how to do their job, and who do their job well!
Jennifer Farias
Aug 23, 2021
Yes, Yes and Yes recommend! Honest, knowledgeable, and well mannered group of high quality individuals that make up an AMAZING TEAM. They are wonderful to work with, and have made an extraordinary contribution to our business. They are not afraid to take on challenging issues and push through to resolution no matter what. Can't say enough good about them!
Humberto Manriquez
Aug 19, 2021
I've been doing business with Onsite Computing for over three years, and this is a great IT company. All the staff is courteous, professional, and always ready to help. I definitely recommend them.
Bobby Spiegel
Aug 15, 2021
Running a very busy and active office, we rely on our I.T. partners. Onsite Computing, Inc. has been an exemplary partner for our growing needs specific to new computers, VOIP, and regular IT needs. Their response times and professional assistance has been just what we needed and continue to need. For our business, we grew in number of employees, and the various changes and upgrades necessary to operate were handled with tremendous care, and attention to pricing and quality of product lines aligned with our philosophy of being responsive to not over spend, and yet purchase quality products and services. I highly recommend Onsite Computing, Inc.
Debra Thomas
Jul 12, 2021
Our agency has worked with Onsite Computing, Inc. since 2017. The team provides excellent customer service via remote services as well as onsite. Our equipment was very outdated and Frank, along with his team, provided us with much needed recommendations and installation of new equipment and is always keeping us informed on ways to keep our system secure. Thank you Frank for all that you have done to ensure our network runs smoothly.
Dean Seif
May 28, 2021
Onsite Computing has served our company's IT needs for nearly 10 years and we couldn't be more pleased with them. The experience has been like having our own in-house IT department. Their quick response, quality of service, and seamless maintenance and updates of our network are truly invaluable to us. I highly recommend Onsite Computing, Inc. to any size company.
Robin Cruse
May 21, 2021
Onsite Computing has been my company's IT Services provider since 2015. They provide excellent on site and remote service, and fast response times. They've solved hardware, software, internet and telephone issues. We like to budget their services annually and be able to count on them for everything IT related. From the owners Frank and Kristin, to our account manager Jim, and all their smart, experienced technicians we appreciate Onsite Computing's' help keeping our team productive.
Stephanie Shapiro
May 16, 2021
Working with Onsite has been great. Their team members go above and beyond to ensure client satisfaction and provide great customer service. This is so important in today's world, where automation is so commonplace. At Onsite Computing, you get a live, local person every time. Highly recommend!
Lysandra Saldana
Nov 19, 2020
Onsite has been our IT company for almost a year now. Frank and Jim came into our office and went over all the issues and matters they could help us with. They have made good on all their commitments and promises at time of presentation. All their staff are always very responsive and professional. We are a small business, and their team works very hard to meet all our demands within same day turnaround. We are very satisfied with our service and highly recommend Onsite for any business or personal IT needs.
Eugene M.
Apr 17, 2011
We have used On-Site for over 10 years, and Frank, Robert and their team of merry men have converted our systems from a small network to on and offsite servers for backup and operations. They are able to login remotely to diagnose many issues, saving us and them time and aggravation.