New to this service. Robert is very personable efficient…read moreand on time. All in all great service.

Excellent prices and service. I am willing to recommend Rob especially if you value a traditional…read morebusiness that knows how to take care of its customers.

The Job:…read more Installation of a 4-camera system around a 4 unit condo building in the Marina district of San Francisco. The building is very hold (over 100 years) and installation was unique and complicated. The Process: Jose and his team did an initial consultation and his bid came in at what my HOA board determined to be a reasonable amount given the level of install difficulty and customization required. The end results were excellent and I would strongly recommend using Jose. Strong Positives: -Jose was very flexible to timing for installation and was willing to work on the weekend to accommodate certain residents' schedules. -Jose worked extremely hard and provided important insight into the various aspects of install, camera placement, and a clear end result.

Jose and his company were amazing at installing a 6 camera Power Over Ethernet system during my…read morehome remodel. I was a Deep Sentinel customer with wireless cameras and wanted to upgrade to wired. Jose designed an entire system with me and worked to coordinate his work with the remodeling. By doing this we were able to run all cameras with virtually no conduit and made the entire system seamless with our house. Jose worked so hard for us and worked with us when he had to make extra visits due to coordinating with construction. I know he did more work for us than originally estimated but the final job was 1000% amazing. I would recommend Jose to anyone!

I had a battery replaced in a motion detector, they charged me $80.00…read morefor $5.00 battery, and a $100.00 for a service call. All in 10 minutes, I don't mind the service call, but the battery fee was a bit excessive. Plan to do my own trouble shooting from now on.

Antoinette McAnallan was most helpful with respect to alarm notifications, contact list and how…read moreprocess works. And, she was most patience and understanding relative to my queries. Bravo, Antoinette.

Just had my vintage home alarm serviced by First Alarm Rohnert Park. Koby did an amazing job. He…read morewas able to troubleshoot and discover the problem immediately. He was knowledgeable, efficient and completed the work in a timely manner. He was such a nice guy! The office staff, Laura and Daisy, were very helpful and supportive. I highly recommend First Alarm for all your alarm needs.

Koby came and installed our updated service. He did a great job and we enjoyed his personality.read more

I'm a rural IT lead -- Martin answered my call on the 2nd ring. He was my 4th service provider I…read morecalled and the only one to answer. He was knowledgeable, ready to work, and critically -- willing to drive all the way out here. He's part of a dying breed that're willing to travel more North where less money is instead of reserving his time for possible SF Bay Area gigs. Please use his services. We need more Martins.

If you are looking for someone to help you with telephone systems, cabling, wifi, voip, security…read moresystems, low voltage and more.... These guys are who you want! Martin Wolfe has owned the company for some time and his kind and thorough approach to excellence in all they do and their customer appreciation and service is TOP NOTCH. I love that they are still a small local business doing huge things and haven't sold out to the other bigger local companies that just don't compare when it comes to the things that matter most when choosing who to give your business to. Fair, go above and beyond, always available!! Martin answer his phone 7 days a week am or pm for his clients, personally! If you need telecomm help or incredible, in-depth advice with integrity... call Martin. Not to mention how much volunteer work and fund raising he does personally within the community and victims of natural disasters! Incredible!

Had the pleasure of working with SR technologies, I sent an old desktop where I needed the data…read moreextracted and they had it ready in a few days. If you have old laptops laying around this is the best thing you can do for yourself! They will recycle after extracting your data!

On time Gave great budget options…read more Shared insights to what is needed and what is truly optional

In 2024, we trusted Granko Inc. to fix our unstable Comcast wifi issues and bring their…read more"professional expertise" to our network. This is a sad story of the betrayal of that trust, their underhanded ways and the hero who ultimately saved the day! With their matching Tshirts and cringey bravado, Granko descended upon our property promising a new era in internet stability; "you'll never have to call Comcast again... just us!" Oh boy... you know the type. We hoped they'd do right by us so we whipped off a positive review when they finished. PRO TIP: Never, for any reason, write a good review in the first 24-48 hours. Within a few days, the system reverted to its old tricks--dropping Sonos amps, latency issues and random WiFi shut downs. But worse...where we once had WiFi throughout our property, we now had nothing outside our homes. What? We had just paid for extenders to boost the signal and exorbitant labor fees only to make things dramatically worse. What then ensued were a flurry of emails from July - Dec, more equipment and labor charges. Granko claimed the wiring was compromised, sonos amps weren't hardwired, Sonos did software updates, faulty splitters, etc... all those fixes were implemented but surprise, surprise! Everything was exponentially worse. In 2025, medical issues sidelined us and frankly, we didn't want to deal with Granko. It was annoying, they never re-examined network wide solutions and consistently threw more equipment at any issue. Sensing a pattern here, folks? In July, 2026, we foolishly decided to call them as issues still plagued the system.Their answer? More equipment and labor. And, once again, no change. At this time, quite randomly, we found out that we were missing some equipment. We then went through the digital site map with Granko. In 2024, we had paid for 4 ULTRA 60W network switches but they were nowhere on the map. Just last month, we had paid for 2 U7s, only one appeared on the map. Granko admitted they swapped out 3 of the ULTRA 60W for a cheaper product but never told us. And they had no idea where the 4th switch was. They blamed the missing U7 on the old "miscommunication between techs". I picked up the owed U7. Granko's wife gave me a taped up box which had been previously opened with the accessory packaging opened. Classy! Thankfully we had been interviewing technicians and Diego Cid of Sonoma Tech Solutions came for a consultation! Within 40 minutes, he assessed the situation. Diego spent 2 days in 90 degree heat, modernizing and optimizing our network. He reinstalled routers and switches, corrected the network topology establishing a single gateway and end-to-end network, put Sonos under the same network and adjusted for multiroom operation. He also found that Granko never installed the U7s and other boosters properly... they had them too low, their reach was totally neutered by obstructions! Diego also cleaned up all the wiring in our boxes. See pic below. The caption function isn't working... the messy cabinet is what Granko left us. The beautiful, neat and accessible cabinet is Diego's) Within moments, after he finished, our system started performing beautifully. We had WiFi around the property, the internet speed was faster and our Sonos amps were working beautifully. It's been a few weeks now without an issue... since our problems were daily, the change was obvious!!! So this begs these questions... --Does Granko install for obsolescence? Do they intentionally build a system that will routinely fail so they can add more equipment/labor, creating an endless money stream? Did they see us, 70+ senior women, as marks? --Does Granko know what they're doing? Pretty incompetent not to know how to install U7s and boosters. Worse, Sonoma Tech Solutions took minutes to understand the network topography was completely unworkable. Intentional (see point above) or perhaps they have no idea what they are doing?? Regardless of who you hire, do a full review of what they promised and all the prepaid equipment to accomplish that. If you are interested in getting the work done professionally and right the first time, contact Diego Cid at Sonoma Tech Solutions (707) 237-4894.

If we could give them a negative 100 we would. This company…read morewas hired to do a Control4 upgrade of my system and was given a list of tasks to perform. Their quote was higher than other dealers but the assurances they gave to fix everything got us to select them. They came in and replaced a lot of hardware saying it was needed to make the system better. Granko did the hardware work and one task out of 12 and then refused to finish the job but wanted to be paid a $5,000 balance on a $13,000 quote. Then they insisted on getting another $15,000 to finish the work they promised would be done in the first job and even more money for other work. We refused to pay the bill until the work was completed as agreed and the owner's wife threatened collections and court. Then when we refused to pay because they would not make it right, our entire system crashed and was not operatable for 5 days. Turns out they installed software to allow them to get into the system remotely which they did not have permission to install and they concealed it from me and did not provide the passwords to the system. We know that Granko turned off our system remotely because they said " Gee we can fix your system easily, just pay the bill for the work you say we didn't do!" We had to pay a network company to come in and reset the wifi system and remove the secret access that Granko installed. DON'T USE THIS COMPANY THEY ARE MISREPRESENTING CAPABILITY, AND DON'T KEEP THEIR WORD. THEY REFUSED TO COMPROMISE AND THEY OVERESTIMATED THEIR WORTH. THEY GIVE US A BIG STORY AND DIDN'T LIVE UP TO 10% OF WHAT THEY PROMISED. WE ARE SUING THIS COMPANY TO RECOVER OUR LOSSES AND HAVE OUR SYSTEM RESTORED BY ANOTHER COMPANY AT GRANKO'S EXPENSE. This company is a ripoff and can't be trusted. They tell you one thing and do something else. Our system is slower and crashes now than when they started working on the system. The problems increased instead of being solved.

Office responded to my message with an immediate call. Crew…read morearrived at my house at designated time . Smoke and carbon monoxide sensor on high ceiling was beeping every few minutes. They did not have special batteries needed so they went and purchased them at a nearby hardware store. The batteries were replaced and all was well. A very professional job well done. I will surely call them again whenever a similar situation arises.

Excellent customer service from this company. First time working with them and I found them to be…read moreprofessional, friendly, AND on time! They know how to properly install low voltage cables, routers, Starlink and much more. Devin, Whitney, Eric, and Parker -- all great!