Cellular Connectivity for the Internet of Things
Hologram (hologram.io) has 14 customer reviews on Five Star Index, with an average rating of 3.1 out of 5.
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Computers & Phones · Chicago, Illinois
Excellent
Computers & Phones · Crystal Lake, Illinois
Excellent
Computers & Phones · Chicago, Illinois, Illinois
Excellent
Computers & Phones · Chicago, Illinois
Excellent
14 approved reviews, newest moderated first
James H.
Hologram’s IoT SIMs have provided me with efficient, effective and economical connectivity.
Response from HologramAug 14, 2025
Thank you, James, for your review! We love to see that you're experience the "three E's" - efficiency, effectiveness and economical. We appreciate your support as a Hologram customer.
Simpex
We had been using Hologram SIM cards for about a month with no issues—until 4 days ago, when SIM cards began disconnecting one after another. All vehicles went offline, even though they were on the move. The dashboard showed them in “Ready” status but with no connectivity. We contacted sales support via the website, submitted a ticket, but no one responded. Instead, we received automated replies from an AI bot via email, which couldn’t resolve anything. The AI chat on the website also blocked access to any real human agent, which is unacceptable for a mission-critical service. We can't afford to lose our clients' trust or wait more than 5 days for a fix, so we made the decision to completely stop using Hologram SIM cards. We are now switching to Emnify, which—while more expensive—offers much better performance, reliability, and full control over our fleet and connected devices. We're currently in a testing phase to choose our long-term provider, and Hologram.io is now permanently eliminated from our list. We strongly do not recommend Hologram to any serious business.
Response from HologramAug 14, 2025
We are sorry to hear that you had such a poor experience. I have flagged your review with our Customer Support team for follow up. We certainly want to learn more about what happened so we can ensure this situation doesn't happen again. Thank you for providing a review so we are aware.
Aquarius M.
I’ve been with them 3years and their network is horrible. Constant network outages and they overcharge you for data/sms usage that you don’t even use. You CANT speak to a live person unless your getting new service. They will have your business so unstable. Worst service EVER. Bunch of amateurs in support. Scripted support. Epic Fail. Don’t use them. But it seem All IOT sim companies are the same. Full of Sh&!
the C.
Shameless SPAMMERS Once you are on their CRM, that's a marriage! I have being trying to enforce my divorce since years now, unsuccessfully. You have been warned now. Forewarned is forearmed.
Pat
Got a spam email from them out of nowhere and I just ignored it. Then I got another spam email only 2 days later: Hi ***, I reached out a few days ago to see if you're ready to engage ........ To me that is really pushy so I decided to leave this review.
customer
We were in the process of becoming a customer and had developer questions about their API. After brief correspondence with our lead developer, they reached out to him and offered him a job. If you want a scumbag partner that will try to poach your key employees, this is the partner for you.