Therma and GlacierGrid alternatives for walk-in temperature monitoring
By Vimal Bhaya, Founder and Lead Systems Architect · Last reviewed 31 October 2026
This is a continuation of Temperature monitoring alternatives, a 12-part tutorial. You are on part 7 of 12.
The short answer: people leave Therma, now GlacierGrid, because it now sells energy services they may not need, and demand response that swings the box's temperature. Therma rebranded in February 2024. Its monitoring is still sold, with the hardware rented inside a monthly fee.
If you want monitoring that only watches, with hardware you own, go for TemperatureWise, which we make. If you want an enterprise monitoring service, SmartSense. Installed and managed, with checklists, Checkit. A platform you run yourself, Monnit.
This is a disclosed guide, not an independent ranking. Each option below gets the case where it is the better buy.
Switching out of Therma, now GlacierGrid? We make it easy as A, B, C
TemperatureWise moves you over in about a week, with both systems running side by side. GlacierGrid runs energy management on top of its monitoring, including demand response that precools the site. TemperatureWise only watches: it leaves the setpoint alone, and reads the whole temperature history for a unit that is starting to fail.
- We hold a quick meeting with you to export all your data. On a short call we export your full GlacierGrid history together, before the old account closes. TemperatureWise imports all of it free, so the old readings sit in the same record as the new ones.
- Ask whether your sensors can stay. TemperatureWise can often connect to monitoring hardware already on site, so check before buying new sensors.
- Fit TemperatureWise beside the old system. A mid-sized restaurant takes 30 to 60 minutes, with no electrician and nothing drilled: see how long installation takes.
- Run both for a week. TemperatureWise learns each box's normal pattern in its first week, and you can compare the two side by side.
- Move the alert contacts, then end GlacierGrid at the end of its term. If you want its energy features, those can run alongside.
We read your old data for faults, free. Send the GlacierGrid history and TemperatureWise looks for equipment that is failing now, and for repairs that happened in the past. If you know what a technician actually found, you can check our reading against it.
People leave Therma, now GlacierGrid, because it sells energy services they may not need, and swings the box
GlacierGrid's monitoring still works, and its hub has cellular backup built in. The reasons people look elsewhere are about what the company now sells around it.
- It now sells energy services you may not need. GlacierGrid leads with energy monitoring and demand response, sold on a call, with no published price. A kitchen or cold store that bought a temperature monitor is now the target for a utility program.
- Demand response swings the box, and aggressive swings hurt food. Demand response saves on a utility bill by moving the box's temperature: running it colder before a peak, then letting it drift up while the compressor rests. Done hard and often, those swings damage food. Each warm spell partly thaws frozen product and each cold spell refreezes it into bigger ice crystals, which leaves mushy texture and drip when it thaws. Frozen fruit is the most exposed: at 25°F (-4°C) it still holds liquid water, and until about 10°F (-12°C) molds, yeasts and enzymes can keep working. That is why 0°F (-18°C) is the storage standard.
- The hardware is rented, two sensors minimum. Monitoring is $30 a month for a hub and two sensors, the minimum, and $15 a month for each extra sensor, with the hardware inside the fee. You cannot buy one sensor, and the hardware is never yours.
- The hub wants a network cable. The hub prefers an Ethernet drop to your router, with 4G as backup. A site with no spare port, or a landlord who will not let you touch the rack, is not a clean install.
We make TemperatureWise, and picked each alternative for a reason people leave Therma
Renergy makes TemperatureWise, one of the alternatives on this page, so this is a disclosed guide and not an independent ranking. No vendor paid to be listed. Every alternative had to pass four tests:
- It is sold for commercial cold rooms in the US: restaurants, kitchens, cold stores or plants.
- Operators name it. It comes up in our own research into public threads where owners and technicians talk about monitoring, or it ranks where they search.
- It fixes at least one reason above. The table says which.
- Its facts can be checked. Prices come from the vendor's own pages or a named reseller, checked in September 2026, or the page says there is no posted price. Each product links to our full comparison, where every figure is sourced.
Where TemperatureWise is the wrong pick, the last section says so.
4 Therma alternatives, each the better buy for a different site
Each alternative below fixes at least one reason people leave Therma. TemperatureWise is ours, so it is marked, and it comes first.
| If you want | Go for | Built for | The cons |
|---|---|---|---|
| Only watching, hardware owned | TemperatureWise (ours) | Commercial cold rooms, one site or fifty | It will not cut your energy bill |
| Enterprise monitoring, no energy | SmartSense by Digi | Chains of 50 sites or more | Expensive: an enterprise price, reported at thousands a year |
| Installed, with checklists | Checkit | Operators who want sensors installed and looked after | Locked in for 36 or 48 months, on a quote |
| Owned, many sensor types | Monnit | Plants and breweries tracking many things | Texts cost extra, no built-in phone call, and an alert on every defrost |
TemperatureWise is ours, and it only watches
TemperatureWise does not run your equipment. It watches the whole temperature history and warns of a failing unit at least 4 to 5 days before it fails, and it flags a box whose temperature swings or runs colder than it should, without driving it there.
You buy the hardware once, on Bluetooth (BLE) at $25 a sensor plus a $100 hub, or LoRa at $200 a sensor plus a $250 to $450 gateway, then $250 per sensor per year. One sensor is enough. It uses your internet for free, or cellular at $125 once and $50 a year per location. We put the two side by side in TemperatureWise vs Therma.
SmartSense by Digi is the enterprise monitoring swap
SmartSense by Digi bundles hardware, software, cellular data, NIST recalibration and replacement gear into one fee per asset, with a named manager. It sells monitoring and operations tools, not demand response.
That is an enterprise price: one owner in a public thread called it "thousands per year", and it is not posted. We put the two side by side in TemperatureWise vs SmartSense.
Checkit installs and looks after the sensors
Checkit installs its sensors and folds calibration and replacements into its fee. On its premium tier a staffed centre phones your keyholder list, with a published target of starting the call within five minutes of the alarm. It also sells checklists and a kitchen handheld.
The published minimum term is 36 or 48 months, billed yearly in advance, and the price is a quote. We put the two side by side in TemperatureWise vs Checkit.
Monnit is the platform you buy and run yourself
Monnit is a wireless platform with more than 30 sensor types: temperature, humidity, door, water, CO2, vibration and more. Its Premiere software plan starts at about $45 a year for up to 6 sensors.
Text alerts come from credit packs, about $120 for 1,000, and phone calls need a third-party link. Alerts fire on thresholds. We put the two side by side in TemperatureWise vs Monnit.
Before you leave GlacierGrid, check four things
Rented hardware and an energy product leave more to undo than a plain monitor. Work through these first.
- Ask how the rented hardware goes back. The hub and sensors sit inside the monthly fee. Ask how to return them, and when the last charge falls.
- Find the end of the term. Plan the week of running both for the last weeks of the term.
- Export the history. Download the readings and alert logs, and keep them as long as your rules ask: see how long to keep temperature logs. We do the export with you on the switching call.
- Ask what the energy product did to your setpoints. If demand response or precooling ran on your boxes, ask for the setpoints and schedules it used, and have your refrigeration technician set them back where they belong.
TemperatureWise is not the right Therma alternative for every site
GlacierGrid's monitoring is cheaper per sensor past the two-sensor floor. $180 a year against $250, with the hub in the fee. If you only want a number on a phone and are happy to rent the hardware, its list price wins.
TemperatureWise does not cut your electricity bill. It does not talk to the utility, shed load or precool. If an energy target is the reason you buy, GlacierGrid is the product for that line.
GlacierGrid publishes a longer battery life: typically 10 years or more on the cell it ships, against about 2 years on the TemperatureWise Bluetooth sensor and 5 to 8 years on LoRa.