OpenSense vs Testo / Sensorpush / Eupry
An honest comparison written by the OpenSense team
There are three reference points buyers compare us to. We respect each of them; the goal of this page is to tell you when to pick them over us, and when to pick us.
This page is opinionated. Every vendor's marketing claims something; the comparison below is from our own dogfooding of their kits and from talking to small EU food businesses about why they switched.
At a glance
| Concern | OpenSense | Testo Saveris | SensorPush | Eupry |
|---|---|---|---|---|
| Primary segment | small EU operators | mid-large food / pharma | hobby + small biz | EU pharma / labs |
| Hardware ownership | bring your own | Testo-only | SensorPush-only | Eupry-only |
| Hardware capex (3 sensors) | €60–€90 | €600–€1100 | €170–€220 | €1200–€1800 |
| Per-site SaaS | €29 / mo | €30–€80 / mo subscription | €0–€10 / mo (cloud) | included in capex |
| HACCP PDF report | yes, free | yes | manual export | yes |
| Legionella support | yes (vertical) | partial (cold-chain bias) | no | partial |
| Cold-chain calibration cert | bring your own probe | ISO 17025 included | none | ISO 17025 included |
| LoRaWAN integration | yes (TTN webhook) | proprietary radio | no | proprietary radio |
| Open API | yes | partial (paid tier) | yes (well documented) | no |
| Vendor lock-in | none (raw export) | high | moderate | high |
| EU data residency | yes (Hetzner DE) | yes | US | yes (DK) |
| Self-serve onboarding | yes | sales-led | yes | sales-led |
Where Testo wins
Testo is the European gold standard for regulated cold chain, full stop. Buy Testo if:
- You are a pharmaceutical distributor with GxP obligations and a qualified auditor will reject anything without ISO 17025 calibrated probes shipped with paperwork.
- You need a single throat to choke. Testo will sell you sensor + cloud + calibration + audit-time consulting as a package.
- You are mid-to-large (50+ sensors per site) and the budget is annual six figures.
- You have a procurement department that prefers a known brand to a cheaper unknown.
We are not Testo. We do not run an ISO 17025 calibration lab. We do not have a sales team that comes to your site. We do not have a Testo-style qualification dossier.
Where SensorPush wins
SensorPush is the right answer for the single hobbyist or one-fridge small operator who does not care about a SaaS subscription and is fine to live inside SensorPush's app.
Buy SensorPush if:
- You have one or two sensors, total.
- You like the app's chart and do not need PDF reports.
- You do not need multi-user access, audit-trail evidence, or LoRaWAN.
- You speak English natively and have no localization need.
SensorPush is excellent at the "one cigar humidor / one wine fridge" class of problem. The cloud is free at that scale. We are not trying to compete in that segment.
Where Eupry wins
Eupry is the EU pharma / lab product. If you are a hospital pharmacy, a small biotech wet-lab, or a vaccine clinic, Eupry has specifically built for your auditor.
Buy Eupry if:
- You are GxP / GLP / GDP regulated.
- You want ISO 17025 calibration certificates per probe.
- You are happy with a Danish vendor and Danish data residency.
- You can afford the higher capex.
We are not GxP. We are HACCP-and-equivalent for food and Legionella.
Where OpenSense wins
We are the hardware-agnostic, EU-residency, self-serve, regulator- appropriate option for the small operator (1–10 sensors per site, food / hot-water / IT-closet / climate / energy). Specifically:
- Capex. A Shelly H&T is €30. Three of them and a free trial is under €100 to validate the entire workflow. Testo or Eupry start at 10× that. You do not have to commit before you know it works for you.
- No vendor lock-in. You can leave us, take your CSVs, and route the same Shelly to a different SaaS or to your own database. Our audit trail is verifiable externally (see audit trail).
- Five verticals from one backend. Testo has a cold-chain product and a separate building-monitoring product. Eupry is pharma-shaped. We cover food + Legionella + server-room + climate + energy out of the box.
- EU-first, self-serve. Slovak, Czech, German operators do not need a US-headquartered vendor's quirks (US time zones, English-only support, USD pricing, USA Cloud Act exposure).
Where we are not as good
We are honest about it:
- No first-party calibration. Bring your own calibrated probe if you need traceability. We do not ship calibration certificates.
- No 24/7 phone support. Email + Telegram, business hours (Europe/Bratislava). Enterprise tier will add a phone line.
- No SOC 2 / ISO 27001. Coming, but not today.
- One-person operation. We are honest about that. If your purchasing policy says "vendor must have 50+ employees", we are not yet your vendor.
If you find yourself ticking many of those boxes, buy Testo or Eupry. We are happy to be a tier-2 redundancy logger next to them; the API will ingest from any Shelly / Aqara / ESP32 alongside the regulated probe.
Migrating to us from another tool
We have written migration paths for the most-common cases:
- From SensorPush: export CSV, we provide an importer that maps to channels.
- From Testo Saveris: export from the Saveris cloud, run the same importer.
- From Eupry: we have not migrated a customer from Eupry yet; please contact us if you are the first.
- From paper logbook: see the HACCP vertical guide.