Ostrom is a Berlin-based provider of green electricity whose SimplyDynamic tariff follows hourly exchange prices. It sells no appliances of its own, but its app can steer connected EV chargers, heat pumps, air conditioners, thermostats, inverters and batteries toward cheaper hours, and Homey and a developer API are available for outside use.
Ostrom works through its own cloud and your smart meter. The Ostrom app talks to device makers' services (for an EV, you sign in with the car maker's account), so there is no hub and no local connection. Prices and smart meter data come from Ostrom, and optimisation happens in the app.
That suits households with a smart meter who want an EV, heat pump or battery to run in cheap hours with little effort. It is weaker for voice control and for the big open platforms: we found no Google Home, Alexa, Apple Home or built-in Home Assistant integration, and Home Assistant and evcc support could not be confirmed.
Connection
Ostrom's cloud and your smart meter
Voice assistants
Not found
Matter
Not found
Open platforms
Official Homey app and a developer API
What can be connected
EV charging Electric cars and wallboxes from many brands, including Tesla, BMW, Volkswagen, Zaptec, go-e, myenergi and Easee
Heating and cooling Heat pumps, air conditioners and smart thermostats from brands such as NIBE, Vaillant, Viessmann, Daikin and tado
Solar and storage Inverters, home batteries and energy meters from brands such as SMA, Fronius, SolarEdge, Huawei and Tesla Powerwall
The one official app, published by Ostrom GmbH. It covers meter readings, monthly payments, invoices, support chat and CO2 savings. With a dynamic tariff it also adds smart EV charging and control of heat pumps, air conditioners and thermostats, and it mentions linking inverters and batteries. The App Store listing says the developer sees the device integrations as a first step that still needs improvement.
Official supported by the brandCommunity built by someone elseNot found searched, nothing foundUnconfirmed sources conflict or could not be opened
Platform
Status
What it means
Sources
Connection
Cloud and smart meter
Yes
Ostrom's SimplyDynamic tariff needs a smart meter, meaning a digital meter with a communication gateway that sends consumption data to Ostrom. Ostrom helps customers apply for one. Devices are added in the Ostrom app, and for an EV the app asks you to sign in with the vehicle maker's account.
Ostrom's smart home page names heat pump, air conditioner, thermostat, inverter, battery, meter and EV charger brands it works with, and says it controls them through the app. Its dynamic tariff page cites more than 1,400 compatible devices. Ostrom's NeoGrid AI virtual power plant controls the wallbox rather than the car and lists Audi, BMW, Tesla, Volkswagen and other makes directly, with others working via a wallbox. It reports Stellantis and Polestar as not supported.
Ostrom announced a package with the Zaptec wallbox in April 2023, using smart meter data to time charging. In April 2024 E3/DC announced it was building Ostrom's dynamic tariff into its home power plant energy management.
Ostrom has an official app for Homey, announced by Homey. It brings dynamic electricity prices into Homey Flows and Advanced Flows, for example to shift EV charging or appliances to cheaper hours. Homey lists Homey Cloud, Homey Pro, Homey Pro mini and Homey Self-Hosted Server as compatible, and requires an active SimplyDynamic plan with a smart meter and an Ostrom login. Homey's article does not mention Homey Bridge. Ostrom's own store page lists Homey Bridge among hubs without saying which one the connection needs.
Ostrom runs a developer portal at docs.ostrom-api.io with sandbox and production environments, OAuth2 client credentials and a REST design, for partners and customers. Ostrom's partner page describes it as open APIs to access Ostrom data. We could not open the portal itself, so the available endpoints beyond authentication are unconfirmed.
No built-in Ostrom integration or community add-on turned up in our searches. Home Assistant's integration list could only be read in part, so this is unconfirmed.
Searched, no source
evcc
Unconfirmed
evcc's dynamic prices page names Tibber and aWATTar as examples and does not mention Ostrom. Its full tariff list could not be opened, so support is unconfirmed.
No Ostrom service found, but IFTTT's own site was not searched directly.
Searched, no source
Checked 11 November 2026 against the brand's own pages, app store listings and each project's own page. “Not found” means we searched and found nothing, not that it is impossible. Compatibility changes often. Spot an error? Tell us and we will fix it.
Common questions about Ostrom
Does Ostrom support Matter?
Not that we could find. No Ostrom announcement or Matter support found when we searched.
Does Ostrom work with Alexa?
Not that we could find. No integration found in Ostrom's pages or in our searches. Ostrom's smart home page says its store sells smart speakers but does not name any.
Does Ostrom work with Google Home?
Not that we could find. No integration found in Ostrom's app pages, store or partner pages, or in our searches.
Does Ostrom work with Apple Home (HomeKit)?
Not that we could find. No HomeKit support or Apple Home mention found.
Does Ostrom work with Home Assistant?
Unconfirmed. No built-in Ostrom integration or community add-on turned up in our searches. Home Assistant's integration list could only be read in part, so this is unconfirmed.
Does Ostrom work with SmartThings?
Not that we could find. No integration found in our searches.
Does Ostrom work with Homey?
Yes, officially. Ostrom has an official app for Homey, announced by Homey. It brings dynamic electricity prices into Homey Flows and Advanced Flows, for example to shift EV charging or appliances to cheaper hours. Homey lists Homey Cloud, Homey Pro, Homey Pro mini and Homey Self-Hosted Server as compatible, and requires an active SimplyDynamic plan with a smart meter and an Ostrom login. Homey's article does not mention Homey Bridge. Ostrom's own store page lists Homey Bridge among hubs without saying which one the connection needs.
Does Ostrom work with Hubitat?
Not that we could find. No driver found.
Answers come from the sourced table above. See how Ostrom compares with all brands on the smart home brand statistics page.