Updated September 30, 2026 · TariffCue Editorial Team
Ostrom vs Rabot Energy
What sets them apart
| Compare |  Ostrom |  Rabot Energy |
|---|---|---|
| Fixed terms | 12, 24Covers more | 12 |
| Standing charge | €6Lower | €15 |
| Smart meter required | YesHas it | No |
| Customers | 100,000 | 200,000Higher |
| Exit fee | Not confirmed | €0 |
| Unit rate | Not confirmed | €0.27 |
Same on both: Renewable share (100%), Renewable basis (Certificates), Markets (DE).
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Key differences
- Standing charge is lower at Ostrom: €6 vs €15.
- Smart meter required: only Ostrom.
- Customers is higher at Rabot Energy: 200,000 vs 100,000.
- Support channels: only Ostrom offers Chat.
- Support channels: only Rabot Energy offers Email, Phone.
- Tariff types: only Ostrom offers Variable.
- Fixed terms: only Ostrom offers 24.
Our verdict on each
Ostrom
Ostrom suits households in its home market that want choice, with 100% renewable electricity, fixed terms of 12 and 24 and a variable option in the same account. The trade-off is support, which runs on chat and help centre, and a footprint of DE.
Rabot Energy
Rabot Energy is a German electricity-only supplier for households that want a green tariff with a full year of fixed pricing and nothing to pay for leaving. It charges a unit rate of €0.27 and a standing charge of €15, and support runs on email, phone and help centre.
Score breakdown
| Area | Ostrom | Rabot Energy |
|---|---|---|
| Cost | 9.5HigherStanding charge of €6 and a rank of 4 among 16 brands, which keeps the fixed side of the bill competitive. | 9.0Exit fee of €0 plus a unit rate of €0.27 and a standing charge of €15 carry the cost side. |
| Offer | 8.8Highervariable, fixed and dynamic sit alongside 12 and 24 fixed terms, so price style and commitment length can be chosen together. | 8.7Tariff types of dynamic, fixed and ev and green supply of 100% on a certificates basis drive the offer side. |
| Trust | 8.1A named legal entity in Ostrom GmbH, founded in 2021, with support running on chat and help centre. | Not confirmed |
How the counts compare
| Fact | Ostrom | Rabot Energy |
|---|---|---|
| Standing charge | €6 | €15 |
| Renewable share | 100% | 100% |
| Customers | 100,000 | 200,000 |
Which one suits you
Pick Ostrom if cost, fixed terms, standing charge, and smart meter required matter most.
Pick Rabot Energy if customers matter most.
Sources behind this comparison
Ostrom
- ostrom.de: 13 facts, checked September 30, 2026
Rabot Energy
- rabot.energy: 14 facts, checked September 30, 2026
How they place
| Ranking | Ostrom | Rabot Energy |
|---|---|---|
| Energy suppliers | 36 of 96 | 37 of 96 |
| Green energy suppliers | 21 of 56 | 22 of 56 |
| Smart and dynamic electricity tariffs | 18 of 43 | 19 of 43 |
Every fact side by side
| Fact | Ostrom | Rabot Energy |
|---|---|---|
| Tariff types | Variable, Fixed, Dynamic, Ev, GreenCovers more | Dynamic, Fixed, Ev, Green |
| Fuels | Electricity | Electricity |
| Legal entity | Ostrom GmbH | RABOT Energy DE GmbH |
| Headquarters | Germany | Germany |
| Founded | 2021 | Not confirmed |
| Support channels | Chat, Help centre | Email, Phone, Help centre |
Where each stands against the rest
| Fact | Ostrom | Rabot Energy | Median |
|---|---|---|---|
| Exit fee | Not confirmed | €0at the median | €0 |
| Unit rate | Not confirmed | €0.27above the median | €0.17 |
| Standing charge | €6below the median | €15above the median | €14.99 |
| Renewable share | 100%at the median | 100%at the median | 100% |
| Customers | 100,000lowest quarter | 200,000below the median | 850,000 |
Median across 58 listed providers.
Pros and cons
Ostrom
Pros
- Broad choice under one account: variable, fixed and dynamic, against the shorter lists at Endesa (fixed, time of use and ev) and Powerpeers (dynamic, fixed and variable).
- A low standing charge of €6, with a rank of 4 among 16 on that measure.
- Renewable supply at 100%, with the renewable basis set as certificates.
Cons
- Support runs on chat and help centre, so anyone who needs a phone line has fewer routes to reach a person.
- Dynamic pricing asks for a smart meter to be in place, so a home that has none fitted is left choosing among the fixed, variable, green and EV tariffs in variable, fixed and dynamic.
- The fuels listed are electricity, so a household running gas as well needs a second supplier.
Rabot Energy
Pros
- An exit fee of €0 places Rabot Energy at 1 of 29 brands ranked on that measure, the strongest of its three placements.
- Green supply of 100% on a certificates basis, and a smart meter is not required, so the green option needs no new meter.
- Tariff types run dynamic, fixed and ev, putting fixed, dynamic, EV and green with a single supplier.
Cons
- A unit rate of €0.27 ranks 14 of 23 brands on that measure, so Rabot Energy is not the cheapest per unit here.
- The standing charge of €15 ranks 9 of 16, and it lands on the bill whatever you consume.
- Supply is electricity only, electricity, so a household that also holds a gas contract needs a second supplier.
Who each suits
Ostrom
Who it suits
- Households that want to pick between variable, fixed and dynamic pricing without moving supplier, given the range in variable, fixed and dynamic.
- EV owners who want a dedicated tariff in the same account as their everyday rate, listed in variable, fixed and dynamic.
- Green electricity buyers content with certificates as the basis, which is how the label is set at certificates.
Who should look elsewhere
- Shoppers after time-of-use or prepay options, who can compare electricity-ratings at fixed, ev and time of use.
- Readers who want a simpler shortlist, since Powerpeers lists dynamic, fixed and variable against the wider Ostrom range of variable, fixed and dynamic.
- Anyone settled on fixed, time-of-use and EV tariffs only, who may prefer the narrower Endesa set of fixed, time of use and ev.
Rabot Energy
Who it suits
- Households in DE that want a green electricity tariff with a full year of fixed pricing and no exit fee.
- Drivers and EV owners, since dynamic, fixed and ev includes an EV tariff alongside fixed and dynamic.
- People who would rather not arrange new metering: a smart meter is not required.
Who should look elsewhere
- Anyone set on a variable tariff: Powerpeers lists dynamic, fixed and variable, and variable pricing is not in Rabot Energy's dynamic, fixed and ev.
- Households that want prepay or time-of-use pricing, both of which appear in fixed, ev and time of use.
- Buyers shopping mainly on the price per unit, given the mid-table position at 14 of 23.
Country by country
| Country | Ostrom | Rabot Energy |
|---|---|---|
| Germany | Yes | Yes |
Questions about each
Ostrom
How much is the Ostrom standing charge?+
The published standing charge is €6, and Ostrom sits at 4 on that measure among 16 brands tracked. For a household using little power, the standing charge carries more of the bill than the unit rate, so it is worth weighing before a fixed tariff is signed.
Does Ostrom sell a dynamic tariff?+
Yes, dynamic pricing is part of variable, fixed and dynamic, and a smart meter is required to sit on it. A home that has yet to fit a meter is limited to the other tariffs in the range, and anyone hoping to shift usage into cheaper hours will not get that chance until the meter is in place.
Rabot Energy
What does Rabot Energy charge for electricity?+
Rabot Energy's published figures are a unit rate of €0.27 and a standing charge of €15, with an exit fee of €0. The unit rate covers the power you actually consume, while the standing charge is a fixed cost for holding a connection at all. Budget with both figures side by side.
Is there an exit fee if I switch away from Rabot Energy?+
The exit fee is €0, so there is nothing to pay for ending the contract early, and that is the measure on which Rabot Energy sits at 1 of 29 brands. A free exit also suits renters and anyone who expects to move house during the term.