Updated September 30, 2026 · TariffCue Editorial Team
100Green vs Engie 2026
100Green vs Engie 2026: the differences
| Compare |  100Green |  Engie 2026 |
|---|---|---|
| Fixed terms | 12 | 12, 24Covers more |
| Exit fee | £0 | €0 |
| Renewable share | 100%Higher | 37.7% |
| Markets | GB | IT |
| Unit rate | Not confirmed | €0.143 to €0.165 |
| Standing charge | Not confirmed | €78 |
| Renewable basis | Ppa | Not confirmed |
| Export rate | £0.12 | Not confirmed |
| Smart meter required | Yes | Not confirmed |
| Regions served | Not confirmed | Italy |
| Customers | Not confirmed | from 1,000,000 |
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Key differences
- 100Green scores higher overall: 9.3 vs 8.8.
- Renewable share is higher at 100Green: 100% vs 37.7%.
- Support channels: only 100Green offers Email.
- Tariff types: only 100Green offers Green, Ev.
- Fixed terms: only Engie 2026 offers 24.
- Markets: only 100Green offers GB.
- Markets: only Engie 2026 offers IT.
Our verdict on each
100Green
100Green suits GB households that want renewable electricity and a free exit fee, with fixed terms set at 12 months and no charge to leave before the term ends. The offer covers both fuels, and the renewable supply sits behind a power purchase agreement.
Engie 2026
Engie 2026 suits Italian households that want a steady rate and an exit fee of €0, so switching away costs nothing. The unit rate of €0.14 to €0.16 ranks 8 of 23, and a customer base of from 1,000,000 gives the supplier scale at home.
Score breakdown
| Area | 100Green | Engie 2026 |
|---|---|---|
| Cost | 9.4HigherExit fees are £0, and the supplier ranks 1 of 29 brands on that measure. | 9.0Unit rate €0.14 to €0.16 ranks 8 of 23; exit fee €0 adds no switching cost. |
| Offer | 9.4HigherTariffs cover fixed, variable and green, a wider set than Octopus Energy at fixed, variable and green or Vattenfall at fixed, green and variable. | 8.6Tariff types fixed, variable and time of use plus electricity and gas and 37.7% renewable give the offer side real weight. |
| Trust | 8.9Trades as Green Energy (UK) Limited and has been trading since 2001, based in GB. | Not confirmed |
Where each is licensed and available
| Country | 100Green | Engie 2026 |
|---|---|---|
| Headquarters | United Kingdom | Italy |
Additional countries for 100Green: 1. Additional countries for Engie 2026: 1.
Positions in our rankings
| Ranking | 100Green | Engie 2026 |
|---|---|---|
| Smart and dynamic electricity tariffs | 8 of 43 | 20 of 43 |
| Energy tariffs without exit fees | 5 of 19 | 13 of 19 |
Sources behind this comparison
100Green
- 100green.com: 13 facts, checked September 30, 2026
Engie 2026
- engie.it: 13 facts, checked September 30, 2026
Every fact side by side
| Fact | 100Green | Engie 2026 |
|---|---|---|
| Tariff types | Fixed, Variable, Green, Ev, Time of useCovers more | Fixed, Variable, Time of use |
| Fuels | Electricity, Gas | Electricity, Gas |
| Legal entity | Green Energy (UK) Limited | ENGIE ITALIA S.p.A. |
| Headquarters | United Kingdom | Italy |
| Founded | 2001 | Not confirmed |
| Support channels | Phone, Email, Chat, Help centreCovers more | Phone, Chat, Help centre |
Where each stands against the rest
| Fact | 100Green | Engie 2026 | Median |
|---|---|---|---|
| Unit rate | Not confirmed | €0.143 to €0.165below the median | €0.17 |
| Standing charge | Not confirmed | €78highest quarter | €14.99 |
| Renewable share | 100%at the median | 37.7%lowest quarter | 100% |
| Export rate | £0.12at the median | Not confirmed | £0.12 |
| Customers | Not confirmed | from 1,000,000above the median | 850,000 |
Median across 58 listed providers.
Pros and cons
100Green
Pros
- Renewable electricity at 100%, with the supply behind it coming from a power purchase agreement.
- Own generation is rewarded: exports are paid at £0.12.
- Both fuels come from one supplier, with electricity and gas covered on the same account.
Cons
- A smart meter is required for the electric vehicle tariff, so meter status decides who can take that plan.
- Fixed terms run for 12 months only, so no longer fixed term is listed for anyone wanting a rate locked for years.
- Supply covers GB only, so a household outside that market has to look elsewhere.
Engie 2026
Pros
- The exit fee is €0, so a fixed term can be ended early with nothing to pay.
- Both fuels are available, electricity and gas, so gas and electricity can sit on one account.
- Tariff choice covers fixed, variable and time of use, including a time-of-use option for households that shift usage through the day.
Cons
- The standing charge of €78 ranks 14 of 16 brands, so the fixed part of every bill is the weak spot.
- The unit rate of €0.14 to €0.16 ranks 8 of 23 brands, which is mid-field rather than a price-led option.
- Coverage is Italy only, so anyone living outside that market has no reason to shortlist it.
Who each suits
100Green
Who it suits
- Households in GB that want renewable electricity and gas from one supplier.
- EV drivers who already have a smart meter or are ready to have one fitted.
- Anyone who may move mid-term and wants a free exit fee.
Who should look elsewhere
- Powerpeers, for a dynamic tariff: 100Green's list is fixed, variable and green, while Powerpeers runs dynamic, fixed and variable.
- Vattenfall, for a household that wants only fixed, green and variable choices, since Vattenfall lists fixed, green and variable without the vehicle and time-of-use options.
Engie 2026
Who it suits
- Households in Italy that want electricity and gas on one account, since electricity and gas lists both.
- Anyone who may move supplier before a term ends, because the exit fee is €0.
- Households that shift usage across the day and want a time-of-use option listed in fixed, variable and time of use.
Who should look elsewhere
- Buyers chasing a dynamic tariff: Powerpeers lists dynamic, fixed and variable, which includes dynamic pricing and is not among fixed, variable and time of use.
- Electric vehicle tariff shoppers: Endesa lists fixed, time of use and ev with an EV option, and Electricity Ratings lists fixed, ev and time of use with EV and prepay.
- Households outside the covered market, where coverage of Italy makes the supplier irrelevant.
Country by country
| Country | 100Green | Engie 2026 |
|---|---|---|
| Italy | No | Yes |
| United Kingdom | Yes | No |
Questions about each
100Green
What does 100Green supply?+
100Green covers both fuels, with electricity and gas available from the same supplier, so a household using both does not need two providers. Renewable supply applies to the electricity side, and gas is bundled into the same account for homes that want one relationship.
Is the electricity genuinely renewable?+
Electricity is listed as 100% renewable, and the basis for that claim is a power purchase agreement. The green offer is tied to contracted renewable generation, which is the part buyers of green tariffs tend to ask about before they switch.
Engie 2026
What does energy cost on an Engie 2026 tariff?+
The unit rate is €0.14 to €0.16 and the standing charge is €78 for the tariff shown. Those two figures drive the bill: the unit rate covers the energy consumed, while the standing charge applies whatever the usage. On the unit rate comparison Engie 2026 sits at 8 of 23.
Is there an exit fee for leaving early?+
No. The exit fee is €0, so ending a fixed term early costs nothing at all. Engie 2026 ranks 1 of 29 brands on that measure, the strongest position among the metrics tracked here, which makes the longer fixed terms far easier to commit to.