Updated September 30, 2026 · TariffCue Editorial Team

Optimum vs sim.de

Optimum scores 9.3 and sim.de 8.9 out of 10. Compare their differences and shared features below.

Optimum

9.3/10

Facts checked September 30, 2026.

sim.de

8.9/10

Facts checked September 30, 2026.

Optimum vs sim.de: the differences

Optimum vs sim.de
Compare
Optimum
ReviewSee alternativesSee alternatives
sim.desim.de
ReviewVisitVisit
Top download speed (Mbps)8,000Higher1,000
Price from$30€6.99
Reference plan prices300 Mbps Internet: $30/mo, 300 Mbps, no contract; 500 Mbps Internet: $40/mo, 500 Mbps, no contract; 8 Gig Fiber Internet: $90/mo, 8000 Mbps, no contract25 GB: 6.99 EUR/month, 25 GB, 1 month; 50 GB: 9.99 EUR/month, 50 GB, 24 months; Unlimited on demand: 19.99 EUR/month, unlimited, 24 months
Setup fee$150€49.99
RouterRent up to $14/mo unless you opt outFRITZ!Box 7510, 7630 or 7690, from 4.99 EUR per month, optional
MarketsUSDE
Upload speed (Mbps)Not confirmed5.8 to 40
Mid-contract price risesPrice increases after promo period endsNot confirmed
Exit fee termsNo contracts - cancel without early termination feesNot confirmed
Address checkerNot confirmedhttps://www.sim.de/glasfaser

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Key differences

  • Optimum scores higher overall: 9.3 vs 8.9.
  • Top download speed (Mbps) is higher at Optimum: 8,000 vs 1,000.
  • Founded is lower at Optimum: 1996 vs 2014.
  • Technology: only Optimum offers Cable.
  • Technology: only sim.de offers Fttc.
  • Contract length: only sim.de offers 24.
  • Markets: only Optimum offers US.
  • Markets: only sim.de offers DE.

Our verdict on each

Optimum

Optimum suits US households that want a fast line with no contract attached, and its top plan reaches 8,000 Mbps. What you weigh is the joining cost: a setup fee of $150 and a router that is rented unless you opt out.

Read the full Optimum review

sim.de

sim.de suits people in Germany who want a cheap sim only line with a monthly option and a fixed contract choice on the same tariff sheet. It runs on the 1&1 network, and its entry price of €6.99 sits well under the market median for entry pricing.

Read the full sim.de review

Score breakdown

Optimum vs sim.de
AreaOptimumsim.de
Cost8.6Entry price of $30 looks fair, but Price increases after promo period ends and a $150 setup fee weigh on the total.9.1HigherEntry at €6.99 and unlimited at €19.99 both sit under the site medians of €9.30 and €23.19.
Offer9.8HigherSpeeds of 8,000 Mbps on terms of 1 month, with both cable and fibre available.9.0Sim only, 5G and Esim are available, with included roaming across 33 countries and terms of 1 and 24.
Trust9.8HigherA US operator trading since 1996 under Optimum Communications, Inc., with US as its market.8.4Run by Drillisch Online GmbH since 2014, an mvno on the 1&1 network with support on email, chat and phone.

Positions in our rankings

Optimum vs sim.de
RankingOptimumsim.de
Broadband providers36 of 1247 of 124
Full fibre providers23 of 1076 of 107
Broadband without a long contract15 of 464 of 46

Pick Optimum if, pick sim.de if

Pick Optimum if offer and top download speed (mbps) matter most.

Pick sim.de if cost matter most.

If neither fits

Singtel has top download speed (mbps) at 10,000, against 8,000 for Optimum and 1,000 for sim.de.

Singtel review

Every fact side by side

Optimum vs sim.de
FactOptimumsim.de
TechnologyCable, FttpFttc, Fttp
Contract length11, 24Covers more
Legal entityOptimum Communications, Inc.Drillisch Online GmbH
HeadquartersUnited StatesGermany
Founded1996Lower2014
Support channelsNot confirmedEmail, Chat, Phone, Help centre

Where each stands against the rest

Optimum vs sim.de
FactOptimumsim.deMedian
Top download speed (Mbps)8,000highest quarter1,000at the median1,000
Upload speed (Mbps)Not confirmed5.8 to 40lowest quarter900

Median across 116 listed providers.

Pros and cons

Optimum

Pros

  • No contract: No contracts - cancel without early termination fees, so moving or switching does not cost an early termination charge.
  • Top-end speed: 8,000 Mbps, well above Astound at 5,000 Mbps.
  • Choice of line type: cable and fttp, so cable and fibre both come from one provider.

Cons

  • Setup fee of $150 ranks 86 out of 86 on the site's setup fee table, the expensive end of that list.
  • Rent up to $14/mo unless you opt out adds a monthly equipment cost unless you opt out and bring your own kit.
  • Renewal risk: Price increases after promo period ends, so the figure you pay after the promo period can sit above the $30 entry price.

sim.de

Pros

  • Entry pricing of €6.99 is below the site median of €9.30
  • The Unlimited on demand plan costs €19.99, under the site median unlimited price of €23.19
  • Contract terms run 1 and 24, so a plan can sit on a monthly term or a longer one

Cons

  • The Unlimited on demand plan is tied to the longer of 1 and 24, so unlimited data is not offered on a monthly term
  • Service runs in DE only, so the tariffs are not offered outside that market
  • As an mvno, sim.de sells on the 1&1 network rather than owning it, unlike the network operators getesa, yesss! and Lonestar Cell MTN

Who each suits

Optimum

Who it suits

  • Households that want a very fast line but no long commitment, and would otherwise settle for Astound at 5,000 Mbps.
  • People likely to move or switch provider often, since No contracts - cancel without early termination fees keeps leaving cheap.
  • US households that want one provider for both cable and fibre lines: cable and fttp.

Who should look elsewhere

  • Buyers outside US, who can compare EarthLink instead for fttp, 5G and satellite and a wider choice of ways to connect.
  • Fibre-only buyers, who may prefer Abissnet running fttp across its footprint.
  • Shoppers who want no joining bill, since the $150 setup fee ranks 86 out of 86 and Astound's terms are worth checking first.

sim.de

Who it suits

  • People in DE who want a data heavy sim only line without paying for a handset
  • Travellers from DE who want roaming included and reach across 33 countries
  • Households that want one provider offering both a short monthly term and a longer fixed contract

Who should look elsewhere

  • Buyers outside DE, since the service is a single market
  • People who want a handset bundled with the tariff, as the plans are sim only
  • Buyers who want unlimited data on a rolling monthly basis, since the Unlimited on demand plan sits on the longer of 1 and 24

Country by country

Optimum vs sim.de
CountryOptimumsim.de
United StatesYesNo

Questions about each

Optimum

What does Optimum cost to get started?+

The entry price is $30 a month, the cheapest plan on the list. Installation is a separate setup fee of $150. Budget for both in the first month, because the setup cost does not appear in the monthly price and it sits at the expensive end of the site's setup fee table.

Do I have to sign a contract with Optimum?+

Contract terms apply: No contracts - cancel without early termination fees. Plan terms are listed as 1 month, so the commitment is measured in months rather than years. That makes Optimum a straightforward option if you expect to move home, since leaving does not trigger an early termination charge.

sim.de

How much does a sim.de sim only plan cost to start with?+

The cheapest way in is the entry data plan at €6.99 per month, and it can run on a monthly term rather than a long contract. The larger data plan and the Unlimited on demand plan sit on the longer of 1 and 24 instead.

How much is unlimited data on sim.de?+

The Unlimited on demand plan costs €19.99 per month, and it is tied to the longer of the contract options, 1 and 24. That price sits under the site median unlimited price of €23.19, but the commitment is the part to weigh.

Optimum

Higher score in this comparison

9.3/10See alternatives