Green Mountain Energy vs Rhythm Energy: Texas Electricity Plans Compared

A side-by-side look at both providers' current listed plans, compared on structure and estimated cost — not brand loyalty. Data updated July 20, 2026.

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Estimated costs are informational. Provider rates and plan terms may change. Confirm current details directly with the provider.

Green Mountain Energy and Rhythm Energy occupy the same niche — plans marketed as 100% renewable — from opposite ends of the market. Green Mountain, founded in 1997 and owned by NRG Energy, is the longest-established renewable-focused retail brand in the country. Rhythm is an independent Houston provider that began serving customers in 2021. Comparing them is really a comparison of what the renewable label costs from a legacy brand versus a newer independent.

TrueBill Energy is an independent comparison site, not affiliated with Green Mountain Energy or Rhythm Energy. We don't declare winners: which provider fits you depends on your usage pattern, and catalogs change weekly. See how we make money.

Head to Head, Based on Current Listings

Live inventory from the state plan feed, deduplicated and quality-checked — the same data the compare tool ranks. Updated July 20, 2026. EFL average prices include delivery charges; ranges span plans and delivery territories.

	Green Mountain Energy	Rhythm Energy
Active plans listed	4	3
Avg price range at 500 kWh	16.0–19.0¢	11.0–21.3¢
Avg price range at 1,000 kWh	15.0–18.2¢	7.0–13.9¢
Avg price range at 2,000 kWh	14.5–17.7¢	11.1–14.6¢
Contract lengths (months)	12, 18, 24, 36	12, 24
Fixed-rate plans	Yes	Yes
Variable-rate plans	No	No
Bill-credit plans	None listed	1 of 3 plans
Free nights / time-of-use plans	None listed	None listed
Minimum-usage-fee plans	None listed	None listed
Listed cancellation fees	$150–$395	$20
Delivery territories	All 5 territories	All 5 territories

Every Listed Plan, Side by Side

All publicly listed residential plans from both providers, sorted by cheapest EFL average price at 1,000 kWh.

Provider	Plan	Term	500 kWh	1,000 kWh	2,000 kWh	Notes
Rhythm Energy	Rhythm Max Saver 12	12 mo	19.5–21.3¢	7.0–8.5¢	13.3–14.6¢	$125 credit at 1,000+ kWh
Rhythm Energy	Digital Choice 12	12 mo	11.0–13.0¢	11.0–12.7¢	11.1–12.6¢
Rhythm Energy	Digital Choice 24	24 mo	12.5–14.2¢	12.5–13.9¢	12.6–13.8¢
Green Mountain Energy	Pollution Free e-Plus 18 Choice	18 mo	16.0–18.2¢	15.0–16.9¢	14.5–16.4¢
Green Mountain Energy	Pollution Free e-Plus 12 Choice	12 mo	16.0–18.4¢	15.0–17.4¢	14.5–16.9¢
Green Mountain Energy	Pollution Free e-Plus 24 Choice	24 mo	16.3–18.8¢	15.3–17.8¢	14.8–17.3¢
Green Mountain Energy	Pollution Free e-Plus 36 Choice	36 mo	16.6–19.0¢	15.6–18.2¢	15.1–17.7¢

EFL average prices in cents/kWh, including delivery charges. Ranges reflect different delivery (TDSP) territories. A low 1,000 kWh price on a bill-credit plan does not carry to lower usage levels — check the 500 kWh column. Confirm current rates and terms with the provider before enrolling.

How Green Mountain Energy and Rhythm Energy Differ Structurally

Both providers back their renewable marketing with renewable energy certificates, so the practical differences are price, structure, and fee mechanics. Green Mountain's current listings are one structure — flat fixed-rate Pollution Free plans at four term lengths — priced toward the premium end of our data. Rhythm currently lists genuinely flat Digital Choice plans at noticeably lower average prices, plus a Max Saver bill-credit plan that gets very cheap at 1,000+ kWh and expensive below the threshold. Cancellation fees also differ structurally: Green Mountain's plan documents list flat fees that step up with term length, while Rhythm's list smaller amounts typically charged per month remaining on the contract.

Which May Fit You, Based on Plans Available Today

Green Mountain Energy may be better suited for

Shoppers who specifically want the longest-established renewable-marketed brand and accept a price premium for it
People who want the simplest possible catalog — one flat structure, four term lengths, no thresholds
Anyone who prefers a known flat cancellation fee over a per-month-remaining formula

Rhythm Energy may be better suited for

Cost-conscious renewable shoppers — Rhythm's current listed rates run below Green Mountain's at every standard usage level
Consistently high-usage homes that can exploit the Max Saver credit threshold
People likely to move mid-contract, since a per-month-remaining fee shrinks as the term runs down

Neither provider is the better choice for everyone. Offers rotate weekly, and the structure that wins at 2,000 kWh can lose at 500 kWh — rank both by estimated monthly cost at your own usage before deciding.

Green Mountain Energy vs Rhythm Energy: Common Questions

Is Green Mountain or Rhythm actually greener?

Both market their residential plans as 100% renewable backed by renewable energy certificates, and both homes receive the same physical grid mix. Green Mountain has carried the positioning far longer; Rhythm is the newer entrant. The formal renewable content disclosure for any specific plan is on its EFL — neither brand's marketing changes the electrons at your meter.

Which costs less right now?

Based on active plans available today, Rhythm's listed EFL average prices run below Green Mountain's at 500, 1,000, and 2,000 kWh — the live table above shows the current gap in cents. Catalogs rotate, so treat that as this week's answer rather than a permanent one, and check the compare tool at your own usage.

How do their cancellation fees differ?

Green Mountain's current plan documents list flat early termination fees that rise with term length. Rhythm's list a small dollar amount that is typically charged per month remaining — cheaper to exit near the end of a contract, potentially more expensive to exit early in a long one. The exact structure is in each plan's EFL and Terms of Service.

Does either offer free nights or time-of-use plans?

Not in current public listings — both catalogs are flat-rate (plus Rhythm's bill-credit option). If time-based pricing is what you want, Chariot Energy currently lists the deepest free-nights lineup in our data.

Keep Comparing

Green Mountain Energy plans & rates Rhythm Energy plans & rates All provider comparisons All Texas electricity providers Compare plans at your real usage Plans for 500 kWh homes Plans ranked at 1,000 kWh Plans for 2,000 kWh homes How bill credit plans work How to compare electricity plans

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Estimated costs are informational. Provider rates and plan terms may change. Confirm current details directly with the provider.