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swap_horiz K2-3 b Alternatives

Looking for alternatives to K2-3 b? Compare the top Exoplanet options ranked by our AI scoring system.

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K2-3 b

K2-3 b

A super-Earth exoplanet discovered in 2015 by NASA's K2 mission, notable for orbiting a nearby red dwarf star and being a prime candidate for atmospheric characterization.

7.0 Good

apps Top K2-3 b Alternatives

The top alternative to K2-3 b in 2026 is Proxima Centauri b with a score of 9.9/10, followed by LHS 1140 b (8.7) and Kepler-296f (8.3).

1
Proxima Centauri b

Proxima Centauri b

Proxima Centauri b is an exoplanet orbiting Proxima Centauri, the closest star to our Sun. This super-Earth resides with...

Radial Velocity Super Earth Habitable Zone M Dwarf
9.9 Brilliant
2
LHS 1140 b

LHS 1140 b

LHS 1140 b is an exoplanet approximately seven times Earth’s mass, orbiting the M-dwarf star LHS 1140. Its location with...

Transiting Super Earth Habitable Zone Potentially Habitable
8.7 Great
3
Kepler-296f

Kepler-296f

Kepler-296f is a transiting exoplanet categorized as a super-Earth, located approximately 1,000 light-years away. Confir...

Kepler Transiting Super Earth Habitable Zone
8.3 Great
4
Kepler-296e

Kepler-296e

Super-Earth confirmed in 2014 orbiting within the habitable zone of Kepler-296, a red dwarf binary system ~1,200 light-y...

Kepler Transiting Super Earth Habitable Zone
8.2 Great
5
Pi Mensae c

Pi Mensae c

Pi Mensae c is an exoplanet orbiting the G-type main-sequence star Pi Mensae, located approximately 60 light-years from...

Warm Transiting Super Earth G Star
8.2 Great
6
TOI-715 b

TOI-715 b

TOI-715 b is a super-Earth exoplanet discovered by NASA's Transiting Exoplanet Survey Satellite (TESS) through the trans...

Transiting Super Earth Habitable Zone M Dwarf
7.5 Good
7
GJ 1132 b

GJ 1132 b

GJ 1132 b is a transiting rocky exoplanet orbiting a nearby red dwarf approximately 40 light-years from Earth. Announced...

Rocky Transiting Super Earth M Dwarf
7.4 Good
8
K2-3 d

K2-3 d

K2-3 d is a transiting exoplanet orbiting K2-3, a nearby cool M-dwarf star. It was identified from observations by NASA’...

K2 Transiting Super Earth Habitable Zone
7.2 Good
9
L 98-59 c

L 98-59 c

L 98-59 c is a confirmed small planet orbiting the nearby M dwarf L 98-59 and is the second planet in the system's origi...

Warm Transiting Super Earth M Dwarf
7.0 Good
10
L 98-59 d

L 98-59 d

L 98-59 d is a confirmed transiting planet in the compact system around the nearby M dwarf L 98-59. NASA's TESS mission...

Warm Transiting Super Earth M Dwarf
7.0 Good
11
GJ 357 b

GJ 357 b

GJ 357 b is a transiting exoplanet with a radius about 1.2 times Earth's, discovered through NASA's TESS observations of...

Hot Transiting Super Earth M Dwarf
6.8 Fair
12
LHS 1140 c

LHS 1140 c

LHS 1140 c is a transiting planet with a radius about 1.3 times Earth's and an orbital period of roughly 3.8 days. It or...

Warm Transiting Super Earth Multi Planet
6.8 Fair
13
TOI-700 c

TOI-700 c

TOI-700 c is a transiting sub-Neptune exoplanet orbiting the cool red dwarf TOI-700. NASA's Transiting Exoplanet Survey...

Warm Transiting Sub Neptune M Dwarf
6.6 Fair
14
K2-3 c

K2-3 c

K2-3 c is a transiting exoplanet orbiting the cool red dwarf star K2-3, also known as EPIC 201367065. It is classified a...

Warm K2 Transiting Super Earth
6.6 Fair
15
GJ 1132 c

GJ 1132 c

GJ 1132 c is a super-Earth-mass exoplanet associated with GJ 1132, a red dwarf star. It was announced in 2018 as one of...

Warm Transiting Super Earth Multi Planet
6.2 Fair
16
GJ 273 c

GJ 273 c

GJ 273 c is a small exoplanet orbiting GJ 273, also known as Luyten's Star, a nearby red dwarf. It was reported in 2017...

Warm Radial Velocity Super Earth Multi Planet
6.2 Fair
17
GJ 3293 c

GJ 3293 c

GJ 3293 c is an exoplanet detected by measuring the gravitational effect it produces on its host star, the red dwarf GJ...

Warm Radial Velocity Super Earth Multi Planet
6.2 Fair
18
GJ 357 c

GJ 357 c

GJ 357 c is a confirmed exoplanet orbiting the nearby M-dwarf star GJ 357. It is classified as a super-Earth and is non-...

Warm Radial Velocity Super Earth Multi Planet
5.8 Mediocre
19
Kepler-186c

Kepler-186c

Second planet in the five-planet Kepler-186 system, a super-Earth completing an orbit around its M-dwarf every ~7.3 days...

Warm Kepler Transiting Super Earth
5.3 Mediocre
20
Kepler-186d

Kepler-186d

Kepler-186d is the third known planet in the Kepler-186 planetary system, which orbits a cool M-type dwarf star. It comp...

Warm Kepler Transiting Super Earth
5.2 Mediocre

summarize Quick Comparison Summary

Alternative Score vs K2-3 b Action
Proxima Centauri b
Proxima Centauri b
Exoplanet Radial Velocity Super Earth Habitable Zone
9.9 Brilliant +2.9 Compare
LHS 1140 b
LHS 1140 b
Exoplanet Transiting Super Earth Habitable Zone
8.7 Great +1.7 Compare
Kepler-296f
Kepler-296f
Exoplanet Kepler Transiting Super Earth
8.3 Great +1.3 Compare
Kepler-296e
Kepler-296e
Exoplanet Kepler Transiting Super Earth
8.2 Great +1.2 Compare
Pi Mensae c
Pi Mensae c
Exoplanet Warm Transiting Super Earth
8.2 Great +1.2 Compare
TOI-715 b
TOI-715 b
Exoplanet Transiting Super Earth Habitable Zone
7.5 Good +0.5 Compare
GJ 1132 b
GJ 1132 b
Exoplanet Rocky Transiting Super Earth
7.4 Good +0.4 Compare
K2-3 d
K2-3 d
Exoplanet K2 Transiting Super Earth
7.2 Good +0.2 Compare
L 98-59 c
L 98-59 c
Exoplanet Warm Transiting Super Earth
7.0 Good Same Compare
L 98-59 d
L 98-59 d
Exoplanet Warm Transiting Super Earth
7.0 Good Same Compare

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help Frequently Asked Questions

What are the best alternatives to K2-3 b?
The top alternatives to K2-3 b in 2026 include Proxima Centauri b, LHS 1140 b, Kepler-296f, Kepler-296e, Pi Mensae c. Each offers unique features and is objectively scored on Lunoo to help you compare.
How does K2-3 b compare to its competitors?
Our AI-powered comparison system analyzes features, pricing, user reviews, and expert opinions to provide objective scores. K2-3 b scores 7.0/10. Click any alternative above to see a detailed side-by-side comparison.
Is K2-3 b worth it in 2026?
K2-3 b scores 7.0/10 in the Exoplanet category. We recommend comparing it with the 20 alternatives listed above to find the best fit for your needs.
What is the best free alternative to K2-3 b?
Several alternatives to K2-3 b offer free plans or free tiers. Check the alternatives listed above and visit their websites to compare pricing and free options.
Why should I switch from K2-3 b?
Common reasons users look for K2-3 b alternatives include pricing, specific feature gaps, better integration needs, or simply exploring newer options. Our objective scoring helps you compare without bias.
How many alternatives to K2-3 b are there?
Lunoo currently lists 20 scored alternatives to K2-3 b in the Exoplanet category, ranked by our AI-powered evaluation system.
Which K2-3 b alternative has the highest rating?
Proxima Centauri b currently holds the highest rating among K2-3 b alternatives with a score of 9.9/10.
Can I use Proxima Centauri b instead of K2-3 b?
Proxima Centauri b is one of the top-rated alternatives to K2-3 b. While they serve similar purposes in the Exoplanet space, each has distinct strengths. Use our comparison tool above for a detailed side-by-side analysis.
What is the cheapest alternative to K2-3 b?
Pricing varies among K2-3 b alternatives. We recommend checking each alternative's website for current pricing. Many options in the Exoplanet category offer free tiers or competitive pricing.
How are K2-3 b alternatives ranked on Lunoo?
Lunoo uses an AI-powered scoring system that analyzes category fit, feature coverage, pricing signals, public reception, recency, and value to provide 0 to 10 scores. Rankings are updated continuously.
K2-3 b vs Proxima Centauri b: which is better?
K2-3 b scores 7.0/10 while Proxima Centauri b scores 9.9/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
K2-3 b vs LHS 1140 b: which is better?
K2-3 b scores 7.0/10 while LHS 1140 b scores 8.7/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
K2-3 b vs Kepler-296f: which is better?
K2-3 b scores 7.0/10 while Kepler-296f scores 8.3/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.

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