r/caltech
Peer Institution™️. It's spelled Caltech, not CalTech or Cal Tech.
How to think about r/caltech
The community is a hub for students, alumni, and enthusiasts of the California Institute of Technology, focusing on academic life, research, and campus culture. Members share experiences, discuss curricular matters, and engage in topics related to astrophysics and other scientific fields. The distinctiveness of this community lies in its emphasis on the rigorous academic environment and the unique social dynamics of Caltech, often characterized by a blend of humor and intellectual discourse.
Confidence 4/5
Audience
Participants primarily include current students, alumni, and prospective students of Caltech, with a strong focus on STEM fields. The demographic skews towards younger individuals, typically in their late teens to early twenties, who are academically driven and passionate about science and technology. The vibe is generally supportive yet competitive, with members valuing insightful discussions and a shared understanding of the challenges faced in a rigorous academic setting.
Posting culture
The posting culture is characterized by a preference for informative and relevant content, including personal experiences, academic advice, and discussions on research. Posts that are overly promotional or unrelated to the community's focus often receive downvotes. Members tend to engage actively, with a mix of original content and comments, fostering a collaborative atmosphere. The cadence of posting is steady, with members frequently sharing updates and insights.
Brand engagement notes
Brands should approach this community with caution, as members are often resistant to overt promotion and marketing tactics. Authentic engagement is key; brands can contribute by sharing educational content, sponsoring relevant discussions, or supporting community initiatives. Collaborations with student organizations or sponsoring events can also resonate well. However, brands should avoid generic promotional posts, as they are likely to be met with skepticism or disapproval from the community.
Top keywords
What r/caltech talks about
Weighted by how often each term appears in posts and comments, relative to baseline frequency. The largest words are the strongest signals of community focus.
External signals
Where the community looks
Top external domains linked from posts and comments — a quick read on the sources of truth this audience trusts.
Top contributors
Who shapes the conversation
The most active and most-upvoted posters and commenters in this community. Useful when planning outreach or studying a community's tastemakers.
Top posters
By post count
- u/MonkeyLoverAmongUs
- u/[deleted]
- u/NanoscaleHeadache
- u/Olga123Au
- u/nikroskx
- u/literally_mental
- u/NegotiationOk394
- u/Yousefrofa
- u/CG53S
- u/omegabluess
- u/Raitality200
- u/caltechedu
- u/Loose-Show-5633
- u/star07-tete
- u/Little-Operation-743
- u/Remarkable_Newt3149
- u/Ordinary-Till8767
- u/HuntOk4736
- u/mystiverv
- u/nowis3000
- u/twicedouble
- u/Complete-Cloud-7874
- u/crystalwby
- u/GokuBlack455
- u/Small-Two4926
- u/abjectifying
- u/RedQueenTheory12
- u/mechanicDva
- u/mirukitty28
- u/soccerasian21
- u/Daltas
- u/Sea_Top180
- u/eddiet07
- u/LeekRepresentative66
- u/SobolevRegretting
- u/burntclaw
- u/CHOCOLAAAAAAAAAAAATE
- u/braveforthemostpart
- u/Lopsided-Potential63
- u/Slight-Contest-1568
- u/Masterofmyownlomein
- u/mrbeansnumberonefan
- u/ItsUrPalAl
- u/faithforever5
- u/phatface123123
- u/IllustratorLimp4841
- u/arcikavka
- u/Whatupmychild
- u/Tocohs
- u/PenGeek030609
- u/theblueness
- u/Sudden-Inspector-848
- u/Handsome-1
- u/LeastPoint8643
- u/enfzi
- u/travisbickle777
- u/FailureOfaMadChemist
- u/Ok-Chocolate-6431
- u/Pirate_Kiz
- u/TrafficLittle1307
- u/Aditya3103
- u/Fristender
- u/BoardGamesRCool
- u/FonatoFelipe
- u/Dry_University_8194
- u/WarmKrab
- u/Fax215
- u/AdSwimming3275
- u/honestlylost18
- u/WaveKind3997
- u/inquilinekea
- u/Classic_Storm_4463
- u/Sowrrr
- u/Ubantukiller
- u/Snoo91606
- u/Salamander_Short
- u/Spiritual-Sherbert38
- u/bianchitalee
- u/Distinct_Figure_5193
- u/Saniran1
- u/IntManofMystery23
- u/throwaway_acc_092
- u/hypatiaspasia
- u/MechanicalDogtrot
- u/Puzzled-Lab-65
- u/Dependent_Drop_7694
- u/CraeCraeJBean
- u/fluffypumpkin__
- u/jeffh4
- u/mftsb
- u/ALimitingCase
- u/Alternative_Tap_6393
- u/awokendobby
- u/Sure-Career-2053
- u/4a454646
- u/casually_bizzare
- u/ImJustAGirl5555
- u/stoic-human
- u/xXPacotillaXx
- u/VishwasN
By votes
- u/NanoscaleHeadache
- u/literally_mental
- u/Remarkable_Newt3149
- u/Ordinary-Till8767
- u/NegotiationOk394
- u/Yousefrofa
- u/MonkeyLoverAmongUs
- u/HuntOk4736
- u/[deleted]
- u/mystiverv
- u/twicedouble
- u/nowis3000
- u/crystalwby
- u/GokuBlack455
- u/abjectifying
- u/CG53S
- u/Complete-Cloud-7874
- u/Small-Two4926
- u/RedQueenTheory12
- u/omegabluess
- u/mechanicDva
- u/mirukitty28
- u/soccerasian21
- u/Sea_Top180
- u/Lopsided-Potential63
- u/Olga123Au
- u/caltechedu
- u/Daltas
- u/eddiet07
- u/LeekRepresentative66
- u/SobolevRegretting
- u/burntclaw
- u/CHOCOLAAAAAAAAAAAATE
- u/braveforthemostpart
- u/Slight-Contest-1568
- u/Masterofmyownlomein
- u/mrbeansnumberonefan
- u/ItsUrPalAl
- u/IllustratorLimp4841
- u/Sudden-Inspector-848
- u/star07-tete
- u/faithforever5
- u/arcikavka
- u/Whatupmychild
- u/PenGeek030609
- u/theblueness
- u/LeastPoint8643
- u/enfzi
- u/Ok-Chocolate-6431
- u/Loose-Show-5633
- u/phatface123123
- u/Tocohs
- u/Handsome-1
- u/Raitality200
- u/travisbickle777
- u/FailureOfaMadChemist
- u/Pirate_Kiz
- u/TrafficLittle1307
- u/Fristender
- u/Dry_University_8194
- u/AdSwimming3275
- u/nikroskx
- u/Aditya3103
- u/BoardGamesRCool
- u/honestlylost18
- u/WaveKind3997
- u/inquilinekea
- u/Classic_Storm_4463
- u/Spiritual-Sherbert38
- u/Saniran1
- u/FonatoFelipe
- u/WarmKrab
- u/Fax215
- u/Sowrrr
- u/Ubantukiller
- u/Snoo91606
- u/bianchitalee
- u/IntManofMystery23
- u/hypatiaspasia
- u/jeffh4
- u/mftsb
- u/awokendobby
- u/casually_bizzare
- u/Little-Operation-743
- u/Salamander_Short
- u/Distinct_Figure_5193
- u/throwaway_acc_092
- u/MechanicalDogtrot
- u/Puzzled-Lab-65
- u/Dependent_Drop_7694
- u/CraeCraeJBean
- u/fluffypumpkin__
- u/Alternative_Tap_6393
- u/4a454646
- u/Otherwise_Winter207
- u/ALimitingCase
- u/Sure-Career-2053
- u/stoic-human
- u/xXPacotillaXx
- u/VishwasN
Top commenters
By comment count
- u/[deleted]
- u/nowis3000
- u/literally_mental
- u/pialin2
- u/NanoscaleHeadache
- u/racinreaver
- u/Timeroot
- u/Upper-Phase-101
- u/rondiggity
- u/pierquantum
- u/slb18
- u/faithforever5
- u/MegaManMusic_HS
- u/FitzwilliamTDarcy
- u/jeffh4
- u/brand0nh
- u/MonkeyLoverAmongUs
- u/Historical-Ad2656
- u/MikeyNg
- u/anonthingshehe
- u/Appropriate_Option80
- u/activeXray
- u/Smellerific
- u/toybuilder
- u/caltechcyborg
- u/lzyang2000
- u/clothedandnotafraid
- u/LeadershipDowntown
- u/trop-17
- u/lellasone
- u/SpicyRice99
- u/Loose-Show-5633
- u/mystiverv
- u/Infinite_Fan_3929
- u/johnny-T1
- u/mechanicDva
- u/Numerous-Risk373
- u/GokuBlack455
- u/Ill-Tax-1538
- u/Sh4dow101
- u/Remarkable_Newt3149
- u/r1ceIsLife
- u/Key_Lion_5569
- u/venirboy
- u/thesoupchronicles
- u/ybitz
- u/aprimalscream
- u/geli_geli
- u/One-Championship7607
- u/DangTIRED003
- u/1337chameleon
- u/otterbe
- u/Radical_Coyote
- u/sci-punk
- u/collegeanxiety808
- u/Gingy120
- u/dannown
- u/DaRkICe924
- u/Vivid-Pound1171
- u/GKK20
- u/Ubantukiller
- u/cool_innit15
- u/breadhater42
- u/s_p_lee
- u/grilledcactus
- u/darbosaur
- u/Queasy-Improvement34
- u/StellarSunny
- u/nocrashing
- u/Impossible_Ad_4438
- u/omnijeff
- u/msittig
- u/BalinKingOfMoria
- u/SexualPine
- u/zhandragon
- u/Muted_Blueberry_1994
- u/TangerineX
- u/AutoModerator
- u/Little-Operation-743
- u/HeavyZookeepergame94
- u/ihaveadepressinglife
- u/Any-Biscotti-1180
- u/PeaVegetable9026
- u/HappyKateM
- u/fo_ssette
- u/angelinaholm
- u/hosannahope79
- u/Theutates
- u/Harotsa
- u/Fragrant-Hyena8990
- u/DesperateBug
- u/Subject_Asparagus230
- u/PreModernMangoes
- u/PasadenaPup
- u/Distinct_Figure_5193
- u/sarbar02
- u/mrbeansnumberonefan
- u/SaccharineSeal
- u/icymatty
- u/Mission_Tumbleweed70
By votes
- u/nowis3000
- u/[deleted]
- u/pialin2
- u/Timeroot
- u/faithforever5
- u/literally_mental
- u/thesoupchronicles
- u/Poeticspinach
- u/brand0nh
- u/ItsUrPalAl
- u/PreModernMangoes
- u/pierquantum
- u/Sh4dow101
- u/ybitz
- u/trop-17
- u/tilapios
- u/racinreaver
- u/lzyang2000
- u/1337chameleon
- u/breadhater42
- u/Appropriate_Option80
- u/kirbydabear
- u/FitzwilliamTDarcy
- u/geli_geli
- u/rondiggity
- u/MikeyNg
- u/Upper-Phase-101
- u/alblobs
- u/SpicyRice99
- u/LeadershipDowntown
- u/MegaManMusic_HS
- u/mechanicDva
- u/NanoscaleHeadache
- u/maine_root
- u/s_p_lee
- u/TangerineX
- u/Remarkable_Newt3149
- u/aprimalscream
- u/mcfiddish
- u/jeffh4
- u/otterbe
- u/Radical_Coyote
- u/omnijeff
- u/AutoModerator
- u/sarbar02
- u/slb18
- u/physicsurfer
- u/TheRoyalMoCha
- u/Sani_gsbhacks_2021
- u/lellasone
- u/Loose-Show-5633
- u/johnny-T1
- u/StellarSunny
- u/activeXray
- u/CallmeMiner
- u/mystiverv
- u/DaRkICe924
- u/Vivid-Pound1171
- u/msittig
- u/caltechcyborg
- u/braveforthemostpart
- u/abjectifying
- u/turtles_are_weird
- u/r1ceIsLife
- u/Key_Lion_5569
- u/MonkeyLoverAmongUs
- u/grilledcactus
- u/Fragrant-Hyena8990
- u/icymatty
- u/WhyNotWaffles
- u/fluffypumpkin__
- u/de-queue
- u/sci-punk
- u/darbosaur
- u/Historical-Ad2656
- u/anonthingshehe
- u/Theutates
- u/DesperateBug
- u/Subject_Asparagus230
- u/PasadenaPup
- u/Distinct_Figure_5193
- u/Smellerific
- u/SaccharineSeal
- u/LeastPoint8643
- u/fruitcup729again
- u/jo5i4h
- u/clothedandnotafraid
- u/rhombomere
- u/omdeoxyribose
- u/Ancient_Panda359
- u/basketballnumbers
- u/Numerous-Risk373
- u/GokuBlack455
- u/collegeanxiety808
- u/GKK20
- u/Ubantukiller
- u/nocrashing
- u/BalinKingOfMoria
- u/Harotsa
- u/toybuilder
Similar communities
Where this audience also spends time
Topic-adjacent communities surfaced from Reddit's own related subreddit signal.
FAQ
r/caltech — frequently asked questions
Quick facts about this subreddit's size, history, focus, and related communities.
How many subscribers does r/caltech have?
r/caltech has approximately 7,225 subscribers as of May 27, 2026.
When was r/caltech created?
r/caltech was created on July 7, 2010 (16 years ago).
What is r/caltech about?
The community is a hub for students, alumni, and enthusiasts of the California Institute of Technology, focusing on academic life, research, and campus culture. Members share experiences, discuss curricular matters, and engage in topics related to astrophysics and other scientific fields. The distinctiveness of this community lies in its emphasis on the rigorous academic env…
What subreddits are similar to r/caltech?
Communities similar to r/caltech include r/jpl, r/pasadena, r/mit, r/collegeresults, r/stanford.
Who are the most active posters on r/caltech?
The most frequent posters on r/caltech include u/MonkeyLoverAmongUs, u/[deleted], u/NanoscaleHeadache.
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