Company	Website	Notes
1st Graded	https://www.1stgraded.com/
AAA	http://www.aaagrading.com	Screw down cases
Ace Grading	https://acegrading.com	Pokemon Grading
ACU-CARD Inc	???
AGS / AdvancedGrading.com	http://advancedgrading.com
All Star Grading	???	Screw down cases
All-Star Grading Co	???
Arena Club	https://arenaclub.com/	Co-founded by Derek Jeter
ASA (Accugrade Sportscard Authentication)	http://www.asa-accugrade.com
ASGA (All Star Grading & Authentication)	https://allstarcerts.com
Authentic Enterprises Inc.	http://rfingers34.com	Rollie Fingers Backed
BCCG (Beckett Collectors Club Grading)	https://www.beckett.com/grading
BCG (Best Card Grading)	???
BGN Collection	http://bgncollection.com	Chinese Grader
BGS (Beckett Grading Service)	https://www.beckett.com/grading
Blue-Chip Sports Co.	???
BRG (Best Rate Grading)	???	Screw down cases
BSGS (Bearstats Grading Services)	http://www.bearstats.com
BSVA	http://bsvagrading.com	Screw down cases
BVG (Beckett Vintage Grading)	https://www.beckett.com/grading
C3 Grading	https://c3grading.com/
Capitol Grading	???
CCS (Card Collector Services)	http://www.ccs-cards.com	Collection Monster?
CEX (Certified Express)	http://www.certifiedexpress.com
CG (Collectors Grade LLC)	https://collectorsgrade.net
CGA (Card Grading Australia)	https://www.cardgradingaustralia.com
CGS (Champs Grading Service)	???
CGS (Cosmic Grading Services)	https://cosmicgrading.com	UK Based
CLG	https://esacard.tripod.com/id6.html	Screw down cases
Compugrade	???	Company Went Under
COR (Cor Grading Servies)	???
CPG (Certified Pro Grading)	???	Can't find Proof
CSA (Certified Sports Authentication)	???	Company Went Under / Oldest Grading Company
CSC (Chamber Sports Card Graded)	???	Screw down cases
CSG (Certified Sports Guaranty)	https://www.csgcards.com
CTA (CTA Grading Experts)	http://www.ctagradingexperts.com
DCI (Dynamic Card Innovation	https://dcigrading.com/
DCS (Dallas Card Show)	https://www.dallascardshow.com/dcs-grading
Degree Grading	https://degreegrading.com/
DGA (Diamond Grading & Authentication)	https://www.diamondauthentic.com/
DSG (Diamond Service Grading)	https://www.dsggrading.com/	Formerly BSG (Best Service Grading)
ECG (Elite Card Grading)	https://www.elitecardgrading.com
ECG (Elite Card Grading) 2	https://www.ecgcard.com
Edge Grading	https://www.edgegrading.com
European Grading	https://www.europeangrading.com/en
FCG (Forensic Card Grading)	https://fcggrading.com/
FGA (Foremost Grading Authority)	???	Company Went Under
FGS (Finest Grading Service)	http://www.finestgrading.com
FIVE Star GRADING	https://fivestargrading.com
Flawless Grading Co	http://www.flawlessgrading.com
GAI (Global Authentication Inc.) (Global Authority)	http://www.gacard.net
GEM (GEM Elite) (Gem Grading Inc.)	http://www.gemgrading.net	http://www.startcollecting.com
GMA Grading	https://gmagrading.com
Golden Grading	https://goldengrading.com
GRA (Graded Rookies Authenticated)	???	Screw down cases
GRAAD	https://www.graad.eu/en/
GRADEMYCARDS.COM	http://grademycards.com	https://grademycards.weebly.com/
Grading Unlimited	???
HGA (Historic Grading & Authentication)	http://www.hgacard.com/
HGA (Hybrid Grading Approach)	https://hybridgrading.com
IGX	???
IKON	???	Screw down cases
ISA (Sports Authentication)	https://www.sportsauthentication.com	https://www.otia.com
KSA (Kressler Sports Authentication)	https://www.ksagrading.com
MAP	http://MAPRated.com	Screw down cases
MGC (Majesty Grading Company)	https://www.majestygrading.com
MGS (Masters Grading Services)	???	Company Went Under
MGS (Mint Grading Service)	http://www.mintgrading.com	Company Went Under
MNT	https://mntgrading.com	Canadian Grader
NASA (North American Sportscard Authentication)	http://cybcity.com/nasa	Screw down cases
Next Level Grades	https://nextlevelgrades.com/
PCA (Professional Cards Authenticator)	https://pcagrade.com/en/	European Grader
PCCG (Pro's Choice Card Graders)	???	Company Went Under
PCG (Pocket Card Grading)	https://www.facebook.com/PocketCardGrading
PCG (Premier Card Grading)	https://premiercardgrading.com	Mostly Alternative Type Cards
PCG (Professional Card Graders)	http://www.cardgraders.com	Company Went Under
PG Grading (Pokegrade)	https://www.pokegradeuk.co.uk/	Based in UK
PGA (Professional Grading Authority)	???	Maybe still grading?
PGC (Premier Grading Company)	http://www.premier-grading.com	http://pgc.iwarp.com/
PGC (Pro Grade Certified)	http://prograding.com	Company Went Under
PGI (Pristine Grading International)	https://pgigrading.com
PGS (Platin Grading Service)	https://platin-grading.de/en/	German Grading Service
PGS (Professional Grading Service)	http://pgsgrading.com	Redirects to http://igsgrading.com/
Philly Sports Shop	http://phillysportsshop.com
Player 1 Services	https://www.playeroneservices.com/
PRE-Grading Service (uses screwdowns)	???	Can't find Proof
Prime Sports Grading	???	Company Went Under
PRO (Pro Sports Grading)	http://www.prograding.net	Trimmed Cards Being Graded :(
PRO Choice Grading	???	Screw down cases
PSA (Professional Sports Authenticator)	https://www.psacard.com/services/tradingcardgrading
PSG (Premium Sports Grading)	???	Premium
PSG (Pristine Sportscard Grading)	???	Can't find Proof
PTG Grading Service	???
Pure Graded X	https://puregradedx.com/	Carsyn Cruz
RCG (Revolution Card Grading)	https://revolutiongrading.com/
RGA (Retro Grading Authentication)	http://rgagrading.com
SBC (Superlative Baseball Card Certification)	???	One of the Original Grading Companies
SCD (Sports Cards Direct)	???
SCD (Sports Collectors Digest)	https://sportscollectorsdigest.com/cards/grading-cards
SGC (Sportscard Guaranty)	https://gosgc.com
SMA (Sports Memorabilia Authenticator)	???
Snaggle Tooth	http://snaggletoothgrading.com	Company Went Under
SPA (Supreme Product Authentication)	???
SVCG (Southern Values Card Grading)	https://www.southernvaluescardgrading.com/
SWG (Sports World Grading)	http://sportsworldgrading.com
TAG Grading (Technical Authentication & Grading)	https://taggrading.com	High-end AI Grading
TFA (The Final Authority)	http://www.tfagrading.com
TGA (The Grading Authority)	https://thegradingauthority.com
TGT (Transparent Grading Team)	http://www.transparentgradingteam.com
USA (Ultimate Sportscard Authority)	http://usasportscards.com	Company Went Under
Vault Authentics	https://vaultauthentics.com/
Verisleeve	http://www.verisleeve.com	Sticker on Card Saver
VGS	???
VSA (VS Autographs)	https://vsautographs.com
WCG (World Class Grading)	http://www.worldclassgrading.com