CGC - Accurate, consistent and impartial grading from CGC has made the hobby safer, more transparent and more vibrant. Collectors and dealers trust that any collectible graded by CGC has been authenticated, checked for restoration and graded according to widely accepted standards by multiple professionals. They also know that it has been encapsulated in a tamper-evident holder designed for long-term preservation.
PSA - PSA is a grading services company headquartered in Santa Ana, CA, founded in 1991.