When Numismatic Guaranty Company (NGC) was founded in 1987, it heralded the introduction of a new standard of integrity in coin grading. From the beginning, NGC has remained focused on grading collectible coins, tokens and medals accurately, consistently and impartially. As the company has grown to become the leading and largest third-party coin grading service, it has maintained a steadfast and uncompromising commitment to these ideals.
The knowledge, integrity and dedication of NGC's team of numismatic professionals ensure a level of grading consistency unparalleled among grading services. This record of consistency, built over the years, has helped to foster greater stability throughout the collectible coin marketplace.
NGC is the official grading service of the American Numismatic Association (ANA) and the Professional Numismatists Guild (PNG).
Founded in February 2001, Numismatic Conservation Services (NCS) is devoted to expert conservation of collectible coins, tokens and medals. NCS numismatic professionals have extensive experience in coin conservation techniques and are uniquely qualified to provide expert conservation services for coins of all metals, types and eras.
NCS conservation carefully removes surface contaminants such as PVC, soils, tarnish, carbon spots, verdigris and encrustation from coins. These conservation services are designed to preserve originality, improve eye appeal and provide long-term protection.
NCS is the conservation service of choice for the ANA and PNG.
In 2005, the founding of Paper Money Guaranty (PMG) established a new standard of integrity in the note-grading industry. Since then, PMG has been dedicated to upholding the highest standards of consistent and accurate grading. Today it is the world’s largest and most comprehensive third-party paper money grading service.
Thanks to proven processes, standards and expertise, PMG is proud to be the world’s most trusted and preferred paper money grading service.
PMG is the official paper money grading service of the ANA and PNG.
Founded in 2000, Certified Guaranty Company (CGC) revolutionized comic book collecting with accurate and impartial grading and state-of-the-art protective holders. Today, no other third-party grading service compares to CCG when it comes to the certification of pop culture-related collectibles, including magazines, trading card games, sports cards, video games, home video, concert posters and more.
CGC Cards is the division of CGC devoted to grading TCGs, sports cards and non-sports cards. More than any other card grading service, CGC cards uses advanced authentication and grading technology to make the certification process faster and more precise, while maintaining affordable prices.
In 2022, CGC launched CGC Video Games, which is dedicated to expert and impartial video game grading. On a quest to document, protect and preserve the legacy of video games, CGC Video Games is here to level up the video game collecting hobby.
In 2023, CGC launched CGC Home Video, to provide expert grading of VHS and Betamax Videocassettes. The division is already revolutionizing home video collecting the way the VCR revolutionized at-home movie watching
Authenticated Stamp Guaranty (ASG), a third-party authentication, grading and encapsulation service for collectible stamps, was started in 2017. ASG replicates many of the proven practices that have been developed by NGC, PMG and CGC.
A stamp determined to be genuine by ASG is graded according to a 100-point scale. It is then encapsulated with an attractive ASG certification label in a secure, high-quality holder. A proprietary system and extensive security measures tracks stamps at every stage of the grading process.