The most influential and powerful wine critic in the world, Robert Parker gained recognition in the years following the first publication of The Wine Advocate. Today he has tasted a large part of the world's most expensive and prestigious wines and rated these on his 100 point wine-scoring scale.

The scale employs a 50-100 point quality scale ranging from unacceptable to extraordinary.

Stephen Tanzer is a US-based, widely respected wine critic, editor and publisher of international Wine Cellar and wine columnist for Forbes, and Food & Wine. Tanzer has a particular expertise on the wines of Burgundy, Piemonte, California, Washington State, South Africa and Bordeaux.

He employs a modern wine rating system on a 70-100 point quality scale.

Founded in 1979, Wine Enthusiast is a magazine and website, that is now a world leading guide to the latest wine trends, wine ratings, education, food, travel, and everything needed to enjoy wine to the fullest. The magazine is published 14 times per year and has a readership of 800,000 consumers worldwide.

Wine Enthusiast's 100-point wine-scoring scale:

Vinous' CEO and founder and one of the world's top wine critics. From 2006 to 2013 Galloni reviewed wines at Robert Parker;s The Wine Advocate, where he covered the wines of Italy, California, Burgundy and Champagne.

Antonio Galloni's 100-point wine-scoring scale:

James Halliday is an Australian wine writer and critic. During his nearly 40-year career of judging and tasting wines in Australia's most important wine competitions, J. Halliday has written more than 40 books on wine and is recognized as an authority of wine.

Halliday uses a 100-point wine-scoring system:

Decanter is a British high-end magazine on wine and spirits published on a monthly basis. It specializes in wine industry and vintage news, wine recommendations and reviews. Decanter organizes annual international wine competition 'The Decanter World Wine Awards'.

Decanter has a scoring scale based on a five-star system:

James Suckling - an American wine critic and journalist, who is internationally known as one of the world's most influential wine critics. J. Suckling was working for Wine Spectator before creating his own website (JamesSuckling.com) and is mainly known for his specialization in the wines of Italy and Bordeaux.

James Suckling's 100-point wine-scoring scale:

Jancis Robinson - one of the world's leading wine journalists and critics, who writes daily for JancisRobinson.com and weekly for the Financial Times. J.Robinson is also a co-author of Wine Grapes, a complete guide to 1,368 vine varieties and an advisor for the wine cellar of Queen Elizabeth II.

Jancis Robinson's 20-point wine scoring scale: