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The Orthodox Union is the largest and most widely recognized kosher certification agency in the world, certifying over 1 million products in 100+ countries. Established in 1923, OU Kosher is known for its rigorous standards and comprehensive supervision.

OK Kosher is one of the world's leading kosher certification agencies, with a global network of rabbis and mashgichim. Known for innovation in kosher law application and strict adherence to Lubavitch standards.

The Chicago Rabbinical Council is a major kashrus certifying agency known for its comprehensive supervision and highly regarded standards across the United States.

Star-K is a leading kosher certification agency based in Baltimore, Maryland. Known for its expertise in complex manufacturing processes, Star-K provides comprehensive certification services worldwide.

Kof-K Kosher Supervision is one of the leading kosher certifying agencies in the United States, headquartered in Teaneck, New Jersey. Known for its accessibility and consumer-friendly approach to kosher certification.

Kosher Miami (KM) is the primary kosher certification agency for the South Florida region, supervising restaurants and food businesses throughout the Miami metro area with high standards.

KSA (Kosher Supervision of America) is a well-established kosher certifying agency based in Los Angeles, California, serving manufacturers and food businesses across the West Coast and beyond.

MK Kosher is the main certification for the Montreal Jewish community. While widely used in Canada, it may not be accepted by all Orthodox communities. Consult with your rabbi.