Einstein Bros. Bagels is an American bagel and coffee chain.

Einstein Bros. was created by the chain restaurant corporation Boston Chicken (now Boston Market) in 1995, as a way to market breakfast foods. The chain is now owned by Einstein and Noah Corp., a wholly owned subsidiary of Einstein Noah Restaurant Group, Inc.

Boston Chicken, Inc. originally formed the Einstein and Noah Bagel Corporation as Progressive Bagel Concepts, Incorporated (PBCI) in March 1995, when it purchased three retail bagel chains, all located in regions of the United States that did not have longstanding bagel traditions. These companies included Offerdahl's Bagel Gourmet, Incorporated (Fort Lauderdale), Bagel & Bagel, Incorporated (Kansas City), Baltimore Bagel (San Diego), and Brackman Brothers, Incorporated (Salt Lake City). Each found that their stores were similar in that they offered both original and new bagel flavors in rich neighborhoods where the customers had relatively little previous exposure to bagels.

Noah's Bagels was founded by Noah Alper on College Avenue in Berkeley, California. In 1996, the chain of 38 stores was sold to Einstein Bros. for $100 million.

New World Coffee was founded in the early 1990s by Ramin Kamfar, an investment banker who left his finance career to open a coffee shop. It bought Manhattan Bagel out of bankruptcy in 1998. The combined company purchased Washington, D.C.-based Chesapeake Bagel Bakery in 1999 when that chain had 89 stores, giving Manhattan approximately 350 locations.

By 2000, Einstein Bros. was in financial trouble, having loaned too much money to franchisees. After it declared bankruptcy, New World Coffee, which had earlier attempted an unsuccessful hostile takeover, bought the company out of bankruptcy for $190 million.

In 2014, Einstein Noah Restaurant Group was acquired by JAB Holding Company and BDT Capital Partners.