Allbirds is an American public benefit company originating in New Zealand that sells footwear and apparel, co-founded in 2015 by Tim Brown and Joey Zwillinger. The company is headquartered in San Francisco, and is known for their minimalist designs, association with environmental, social, and governance (ESG) principles, and Silicon Valley. Its business model has primarily relied on direct-to-consumer commerce through its website and brick and mortar stores, although the company had begun to decrease its brick and mortar presence by 2023.

Allbirds was founded through an initial fundraising of US$119,000 on Kickstarter and has based its corporate identity on sustainability. Since the 2020s, the company has been criticized by legal scholars for greenwashing after a case about their reporting of carbon offsets was dismissed. Allbirds went public on November 3, 2021, but experienced poor sales soon afterwards; executive turnover followed the company through the end of 2024. On April 8, 2024, the company received a non-compliance notice from Nasdaq for performing below $1 for over 30 consecutive days.

During the mid-to-late 2010s, they became a fad among tech workers in major American cities and were worn by Barack Obama and Leonardo DiCaprio.

Tim Brown, co-founder of Allbirds, first began making shoes for his friends while enrolled in business school. In 2014, amidst declining demand for Merino wool in New Zealand due to the rise of recycled polypropylene and a lack of industry representation, he secured a grant from New Zealand's wool industry. Brown launched his idea on Kickstarter, raising $119,000 in five days. After the 2014 Kickstarter launch, he began to work with Joey Zwillinger in 2015, a biotechology engineer who had sold algae fuel. They then launched Allbirds' Wool Runner in March 2016. The name "Allbirds" references New Zealand's lack of native land mammals, making it a land of "all birds".

The company began with the Wool Runners casual sneakers. During its first year in business, Allbirds raised $7.25M from investors who included Maveron and Lerer Hippeau Ventures. Articles in publications such as Time and The New York Times were described as the company "having a good publicist" by Jordyn Holman and Matthew Townsend of Bloomberg News.

By the end of 2017, Allbirds expanded across the United States and into South Korea and Australia. In October 2018, after previous fundraisers, the company raised $50M in Series C funding, bringing the company's total valuation to $1.4B. Allbirds expanded into other footwear (including running shoes and flip-flops) and athleisure clothing in collaboration with Outdoor Voices and Nordstrom. Further collaborations were coordinated with Adidas and independent designers such as Nicole McLaughlin through 2021.

The company began operating brick-and-mortar stores in the United States in 2017. Allbirds opened its first store in the United Kingdom on October 17, 2018, in London's Covent Garden.

By 2020, the company had raised $100M in Series E funding and had 21 retail stores worldwide. From 2016 to 2021, before going public, Allbirds raised over $200M in funding rounds alone.