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Atlassian Corporation is an Australian-American proprietary software company that specialises in collaboration tools designed primarily for software development and project management. Founded in Sydney in 2002 and domiciled in the United States since 2022 as Atlassian Corporation Plc., the company is globally headquartered in Sydney, Australia, with a US headquarters in San Francisco, and over 12,000 employees across 14 countries. Atlassian currently serves over 300,000 customers in over 200 countries and territories around the world.