Archive of Our Own

Archive of Our Own, commonly known as AO3, is a nonprofit online archive that hosts fan‑created works such as fanfiction, fanart, podfics and other transformative media. The site provides a searchable database where users can upload, tag and discover stories across a vast array of fandoms and genres. It is operated by volunteers who maintain the platform, curate content and enforce community guidelines. AO3’s core service is to offer free, open access to fanworks while preserving the rights of creators through its licensing framework, which defaults to a Creative Commons Attribution‑NonCommercial license. The archive does not display advertisements or charge fees for access, relying instead on donations to cover hosting and operational costs. By emphasizing user control over metadata, AO3 enables readers to locate works that match specific preferences and to avoid content they wish to skip.

The organisation’s headquarters are located in the United States of America, reflecting its incorporation under U.S. nonprofit law. AO3 serves a global audience, with contributors and readers accessing the site from many countries and language communities. The platform supports multiple languages for navigation and allows tags to be written in various scripts, facilitating cross‑cultural participation. Financial sustainability is achieved through voluntary donations from users, grants and occasional fundraising drives, rather than through commercial revenue. This donation‑based model aligns with the archive’s mission to remain independent of advertising or corporate influence.

A distinguishing attribute of AO3 is its comprehensive, user‑generated tagging system, which enables precise filtering of works by characters, relationships, themes and content warnings. The archive is managed by the Organization for Transformative Works (OTW), a nonprofit that advocates for the legal recognition of fanworks as transformative use under copyright law. In July 2023 AO3 experienced a distributed denial‑of‑service attack that temporarily disrupted service, an incident that highlighted both the site’s prominence and the reliance on volunteer administrators for rapid mitigation. Although a group claimed responsibility citing religious and political motives, independent experts questioned the validity of those claims. Volunteer administrators worked continuously to restore access, and the site returned to normal operation after the attack was mitigated.

AO3 does not have a parent company or subsidiaries; it is a standalone project of the OTW, which is registered as a 501(c)(3) charitable organization. Governance is carried out by the OTW’s board and various volunteer committees, ensuring that operational decisions remain community‑focused. The OTW also oversees related initiatives such as the Fanlore wiki and the Open Doors project, which aim to preserve fan culture and rescue at‑risk fanworks. Transparency reports and financial statements are published regularly, allowing donors and users to see how contributions are allocated.