Fedora Repository vs IBM Optim Archive

Fedora Repository is open-source software for storing, managing, and preserving digital content, primarily as a backend component rather than a complete end-user application. It exposes digital objects and metadata through RESTful APIs. Fedora can store any file type and size, without restrictions on metadata schemas or data models; metadata is RDF by default, and it supports any ontology or vocabulary. Preservation features include OCFL-based persistence, automated fixity checks and checksums, and versioning. Its design follows the OAIS reference model (ISO 14721). Storage options include a local filesystem and Amazon S3, and listed integrations include Samvera, PHAIDRA, Islandora, and ARGOS (OpenAIRE). Fedora uses standards including Linked Data Platform, Memento, WebAC, Solid, REST, and OCFL. It runs on systems with a modern Java runtime, including Linux, macOS, and Windows, and supports Docker images. The software is freely available under the Apache 2.0 License; voluntary institutional contributions help support the program.

IBM Optim Archive has no write-up on Specifiction yet; its figures are above.