Direct comparison
ORCID Vs Isni: Key Differences & Comparison | CASRAI
ORCID and ISNI both identify people, but for different communities. ORCID is a researcher-controlled identifier focused on scholarship; ISNI (ISO 27729) is a broader public-identity identifier covering authors, artists, performers, and organisations, assigned by registration agencies.
Side-by-side comparison
| Dimension | ORCID | ISNI |
|---|---|---|
| What it identifies | Individual researchers | Public identities of contributors — people and organisations |
| Primary community | Research and scholarship | Books, music, film, broadcasting, libraries, plus research |
| Standard | Aligned with ISO 27729 / ISNI; ORCID Inc. governance | ISO 27729 (International Standard Name Identifier) |
| Who assigns it | Self-registered and controlled by the researcher | Assigned by ISNI registration agencies and the ISNI-IA |
| Control of the record | The individual curates their own record | Maintained by registration agencies from authoritative sources |
| Cost to the individual | Free for researchers | No direct cost to the named party; agencies handle registration |
| Format | 16-digit iD, e.g. 0000-0002-1825-0097 | 16-digit number, e.g. 0000 0001 2103 2683 |
| Scope of identities | Living researchers who register | Living and historical persons, and organisations |
| Linking | An ORCID iD can record a linked ISNI | An ISNI can reference a person’s ORCID iD |
Common questions
FAQ
Do I need both an ORCID and an ISNI?+
For most researchers an ORCID iD is the practical choice — you register and control it, and funders and publishers use it. An ISNI may already exist for you if you have published books or creative works, since agencies assign them. The two can be linked, so they coexist rather than compete.
Who assigns an ISNI?+
ISNIs are assigned by the ISNI International Agency and its registration agencies, drawing on authoritative records (such as library catalogues and rights bodies), rather than being self-claimed the way an ORCID iD is.
Are ORCID and ISNI both ISO standards?+
ISNI is the ISO 27729 standard. ORCID is aligned with ISNI and operates within the same standard family, but ORCID is run by ORCID Inc. as a researcher-focused, self-managed identifier.
Going deeper
