International ISBN Agency alternatives

4 isbn & metadata tools for self-published authors, similar to International ISBN Agency. Compare pricing and platforms, then pick what fits your workflow.

Bookow barcode generatorbookow.com

Free

Free ISBN barcode generator for covers.

Web

Bowker (MyIdentifiers)myidentifiers.com

Paid

Official US ISBN agency (single & bulk ISBNs + barcodes).

Web

Free retailer ISBNskdp.amazon.com / lulu.com

Free

KDP/Lulu/D2D provide free ISBNs (tied to their imprint).

Web

Nielsen UK ISBN Storenielsenisbnstore.com

Paid

Official UK ISBN agency.

Web