doccano

doccano is an open-source annotation tool best suited for teams requiring a no-fee solution under an MIT license. Its cloud and self-hosted deployment options cater to organizations with specific infrastructure preferences for their annotation workflows.

Teams prioritizing established web presence or commercial support might find alternatives more suitable. For those seeking a managed service with broader market adoption, options like Label Studio or Prodigy could be considered.

Generated from the verified facts above (pricing, license, deployment, Wikipedia). Not a vendor review — synthesis of our catalog data.