Finto AI, automated subject indexing service based on Annif

Date published
Finto has launched an automatic subject indexing service called Finto AI. It is currently available for three languages, Finnish, English and Swedish.
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Gerd Altmann /

You can find Finto AI and more information about it  at The web page includes a form which can be used to submit text for analysis. Finto AI also has an open API that enables integration to existing systems.

For over six years Finto has offered thesauri and ontologies to support subject indexing. Now Finto AI brings machine learning and language technology solutions to aid in this work. Finto AI is based on Annif, an automatic indexing tool that has been developed at the National Library of Finland. 

Annif has been developed and offered as an experimental service for roughly three years. Many users have already put it into use: for example at the University of Jyväskylä, students submitting their Master’s thesis to the JYX repository get suggestions from Annif that they can use or modify before accepting them, after which a librarian does a final check. A similar approach is being piloted at the University of Vaasa.

In the development of Annif several algorithms were discovered and tested, and the currently best combination was selected for Finto AI. The ensemble model based on neural networks has been trained with data from the Finna discovery service. Development of Annif continues and future updates and improvements in that service will be added to Finto AI.

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