doccano is described as 'open source text annotation tool for humans. It provides annotation features for text classification, sequence labeling and sequence to sequence tasks'. There are six alternatives to doccano for SaaS, Online / Web-based, Self-Hosted solutions, Mac and Windows. The best alternative is Label Box. Other great apps like doccano are HyperLabel (Free Personal), Segments.ai (Paid), Heartex (Paid) and Prodigy ML (Paid).