Umigon is a tool used for the sentiment analysis of texts. It is one of the tools of the Nocode app which is a suite of text analysis tools. Results can be exported in Excel or CSV format for further analysis.

It was formerly a stand alone web-based and open-source tool for the sentiment analysis of tweets. From a person's Twitter handle, Umigon retrieved that account's tweets and processed them for sentiment while accounting for factual statements (ex: "I hate war" will be classified has negative, and "war in Syria" will be classified as neutral). Tweets could also be pasted manually in the entry box provided. Beyond sentiment analysis, Umigon could identify characteristics such as whether the tweet contains a question, whether it contains possible promotional/commercial subject matter, or temporal indicators based on tense.

The developer of this application can be reached on Twitter.

As of April 2022, Umigon has been archived after a long period without new developments.