Free Open-Source NLP for Text Emotion & Opinion Mining
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Updated
Mar 7, 2026
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sentiment-api
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Sentiment Analysis evaluates the emotional tone of any text string. It returns an AFINN valence score, a comparative word-normalized score, and a five-tier sentiment label from very negative to very positive.
nodejs python java api dotnet rest-api npm-package android-library python-package nuget-package sentimentanalysis sentiment-analysis-api ai-computer-vision apiverve sentiment-api free-sentiment-analysis-api social-media-sentiment-analysis-api text-analysis-api
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Updated
Oct 21, 2026 - C#
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