Sentiment Analysis API Comparison

Amazon Comprehend provides sentiment analysis with a baseline confidence level of 1, using positive and negative scores to indicate sentiment, with additional features such as entity analysis and syntax analysis available at no extra cost. Accuracy is highest when phrasing and intent are straightforward, but can be challenging due to sarcasm and other language devices. Pricing is based on units, with Amazon's minimum unit being 100 characters. Azure Text Analytics API also charges per 1000 characters, while Google Natural Language API uses a block-based pricing model. IBM Watson Tone Analyzer provides sentiment analysis alone, with a baseline confidence level of 1 and tone_id labels to classify sentiment further. Setup for each service is relatively easy, with minor exceptions. The choice of provider depends on language needs and cost breakdown based on usage volume.