Google Cloud Natural vs Sentiment Analysis

Google Cloud Natural Language analyzes syntax, entities, and sentiment in text using the same machine-learning models that power Google's own products, callable via a straightforward API-key-authenticated REST interface. It includes a free monthly usage tier before per-unit billing applies to higher volumes.

MeaningCloud's Sentiment Analysis API performs multilingual, aspect-based sentiment analysis of text from surveys, social media, and reviews, distinguishing polarity, irony, and fact from opinion at the document or aspect level. Access is authenticated with a license key issued on signup, with a free plan (tens of thousands of monthly credits) alongside paid Professional/Business/Enterprise tiers.