Top 22+ Emotion & Sentiment Analysis APIs

Other than facial recognition, there are many APIs out there that can detect emotion and perform sentiment analysis on text, images, animations and video files.

In today’s blog post, we’ll take a look at all the emotion and sentiment analysis APIs and break them down by available endpoints, pricing and API keys.

Related: How to use Bing News Search API with the Aylien Text Analysis API to perform News Summarization and Sentiment Analysis.

List of Emotion APIs

Here is a list of the top Emotion Recognition and Sentiment Analysis APIs (in no particular order) on the RapidAPI.com marketplace we thought were worth mentioning:

1. Bitext Text and Sentiment Analysis API

This REST API allows you to perform:

• Sentiment Analysis
• Entity Extraction
• Categorization
• Concept Analysis

Endpoints

• categories analysis – categories analysis
• categories results – categories results
• concepts analysis – concepts analysis
• concepts results – concepts results
• entities analysis – entities analysis
• entities results – entities results
• sentiment analysis – sentiment analysis
• sentiment results – sentiment results

Pricing
Once you get an API Key (see below), you’ll get a 31 day trial with 5000 free API requests.

After that, you’ll have to refer to this Bitext API Pricing table:

How To Get An API Key
To get a Bitext API key, you’ll have to:

1. Visit the Bitext API portal and sign up for a key.
2. Verify your email address.
3. Navigate to “API Credentials” and grab your API Token

2. Emo Vu by Eyeris API

Emo Vu API by Eyeris is a emotion recognition API based on deep learning. It can read facial micro-expressions in real-time.
Endpoints

• Image – Use the image endpoint to extract age, gender, emotion, face recognition results and more from static images.
• ImageFrame – Use the imageframe endpoint to extract age, gender, emotion, face recognition results and more from an image sequence.

Pricing
There is a basic free tier that allows up to 500 monthly API calls.

The rest of the plans you can view here:

How To Get An API Key
Once you’re subscribed to a pricing plan, you will use your RapidAPI API key to make your requests to the API. Your RapidAPI key is provided with every code snippet as the “X-Mashape-Key” and can also be found in your RapidAPI Dashboard under the “Security” tab of your application.

3. Emotion Analysis API

The Emotion Analysis API by Twinword can help detect emotion by reading paragraphs of text.
Endpoints

• Analyze (get) – Detect the emotions of a paragraph of text
• Analyze (post)

Pricing
The Emotion Analysis API is free up to 100 API calls/month.

For paid plans, view this table:

How To Get An API Key
Like Emo Vu, you just need your RapidAPI (X-Mashape-Key) API key to begin using this API.

4. F. A. C. E. by Sightcorp API

The F.A.C.E. API by Sightcorp can easily detect faces to measure the subject’s:

• headpose
• age
• gender
• and emotion

in any image.

Endpoints

• F.A.C.E. Detect [File] – By sending a picture with one or more faces, the service will reply with a JSON response containing the following information: Age, Gender, Mood, Facial Expressions, Face Position, Face Rotation, Eye Position, Traking Points, Clothing Colors.
• F.A.C.E. Detect [Url]

Pricing
This is a free emotion API for up to 2 weeks with the trial.
For the paid plans, see this table:

How To Get An API Key

1. Go to the Service page
2. Create Sightcorp’s Face API account or log in.
3. Choose “Trial” to create a new account with 2 weeks of trial or choose a subscription plan.
4. In the dashboard you will see your new app, Copy your appKey.

5. Face Detection and Analytics API

This API by Matrix.one performs facial detection within photos to provide face analytics such as Age, Gender and Emotions.

Endpoints

• Analytics for Faces – Retrieve demographics of each face.
• Demographics for a Face – Generates a set of demographics for an individual face.

Pricing
This API is free up to 500 daily API calls.

For more paid plans, see here:

How To Get An API Key
For this API, you just need your RapidAPI Key (X-Mashape-Key) to integrate the Face Detection and Analytics API with your app.

6. Face++ face detection API

The Face++ (Face Plus Plus) API is created by cognitive services.

With any given photo, the Face++ API can detect:

• face location
• age
• race
• gender
• and more.

Endpoints

• Face Detection – Detect the information of the given photo(e.g. face location, age, race, gender etc.)
• Face Landmark

7. Google Cloud Vision API

Endpoints

• batchPictureDetections – Detects 1 property for several images
• batchTypeDetections – Detects several properties for one image
• detectExplicitContent – Detects explicit content like adult content or violent content within an image
• detectFaces – Detects multiple faces within an image, along with the associated key facial attributes like emotional state or wearing headwear
• detectImageProperties – Detects general attributes of the image, such as dominant color.
• detectLabels – Detects broad sets of categories within an image, ranging from modes of transportation to animals.
• detectLandmarks – Detects popular natural and man-made structures within an image.
• detectLogos – Detects popular product logos within an image.
• detectText – Performs Optical Character Recognition (OCR)

The Google Cloud Vision API can detect faces, labels, logos text and more within a given image.

With the Detect Faces endpoint, the API can detect someone’s emotional state.

Pricing
Each feature of the Google Cloud Vision API applied to an image is a billable unit.

See Google’s pricing table here:

How To Get An API Key

1. Navigate to the Google API Console
2. Create or select a project.
3. Click Continue to enable the API.
4. On the Credentials page, get an API key (and set the API key restrictions). Note: If you have an existing unrestricted API key, or a key with server restrictions, you may use that key.

8. IBM Watson Tone Analyzer API

The Tone Analyzer by IBM Watson can understand emotions, social propensities and communication/writing styles within a given pieces of html or text.

Endpoints

• analyzeToneFromHtml – Analyzes the tone of HTML
• analyzeToneFromText – Analyzes the tone of text

Pricing
Here’s a breakdown of their API Pricing:

How To Get An API Key

1. Register to IBM Bluemix Console
2. After log in choose Tone Analyzer from services
3. Connect Tone Analyzer to your application at the left side, choose pricing plan and click on ‘Create’ button at the bottom of the page.
4. Click on ‘Service Credentials’ tab to see your username and password.

9. indico API

This API is a RapidAPI/Mashape wrapper for the following indico APIs:

• Sentiment Analysis
• Political Alignment Detection
• Language Detection
• Text Tagging

Endpoints

• /language – /language
• /political – /political
• /sentiment – /sentiment
• /texttags – /texttags
Connect to API

10. Kairos API



Using the Kairos API, you can find and analyze faces (even in a crowd!) from any image. Get emotion recognition data using the getEmotionalAnalysis endpoint.

Endpoints

• addFacesToGallery – Takes a photo, finds the faces within it, and stores the faces into a gallery you create.
• compareFaces – Takes a photo, finds the face within it, and tries to compare it against a face you have already enrolled into a gallery.
• createEmotionalAnalysis – Create a new media object to be processed.
• deleteEmotionalAnalysis – Delete media results. It returns the status of the operation.
• deleteFaceFromGallery – Removes a face you have enrolled within a gallery.
• deleteSingleGallery – Removes a gallery and all of its subjects.
• detectFaces – Takes a photo and returns the facial features it finds.
• getEmotionalAnalysis – Returns the results of a specific uploaded piece of media.
• getEmotionalAnalysisAnalytics – Returns the overall impressions from a specific uploaded piece of media.

Pricing
Kairos offers a free personal plan for the Cloud API with limits and throttling.

For business plans, click here.

How To Get An API Key

1. You can create and manage your API Keys via your Kairos dashboard. It’s free to sign-up and start testing.
2. Switch to APPLICATIONS endpoint.
3. Click on Create New Application button.
4. Fill in Application Name and Application Description fields and click on Create Application button.
5. Use Application ID as appId and one of the Application Keys as appKey.
Connect to API

11. Microsoft Emotion API



The Microsoft Emotion API performs emotion recognition from facial expressions in any image.

Related: How to use the Computer Vision API with Python

Endpoints

• getEmotionRecognition – The emotions detected are happiness, sadness, surprise, anger, fear, contempt, and disgust or neutral.
• getEmotionRecognitionWithFaceRectangles – Recognizes the emotions expressed by one or more people in an image, as well as returns a bounding box for the face.

Pricing
The Microsoft Emotion API has a free tier that offers 30,000 image transactions per month.

For all plans, see this table:


Tier	Features	Unit	Price
Emotion API—Free	30,000 image transactions free per month 3,000 status queries per month (limited to 5 per min)	Transactions	Free
Emotion API—Basic	10 image transactions per second (face must be pre-specified)	Transactions	$0.10 per 1,000 transactions
Emotion API—Standard	10 image transactions per second 30,000 status queries per month (limited to 10 per min)	Transactions	$0.25 per 1,000 transactions

How To Get An API Key

1. Navigate to the Microsoft Service page
2. Create a Microsoft account or log in.
3. Choose “Emotion – Preview” to create new subscription
4. In Key section choose Key1 or Key2 and press Show or Copy
Connect to API

12. mojitok Stickers API



This Stickers/Emoticons API by mojitok provides stickers, emojis or gifs based on the emotion extracted from inputted text.

Endpoints

• emoticons – Suggests a list of emoticons to match emotions or situations.
• feedback – Provides statistics on the usage of emoticons.
• package – Provides a list of mojitok emoticons packages.

Pricing
The mojitok API is free up to 100 API calls per day.

For additional paid plans, see:


Plan	Pricing	API Requests	$ per extra API Call
Basic	Free	100 per day	$0.01
Pro	$99.00	100,00 per month	$0.01
Ultra	$999.00	1,000,000 per month	$0.01

How To Get An API Key
Just use your RapidAPI Key aka X-Mashape-Key.

Connect to API

13. Portrait3d API



This API converts an uploaded image and creates a photorealistic 3D avatar that can move and express emotions.

Endpoints

• Create Avatar From POST File
• Create Avatar From URL

Pricing
This API is free up to 10 API calls per month.

For more paid plans, see:


Plan	Pricing	Requests	$ per extra API call
Basic	Free	10 per month	$0.1
Pro	$35.00	500 per month	$0.085
Ultra	$250.00	10,000 per month	$0.035
Mega	$1,500.00	100,000 per month	$0.015

How To Get An API Key
Use your RapidAPI Key!

Connect to API

14. Repustate Sentiment and Text Analytics API



The Repustate Sentiment API allows you to extract keywords/phrases and determine social media sentiment in many languages including:

• English
• Arabic
• German
• French
• Spanish

Endpoints

• Adjectives – Adjectives
• Bulk language detection – Bulk language detection
• Categorizations – Categorizations
• Chunking with sentiment – Chunking with sentiment
• Clean HTML – Clean HTML
• Correction – Correction
• Data extraction – Data extraction
• Language detection – Language detection
• N-grams – N-grams

Pricing
This sentiment API is free up to 1,000 monthly API calls.

For additional premium plans, see this table:


Plan	Pricing	API Calls/Month	$ per extra API Call
Basic	Free	1,000	$0.01
Pro	$79.00	10,000	$0.01
Ultra	$499.00	100,000	$0.01
Mega	$1,299.00	999,999	$0.01

How To Get An API Key
Use your RapidAPI Key. Sign up here to get one.

Connect to API

15. Russian Sentiment Analyzer API



This is a JSON API that is capable of parsing the input text, reconstructing the meaning of messages (including typos), liking tweets, and finding sentiment polarity oriented towards a specific object.

Endpoints

• Client feedback – Client feedback
• Input text – Input text
• Input text for subjectivity – Input text for subjectivity
• Input text with client_text_id – Input text with client_text_id

Pricing


Plan	Pricing	API Calls/Month	$ per extra API Call
Basic	$29.00	10,000	$0.02
Pro	$99.00	100,000	$0.02
Ultra	$199.00	350,000	$0.02

How To Get An API Key
Use your RapidAPI Key/X-Mashape-Key.

Connect to API

16. Sentiment Analysis API



This sentiment API developed by MeaningCloud can perform sentiment analysis on any piece of text using advanced natural language processing (NLP) techniques. It can also detect entites and concepts.

Endpoints

• sentiment-2.1 – sentiment-2.1

Pricing
MeaningCloud’s Sentiment Analysis API is free to use up to 40,000 monthly API calls. After that, it is going to cost you $0.003 per API call.

How To Get An API Key
Use your RapidAPI Key found in your account. Sign up for free!

Connect to API

17. SkyBiometry Face Detection and Recognition API


S
SkyBiometry has an easy-to-use facial detection, recognition and grouping API that can check gender, age, smile, glasses, dark glasses, lips (parted/sealed), eyes (open/closed), emotions (neutral, angry, disgusted, scared, happy, sad and surprised), roll, yaw, facial points.

Endpoints

• Account/Authenticate – Account/Authenticate
• Account/Limits – Account/Limits
• Account/Namespaces – Account/Namespaces
• Account/Users – Account/Users
• Faces/Detect – Faces/Detect
• Faces/Group – Faces/Group
• Faces/Recognize – Faces/Recognize
• Faces/Status – Faces/Status
• Faces/Train – Faces/Train

Pricing
SkyBiometry has a free tier for up to 5,000 monthly API calls. For more paid plans, see:


Plan	Pricing	Calls Per Month	Cost per additional Call	Calls per day	Calls per hour	Trained tags per account	Support
Free	€0 monthly	5000	-	2,400	100	1000	-
P1	€50 monthly	40,000	0.0125 €	1-40,000	1-40,000	1000	2 business days
P2	€100 monthly	100,000	0.01 €	1-100,000	1-100,000	1000	2 business days
Custom	Custom	Custom	Custom	Custom	Custom	Custom	Custom

How To Get An API Key
Register here to get your API Key.

Connect to API

19. Text Analysis by ParallelDots



This Text Analysis API by ParallelDots provides solutions to build search engines and apps which can deeply understand conversations, sentiment, reports, and news so you can align your business with customer preferences and intent.

Using the emotion endpoint, you can detect emotion attached to textual data on social media, surveys, and customer feedback. The Emotion Analysis classifier is trained on a proprietary dataset and can tell whether the underlying emotion behind a message is:

• Happy
• Sad
• Angry
• Fearful
• Excited
• Funny
• or Indifferent.

Endpoints

• /abuse – /abuse
• /emotion – /emotion
• /intent – /intent
• /keywords – /keywords
• /multilang – /multilang
• /ner – /ner
• /sentiment – /sentiment
• /sentiment_social – /sentiment_social
• /similarity – /similarity

Pricing


Plan	Level 1 Pricing	Level 2 Pricing	Level 3 Pricing	Level 4 Pricing
Standard	$0 for 10K hits/month (1K hits/day)	$0.001 for 10K - 1M hits/month (No Daily Limit)	$0.0008 for 1M - 10M hits/month (No Daily Limit)	-
Premium	$0 for 100 hits/month	$0.002 for 100 - 1M hits/month	$0.00175 for 1M - 10M hits/month	-
Custom	$0 for 100 hits/month	$0.003 for 100 - 1M hits/month	$0.00275 for 1M - 10M hits/month	$0.0025 for more than 10M hits/month

How To Get An API Key

1. Navigate to ParallelDots.com
2. Sign up for account
Connect to API

20. Text To Emotions API



Analyze tweets, comments or chats and extract their emotions with the Text to Emotions API by Qemotion. This API not only extracts sentiment (positive/negative) but also provides analytics such as real emotions expressed into texts.

Endpoints

• get_emotions – get_emotions

Pricing
For $1.00, you get access to 260 API calls/month. See this table for more info:


Plan	Pricing	API calls/month	$ per additional call
Basic	$1.00	260	$0.3
Ultra	$99.00	10,000	$0.2
Mega	$199.00	30,000	$0.05

How To Get An API Key
Select a pricing tier and use your RapidAPI account’s API Key to get started.

Connect to API

21. Text- Processing API



Features of the Text-Processing API include sentiment analysis, stemming and lemmatization, part-of-speech tagging and chunking, phrase extraction and named entity recognition.

Endpoints

• phrases – phrases
• sentiment – sentiment
• stem – stem
• tag – tag

Pricing
The Text-Processing API is free to use up to 45,000 monthly calls.

For paid plans, see this table:


Plans	Pricing	Monthly API Calls	Cost per additional API Call
Pro	Free	45,000	$0.01
Ultra	$35.00	1,000,000	$0.0005
Mega	$75.00	2,500,000	$0.0001

How To Get An API Key
Choose a pricing tier for the API on RapidAPI and you’re good to go when you’re using your RapidAPI account key (X-Mashape-Key).

Connect to API

22. Tweet Sentiment Analysis API



The Tweet Sentiment Analysis allows you to analyze tweets, facebook posts, or other small chunks of text to extract sentiment using natural language processing and breaking down the text into different components in combination with a massive database of historical data.

Endpoints

• Tweet Sentiment API – Analyses a string of text and returns information about whether the sentiment is probably negative or positive, along with a score to indicate how strong that probability is.

Pricing
The Tweet Sentiment API is free up to your first 1,000 monthly API calls.

For more pricing see this table:


Plan	Pricing	API Calls/day	$ per additional call
Basic	Free	1,000	$0.005
Pro	$20.00	10,000	$0.005
Ultra	$50.00	50,000	$0.005
Mega	$100.00	250,000	$0.001

How To Get An API Key
If you’re a RapidAPI user, you just need your RapidAPI Account Key. Sign up today for free!

Connect to API

Summary: Best Emotion & Sentiment Analysis APIs

API	# of Endpoints	Free Plan Available	API Key Required
Bitext Text and Sentiment Analysis API	8	Yes with Trial	Yes
Emo Vu by Eyeris API	2	Yes	No
Emotion Analysis API	2	Yes	No
F.A.C.E. by Sightcorp API	2	Yes with Trial	Yes
Face Detection and Analytics API	2	Yes	No
Face++ face detection API	2	-	-
Google Cloud Vision API	9+	Yes	Yes
IBM Watson Tone Analyzer API	2	Yes	Yes
indico API	4	-	-
Kairos API	9+	Yes	Yes
Microsoft Emotion API	2	Yes	Yes
mojitok Stickers API	3	Yes	No
Portrait3d API	2	Yes	No
Repustate Sentiment and Text Analytics API	9+	Yes	No
Russian Sentiment Analyzer API	4	No	No
Sentiment Analysis API	1	Yes	No
Sky Biometry Face Detection and Recognition API	9+	Yes	Yes
Text Analysis by ParallelDots	9+	Yes	Yes
Text To Emotions API	1	No	No
Text- Processing API	4	Yes	No
Tweet Sentiment Analysis API	1	Yes	Yes

Do you agree with our list of the Best Emotion APIs? Which APIs are missing from our blog post? Let us know in the comments below.

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