Resources
Entity Recognition
| Resource | Author | Type | Protocols | Free Usage | Documentation | Coverage |
|---|---|---|---|---|---|---|
| <a href="https://api.ai/" title="API.AI is a natural language understanding platform that makes it easy for developers (and non-developers) to design and integrate intelligent and sophisticated conversational user interfaces into mobile apps, web applications, devices, and bots.">API.ai</a> | Service | REST api | Unlimited | <a href="https://docs.api.ai/">API Reference</a> | ||
| <a href="https://console.aws.amazon.com/lex/" title="Amazon Lex is a service for building conversational interfaces using voice and text. ">Amazon Lex</a> | Amazon | Service | REST api | 5k requests/month <sup>(1 year)</sup> | <a href="http://docs.aws.amazon.com/lex/latest/dg/what-is.html">API Reference</a> | |
| <a href="https://console.ng.bluemix.net/catalog/services/conversation" title="Add a natural language interface to your application to automate interactions with your end users.">IBM Watson</a> | IBM | Service | REST api | 10k calls/month | <a href="https://console.bluemix.net/docs/services/conversation/getting-started.html#gettingstarted">API Reference</a> | |
| <a href="https://rasa.ai/" title="Rasa NLU (Natural Language Understanding) is a tool for intent classification and entity extraction. ">Rasa</a> | LastMile Technologies | Python Module | python | Unlimited | <a href="https://github.com/golastmile/rasa_nlu">Installation</a> | |
| <a href="https://wit.ai/" title="Natural Language for Developers">Wit.ai</a> | Service | REST api | 1 request/second | <a href="https://wit.ai/docs/http/20170307#post%E2%80%94speech-link">API Reference</a> |
OCR
| Resource | Author | Type | Protocols | Free Usage | Documentation | Coverage |
|---|---|---|---|---|---|---|
| <a href="https://cloud.google.com/vision/docs/fulltext-annotations" title="Document Text Detection performs Optical Character Recognition. This feature detects dense document text in an image.">Google Vision</a> | Service | REST api | 1k pages/month | <a href="https://cloud.google.com/vision/docs/fulltext-annotations">API Reference</a> | ||
| <a href="https://ocr.space/" title="Free Online OCR - Convert images to text (Powered by the OCR API)">OCR.space</a> | a9t9 software | Service | REST api | 25k pages/month | <a href="https://ocr.space/ocrapi">API Reference</a> | |
| <a href="https://github.com/tesseract-ocr/tesseract" title="Tesseract is an open source Optical Character Recognition (OCR) Engine, available under the Apache 2.0 license.">Tesseract</a> | Tesseract | C Package | command line | Unlimited | <a href="https://github.com/tesseract-ocr/tesseract/wiki">Installation</a> |
Speech Recognition
| Resource | Author | Type | Protocols | Free Usage | Documentation | Coverage |
|---|---|---|---|---|---|---|
| <a href="https://azure.microsoft.com/en-us/services/cognitive-services/speech/" title="Convert spoken audio to text. The API can be directed to turn on and recognize audio coming from the microphone in real-time, recognize audio coming from a different real-time audio source, or to recognize audio from within a file. ">Bing Speech</a> | Microsoft | Service | websocket, REST api | 5k transactions/month | <a href="https://docs.microsoft.com/en-us/azure/cognitive-services/speech/home">API Reference</a> | |
| <a href="https://cloud.google.com/speech/" title="Google Cloud Speech API enables developers to convert audio to text by applying powerful neural network models in an easy to use API.">Google Speech</a> | Service | websocket, REST api | 60 min/month | <a href="https://cloud.google.com/speech/docs/">API Reference</a> | ||
| <a href="https://console.ng.bluemix.net/catalog/services/speech-to-text" title="The Speech to Text service converts the human voice into the written word.">IBM Watson</a> | IBM | Service | websocket, REST api | 1k minutes | <a href="https://www.ibm.com/watson/developercloud/speech-to-text.html">API Reference</a> | |
| <a href="https://github.com/julius-speech/julius" title="Julius is an open-source, high-performance large vocabulary continuous speech recognition (LVCSR) engine for speech-related researchs and developments. ">Julius</a> | Kawahara Lab | C Package | command line | Unlimited | <a href="https://jasperproject.github.io/documentation/configuration/#julius-stt">Installation</a> | |
| <a href="https://wit.ai/" title="Natural Language for Developers">Wit.ai</a> | Service | REST api | 1 request/second | <a href="https://wit.ai/docs/http/20170307#post%E2%80%94speech-link">API Reference</a> |
Speech Synthesis
| Resource | Author | Type | Protocols | Free Usage | Documentation | Coverage |
|---|---|---|---|---|---|---|
| <a href="https://console.aws.amazon.com/polly/" title="Amazon Polly converts text to lifelike speech in the cloud.">Amazon Polly</a> | Amazon | Service | REST api | 5m character/month <sup>(1 year)</sup> | <a href="http://docs.aws.amazon.com/polly/latest/dg/getting-started.html">API Reference</a> | |
| <a href="https://azure.microsoft.com/en-us/services/cognitive-services/speech/" title="Convert spoken audio to text. The API can be directed to turn on and recognize audio coming from the microphone in real-time, recognize audio coming from a different real-time audio source, or to recognize audio from within a file. ">Bing Speech</a> | Microsoft | Service | websocket, REST api | 5k transactions/month | <a href="https://docs.microsoft.com/en-us/azure/cognitive-services/speech/home">API Reference</a> | |
| <a href="https://console.ng.bluemix.net/catalog/services/speech-to-text" title="The Speech to Text service converts the human voice into the written word.">IBM Watson</a> | IBM | Service | websocket, REST api | 1k minutes | <a href="https://www.ibm.com/watson/developercloud/speech-to-text.html">API Reference</a> |
Telephony
| Resource | Author | Type | Protocols | Free Usage | Documentation | Coverage |
|---|---|---|---|---|---|---|
| <a href="https://www.messagebird.com/en-us/" title="Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.">Message Bird</a> | Message Bird | Service | REST api | - | <a href="https://developers.messagebird.com/docs/introduction">API Reference</a> | |
| <a href="https://www.nexmo.com/" title="Programmable Building Blocks for Next Generation Communication Applications">Nexmo</a> | Nexmo | Service | REST api | $2 credit | <a href="https://docs.nexmo.com/">API Reference</a> | |
| <a href="https://www.plivo.com/" title="Global SMS & Voice calls for businesses of all sizes">Plivo</a> | Plivo | Service | REST api | - | <a href="https://www.plivo.com/voice-api/">API Reference</a> | |
| <a href="https://www.twilio.com/" title="Build apps that communicate with everyone in the world. Voice & Video, Messaging, and Authentication APIs for every application.">Twilio</a> | Twilio | Service | REST api | $10 credit | <a href="https://www.twilio.com/docs/">API Reference</a> | |
| <a href="https://cloud.zang.io/" title="Cloud communication technology that transforms your conversations — and your business">Zang</a> | Avaya | Service | REST api | $10 credit | <a href="https://github.com/zang-cloud/zang-python">API Reference</a> |
Translation
| Resource | Author | Type | Protocols | Free Usage | Documentation | Coverage |
|---|---|---|---|---|---|---|
| <a href="https://cloud.google.com/translate/" title="Dynamically translate between thousands of available language pairs ">Google Translate</a> | Service | REST api | - | <a href="https://cloud.google.com/translate/docs/">API Reference</a> | ||
| <a href="https://console.ng.bluemix.net/catalog/services/language-translator" title="Want to dynamically translate news, patents, or conversational documents? Instantly publish content in multiple languages? Or allow your French-speaking staff to instantly send emails in English?">IBM Watson</a> | IBM | Service | REST api | 1m characters/month | <a href="https://console.bluemix.net/docs/services/language-translator/getting-started.html">API Reference</a> | |
| <a href="https://azure.microsoft.com/en-us/services/cognitive-services/translator-text-api/" title="Easily conduct real-time text translation with a simple REST API call">Microsoft Translate Text</a> | Microsoft | Service | REST api | 2m characters/month | <a href="https://docs.microsoft.com/en-us/azure/cognitive-services/translator/translator-info-overview">API Reference</a> |