Wit.ai
Free natural language processing platform for developers from Meta
Founded
2013
Starting Price
$0
Category
API Development
Last updated May 10, 2026
About Wit.ai
Wit.ai is a Meta-owned natural language processing platform that helps developers build text and voice-based conversational interfaces, chatbots, and voice assistants. The free service translates user input into structured data using intent recognition, entity extraction, and trait detection across 130+ languages. Wit.ai is widely used for building applications like home automation, wearables, robots, and messaging bots.
Pros & Cons
Pros
- Completely free with no usage limits or paid tiers
- Backed by Meta with active open-source community
- Supports 130+ languages out of the box
- Simple REST API and well-documented SDKs make integration quick
- Pre-built entities (datetime, location, number) reduce setup time
Cons
Key Features
Intent Recognition
Identifies the user's goal from natural language input to route conversational logic accordingly.
Entity Extraction
Pulls structured data such as dates, locations, numbers, and custom entities from free-form text.
Speech Recognition
Transcribes spoken audio into text and extracts intents and entities in a single API call.
Multilingual Support
Supports 130+ languages, allowing developers to build conversational apps for a global audience.
Custom Model Training
Train application-specific models with your own examples to improve accuracy on domain-specific phrases.
Trait Detection
Detects sentiment, greetings, and other traits to enrich the context of user messages.
Open-Source Libraries
Official SDKs for Node.js, Python, Ruby, Go, and community libraries for many other languages.
Pricing
Free
$0/forever
- Unlimited API requests
- Intent and entity extraction
- Speech-to-text
- 130+ languages supported
- Custom model training
Best For
Chatbot Development
Power messaging bots on Messenger, Slack, or custom platforms with intent and entity recognition.
Voice-Controlled IoT Devices
Add natural language voice control to smart home devices, wearables, and robots.
Internal Productivity Bots
Build internal tools that let employees query systems, schedule meetings, or trigger workflows via natural language.
Multilingual Customer Support
Process customer inquiries in 130+ languages without per-language model engineering.
