Best 20 Free Chatbot APIs for Websites and Apps [AI Integrations & Docs]

Chatbots have become a crucial component of websites and mobile applications. They help businesses communicate with users instantly. Free chatbot APIs can help reduce costs while incorporating AI features into your platform. Many free chatbot APIs offer robust features that rival those of paid solutions. These APIs enable easy integration of intelligent conversational AI into your website or app. You can build customer service bots or interactive assistants without having to start from scratch.

This article lists 20 free chatbot APIs with their integration, features, and documentation.

Key Highlights

The top 20 free chatbot APIs list. Comparison Table for Top 5 Best Chatbot APIs. Easy integration for websites and apps. Free AI APIs with advanced features. Open-source and cloud chatbot solutions. Future trends in conversational AI.

What is a Chatbot API?

A chatbot API is a set of tools that allows apps and websites to interact with chatbots. It will enable an application to add conversational AI features. These APIs address the complex aspects of Natural Language Processing (NLP).

They support text, voice, or even multimedia messages. These APIs enable you to skip months of development typically required for building chatbots. They also provide access to advanced AI models that would be costly to train alone.

Why Use Free Chatbot APIs?

Free chatbot APIs offer significant advantages for developers and businesses just starting their AI journey.

• They help save money while testing or deploying chatbots.
• Provide access to AI and NLP features without advanced coding.
• Allow fast setup for websites, apps, or customer support systems.
• Offer documentation and examples for quick integration.

Free APIs also reduce barriers to entry for learning conversational AI development. Students and non-professionals can build projects without financial limits.

Start building your first AI chatbot with Chatboq API today.

How to Choose the Right Free Chatbot API

Choosing the best free chatbot API depends on several essential factors. You should consider the following when selecting a chatbot API:

• AI Capabilities: Does it effectively understand and utilize NLP?
• Supported platforms: Does it work on web, mobile, or messaging apps?
• Documentation: Are the guides and examples straightforward and easy to follow?
• Limitations: Offers free plans that often come with usage or feature restrictions.
• Community & support: Open-source APIs with active forums make troubleshooting easier.

Looking for modern AI capabilities? Try Chatboq API for free and test its NLP features now.

Best 20 Free Chatbot APIs for Websites and Apps 

Quick Summary Table of the Best 20 Free Chatbot APIs

API Name	Key Features	Free Limits	Best For
Chatboq API	Advanced NLP, sentiment analysis, webhooks	5,000 calls/month	Modern web apps
Dialogflow	Visual builder, 20+ languages, Google integration	180 requests/minute	Enterprise projects
Microsoft Bot Framework	Multi-platform, Azure integration, enterprise tools	10000 requests/month	Microsoft ecosystem
Rasa	Open source, ML-based, full customization	No restrictions	Self-hosted solutions
Wit.ai	Intent recognition, unlimited requests	No restrictions	High-volume apps
IBM Watson	Enterprise-grade, advanced analytics	2500 messages/month	Complex conversations
Amazon Lex	Voice support, AWS integration	10,000 text/5,000 speech	AWS-based projects
Pandorabots	AIML standard, template library	1,000 interactions/month	AIML developers
Botpress	Open source, visual editor, multi-channel	No restrictions (self-hosted)	Custom deployments
Chatfuel	Facebook Messenger, no-code builder	50 subscribers	Social media marketing
ManyChat	Marketing automation, Instagram support	1,000 subscribers	Marketing campaigns
ChatterBot	Python library, machine learning	No restrictions	Python developers
Botsify	Website widgets, WordPress integration	100 subscribers	Small websites
Tidio	Live chat hybrid, visitor tracking	100 visitors/month	E-commerce sites
Kommunicate	Human-bot handoff, multi-platform	100 conversations/month	Customer support
Flow.ai	Multi-channel, pre-trained models	250 interactions/month	Quick deployment
Snatchbot	20+ channels, unlimited interactions	Unlimited (with ads)	Multi-platform reach
Botkit	Open source framework, Slack integration	No restrictions	Developer-friendly
Landbot	Conversational forms, A/B testing	100 chats/month	Lead generation
Collect.chat	Form conversion, CRM integration	100 responses/month	Data Collection

Explore the top 20 free chatbot APIs for websites and apps. These tools make it easy to integrate AI chat, automate responses, and deliver more effective customer service.

1. Chatboq API

Chatboq API delivers cutting-edge conversational AI with powerful features:

• Advanced NLP Processing – Chatboq understands complex user queries and context.
• Sentiment Analysis – Can detect user emotions for personalized responses.
• Multi-language Support – Manages global conversations smoothly.
• Webhook Integration – Can connect with existing business systems.
• Real-time Responses – It provides instant AI-powered conversations.
• Easy Integration – Has a simple API setup for web and mobile apps
• Comprehensive Documentation – Has clear guides and examples of code

Documentation: Available at chatboq.com

Free Limitations: 5,000 API calls/month, basic analytics, community support

Ready to add intelligent conversations to your website? Start with Chatboq API today for modern AI-powered chatbots that understand your users better.

2. Dialogflow (Google)

Google’s leading conversational AI platform offers enterprise-grade features:

• Visual Flow Builder – Design conversations without coding
• 20+ Language Support – Global chatbot deployment
• Pre-built Agents – Ready-to-use templates for everyday use cases
• Google Assistant Integration – Native voice assistant support
• Advanced NLP – Context-aware conversation management
• Rich Responses – Cards, buttons, and multimedia support
• Analytics Dashboard – Track performance and user interactions

Documentation: Available at cloud.google.com/dialogflow/docs

Free Limitations: 180 requests/month, basic analytics

3. Microsoft Bot Framework

Microsoft’s comprehensive solution provides powerful development tools:

• Multi-language SDKs – C#, JavaScript, Python support
• Azure Integration – Advanced AI services and analytics
• Multiple Channel Support – Teams, Skype, Facebook Messenger
• Unlimited Standard Messages – No limits on basic integrations
• Enterprise Security – Built-in compliance and data protection
• Bot Composer – Visual authoring tool for complex conversations
• Rich Card Support – Interactive elements and media

Documentation: Available at docs.microsoft.com/en-us/azure/bot-service/

Free Limitations: 10000 requests/month, paid premium channels

4. Rasa

Open-source conversational AI platform with complete control:

• Machine Learning Based – Train custom models for specific domains
• Complete Data Control – Self-hosted deployment options
• Python Framework – Developer-friendly architecture
• Custom Actions – Build complex business logic integrations
• Multi-turn Conversations – Advanced dialogue management
• Active Community – Extensive forums and tutorials
• No Vendor Lock-in – Full customization and modification rights

Documentation: Available at rasa.com/docs/

Free Limitations: Open source – no restrictions, but requires self-hosting

5. Wit.ai (Meta)

Meta’s free natural language processing platform for developers:

• Unlimited API Requests – No usage restrictions or limits
• Intent Recognition – Understand user goals and purposes
• Entity Extraction – Identify specific information in messages
• Voice and Text Support – Handle both spoken and written input
• Built-in Training Tools – Improve accuracy over time
• Simple HTTP API – Easy integration across platforms
• Facebook Integration – Direct connection to Meta’s ecosystem

Documentation: Available at wit.ai/docs

Free Limitations: None, it is completely free with unlimited requests.

6. IBM Watson Assistant

Enterprise-grade conversational AI with advanced features:

• 10,000 API Calls Monthly – Generous free tier allowance
• Multi-turn Conversation Handling – Complex dialogue management
• Built-in Analytics – Performance tracking and optimization
• Web Chat Widgets – Ready-to-deploy interface components
• Mobile SDK Support – Native app integration tools
• Voice Assistant Integration – Speech-enabled conversations
• Enterprise Security – Compliance certifications and encryption

Documentation: Available at cloud.ibm.com/docs/watson-assistant

Free Limitations: 2500 API requests/month, 5 skills, basic analytics

7. Amazon Lex

Amazon’s Alexa-powered natural language understanding service:

• Voice and Text Processing – Handle both speech and written input
• 10,000 Text Requests Monthly – Generous free tier limits
• 5,000 Speech Requests – Voice-enabled chatbot support
• AWS Service Integration – Connect with Lambda, DynamoDB, S3
• Automatic Speech Recognition – Built-in voice processing
• Context Management – Maintain conversation state automatically
• Multi-platform Deployment – Web, mobile, and IoT device support

Documentation: Available at docs.aws.amazon.com/lex/

Free Limitations: 10,000 text requests/month, 5,000 speech requests/month

8. Pandorabots AIML

Pioneer chatbot platform using AIML standard:

• AIML Technology – Industry-standard markup language for bots
• 1,000 Monthly Interactions – Sufficient for testing and small apps
• Drag-and-drop Builder – Visual conversation design tools
• Pre-built Templates – Personality-driven and business chatbots
• Extensive AIML Library – Thousands of community-created files
• Code-based Development – Advanced customization options
• Long-standing Community – Years of accumulated knowledge

Documentation: Available at docs.pandorabots.com

Free Limitations: 1,000 interactions/month, limited to 2 bots

9. Botpress

Open-source platform with a visual editor and customization:

• Visual Flow Editor – Drag-and-drop conversation design
• Built-in Modules – FAQ, slot filling, and analytics components
• Multi-channel Support – Web chat and messaging app integration
• Custom Module Development – Extend functionality with plugins
• Third-party Integrations – Connect with external services
• Community Edition – Completely free for self-hosting
• Developer-friendly Architecture – Easy to modify and enhance

Documentation: Available at botpress.com/docs

Free Limitations: Open source – no restrictions, requires self-hosting

10. Chatfuel

Facebook Messenger specialist with no-code builder:

• Facebook Messenger Focus – Native social media integration
• 50 Subscriber Limit – Perfect for small business testing
• Visual No-code Builder – Create bots without programming
• Pre-built Templates – Customer support and e-commerce ready
• Zapier Integration – Connect with popular business tools
• Built-in Analytics – Track engagement and performance metrics
• Quick Setup Process – Get started in minutes

Documentation: Available at docs.chatfuel.com

Free Limitations: 50 subscribers, Chatfuel branding, limited integrations

11. ManyChat

Marketing automation platform for social media:

• 1,000 Subscriber Support – Generous free tier for marketing
• Instagram and Facebook – Dual platform messaging support
• Visual Flow Builder – Advanced conditional logic and tagging
• Broadcast Messaging – Send updates to subscriber lists
• E-commerce Integration – Automated sales funnel creation
• Growth Tools – Website widgets and social media capture
• User Tagging System – Segment audiences for targeted messaging

Documentation: Available at manychat.com/help

Free Limitations: 1,000 subscribers, ManyChat branding, basic automation

12. ChatterBot (Python)

Python library for machine learning chatbots:

• Open Source Library – Completely free with no restrictions
• Machine Learning Capabilities – Self-improving conversation agents
• Multiple Training Datasets – Pre-built conversation data
• Simple Python API – Easy integration for Python developers
• Platform Adapters – Connect to various chat platforms
• Storage Backends – Flexible data persistence options
• Active Community – Regular updates and community contributions

Documentation: Available at chatterbot.readthedocs.io

Free Limitations: Open source – no restrictions

13. Botsify

Simple chatbot platform for websites and Facebook:

• 100 Subscriber Support – Good for small business websites
• Drag-and-drop Interface – No technical skills required
• WordPress Integration – Easy plugin installation
• Custom Web Widgets – Branded chat interfaces
• Basic Analytics – Conversation history and performance tracking
• Facebook Messenger Support – Social media integration
• Quick Bot Creation – Get started in minutes

Documentation: Available at docs.botsify.com

Free Limitations: 100 subscribers, 1 chatbot, basic features

14. Tidio

Live chat and chatbot hybrid platform:

• Unlimited Chat Support – No restrictions on chat volume
• 100 Unique Visitors – Monthly bot interaction limit
• Visitor Tracking – Real-time website visitor monitoring
• Lead Capture Tools – Automated contact collection
• E-commerce Focus – Specialized for online retail
• Human Handoff – Seamless transfer to live agents
• Pre-built Templates – FAQ and contact collection ready

Documentation: Available at help.tidio.com

Free Limitations: 100 unique visitors/month for bots, basic automation

15. Kommunicate

Human-bot hybrid support platform:

• 100 Monthly Conversations – Balanced free tier allowance
• Seamless Human Handoff – Smooth bot-to-agent transitions
• Multi-platform Support – Website widgets and mobile apps
• Built-in FAQ Bot – Automatic common query handling
• Rich Message Formats – Images, buttons, and quick replies
• Messaging Platform Integration – Connect popular chat apps
• Real-time Chat Support – Live agent collaboration tools

Documentation: Available at docs.kommunicate.io

Free Limitations: 100 conversations/month, 1 bot, basic features

16. Flow.ai

Multi-channel conversational platform:

• 250 Monthly Interactions – Suitable for testing and prototypes
• Basic NLP Capabilities – Intent recognition and entity extraction
• Visual Conversation Builder – Complex flow design support
• Multi-channel Deployment – Web, mobile, and messaging apps
• Pre-trained Models – Common intents and entities included
• Built-in Analytics – User behavior and success rate tracking
• Quick Deployment – Fast setup and integration

Documentation: Available at docs.flow.ai

Free Limitations: 250 interactions/month, 1 bot, basic NLP

17. Snatchbot

Multi-platform chatbot with advertising support:

• Unlimited Bot Creation – No restrictions on the number of bots
• Unlimited Interactions – No usage limits (ad-supported)
• 20+ Channel Support – Wide range of platform integrations
• Visual Bot Builder – Industry-specific templates available
• CRM Integration – Lead management and tracking tools
• Multi-language Support – Global deployment with translations
• Template Library – Pre-built bots for various industries

Documentation: Available at help. snatchbot.me

Free Limitations: SnatchBot branding, ads displayed, limited integrations

18. Botkit

Open-source framework for conversational interfaces:

• Multiple Platform Support – Slack, Facebook, web chat integration
• Modular Architecture – Custom functionality through plugins
• Community Plugins – Extensive third-party extensions
• Built-in Conversation Management – Context and state handling
• Developer-friendly Design – Easy customization and modification
• Active Community – Regular updates and support
• Service Connectors – Popular platform integrations included

Documentation: Available at botkit.ai/docs

Free Limitations: Open source – no restrictions

19. Landbot

Conversational landing page platform with no-code design:

• Conversational Landing Pages – Turns traditional forms into engaging chatbot interactions.
• No-code Builder – Create bots with conditional logic, integrations, and rich media support.
• A/B Testing – Optimize conversion rates with different conversion flows.
• Lead Scoring – Identify high-quality prospects for follow-up.
• Multi-channel Support – Deploy on web, mobile, and messaging apps.
• Pre-built Templates – Ready-made flows for customer support, lead generation, and more.

Documentation: Available at help.landbot.io

Free Limitations: 100 chats/month, 1 landbot, Landbot branding

20. Collect.chat

Conversational form platform for data collection:

• 100 Monthly Responses – Perfect for lead capture forms
• Form-to-chat Conversion – Transform traditional forms
• No-code Setup – Simple website widget embedding
• CRM Integration – Connect with popular business tools
• Email Marketing Tools – Automated follow-up sequences
• Custom Branding Options – Colors and conversation flows
• Easy Deployment – Quick website integration

Documentation: Available at help.collect.chat

Free Limitations: 100 responses/month, Collect.chat branding, basic customization.

Transform your website visitors into engaged customers. Try Chatboq API for advanced conversational AI that delivers results.

Comparison Table of Top 5 APIs

API Name	Platforms	Key Features	Free Limits	Documentation
Chatboq API	Web, Mobile, Custom apps	Advanced NLP, sentiment analysis, webhooks	5,000 calls/month	Excellent and Comprehensive
Dialogflow	Web, Mobile, Google Assistant	Advanced NLP, 20+ languages, Visual builder	15,000 requests/month	Excellent
Microsoft Bot Framework	Web, Mobile, Teams, Skype	Multi-language SDKs, Azure integration	Unlimited standard channels	Comprehensive
Rasa	Self-hosted, Custom platforms	Open source, ML-based, Full control	No restrictions	Community-driven
Wit.ai	Web, Mobile, Voice apps	Intent recognition, Entity extraction	Unlimited requests	Good

This comparison highlights the diversity among top free chatbot APIs. 

Chatboq API leads with modern features and excellent documentation for contemporary applications. Try Chatboq API free and compare it with other top solutions.

How to Integrate a Free Chatbot API into Your Website or App

Integrating a chatbot API typically follows a similar pattern across different providers. Start by creating an account and obtaining API credentials from your chosen platform. Most APIs require authentication through API keys or OAuth tokens. Store these securely and never expose them in client-side code. Use environment variables or secure configuration files instead. Here’s a basic flow for web integration:

1. Capture user input from your chat interface
2. Send a POST request to the API with the message and the session ID
3. Parse the JSON response for bot reply and actions
4. Display response in your chat UI
5. Handle any additional actions like button clicks

Mobile app integration follows similar patterns but may use platform-specific SDKs. iOS developers can use Swift libraries, while Android developers work with Java or Kotlin SDKs.

Best Practices for Using Chatbot APIs

Successful chatbot implementation goes beyond basic API integration. Focus on creating natural conversation flows that guide users efficiently toward their goals. Some best practices to follow are:

• Keep conversations simple and clear for users.
• Regularly review chatbot logs to identify and resolve errors.
• Use analytics to improve response quality.
• Combine AI with human support if needed.
• Update chatbot scripts based on user feedback.

Following these best practices helps you deliver a more engaging and practical chatbot experience. They also improve user satisfaction and help you achieve your business objectives.

Future of Chatbot APIs and AI Integrations

Conversational AI is evolving rapidly, and staying ahead requires understanding emerging trends. Focus on technologies and strategies that enhance user experience, security, and integration. Some key trends to watch are:

• Advancing natural language understanding with large language models like GPT and Claude.
• Multi-modal capabilities: handling text, images, voice, and video for richer experiences.
• Cross-platform consistency across websites, mobile apps, and messaging platforms.
• Proactive AI that anticipates user needs and initiates helpful conversations.
• Enhanced privacy and data protection, including on-premises deployment options.
• Deep integration with business systems for personalized assistance using real-time data.

Following these trends enables you to build chatbots that are more intelligent and versatile, effectively engaging users, maintaining trust, and providing seamless experiences across all touchpoints.

Conclusion

Free Chatbot APIs offer powerful tools that enable you to add conversational AI to your websites and applications. There are options for every technical skill level and use case, from Chatboq APIs’ modern features to open-source solutions like Rasa. Choosing the right API depends on your needs. Startups may prefer generous free tiers from Microsoft or unlimited usage from Wit.ai. Enterprises may choose Dialogflow or Watson for greater scalability.

The conversational AI landscape continues evolving rapidly. By building expertise with these free tools today, you’ll be well-positioned to take advantage of future innovations and opportunities in the space.

Ready to transform your website with intelligent conversations? Try Chatboq’s free trial and start building your chatbot today.