Bots are simple artificial intelligence systems that you interact with via text. Those interactions can be straightforward, like asking a bot to inform you what your website is all about? Is the service your giving are free or paid? etc.

Here are some of the platform for designing chatbot as per your requirement:-

Chatbots and AI

The bot platform for creating engaging brand experiences through messaging and voice. You don’t need to be a developer to use Parlo. They make it simple to build a smart bot with no coding knowledge, also allow developers to use Java/JS to make their bots more powerful and customized.

Its a Free platform.

End to end chatbots` development. NLP specialists.

It`s easy! Create a chat bot and make your customer feel like he is chatting with a friend.

Contact them to create a Chatbot.

Effortlessly design your Facebook Chat bots.

Build customized bot conversations in under 5 minutes. Share them or export as a gif and video — without writing a single line of code!

Solo is Free Forever & starter starts with $30 per month with free trial.

The bot that educates you on chat bots.

The bot on bots is still in development.

A marketplace to create and monetize deep learning chatbots.

A unique store where you can find both the tools and the channels to create and monetize your bots.

Contact them to create a Chatbot.

Toronto-based developer of AI chatbots and conversational UI.

DeepPIXEL Inc. is taking the conversations to a higher level. The advanced deep learning engine allows for deeper understanding of human conversations. Early BOT and conversation automation engines have massive holes in what they can understand often needing complex and massive flows to patch them; this is not scalable.

Contact them for the Demo.

Free bot for your restaurants build and deployed in 2 minutes.

Get your bot on Facebook messenger now! Build it in minutes, connect it in seconds and let your clients know about your menu updates, promotions or new working hours.

Its a Free platform.

Chatbot that handles your customer support.

Copilot.AI uses artificial intelligence to respond to questions automatically by using your internal FAQ or knowledge base. You can concentrate on delighting your visitor by going the extra mile with recommendations or special insights.

Plan starts from $15/month once launched.

Beautiful chatbox for your website.

Increase Your Conversion and Customer Satisfaction

Seed is Free pro startup from $25 per month.

An AI-based personal growth marketing assistant for Facebook Messenger.

From curating trending news to finding the perfect tool, BotConcierge prepares you for your next marketing move.

Build a Facebook bot without coding.

Create an AI chatbot to suit your needs.

Its a Free platform.

Create artificial intelligence chatbots without codding.

It will take 5 minutes to setup your Bot. They will help you in each step. From integrations to making it intelligent. Botsify have a simple interface which will help you to create advance and simple bots according to your personal and business needs.

Contact them to create a Chatbot.

Facebook messenger integration.

Smooch streamlines your development and lets you benefit from multi-channel support, rich message types, continous feature updates and delivery issues handled for you, through one unified API.

Unlimited Free trial available, essentials pay as you go.

Messenger platform.

With bots and live-messaging tools, you can create a custom experience for your unique audience.

Its a Free platform.

Develop platform for slack integration.

Beep Boop is a ridiculously simple developer platform for Slack integrations. Hosting, analytics, deployments, and development tools.

Tall plan is 100% Free, grade plan starts with about $10 per month.

Open-source toolkit for creating bots.

Botkit is the most popular open-source toolkit for creating bots for messaging platforms. It provides a semantic interface to sending and receiving messages so developers can focus on creating novel applications and experiences.

Its a Free platform.

The most powerful way to build, train, and deploy intelligent conversational apps.

They are developers. They have built conversational apps. Ultimately, believe that the best conversational experiences are built the same way that the best mobile and web applications are built: with good development practices and code.

Its a Free platform.

It is your customer support bot.

No programming required Build a Facebook bot without coding.

Stater plan is Free, advance plan starts with $12.99 per month.

Make an emotional connection by customizing your discussion.

Builds Chatbots that upgrade the email marketing promoting. Give your subscribers a chance to see your advertising messages in their most loved Messenger app.

14 days Free trial available.

The bot platform for businesses.

The Only bot platform with over 100 integrations.

Starts on Free trial, standard plan starts from $19 per month.

Power of Chatbots for your business.

Morphs your services into conversations and lets your users access those from anywhere.

Free plan available, essential starts frpm $49 per month.

Conversational User Experience Platform.

Build brand-unique, natural language interactions for bots, applications, services, and devices.

Its a Free platform.

Chatbots made easy.

Visually build, train & deploy bots to do just about anything.

Free plan available, small plan starts with $15 per month.

Create a Telegram bot without coding.

Manybot helps you create your own bot. You can send our posts to your users, create custom commands & beautiful menus.

Its a Free platform.

Collaborative Bot Platform.

Build your own conversational bot!

Its a Free platform.

So now you can easily build your own bot for your website, check out how chatbots will be your new best friend.

Please recommend if I missed any of the platform :)