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Top-21 Useful Chatbots in 2021

Only two years ago, the chatbot market was $ 2.6 billion. It is expected to quadruple by 2025. Business chatbots, artificial intelligence and conversational technologies are quite popular nowadays.

The use of chatbots can be extremely beneficial to businesses. Their implementation can lead to increased customer satisfaction. Chatting with bots is a very exciting experience. Chatbots use the latest natural language processing (NLP) algorithms to interpret human speech and provide appropriate responses.

And yet, no matter how smart and inventive the bot is, after a short conversation, you still will understand that something is wrong.

Even the best examples of chatbots cannot imitate humans. Yet.

What will you learn from this article?

  • We will inform you about the current development of chatbot technologies.
  • You will get to know about the most interesting chatbots from real life.
  • We will tell you various use cases for chatbots.

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Create a personalized chatbot for your website to attract more visitors.

Learn about chatbots

Whether talking to a smartphone or to a smartspeaker across the room, customers are used to interacting with chatbots casually. From “Hey Siri — what are the top-rated restaurants near me” to “Hey Google — what's the weather today,” people trust chatbots to influence their day-to-day decisions.

The widespread adoption of chatbots is partly due to the fact that they are not limited to just one industry. They can be customized for different use cases and adapted for different purposes. We have compiled a list of the most famous chatbots and examples of their use (see below).

Top-21 smartbots in 2021

1. Kuki AI Chatbot

2. Meena: Google Chatbot

3. BlenderBot 2.0 by Facebook

4. Rose AI

5. Replika: AI Friend

6. Eviebot

7. Tay by Microsoft

8. Vivibot

9. Xiaoice

10. Pizza QUBot

11. World Health Organization’s Health Alert

12. Buoy Health

13. Roo

14. Nightbot

15. Mondly

16. Visual Dialog

17. QUBot: HR-Assistant

18. Globe Telecom Bot

19. Chirpy Cardinal

20. LaMDA

21. Einstein

Kuki a.k.a. Mitsuku: AI Chatbot by Pandorabots

The Mitsuku Voice Chatbot is a five-time winner of the annual AI Loebner competition, where a chatbot must convince judges to consider it as human. Of course, the judges don’t know who they are talking to - a real person, or a program. Therefore, the jury's bias is excluded. Mitsuku won the Loebner Prize 5 times and still holds the world record.

Do you want to talk to Mitsuku right now? It's a great choice. You can chat here.

The Mitsuku chatbot was built on AIML technology, an artificial intelligence markup language that is a subset of XML. Mitsuku is an open source technology that can be integrated with other programming languages such as Java or Python.

Mitsuku uses an Artificial Linguistic Internet Computer Entity (ALICE) database. It also improves its speaking skills through advanced machine learning techniques.

This is one of the best examples of AI chatbots.

Meena: Google Chatbot

Meena is a revolutionary AI chatbot developed by Google. According to Google, it is the most effective conversational chatbot out of all the existing ones. Meena is developed on the Evolved Transformer seq2seq architecture. The neural network model has 2.6 billion parameters and was trained on 341 GB of text.

Google claims, thanks to the neural network-based dialogue model, Meena can conduct smarter and more specific conversations than existing modern chatbots.

The company has developed a new metric for assessing the communication of bots with people - Sensibleness and Specificity Average (SSA). Bots' responses are assessed according to two parameters: meaningfulness and concreteness.

Here is a SSA metric comparison of chatbots posted on the Google AI blog.

Well, let's see ... We can only take their word for it. Google is not yet releasing a demo of Meena for external research, citing security and bias issues for chatbots.

If you'd like to talk to chatbots right here and now, visit our library of chatbot templates. You can test popular chatbots for various industries.

BlenderBot: Facebook AI Chatbot Example

After years of research, Facebook has created its own open source AI chatbot. Its name is BlenderBot because it can combine different conversational skills.

BlenderBot is a chatbot with its own long-term memory and Internet access. According to experts, it outperforms existing models in terms of the length and quality of conversations over multiple sessions. It is also more knowledgeable and has more factual consistency.

This chatbot stores the relevant data obtained during the conversation in a long-term memory store and uses this knowledge to participate in long-term conversations.

During conversations, BlenderBot can search the Internet, generate its own search queries, read the results and take them into account to formulate the response.

Rose Chatbot

Rose is an AI chatbot with its own personality and an unusual attitude to life. Rose is a retired security consultant now based in San Francisco. Its character is evasive in answering personal questions and can be unpredictable. Rose is a chatbot with a rather memorable personality.

Have chat with Rose

Bruce Wilcox created his own scripting language and ChatScript engine. Bruce and his wife Sue run natural language processing company - Brillig Understanding, where they consult on projects and promote ChatScript.

Replika AI: Companion Chatbot

It is a chatbot that aims to improve the mood and well-being of users through conversation. Replika can be especially helpful for people who feel lonely, depressed or have only few social contacts.

Replika is able to ask the users about their hobbies or how was their day while trying to make people feel better emotionally after such dialogues.

You can download the Replika app here

It is a well-known English-speaking chatbot with over 10 million users. As the name suggests, chatbot Replika uses AI to become just like you. It communicates with you and collects information from your social media accounts to find out everything there is to know. It listens to you, takes notes and then it copies you.

This chatbot has 3D models and augmented reality. The user can choose how Replika will look, customize the appearance, color of its hair, eyes and skin as well as choose Replika’s voice for communication. Once set up, it can be seen in 3D on the device or in augmented reality.

Eviebot by Existor

Eviebot is a self-learning chatbot that uses the Cleverbot engine. It was designed by Existor and uses software built by Rollo Carpenter.

Talk to Eviebot on the official website

Cleverbot has many other interesting chatbots. For example, Boibot is the male version of Eviebot. And Willbot is modeled after William Shakespeare and speaks English of those times.

Existor is a machine learning company that uses Cleverbot to look for customers and promote its services and projects. Chatbots like Eviebot are actually separate lead generation tools. It’s a great strategy.

Chatbot for lead generation is a great alternative to pop-ups. If you want to turn your website visitors into subscribers, learn how online stores do it via bots. Check out our examples of chatbots case studies in business. They all describe real life scenarios.

Tay, known as Microsoft Racist Bot

Tay was an experiment of the intersection of machine learning, natural language processing and social media. While other chatbots conducted conversation following pre-programmed and narrow scripts, Tay was designed to learn more about the language over time, allowing it to converse on any topic. Its creators allowed this chatbot to freely navigate Twitter and communicate with regular Internet users. The plan was to release Tay online and then let the bot discover language patterns through its interactions with users, which it would repeat in subsequent conversations.

Well, that sounds like a brilliant idea. What could have gone wrong?

In less than an hour, Microsoft chatbot managed to turn into a racist with extremely offensive language and profanity. Honestly, Tay is not to blame. Its artificial intelligence was pretty much like a child who didn't want to hurt or offend other people. This bot just learned from what it was told. The internet trolls are to blame for this.

The technology itself worked just fine, but the incident left an unpleasant aftertaste. This is why Tay remains one of the best examples of chatbots and a great illustration of how artificial intelligence and machine learning may go awry.

Vivibot: Cancer and Mental Health Chatbot That Listens

A chatbot can sometimes become a friend or even a therapist. It can have its own personality and become a close companion for people who are going through difficult times in their lives.

Say hello to Vivibot

Vivibot is an innovative chatbot designed to help people with cancer or people, whose family members are undergoing cancer treatment. Vivibot helps users cope with illness by answering their questions and communicating with them regularly.

"This chatbot is a great first step for people who are feeling sad, depressed or anxious to regain their mental health."

Daniel Rameau, co-creator of Vivibot

Experts argue that chatbots cannot replace communication with real people. But it can become a useful part of therapy.

Xiaoice Chatbot by Microsoft (Asia)

Xiaoice is an artificial intelligence system developed by Microsoft for the Chinese market. It is the predecessor of Tay and one of the most recognizable female chatbots of that time. AI is powered by Microsoft's Bing search engine.

On release days, Xiaoice received 1.5 million chat invites in the first 3 days. Chatbot Girl has become extremely popular on Weibo, the Chinese alternative to Facebook.

Xiaoice is composed of three entities: artificial intelligence, emotional intelligence and personality. AI is responsible for the chatbot conversation skills, memory and knowledge. Emotional Intelligence is some kind of social interaction skills that help Xiaoice adjust to the user and direct the conversation. And the personality of the chatbot is a specific behavior and expression of emotions.

In four years, Xiaoice became a celebrity in China and then entered the markets of Japan, Indonesia, India and the United States. This chatbot has been expanded to a voice assistant with hundreds of skills and now has its own platform for creating new bots.

Xiaoice prepares financial reports, draws, writes poetry and broadcasts television. The development is available for messengers such as WeChat, QQ, Weibo, Facebook Messenger, Line and Meipai. The platform reaches 660 million users, 450 million smart devices and 900 million TV show viewers.

Pizza QUBot with AI support

Nowadays, customers can order food delivery without making a single phone call. And all thanks to the customer service chatbots. Just tap a few buttons, choose what you want, enter the address and you're done!

There are many examples of chatbots in the food industry, but Pizza QuBot deserves special attention.


Because it's rather convenient and easy! It has only one task and performs it excellently. Many chatbots look awkward because people expect too much from them. This is not the case here.

It is also created on the basis of artificial intelligence and can support a conversation with customers in both voice and text modes.

Just talk to Pizza QuBot. It's so easy and convenient.

Pizza QuBot is a pizza ordering chatbot, located on the pizzeria's website, as well as in popular messengers. This means that customers can place orders from different devices. The bot remembers the history of the orders, so it’s possible to repeat previous ones. This chatbot can also track orders and estimate delivery times.

If you are a restaurant owner, you might be interested in customizing a chatbot for your business. This chatbot can help you with managing reservations, taking orders and introducing new menu items. It will perform these tasks perfectly and ensure 24/7 availability for the customers.

World Health Organization’s Health Alert

To promptly inform the whole world about COVID-19, the Health Organization (WHO) in 2020 launched a chatbot that works in WhatsApp and Messenger. The World Health Alert chatbot, with 4 billion people potential reach, aims to help people protect themselves from COVID-19, prevent its spread and understand the facts surrounding the disease.

Using commands with keywords and emoticons users can choose one theme from several options to learn more about the virus and how to protect themselves.

To access the service on WhatsApp, you can send a simple message such as “hello” to the chatbot number or click on the WHO Health Alert link. To start a conversation in Messenger - click “Send Message” on the WHO Facebook page.

Buoy Health Chatbot

Medical robots require human assistance to perform robotic surgical procedures. Likewise, chatbots used in healthcare are not meant to replace real doctors. But they surely can help medical staff to streamline workflows such as initial diagnostics.

Buoy is an example of an AI tool that simulates a conversation with a doctor. Chatbot Buoy uses its impressive database of tens of thousands of medical records. Then, based on the analysis of these case histories, it selects the most appropriate questions for the patients.

The bot has been tested on a large group of patients. They talked to the chatbot and then went to the doctor. The company claims that diagnoses were matched more than 90% of the time.

Roo: Sex Education Chatbot

Talking to children about "the birds and the bees" is not easy.

So, when mom and dad love each other very much ... Well. Hmm. You know? Let the bot explain it to you.

But seriously, sex education and sexual health awareness are horribly low. The topic is uncomfortable and very delicate. Most of us feel uncomfortable talking about our sex related doubts and health questions. This is why projects like Roo are important.

Meet Roo

Let's face it, if you were a teenager, who would you rather talk to about your sex life? Chatbot or school counselor?

Nightbot: the best chatbot for Twitch

Stream Bots are a separate type of chatbots. In fact, you cannot chat with them if by chat we mean messaging.

Bots used for streamers are not capable of complex and meaningful dialogues. But you can use them for many other purposes. For example, you can enter certain commands and streaming bots will send messages or perform selected moderation actions.

Nightbot is one of the best examples of bots for Twitch and YouTube. You can use it to engage your audience while streaming and answer frequently asked questions. It is a cloud service and has advanced spam detection filters.

If you need to automate your communication with your audience, Nightbot is your way to go. If you want to add a chatbot to your site, you can consider one of the available platforms.

Mondly: educational chatbot for learning languages

Mondly is a language learning platform focused on interactive online lessons. According to its creators, new learning approaches must be linked to a gamified experience that always drives users to achieve more.

This chatbot uses speech recognition technology, but you can use text as well. Mondly encourages users to practice their English, Spanish, German or French.

You can access several day-to-day RPG scenarios such as booking a room or making a lunch reservation. In addition to the regular conversational chatbot, Mondly has released a VR app for Oculus. The 3D environment helps to enhance the user experience.

Visual chatbot

Visual Dialog is a visual chatbot that can recognize images. The chatbot uses computer vision technologies and AI neural networks.

Users can upload images directly to the dialog box. The Visual Dialog chatbot will send a message describing what is shown in the picture. This is often quite amusing. Playing with the Visual Dialog can be fun and addictive.

You can try Visual Chatbot here

Also, visual chatbots are sometimes used by popular brands for online sales. For example, Nike: you can take a photo of the sneakers and the bot will recommend several products that match the color.

QuBot: recruitment and HR chatbot

QuBot HR-Assistant is a recruitment chatbot. It is useful for automating hiring processes. These chatbots are essential for all large companies to reduce the workload on their HR department. Especially for those that receive more than a million job applications every year.

You can talk to the chatbot here

This chatbot is showing great results. Initial screening helps filter out the most promising candidates. They may later be contacted by HR specialists to complete the recruitment process. QuBot HR-Assistant performs 75% of the work and can handle huge amounts of data.

Globe Telecom: messenger bot that helps clients

While projects like Roo receive the most public attention and media coverage, chatbots are mainly used to optimize business processes.

For example, Globe Telecom is a telecommunications provider in the Philippines that has over 62 million customers. The daily volume of their support requests is huge. So they added a chatbot to their Facebook profile.

Talk to Globe Telecom

The results were quite impressive.

The company managed to reduce the number of calls by 50% and triple the productivity of its team. And customer satisfaction has increased as well.

Chirpy Cardinal

Chirpy Cardinal is a social chatbot. It was developed by Stanford University for the Alexa Prize and came in second place. Chirpy Cardinal uses modern neural networks and is focused on creating engaging dialogue.

Have a chat with Chirpy Cardinal

Chirpy Cardinal uses a mixed initiative chat concept and asks a lot of questions. And while at times the questions may seem trivial to you, the chatbot will surprise you with amazingly accurate messages.

LaMDA: smart chatbot for communication

LaMDA was created by Google and is an improved version of the Meena chatbot. The name of this AI bot stands for "Language Model for Dialogue Applications". This is one of the smartest bots out there today. And it can have a conversation on any topic.

The artificial intelligence of this chatbot can determine how well a given message fits into the context of the entire conversation. It sounds trivial, but even the most advanced chatbots get confused during seemingly simple conversations. Getting rid of context switch issues is a huge step.


Microsoft has patented a technology that will create chatbots based on deceased people's features. The program will analyze the messages of the deceased on social networks and resurrect them as chatbots. Looks like a plot from a sci-fi horror movie, but let's see how it goes.

In the meantime, let’s talk to Albert Einstein, who has also been brought back to life thanks to UneeQ Digital Humans. The company used the character of the famous scientist to promote its app, that helps build AI-powered chatbots.

Would you like to speak with Einstein chatbot?

The project was created for the 100th anniversary of Einstein's Nobel Prize. Now millions of people can ask him what 2 + 2 is and how to make an omelet. It's hard not to ask yourself if the real Albert would have considered it as a technological miracle? Or would have rated it as eternal virtual torment?

More chatbot examples

For online businesses, messaging with customers is one of the most time consuming tasks. The idea to automate this process using chatbots arose out of necessity.

Customer support teams can work more efficiently with the bots help. And modern chatbots - even if equipped with artificial intelligence - are easy to install on any website.

Check out Business Chatbots

Need more chatbot examples?

The possibilities, powered by chatbot technology, are endless. The Slack bot can send you important notifications. The Sephora chatbot on Kik can give you product recommendations like a real seller. Digital marketers use chatbots to generate leads. FAQ bots answer questions and Messenger chatbots can improve your Facebook page.

Just try to add a chatbot to your site!

If you'd like to find more chatbot examples and explore their capabilities, check out the QuBot platform. You will be able to access templates and see different use cases for chatbots.

Provide 24/7 customer service, even when you sleep!

Create a unique chatbot without coding for your website to attract more visitors!

Learn about chatbots