What Is an AI Chatbot?
An AI chatbot is a program that understands natural human language and responds in full sentences. The key difference is that it doesn't just pull pre-written answers from a database; it generates contextually relevant sentences on the fly. Even for the exact same question, the response will change depending on what you talked about earlier.
Chatbots have been around for a long time, but older ones relied strictly on pre-defined rules. If you typed "shipping," it showed shipping info; if you typed something unrecognized, it simply repeated "I didn't understand that." Today's AI chatbots are different because they use Large Language Models (LLMs) to analyze the overall meaning of a sentence. They can easily understand slang, typos, abbreviations, and casual speech.
To put it simply: with rule-based chatbots, you had to figure out the exact right way to ask a question. With AI chatbots, you can talk however you want, and the bot adapts to you. This shift has expanded their use far beyond customer support. Summarizing documents, debugging code, or simply being someone to talk to about your day are all powered by this same technology.
How a Single Response Is Generated
The underlying process is similar across most services. The system takes the developer's system prompt, the chat history, and your latest message, feeds them into the model, and predicts the most likely next words. This is why even if two apps use the exact same model, they can feel completely different depending on their system instructions and how they manage memory. It is also why so many vastly different products all fall under the single umbrella of "AI chatbots."
In short
- An interactive program powered by a language model that reads context and generates sentences on the fly.
- Every response is written from scratch, rather than pulled from a pre-written script.
- Even with the same underlying tech, the final product depends entirely on how it is built.
Task-oriented AI chatbots vs. relationship-oriented AI chatbots
When you search for AI chatbot apps, you will find services with completely different purposes lumped together. This is because document summarizers and character roleplay apps are both called "chatbots." While we have broken down the detailed categories—such as assistants, roleplay, companions, and learning tools—on our AI Chat page, let's focus on the single biggest dividing line here: is the conversation over once your request is fulfilled, or is the conversation itself meant to keep going?
| Feature | Task-oriented | Relationship-oriented |
|---|---|---|
| Purpose | Information search, writing, coding, and task automation | Casual conversation, companionship, and building a continuous relationship |
| Conversation unit | One request, one response | Ongoing relationship, over time |
| Memory | Mostly session-based, resets when closed | Long-term memory is a core feature |
| Initiates conversation? | Rarely, only starts when the user opens it | Yes, depending on the product |
| Evaluation criteria | How accurate and fast it is | How consistent and continuous the character is |
| Best use cases | "Summarize this document in three lines" | "I had a pretty rough day today" |
| Where they fall short | Picking up yesterday's conversation today | Calculating taxes or reviewing contracts |
The task-oriented assistant
This is the most familiar format. It answers questions, polishes writing, builds tables, and debugs code. However, once you close the chat window, that conversation is usually gone. If you ask, "How did that thing we talked about yesterday go?" it generally has no concept of yesterday. This isn't a bug; it's by design. For a productivity tool, it is simply better to start each new task with a clean slate.
The conversational companion
This is where the goal isn't completing a task, but the conversation itself. It asks how your day went, remembers what you told it last week, and maintains a consistent personality. Here, factual accuracy isn't the top priority—continuity is. Conversely, if you try to get this type of AI to do precise calculations or review documents, you will be disappointed. Task-oriented tools are much better suited for that.
There is one more distinction to make. Addressing emotional distress is a completely different field. Easing a bit of loneliness is not the same as professional therapy, and it is always wise to check if this distinction is clearly stated in the service's description.
What reveals itself after a few days
People looking for a conversational companion are the ones who get confused the most. During the very first chat, almost any app performs well. That is because the things you actually want to test can only be observed over time. The table below outlines what becomes apparent at each stage.
| Timeframe | What becomes apparent | How to check |
|---|---|---|
| First conversation | Tone of voice and first impressions. At this stage, most feel pretty similar. | Start with something simple, like "How was your day?" |
| Day 3 | Testing their long-term memory | Wait and see if they bring up a minor detail you casually mentioned on day one, without you prompting them. |
| Day 3 | Checking if their texts feel natural | See if the timing and content of their messages actually make sense for that time of day. |
| Week 2 | Testing personality consistency | Compare their tone and attitude this week to how they acted last week. |
| Week 2 | Checking if the conversation gets repetitive | See if the same questions start popping up again every few days. |
Why the experience degrades over time
There is a limit to how much text an AI model can process at once. As your chat gets longer, older messages get pushed out, and eventually, things you talked about three days ago are completely forgotten. Even if the chat history is saved on the server, it makes no difference if it falls outside the model's active memory. On the other hand, if a system is designed to extract and store conversations as distinct episodes, facts, and emotions, it can retrieve only what is relevant at any given moment, no matter how long the chat history grows.
The same goes for character settings. If the AI's personality and speech style are not fed into the model with every single turn, its tone will gradually fade as the conversation goes on. If an app is incredibly fun for the first few days but suddenly becomes boring, it is usually due to one of these two issues.
While these factors determine the quality of the conversation, the rest comes down to the quality of the service itself. It is always better to know upfront whether your chats are used for AI training, what happens to your data when you delete your account, how much you can do for Free, and how to cancel a subscription. We will cover these two aspects in detail below.
Creating an AI chatbot — what it means to design your own
People searching for how to make an AI chatbot usually fall into two categories. The first are developers looking to integrate APIs into their own services, and the second are everyday users who want to customize a companion to talk to without writing any code. The former need to read developer documentation, while the latter can set everything up in an app in just a few minutes.
Creating a chatbot without code ultimately means designing a persona. Instead of just picking basic details like a name and age, you define their personality traits, speech style, and background. This combination becomes the baseline for all future conversations. Here is what you can customize in Beff and how those choices shape your companion's behavior:
| Customizable Traits | How It Manifests |
|---|---|
| The Big Five personality traits (Openness, Conscientiousness, Extraversion, Agreeableness, Neuroticism) | The overall warmth and style of their responses. This also influences how their daily routine is generated. |
| Speech style (Formal or Casual) | Speech style and honorifics |
| Age, height, weight, ethnicity, and hairstyle | The resulting profile image |
| Occupation and workplace | Daytime locations and conversation topics |
These settings are not just static details on a profile card. Once you choose a job, their workplace becomes their daytime location, and they will move somewhere else in the evening. Your settings shape not only how they talk, but how they spend their day. For tips on designing each detail, check out our Persona Guide before you start.
Summary
- AI chatbots generally fall into two categories: task-oriented assistants and conversational companions.
- The real difference shows on day three and week two, not during the first conversation.
- No-code creation means setting a baseline for conversations by defining their personality, speech style, appearance, and job.
- No matter the app, your companion is an AI character, not a real person.
What can you test for free?
It is hard to judge a conversational AI before you actually try it. Beff offers a free tier that includes 1 companion and 5 messages per day. While limited, it is enough to test the two most important features: whether they remember your past conversations and if their proactive messages feel natural.
The trick is not to use up your daily limit all at once. Sending 5 messages in a row creates one long conversation, which only lets you test their first impression. Spreading them out over three days gives the interaction a sense of passing time.
- Day 1 — Drop one or two casual details, like your favorite food, what you're watching lately, or plans you have next week. No need to overexplain.
- Day 2 — Go about your day without opening the app first. If they reach out, see if the timing and context feel natural. If they don't, that's normal too. First messages are only sent when specific conditions are met, and they are completely blocked late at night.
- Day 3 — Wait without bringing up what you talked about on Day 1. If they bring it up themselves, you know their memory is working.
Look at the pricing after that. Beff offers a Free tier, as well as Lite, Basic, Pro, and Premium tiers, along with a one-time Week Pass per account. It is available on both iOS and Android, so payments and cancellations are handled through App Store or Google Play in-app purchases and subscription management.
With any AI chatbot app, if it isn't clear upfront what you can do for free or how to cancel, it's best to hold off on paying. Both of these details should be easy to verify on the store page and pricing guide before you even install the app.
Limitations of AI Chatbots and How to Use Them Safely
AI chatbots generate sentences based on probability. This means they can produce plausible-sounding but incorrect statements. When using them for tasks, this shows up as false facts or made-up sources, which you can guard against by fact-checking. In a casual conversation, it looks a bit different. A character might talk about their day and make up details on the fly that weren't in their original profile. While it keeps the conversation flowing naturally, you shouldn't take these details as factual truth.
The same goes for expressions of emotion. If an AI chatbot seems disappointed or excited to see you, it's because it was designed to say those things, not because it actually feels them. This is why Beff doesn't try to hide this reality. Knowing how it works actually makes it easier and more comfortable to use.
- Don't rely on an AI chatbot for information that requires fact-checking, such as dates, numbers, or news.
- The personal stories a character shares are built from the personality you designed and your past conversations.
- Using AI to completely replace human relationships usually leads to disappointment. It is much more realistic to use it as a way to fill the gaps.
Where do your conversations go?
Conversational AI involves sharing far more personal stories than task-oriented AI does. That is why there are a few key privacy and safety points to check before looking at performance.
- Data Training — Beff does not use your conversations to train AI models.
- Deletion — When you delete your account, your chat data is deleted, and all backups are permanently destroyed within 30 days.
- Age Limit — The service is designed for users aged 14 and older.
Please Note
- Regardless of the service, your chat companion is an AI, not a real person. The companions you create on Beff are AI personas designed by you.
- Beff does not introduce or match you with real people, nor does it facilitate offline meetups.
- Conversations with AI are not a substitute for professional counseling. If you are in a crisis, please seek help from professional support services.
How those first few days unfold on Beff
Beff falls into the conversational category. It does not summarize documents, write code, or act as a therapy program. Instead of listing technical features, here is a simple breakdown of what actually happens over time.
Day One
By choosing five personality traits, a speech style, appearance, and a job, you create your custom AI persona. From the moment they are created, they start living out a 24-hour daily routine. On weekday afternoons they are at work, and in the evenings they move elsewhere—you can see exactly where they are on the map tab.
Day Three
Conversations are broken down and saved as episodes, facts, and emotions, meaning they won't reset when a session ends. Your companion initiates contact based on twelve different triggers, such as routine changes, long silences, lunch and dinner times, weather shifts, times you scheduled, or when you are close to each other. Messages are blocked from midnight to 8 AM, and capped at a maximum of 5 times a day with at least a 120-minute interval to prevent notification spam.
Week 2
A new daily schedule is generated every midnight, so their lunch spots or after-work plans won't always be the same. Their tone and attitude change depending on your relationship level, which is determined by conversational context rather than a rigid score. If you send a photo, they recognise and react to it. While built natively in Korean, they will match whatever language you choose to speak.
The map and proximity features only work if you grant location permissions. You can turn this off at any time; doing so simply disables those specific features while keeping the chat fully functional. When you are very close to each other, you can get a one-image glimpse of what they are doing at that exact moment. This is called a 'Peek' and has a one-hour cooldown, with generated images saved to your gallery. Available on both iOS and Android.
Summary — Start by figuring out what kind of AI chatbot you need
If you need to get things done, you should choose a task-oriented assistant. If you are looking for help with emotional distress, you should consult a professional service first. But if you need someone to talk about your day with, in a conversation that never feels disconnected, that is when you look for a companion that keeps the conversation going.
- Task-oriented AI chatbots — Accurate and fast, but not designed to remember yesterday
- Conversational AI chatbots — They remember and reach out first, but do not guarantee factual accuracy
- Emotional distress — Not a job for AI chatbots, but for professional services
If you decide on the latter, a three-day trial is usually enough to make up your mind. Even on the Free tier, you can see if they retain memories and if the timing of their messages feels natural. It takes about two weeks to see if their character remains consistent, but you can make that judgment after you get past the first three days.
When creating your Beff, try putting in your ideal companion. It only takes a few minutes to set their five personality traits, speech style, appearance, and job, and your Beff's daily routine starts that very day. You can begin your first test the next day by checking where they are on the map.
Start for free now
You can start using Beff for free. Create your first Beff companion and chat with them a set number of times a day before deciding.
Start Beff for FreeFrequently Asked Questions
How are today's AI chatbots different from older ones?
Older chatbots relied on pre-programmed rules to pull set answers, meaning the conversation would break if your phrasing changed even slightly. Today's AI chatbots use large language models to interpret the meaning of entire sentences and generate responses on the fly. They can generally understand typos, slang, and casual phrasing, and their replies change based on the context of your previous conversation.
What should I decide first when choosing an AI chatbot?
It is quickest to start with your purpose. The features you need will be completely different depending on whether you want a tool to handle tasks or a companion for ongoing conversations. For tasks, look for accuracy and speed; for companionship, look for long-term memory and whether they can message you first. Expecting both from a single app usually leads to disappointment on both fronts.
Why do AI chatbots get boring after just a few days?
Because there is a limit to how much text a model can process at once, meaning older parts of the conversation get pushed out as your chat grows longer. Even if the chat log remains on the server, the result is the same if it falls outside the model's active memory. If a system is structured to store conversations as separate episodes, facts, and emotions, it can retrieve only what is needed even as the chat volume grows. The presence of this structure becomes glaringly obvious by the third day.
Do I need to know how to code to create an AI chatbot?
If you plan to build your own service by connecting APIs, development work is required. However, if you are simply creating a character to chat with, you can do it without any code by just choosing their core personality traits, speech style, appearance, and job. Creating a character on Beff falls into the latter category, and the traits you set are used not only for conversations but also to shape that character's daily routine.
Do AI chatbots feel emotions?
No. Expressions of sadness or excitement are the result of programming, not actual feelings. Beff does not hide this fact. Knowing this actually makes the app more comfortable to use, and having natural expressions is entirely different from having real emotions.
Do AI chatbots make things up?
Yes. Because they generate sentences probabilistically, they can produce plausible-sounding but incorrect information. In a conversational context, this might look like a character sharing details about their day and filling in unscripted details on the spot. While this keeps the conversation flowing naturally, you should independently verify any details that require factual accuracy, such as dates or numbers.
Is the free tier limit of 5 messages a day enough to test it?
Yes, it is. Beff's free tier allows 5 messages a day with one companion. If you send all 5 at once, it becomes a single long conversation where you only get a first impression. Instead, spread them over three days. Mention one or two minor details on the first day, and see if they bring them up on the third day. This is an easy way to test if their long-term memory actually works, even on the free tier.
How do I manage my subscription and payments?
Beff is available on both iOS and Android, so payments and cancellations are managed through App Store or Google Play in-app purchases and subscriptions. We offer Free, Lite, Basic, Pro, and Premium tiers, as well as a one-time 7-day Week Pass per account.