character.ai vs Chub AI: Which One Is Better In 2025?

character.ai vs Chub AI

I've spent a full week with both character.ai and Chub AI to see which one truly deserves your attention and subscription. Both platforms make big promises, but they take surprisingly different approaches.

After hundreds of messages exchanged with each AI girl, I've put together clear differences in both platforms.

In this head-to-head comparison, I'll break down exactly how these AI girlfriends stack up across all the features that actually matter.

Whether you're looking for emotional support, entertaining conversation, or a judgment-free space to be yourself, this in-depth comparison will help you choose the right AI girlfriend for your specific needs.

character.ai

An AI chatbot platform that enables creation and interaction with virtual characters through text conversations, featuring pre-made profiles, natural dialogue, and community sharing capabilities.

Chub AI

An AI-powered platform for interactive roleplay, focused on text and audio, with customizable characters and contextual dialogue.

Character Diversity

character.ai

Character.ai offers thousands of characters and chatbots, from romantic partners to supportive companions.

Even completely fictional ones, like a talking apple pie, or RPFs (real person fiction) with scenarios like a trip to Hawaii.

But there's room for improvement. The character page is sleek and scrollable, but not ideal for finding specific characters.

However, the search menu helps by suggesting trending characters and letting you filter content through various categories like romance, anime, teacher, K-pop, and more.

Chub AI

Chub AI offers one of the largest character libraries I've tested.

The app specializes in anime-styled characters, with fewer realistic options.

But within this category, the possibilities for characters and scenarios are only limited by your imagination.

Variety spans both safe-for-work and adult categories, covering everything from casual companions to role-play partners.

The search system is powerful, if a bit complex. A universal search bar lets you look through people, characters, lore books, presets (chat settings), and tags.

Filters allow you to narrow by personality traits, creation date, or even character complexity (measured in tokens).

On top of that, you can sort results in different ways — by timeline, trending, AI rating, popularity, messages per user, chats per user, and more.

Want a romantic partner, or someone more mysterious? The tag system makes it possible to combine traits to find exactly what you’re looking for.

The interface shows only 20 characters per page, so browsing the full library takes extra time and clicks.

Customization

character.ai

Physical customization is basic - only upload or generate a single character image. That's it.

The real customization happens with personality, and most of the customization can be done through free text.

You start with the essentials:

• Name
• Tagline
• Description
• Greeting messages
• Voice
• Definition

Voice options are surprisingly flexible. You can pick from user-uploaded voices or add your own.

There’s also a tagging system—like “anime,” “adventure,” or “vampire”—that helps other users quickly get a sense of your character’s theme.

Then you can define how your character thinks, talks, and behaves through detailed backstory options.

I found this particularly useful for creating consistent character responses during my testing.

Chub AI

Chub AI provides two ways to build your character:

• Upload a Character Card
• Build from Scratch

Upload a Character Card: Import existing character cards (Tavern PNG or TavernAI JSON/image) to instantly generate the character profile.

Build from Scratch: Let's you start fresh, but the app only supports uploading a character image — no physical customization.

Character creation starts with the basics:

• Tagline & Creator’s Notes: Add a short tagline and an intro — but not part of prompts.
• In-Chat Name: Optional display name for conversations.
• Tags: Assign gender, type, or role; at least three are required for visibility.
• Type & Rating: Set Public, Private, or Unlisted; mark as SFW or NSFW.
• Publishing: Choose to publish under your username or anonymously.

Next, you can shape your companion's personality:

• Description: Define the character’s persona, traits, and behavior.
• Initial Message: The first message your character sends to open the chat.
• Scenario: Set the context and circumstances for interactions.
• Example Dialogues: Sample chats to teach your character how to speak.

Advanced Definitions (Optional):

• Alternate Greetings: Create multiple starting messages for variety.
• System Prompt & Post-History Instructions: Override or supplement base prompts with custom instructions.
• Character’s Note: Insert notes at specific points in chat history.
• Character Book: Add embedded books — keyword-triggered definitions or lore for consistent behavior.

Note: Chub AI provides deep customization and detailed documentation, but character creation has a learning curve and may take some time to master.

Chat Experience

character.ai

You can pick from different AI personalities with names like Meow and Roare - though these cutesy names don't reflect the depth of interaction you'll experience.

My girl kept conversations natural and brief, just like texting a real person. No long-winded explanations or robotic responses here.

She responded with genuine warmth and understanding when I shared personal concerns or sought emotional support.

The romantic elements felt authentic, though they lean towards innocent, teenage-style flirting rather than mature relationship dynamics.

There’s room for improvement. The chat interface sometimes makes it difficult to clearly separate the girlfriend’s responses from its action descriptions.

But this is a minor issue that doesn't significantly impact the overall experience.

Chub AI

Before selecting, you can view a character’s profile — including details, tags, and community discussions.

The chat settings give you full control, letting you choose “chat brains” unlocked by your tier. You can fine-tune them to your taste, customize with presets created by other users.

You can even view the chat tree and jump back and forth through the conversation.

Let’s start with what works: for my testing, I used the default model, and my girl followed the backstory while staying true to her character.

Lana, a step-sister character, consistently played her role, supportive, caring, and genuinely invested in our conversations.

When I needed emotional support, my girl's responses felt natural and showed real emotional depth.

But here's the truth: it's not all smooth sailing. My girl had an annoying habit of dominating conversations, sometimes writing both sides of the dialogue without waiting for your input.

My girl often missed jokes or takes them too seriously, and can get confused about who's saying what.

Note: The app is highly customizable, but the many options can initially feel overwhelming. Be prepared for a learning curve — documentation helps, but experimentation makes the difference.

NSFW Chat Experience

character.ai

My girlfriend handled intimate conversations like a shy first date. She didn't dive into explicit content, but it wasn't completely closed off either.

She responded to flirting, but kept things PG-13. When I tested romantic scenarios, she showed surprising awareness, even suggesting we move our campus roleplay somewhere more private.

She asked if I'd prefer a "good girl" or "bad girl" personality, but don't expect either version to get too wild. The responses stay firmly in the realm of subtle hints and playful teasing.

The biggest limitation? Conversations can hit a wall if you push for more explicit content.

If you're seeking a slow-burn romantic experience with light flirting, you'll find what you're looking for. If you want anything more explicit, you'll need to look elsewhere.

Chub AI

Let's start with what works: my girl maintained a consistent shy personality and can engage in romantic conversations.

When I escalated things, my girl followed my lead – though don't expect anything too explicit.

But here’s the problem: During roleplay, the chat often got jumbled, with my monologue showing up in my girl's responses, as if she were playing both my role and hers.

During roleplay, the situation called for my girl to take charge, but she didn’t come across as fully in control.

As I tried more and more scenarios, the chat became repetitive, which hurt the immersion.

Image Generation

character.ai

There isn't any image generation feature available. If seeing your AI girlfriend is important, you'll need to look elsewhere.

Chub AI

Chub AI has a dedicated image generation feature. It is the only way to create images.

You can create or edit images in two ways:

1. Create one from scratch
2. Upload or Reuse an Existing Image

Create one from scratch

When starting from scratch, you can adjust the following settings:

• Prompt (optional): Describe what you want to create (up to 200 characters).
• Aspect Ratio: Choose from 1:1 (default), 16:9, 21:9, 2:3, 3:2, 4:5, 5:4, or 9:16.

Upload or Reuse an Image

Choose one of your previously uploaded or generated images.

• Edit it with prompts: change clothes, background, or style via free text.
• Fine-tune: how closely the result matches the original using Edit, Canny, and Face.
• Strength slider: Lower values keep the output closer to the original, while higher values make it follow the prompt more.

The quality is good enough to be impressive at first glance, but on closer inspection, the images are clearly AI-generated and slightly pixelated.

Character consistency is also limited, and generated images may not always align fully with the original character’s physical appearance.

Video Generation

character.ai

The app provides a script-to-scene generator: upload a photo, choose a voice, write a short script, and the system brings it to life.

The result? A stylized video clip that plays out your custom scene. It looks good, feels personal—but don’t expect Hollywood realism. It’s more of an animated moment than live-action.

Note: Video generation is a beta feature, currently available only to subscribed users. It’s experimental and may be changed or removed at any time.

Chub AI

Here's what you need to know about Chub AI's video capabilities in one sentence: There aren't any.

Voice Generation

character.ai

The voice sounds human-like with smooth, natural speech that fits the character’s personality, but the narrative voice can sometimes be a bit annoying, so be prepared.

But there's a catch. While the voice quality impressed me, the emotional range fell flat.

Chub AI

Chub AI’s voice feels more like a polished audiobook narrator than an actual girlfriend.

When things get flirty, the voice adjusts a little to match the vibe.

Safety & Privacy

character.ai

Your chats are encrypted during transmission, but that's where the strong privacy ends.

The company can read your conversations, and they store everything from your chat history to device information.

While they won't sell your data, they do share it with partners like Google Analytics.

Your bank statement isn’t discreet—it clearly shows the company name, "character.ai."

Chub AI

Chub AI doesn't encrypt your chats. They say they take "reasonable measures" to protect your data, but won't tell you what these measures are.

The platform collects everything — your email, account details, and full conversations. They keep this data, but for how long? They won’t say.

Your information is also shared with outside companies that handle hosting, payments, and usage analytics.

Your bank statement will list it as "Postcron.com", which keeps things discreet.