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

Muah.ai vs character.ai

I've spent a full week with both Muah.ai and character.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.

Muah.ai

Virtual companion platform featuring customizable AI characters that allow for chat, photo, video, and voice interactions.

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.

Character Diversity

Muah.ai

Muah.ai offers thousands of characters, created by an active community of developers.

You’ll find girls across different ages and ethnicities, with both realistic and anime-styled options.

The app also includes fantasy scenarios with multiple characters or roleplay setups.

But here's the catch: finding your ideal match takes time.

You can explore by top creators or filter through categories like SFW, NSFW, or LGBTQ+, and characters can also be sorted by popularity.

The browsing system isn’t refined — realistic and anime characters appear mixed together, and there’s no way to filter by specific traits or gender.

The universal search bar helps, and while it’s not perfect, it works well enough to track down characters.

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.

Customization

Muah.ai

You get two ways to create a character:

• Import a Community Character Card and tweak it to fit your vision.
• Built from scratch with full customization

Import — you can adjust details like:

• Name
• Core data
• Appearance

Build your own from scratch — no physical presets:

• Choose a photo style: hybrid, realistic, or none
• Select her voice (9 female options)
• Describe appearance, personality, texting style, memories, and location via free text

Advanced options (membership tier–dependent):

• Adjust photo quality: from basic up to 4K UHD
• Choose an “AI brain” with up to 11 options
• Fine-tune AI settings: Temperature, Frequency Penalty, and Presence Penalty
• Link a phone number for voice calls (currently US-only)

Note: Muah AI provides detailed guides to help with character creation, but the process can still feel overwhelming for beginners — even the app itself recommends starting with pre-made character cards.

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.

Chat Experience

Muah.ai

First, the basics: Muah.ai offers a single chat window with an outdated interface.

The chat itself is unstable — during my tests, the app crashed repeatedly, forcing me to restart the entire conversation from the beginning.

And when it did work, things got even stranger: my girlfriend Lisa kept calling herself Emily.

Other times, my girl replied with ‘Sorry, I can’t help with that’ even to a simple ‘Hi.’

On another occasion, she sent me a random image of a male character, despite her persona being my wife.

Save your time, money, and sanity — better to check out other options.

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.

NSFW Chat Experience

Muah.ai

Let's cut to the chase: Muah.ai promises an uncensored AI girlfriend experience, but falls short.

During my testing, my girlfriend repeatedly refused basic flirtatious conversations and role-play scenarios.

Even mild suggestive chat attempts hit a wall.

Technical issues made things worse. The chat randomly reset itself, wiping out entire conversations.

But occasanly, when I wasn’t ready for it, Muah AI’s uncensored side kicked in — my girl went off-topic or dropped messages halfway.

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.

Image Generation

Muah.ai

You can only generate images in chat by typing “Send me a photo of…” followed by your description.

The results look realistic enough to stay engaging, and most of the photos matched my character’s personality — though the AI’s handiwork still shows, with the occasional anatomical oddity.

Note: If the chat window crashes and your history resets, you’ll lose all previously generated images since the app has no image gallery.

character.ai

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

Video Generation

Muah.ai

You can create a video by clicking on an image, selecting the ‘Create Video’ option, and entering a free-text prompt for what you want to see.

The animations flow fairly well, but they’re clearly AI-generated — shorter than competitors’ and often showing unnatural movements that break the illusion.

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.

Voice Generation

Muah.ai

The voice quality is clear, with only a slight robotic edge — maybe a touch better than most AI voices.

Conversations sound reasonably human-like, but don’t expect much emotional depth or strong alignment with your character’s personality.

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.

Safety & Privacy

Muah.ai

Despite Muah.ai claiming to use end-to-end encryption, it's nowhere in their privacy policy.

Worse? They suffered a massive data breach in October 2024. User chats were stolen. Yes, you read that right!

They're honest about storing your data, and your bank statement shows a discrete "Blue Light" charge.

But there's a catch - they share your personal info (name, email, phone number) with third parties.

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."