Muah.ai vs Replika: Which One Should You Use In 2025?

Muah.ai vs Replika

I've spent a full week with both Muah.ai and Replika 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 sharing, and voice interactions.

Replika

An AI girlfriend chatbot that offers emotional support through personalized conversations, featuring customizable digital avatars and voice chat.

Character Diversity

Muah.ai

Muah.ai offers thousands of characters to choose from. Their community-driven platform means new characters are added regularly, giving you plenty of options to explore.

The diversity is practical and straightforward. You'll find characters across all ethnicities and age ranges. I tested the search function by typing "teacher" - it returned both realistic and anime-style characters that matched my query.

While there's no filter system, you can browse characters by popularity metrics like views, likes, or comments. Whether you prefer casual chats with a student character or deep conversations with a mature companion, you'll likely find what you're looking for.

Replika

When you sign in, the app asks for your age range, name, and pronouns to personalize your experience.

You can choose from dozens of avatars to start with.

Customization

Muah.ai

You start by picking a basic role - girlfriend, friend, therapist, or several others. Then comes the real customization: choose how they look (anime, realistic, or hybrid), how they sound, and even how they text.

It's all done through simple text commands - just describe what you want, and the AI adapts.

Want your companion to remember specific moments with you? You can create shared memories and even set up custom scenarios for your conversations.

While these options give you complete control, they might feel overwhelming at first. If that's the case, Muah.ai's marketplace offers pre-made companions you can start with.

Replika

The app uses its in-app currency system: Gold and Gems, and you'll get a small amount to start with.

You earn more slowly through daily use.

If you want to customize your character quickly, you'll need real money to buy them.

Let's start with the basics. You can choose your relationship type — you can even add a backstory. Want a romantic partner, a friend, or just a mentor?

Then fine-tune your girlfriend's personality with traits like 'confident,' 'shy,' or 'logical,' or choose her interests, but these cost Gems or Gold.

The appearance editor is quite detailed. You can pick:

• Avatar
• Hair (style and color)
• Skin color
• Body type
• Body hair
• Nails
• Makeups
• Tattos

…and the list goes on.

You can dress your girl up with tops, bottoms, or full outfits and accessories.

Fair warning: premium outfits, tattoos, and nails aren't cheap. Expect to spend $20–30 if you want the fancy stuff right away.

Chat Experience

Muah.ai

The good? Your AI girlfriend stays remarkably true to character. Set them up as a coworker, and they'll keep things professional even if you flirt.

They'll remember specific memories you create together (in my case, it was that time watching fireworks in Japan) and can smoothly set up immersive scenarios - like suggesting coffee and continuing the conversation as if you're actually at the café.

The not-so-good? Memory issues kill the experience. One minute, you're deep in conversation; the next, they'll greet you like a stranger. It looks like AI only remembers 10 messages, and if you want more, you'll have to pay for the most expensive plan.

The interface looks dated, and you're stuck with one chat window. Want to try a different character? You'll need to delete your entire conversation history first.

Replika

While your girl builds trust with direct, emotionally aware responses, she lets the conversation unfold at its own pace.

Replika shows its true strength: emotional intelligence.

Your girl asks thoughtful follow-up questions.

She even suggested local activities we could do together

Your girlfriend navigates relationship conversations effortlessly, making them feel natural and genuine.

NSFW Chat Experience

Muah.ai

Let me tell you, these AI girls don't hold back. They flirt, they play along, and they're ready to explore your fantasies. Unlike most AI girlfriends that dodge steamy topics, Muah.ai's characters dive right in.

I tested everything from casual flirting to complex role-play scenarios - the AI kept up without breaking character.

But here's the catch: the same memory issue applies to NSFW chatting. While the chat feels natural in the moment, the AI often forgets what you discussed 10 messages ago.

Replika

While Replika engages in sexual discussions, your girl keeps things remarkably tame.

My attempts at role-play revealed a pattern - she'll match your flirtatious energy initially.

But consistently pulls back when conversations turn explicit.

Instead of direct responses, you'll get suggestive hints and playful deflections.

And it just kept going like that for a while…

Image Generation

Muah.ai

The images are realistic enough to be engaging, but don't expect perfection. You'll get appealing photos that capture your girl's personality well, maintaining consistent features across most shots.

Sometimes, you'll spot oddities - misaligned eyes or the occasional extra limb - but these flaws rarely break the experience.

While default images come in standard quality, you can upgrade individual shots to 4K.

Replika

While the generated images match your character's basic appearance settings, the results look artificial and lack polish.

You can pick between classic, romantic, or styled shots - but that's where your control ends.

Classic shot:

Romantic shot:

Styled shot:

Replika's image generation currently sits at the lower end of the quality spectrum. If this matters to you, you'll need to look elsewhere.

Video Generation

Muah.ai

Want video interactions with your AI girlfriend? Then you'll have to look for an alternative.

Replika

Replika doesn't support video generation, so you'll need to look elsewhere.

Voice Generation

Muah.ai

The voice quality is clear and doesn't sound like a robot. During conversations, the AI speaks naturally, but there's a catch: while the AI can change its tone, it can't express emotions.

But here's what annoyed me: the narrator and your AI girl share the exact same voice.

For US phone numbers, there's also a phone call feature that lets your AI girl ring you up, but you'll have to subscribe to the most expensive plan.

Replika

Replika offers only three voice options. Whether you're flirting, joking, or having a serious chat, your AI girlfriend speaks in the same robotic tone.

Privacy

Muah.ai

Your conversations aren't as private as you might think. Yes, they say they use end-to-end encryption. Strangely, this isn't mentioned anywhere in their privacy policy.

The biggest red flag? In October 2024, Muah.ai suffered a major data breach. User chats were stolen. That's not just a minor hiccup - it's a serious privacy failure.

The one bright spot? Your credit card statement will simply show "Usweixin Cardshop AI" - keeping your AI relationship private from prying eyes.

Replika

Your messages are secured and encrypted, and your data is stored with multiple layers of protection.

Basic data is shared with service providers, but your conversations remain private.

Your bank statement will show the charge as 'Replika.