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

Secrets AI vs character.ai

I've spent a full week with both Secrets 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.

Secrets AI

A platform that lets you build a personalized AI girlfriend, offering chat and phone call interactions along with image and video generation of your companion.

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

Secrets AI

Secrets AI gives you 94 realistic AI girls to choose from.

No anime characters here — just lifelike digital partners.

Most characters fall into a narrow demographic: predominantly white women in their 20s with slim builds.

I did find a handful of Latina, Asian, and Black characters, plus a few mature options and curvier body types — but these are exceptions rather than the norm.

If you're looking for representation beyond young, slim characters, you may find the selection somewhat restrictive.

The selection interface is straightforward, with a search bar and filters for gender, popularity, and recency that make finding your ideal match quick and hassle-free.

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

Secrets AI

You begin creating your character by picking a gender.

Profile and Appearance Editor is straightforward, allowing you to customize:

• Name, location, age
• Ethnicity (9 choices)
• Skin tone and eye color (many options)
• Facial features: eye color, hair color, hairstyle (wide variety)
• Body type (6 options)

Then you can choose from six voice options to shape how your companion sounds.

After that, you can review your girl and add additional details via free-text.

Once you create her, you’ll get four image versions of your girl to choose from, plus one free regeneration if needed.

Personality setup happens only before you start chatting with her:

• Profession (5 options)
• Personality type (5 traits such as “warm and nurturing” or “ambitious and driven”)
• Hobbies (optional)
• Additional traits or details using free-text input

Note: Several ethnicities and body types look very similar, resulting in fewer meaningful choices than advertised. Additional characters also cost 1,000 Moments each.

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

Secrets AI

You get three different AI models to choose from, each offering its own style of interaction.

There are also 12 conversation starters, half casual - half spicy — to help kickstart natural interactions.

The emotional intelligence impressed me—my girl started with warm engagement, asked relevant follow-up questions, and gradually became more playful as we talked longer.

My AI girlfriend remembered what we actually discussed, rather than creating fake memories.

My girl stayed consistent even when I tried to confuse her or break character.

When I brought up relationship concerns, my girlfriend responded with calm, grounded reassurance, acknowledging everything without making exaggerated promises.

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

Secrets AI

My girlfriend was open about sexual topics but maintained a consistent PG-13 boundary.

Even when I pushed toward explicit territory, my girlfriend kept things suggestive rather than graphic—creating a tease that worked surprisingly well.

The roleplay feature is where Secrets AI truly shines. I tested three scenarios: teacher, landlord, and boss.

In both the teacher and landlord scenarios, my girl built tension gradually and stayed firmly in character.

The boss scenario felt somewhat rushed, but remained engaging throughout.

What matters is that my girlfriend maintained character consistency while keeping the interactions hot.

Not everything was perfect: my girl phrasing sometimes confused me, especially when she switched between ‘someone’ and ‘they’ when talking about past partners.

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

Secrets AI

There are two ways to generate images:

1. Dedicated Image Creator
2. In-chat Generation

In-Chat Generation: Type "/send me" followed by your free-text prompt for what you want to see.

Dedicated Image Creator: A separate tool with more control and customization.

• Character selection: Pick from the full roster
• Free-text prompt: Write what you want to see
• Preset options: Choose from a small set of presets

The limitation? Only four presets, so you’ll be relying on free-text prompts and your own experimentation.

After testing extensively, I can confirm the quality is good—not perfect, but definitely impressive.

You’ll notice occasional glitches, particularly with hands, and some upper-body proportions can look slightly elongated in certain poses — but these issues aren’t deal-breakers.

You can also unlock media bundles with extra images and videos to expand your companion’s visual presence.

Each bundle includes 17 to 34 pieces of media, mostly NSFW content.

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

Secrets AI

This is a photo-to-video feature rather than full video generation. Here’s how it works:

• Choose an image from your generated collection
• Write what you want to see using a free-text prompt

The videos look good, move smoothly, and stay natural most of the time.

Yes, you'll notice some AI glitches if you look closely, but they rarely distract from the experience.

Note: There are no preset options here, only a short guide on how to write effective prompts for 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.

Voice Generation

Secrets AI

Secrets AI delivers voice generation that sounds genuinely human. No robotic tones or awkward pauses—just smooth, realistic dialogue.

When discussions turn flirty, the voice immediately responds with appropriate tonal shifts—becoming more playful and expressive.

One limitation: voice features only work through calls, not recorded messages.

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

Secrets AI

• Looking for encryption details? I found none.
• Searching for data retention policies? Nothing concrete.
• Wondering if they share your intimate chats with third parties? They don't say.

The app clearly stores your conversations, but it provides zero details about what they keep, for how long, or who might access them.

The only privacy feature that actually works is discreet billing - charges appear as "Sun Clinical Laboratories" on your statement.

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."