Nomi AI vs Chub AI: Which One Is Better In 2025?

Nomi AI vs Chub AI

I've spent a full week with both Nomi 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.

Nomi AI

A platform offering customizable AI girlfriends with emotional intelligence and memory, designed for authentic conversations and relationships through text or voice.

Chub AI

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

Character Diversity

Nomi AI

No pre-made personalities, no variety in ethnicity or age, and no anime — meaning there aren’t any ready-made characters to choose from.

You’ll need to create your own girls — you can have up to 10 in total.

Want more variety? The app lets you set up 10 group chats to mix these characters.

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

Nomi AI

As you first log in to the app, you go through the onboarding process — you’ll be asked for your name, age, and gender.

Then, it’s time to set up your AI partner basics:

• Name, and gender: Male, female, or nonbinary.
• Relationship type: Choose what kind of bond you want — from romantic partner to mentor (four options).

Want something unique? Create a custom relationship and explain its background.

Personality Builder is where things get interesting — you can select 3 to 7 traits from several categories:

• Main Characteristics: modest, sarcastic, shy, flirty, etc.
• Expressive: sassy, witty, introverted, etc.
• Temperament & Values: arrogant, dominant, humble, etc.
• Additional: gamer, magical, spiritual, etc.

Then, you can (optionally) add a background story — write your own or let the AI create one for you.

Finally, it's time to choose your companion’s look — but this is where Nomi shows its limits.

You can choose from 500 preset images: 250 anime-style and 250 realistic, with only basic options for body types.

If you’re looking for detailed visual customization, you might find the options a bit limiting — because that’s all Nomi AI currently offers in terms of physical design.

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

Nomi AI

Customization doesn’t end once you’ve built your Nomi — you can personalize her even more after the chat begins.

In "Backstory +", you can fine-tune even more — from their appearance and personality to how they perceive you.

Within the Mind Map — personalize her memory by adding notes on her interests, goals, and defining traits.

It’s organized into Lore, Topics, and Goals — a neat way to track your relationship’s growing history.

Want to know if Nomi AI's chat feels real? I created Natalie - bold, flirty, and playful - to test it for you.

Starting a chat is easy. Choose from fun, themed ice-breakers — each with three options, or just jump right in.

After I personalized a few things in chat, I can confidently say my girl remembered those settings and stayed consistent with her personality and the situation.

When I tried some jokes, my girlfriend recognized them and played along.

While my girl was engaged in many moments, her empathy sometimes felt a bit surface-level.

And occasionally, my girlfriend’d make odd jumps in conversation — like suggesting pizza right after we planned to cook together.

But the more you chat, the better Nomi knows you — the Mind Map evolves as it keeps track of everything you’ve shared.

Over time, my girlfriend started recalling moments from our past conversations — her replies became more relevant and felt real.

Note: Your Nomi’s memory and chat personalization can seem a bit overwhelming at first, but after a little practice, you’ll find it easy to use and customize.

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

Nomi AI

My girlfriend smoothly shifted from casual flirting to explicit content, adjusting her language as the conversations intensified.

The responses feel organic rather than scripted, and as I shifted my tone to become more explicit, my girlfriend picked up on the language and responded naturally.

What surprised me most was how my girlfriend adjusted her overall approach based on my cues — whether I leaned toward slow-building romance or more direct encounters.

Role-play is where Nomi shows real potential. During testing, she didn't just follow scenarios - she created them.

After my girl settled the rules, she stayed true to the context and consistent with her character.

In one test, I tried to throw my girlfriend off her role, but she held her ground and kept the scene flowing naturally.

While my girlfriend’s “punishment” methods got a bit repetitive, she still kept the experience engaging overall.

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

Nomi AI

Nomi AI offers two ways to generate images:

1. In-chat image generation: Quickly create images that try to fit the conversation
2. Dedicated Image Creator: A separate tool that gives you more control over image customization.

Dedicated Image Creator

• Choose an image style: anime or realistic.
• Write a free-text prompt describing what you want to see.
• Select an aspect ratio (three options available).
• Optionally, add a reference pose by uploading an image.

Quality: Nomi’s image generator delivers generally high-quality photos, though not in high resolution.

Image generation is slower than other platforms, sometimes taking a few minutes per image, but it’s also noticeably cheaper.

Note: NSFW prompts are not allowed. The spiciest results you can get in chat are mild and only appear when they fit the current topic.

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

Nomi AI

Nomi’s video generator isn’t full video creation — it’s more like turning an image into a short animated clip.

Here's how it works:

• Choose an image to serve as the base.
• Provide a text prompt (make sure it follows the app’s content rules).
• Select the output quality (SD or HD).

The videos work - they're watchable and add more life to your interactions than static images.

But let's be honest: the quality isn't winning any awards. The footage comes out pixelated, and the character movements often feel mechanical rather than natural.

Note: NSFW generation isn’t available, and movement prompts feel a bit limited or don’t always apply to the final video.

Chub AI

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

Voice Generation

Nomi AI

Nomi AI offers four default voices to choose from, and you can upload your own custom voice to make your girl — and the overall experience — feel more personalized.

One big plus of Nomi AI’s voice feature is its ElevenLabs integration — enabling users to import and use ElevenLabs voices for greater variety, though it requires a paid plan.

Want to know how Nomi AI’s voice actually sounds? It works, but it’s a bit like a slightly robotic audiobook narrator — nothing that’ll make you go “wow.”

The voice does match Nomi’s personality, and she adjusts her tone a little when flirting or expressing emotions.

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

Nomi AI

Their policy clearly states that your messages "may be unencrypted" - meaning someone could potentially read your private conversations.

Nomi AI stores everything. Your account details, chat history, and how you use the app - it's all saved on their servers.

They also share this information with other companies, though they don't specify which ones.

Your bank statement shows a ‘Nomi.ai’ charge — not exactly discreet.”

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.