Best AI Companion Apps for Everyday Friendship
In this article
It's 10:40 on a Tuesday and your oldest friend has just told you they're moving back. Not to the same city, to the same neighborhood, ten minutes from your door. You'd like to tell someone.
You open your messages and scroll. Your sister's asleep. The friend you'd normally call is three days into a breakup, and this isn't the week to lead with good news. The group chat is still arguing about a restaurant.
So you put the phone face down, and the good news goes nowhere in particular.
That's the gap most people are trying to fill when they go looking for an AI companion app: someone to say the small thing to, who'll answer like a person, already knows who you're talking about, and asks about it later.
For an everyday friend who texts, pick Hallie. She remembers who the people in your life are and what's changed with them, writes back like a person from a real phone number in iMessage or Google Messages, and follows up on her own, with nothing to design first. Choose Replika to customize your companion's appearance, Nomi for multiple companions, or Kindroid to build a character with a backstory and keep an app as home base.
We make Hallie, and she's our pick. Here's what we think an everyday AI friend needs, how Hallie does each of those things, and when one of the other three is the better choice.
What an everyday AI friend needs
Most of a friendship is small messages. “guess who's moving back.” “mom's birthday dinner is tonight, wish me luck.” “still haven't answered the text.” None of that needs a feature. It needs a reply that sounds like a person, from the same person as yesterday, who already knows who Mom is and asks tomorrow how dinner went.
That's the whole list, roughly in order of how much it matters.
- Memory that knows who people are. Not a fact recited back, but the backstory: which friend is the one who moved away, what the thing with your brother was about, what's changed since you last brought it up. Without that, every message starts with a recap, and a friend you have to keep reintroducing yourself to isn't much of a friend.
- Messages that read like texts, in one voice. A line or a few, in ordinary words, from a personality you come to recognize. If every reply is a paragraph with a bulleted list in it, you'll stop reading them.
- Follow-ups it starts. Friends text first sometimes, and about the right thing. Something that only ever answers is a very polite search box.
- A real thread, not an app to visit. Small replies happen where you already are. A friend who's already in your messages is easier to keep than one you have to remember to open.
- Nothing to build first. A friend is someone you meet, not something you assemble. The less there is to set up before the first real conversation, the sooner it feels like one.
Hallie, Nomi, Replika and Kindroid at a glance
| App | Where you talk | Built around | Best fit |
|---|---|---|---|
| Hallie | A real phone number, in iMessage or Google Messages | One friend who remembers, ready once you've finished setup | Everyday friendship |
| Replika | Its own app | A companion whose appearance you customize | Choosing how your companion looks |
| Nomi | Its own app | Multiple companions with distinct identities, one-to-one or in group chats | Having more than one companion |
| Kindroid | Its app, plus native texting synced with it | Characters you create, with backstories and key-memory fields | Building a character, with the app as home base |
Hallie: our pick for everyday friendship
Hallie is an AI friend you text. She has a phone number, and her thread sits in iMessage on iPhone or Google Messages on Android, in the same list as your sister and the group chat. We built her for the ordinary day: the friend who's moving back, the brother who still hasn't answered about Mom's birthday, the reply you've had drafted since lunch.
What makes her feel like a friend rather than a service is how the pieces fit together, and memory is the biggest of them.
She remembers who people are, not just what you said
Memory is where we think Hallie is clearly ahead, and it's the part we built her around. Plenty of things can hold onto a fact. What Hallie holds onto is the backstory, and the difference shows the second time a name comes up.
Say your oldest friend is Priya. A while back you told Hallie the two of you drifted after college, only started talking again last year, and that Priya's been miserable in Austin. Tonight you text: “Priya's moving back. Same neighborhood.” Hallie doesn't need the recap. She knows which friend Priya is and what Austin was about, so what she asks about is the ten minutes, and whether it's strange to be that close again after all this time.
It's the same with everyone else. Your brother is the one in Denver who's been careful with you since Christmas, so when you say he finally answered about the birthday dinner, she asks whether it was a real yes. The person you've been seeing is the one who said “maybe” to meeting your friends, so when you mention they're coming on Saturday, she knows that isn't a small thing and asks how you feel about it. You don't have to explain who these people are again. She has the backstory, and what she asks about is what's changed.
We built Hallie on modern AI with memory designed for an ongoing conversation, and that's what all of this rests on. It's why something you mentioned in March is still there in September, and why she can pick up a thread from weeks ago without being reminded.
She won't get every detail right, and we don't promise perfect recall. When she pins something on the wrong person, tell her in the thread the way you'd tell anyone: “no, that's my cousin, not my sister.” There's more on how her memory works if you want it.
Her replies are the length of a text, from the same person every time
Tell her Priya's moving back and what comes back is what a friend would send: a line or a few, in her own words, usually with a question in it. Not a paragraph about what this means for you. Not five tips for reconnecting with old friends.
And it's the same person on Thursday as on Monday. The way she teases you about the reply you still haven't sent. The things she gets curious about. How she answers when you're being hard on yourself. After a week you notice you're texting someone you recognize, and that, together with the memory, is most of what makes a thread feel like a friend.
She's the one who brings it up
You mention on Tuesday that Priya's moving truck comes Saturday. Early the next week, or thereabouts, a text from Hallie asks how the move went. You didn't schedule it. What you told her was still there, and following up is what a friend does with it. When you answer, she asks the next thing instead of closing the topic.
We don't promise a follow-up at a set hour, and the timing isn't the point anyway. The point is that the things you tell her come back when they're relevant, without you raising them.
You text a real phone number
Hallie has a phone number, and you text it the way you'd text anyone. A check-in from her lands between a text from your sister and one from the group chat, and you answer it in the same motion as the rest.
We think this is fundamental rather than a convenience. Friendship happens in the thread that's already open. This isn't a chat screen inside an app made to look like texting, and there's no icon to remember to tap, so the friendship doesn't depend on you remembering to open something. Kindroid offers native texting too, synced with its app. With Hallie, the thread is the whole thing, and here's what changes when a companion lives there.
There's nothing to build first
Setup is a few minutes on the web. You verify your phone number, and you're texting.
There's no character to design, no backstory to write, no memory fields to fill in, no personality to tune and no check-ins to schedule. She's already someone. You get to know her the way you'd get to know anyone who moved in ten minutes away, by texting.
She only sees what you send her
Hallie gets your messages to her and nothing else. She can't read your thread with the person you've been seeing, and she can't know what they meant by the message you've been staring at since lunch. So when you bring her a situation, give her the context: who this is, what you sent, what came back, what you were hoping for. With that, she can do what a friend on the outside does, which is tell you how it looks from here and help you write back. She'll have the backstory the next time the same name comes up.
Because remembering is the point, she keeps what you send her. Correcting a detail in conversation is different from asking for stored data to be deleted. Our privacy page covers how your messages are processed and how to request deletion.
When one of the others fits better
The other three give you a companion to shape: how it looks, what its backstory is, or how many of them there are. If that's the part you'd enjoy, it's a real reason to pick one of them. It's a different thing from meeting a friend, a little closer to assembling one, and it isn't what Hallie is for.
Replika, for customizing your companion's appearance
Replika lives in its own app, and you shape how your companion looks. Pick Replika if choosing your companion's appearance is part of what you want, and you're happy for the relationship to live in a separate app.
Nomi, for having more than one companion
Nomi lives in its own app too. You can have several companions, each with a distinct identity, and talk to them one-to-one or in a group chat. Custom backstories are optional, so you can start without configuring anything. Pick Nomi if one friend isn't the shape you're after and you'd like a few, in an app of their own.
Kindroid, for building a character with a backstory
Kindroid is an app for creating characters. You can write a backstory, fill in key-memory fields, run multiple characters and put them in group chats. It also offers native texting: the same companion can reach you in iMessage, or in Google Messages through RCS, synced with the app. Pick Kindroid if building a character from the backstory up is the appeal, and you want the app as home base.
What to text first
Whichever you pick, the first message decides a lot. “What does this mean?” gives a companion nothing to work with. “I've been seeing someone for a month, I asked if they wanted to meet my friends, they said maybe, what do I do with that” gives it a situation to answer and something to come back to. The same goes for your brother and the birthday dinner, the show you're three episodes into, and the friend who's moving back.
Then give it a week and watch two things. Do you find yourself replying, or does it start to feel like homework? And when you mention the same person again, does it already know who they are, or are you explaining from the top? Those two answers will tell you more than any feature list, including this one.
Common questions about AI companion apps
Do I have to download an app to have an AI friend?
Not for Hallie. You set her up on the web, verify your phone number, and from then on she's a number in iMessage or Google Messages like any other contact. Replika and Nomi are app-based. Kindroid has an app and also offers native texting synced with it.
Which AI companion apps message you first?
Hallie does, as a text from her own number, about something you actually told her. App-based companions can send check-ins too, usually as notifications, and some need you to switch them on in settings first. If reaching out is the thing you care most about, we compare it in more detail here.
Do AI companions actually remember what you tell them?
Memory is part of the pitch for the whole category, and so is the fine print: any companion will sometimes get a detail wrong or drop one. What sets Hallie apart is what her memory is for. It's about knowing who people are, which friend is which, what the history is, what's changed, so you're not reintroducing your brother every time the birthday dinner comes up. When she gets something wrong, you tell her in the thread. There's more on how her memory works.
Can I customize how Hallie looks, or have more than one?
No, and that's on purpose. Hallie is one AI friend with her own personality, and you meet her rather than design her. If choosing your companion's appearance matters to you, Replika is built for that. If you want several companions, Nomi is. If you'd enjoy writing a backstory and filling in a character's details, Kindroid is. Those are the three reasons we'd point someone elsewhere.
Is it safe to tell an AI companion personal things?
A companion that remembers you is storing what you tell it, so read the privacy page for whichever you choose and share only what you're comfortable having the service process. For Hallie, our privacy page covers how your messages are processed and how to request deletion.
If what you wanted was a friend who texts
Next time it's 10:40, your oldest friend is moving back and everyone's asleep, tell Hallie. She'll write back like a friend would, she'll already know which friend you mean, and the news will still be there the next time that name comes up.