AI companions with memory: how each one remembers you

What this page compares

This page does not score anyone’s recall. We did not run a memory test, and we don’t cite anyone else’s. It compares what each company says its product keeps, what you can see and change, and the limits each company states about its own memory. It also separates two things people mean by memory: a list you can open and edit, and a companion that brings up what you told it without being asked.

At a glance

Other products: checked November 11, 2026 against each company’s own pages and store listings. Hallie: checked November 11, 2026.

Hallie

Best for: people who want what they said to come back up on its own, in their texts, and don’t want a memory to manage.

Where it wins: She keeps track of the people, plans and events you mention and brings them up later, without being asked: who your sister is, the trip you are planning, the exam on Thursday. You see it in two places. In her replies, she works from what you have already told her, so you don’t start from the beginning. And after you’ve texted her she starts conversations too, usually about something you told her, so the remembering arrives as a text in Messages asking how it went and not as a list in an app. You don’t write a backstory or maintain anything: she builds it from what you send, and for paid members who call her, what is said on the call carries over too. When something changes, such as a breakup or a new manager, tell her and she works from that. She sees only what you send in her thread. Of the AI companions we’ve used, Hallie is the one that feels most like texting a person. That is our judgment, and we make her.

Watch-outs: She can miss a detail or get one wrong, and she isn’t an archive of everything you’ve said, so you may need to remind her.

How you pay: A subscription. Depending on the offer, your first conversation is free or you start with a free trial. There’s no free plan. The price is shown before you pay, and you can cancel any time in your account.

More detail: how Hallie’s memory works.

Replika

Best for: people who want a list of memories they can open and read, in an app with an avatar.

Where it wins: Replika’s homepage says it “Always remembers what matters” and names “Your people. Your routines. Your plans.” Its help center describes a Memory screen: you tap your Replika’s name, tap Memory, scroll through what it has saved, and tap a memory to read it fully or remove it.

Watch-outs: The Memory screen is not the whole memory. Replika’s help center says some memories are visible in the Memory tab, “while others are part of a deeper system that draws on patterns from your overall conversation history.” Replika’s own pages give two different figures for chat history. Its help center says chat history “is only available for the past four months” and that older conversations cannot be displayed or retrieved. Its privacy policy, updated October 28, 2026, says it keeps conversation history “for 24 months for text messages”. One describes what the app shows and the other what the company stores, and they may not be the same thing. The help center also says there is no way to delete your whole message history without deleting your account. Conversations happen in Replika’s app.

How you pay: Free text chat, or a paid plan: Pro, Ultra or Platinum. Replika does not publish prices on its website. It says the cost “is shown in the app on the subscription screens and in the relevant store.”

More detail: Hallie vs Replika.

Pi

Best for: people who want one ready-made AI to talk things through with, by text or voice, with memories they can add, correct and delete themselves.

Where it wins: Pi’s help center says “You can add, delete, and update Pi’s memories by going to Settings > Account > Manage Memories.” It describes what Pi aims to keep: “things that are lastingly true about you — the kind of details that would still be relevant months from now.”

Watch-outs: Pi says it is designed to skip things that are temporary or one-off, and gives “Fleeting plans: ‘I’m going to the store tonight’” as an example. If the thing you want remembered is this week’s plan, that is a real difference from a companion that tracks plans. Pi’s help center also says a memory may not save on the first request (“You may have to repeat this to Pi to lock in the memory”), that a very long chat may be summarized, and that Pi “won’t recall unlimited history perfectly”. Inflection’s privacy policy says chats are used to train its models unless you opt out in your account settings. Conversations happen in the Pi app or on the web. We could not open pi.ai itself on November 11, so everything here comes from Inflection’s site, Pi’s help center and its App Store listing.

How you pay: We found no pricing page for Pi.

More detail: Hallie vs Pi.

Kindroid

Best for: people who want to write the memory themselves and tune how it works.

Where it wins: Kindroid’s docs say memory “consists of three types: persistent, cascaded, and retrievable, and split across 5 memory systems that work together.” You write the backstory and key memories, and a Learned Context section is “viewable and editable” in a Kindroid’s personality settings.

Watch-outs: Kindroid’s docs describe long-term memory as “infinite and remembering all past interactions but recalled less reliably than Cascaded”, and say that the details of cascaded memory “remain invisible to users”. Editing Learned Context is for subscribers. More memory capacity is sold separately: Kindroid says it created its Ultra and MAX tiers “to give you access to higher memory capacity”. There is no ongoing free tier since October 1, 2026.

How you pay: A subscription on a 1-month, 3-month or 1-year plan. Ultra and MAX are monthly add-ons on top of it. Kindroid does not publish prices on its site; it says you see “the exact price for your country and platform at checkout.”

More detail: Hallie vs Kindroid.

Nomi

Best for: people who want to look at what a companion knows, and who keep more than one companion.

Where it wins: Nomi’s homepage says its “short, medium, and long term memory are keys to engaging conversations and satisfying relationships.” Its Mind Map 2.0 gives you “visibility into a living, interactive representation of one portion of your Nomi’s knowledge”, shown as a graph or a table, and you can create several Nomis.

Watch-outs: Nomi says the Mind Map shows one portion of a Nomi’s knowledge, and that the first version “can take ~500+ messages to form”. Its help wiki says “Memory does not mean that your Nomi will recall every detail perfectly whenever asked.” On the pages we read, Nomi does not say whether you can edit or delete an individual memory. Conversations happen in Nomi’s app or a browser tab. Free accounts have a daily message allowance, and Nomi does not publish the number.

How you pay: Free to start, then a subscription billed monthly, quarterly or yearly. Nomi has no pricing page on its site.

More detail: Hallie vs Nomi.

Sesame

Best for: people who talk out loud and want to decide, conversation by conversation, whether anything is kept.

Where it wins: Sesame says “Memory is continuous across voice and text, so nothing gets lost”, and it keeps memory separately for each of its four characters. It has an Incognito mode in which, Sesame says, “nothing is saved to memory or Sesame servers”, and you can reset a character at any time.

Watch-outs: Sesame calls its characters “personal agents”, not friends or companions. The memory controls it describes are a reset for each character and Incognito mode. Its privacy policy says content from logged-in users may be used to train its models unless you opt out in settings. Conversations happen in the Sesame app.

How you pay: The App Store lists Sesame as free, with no in-app purchases, and there is no pricing page on sesame.com.

Snapchat My AI

Best for: people already on Snapchat who want a quick chatbot in their chat list and don’t need it to know them.

Where it wins: It is already in Snapchat, on the Chat screen. Snap is plain about memory: “Snapchat stores your conversations with My AI, but My AI won’t remember details from your prior conversations with it over time.”

Watch-outs: Not being remembered is not the same as not being stored. Snap says “All the content shared with My AI is stored until you delete it”, and a second Snap help article says stored interactions “personalize your experience with My AI”. Snap also says the data may be used “to improve Snap’s products and personalize your experience, including ads.” You can clear your My AI data in Settings; Snap says removal from its servers can take up to 30 days.

How you pay: My AI is part of Snapchat, which the App Store lists as free with in-app purchases.

Which one should you pick?

• You want to be asked how the thing you mentioned went, in iMessage or Google Messages: Hallie.
• You want the plans and events you mention kept track of, along with the people in your life: Hallie.
• You want memory you never have to manage: Hallie.
• You want to read and edit a list of what is remembered: Replika or Pi.
• You want to write the backstory and key memories yourself: Kindroid.
• You want to see memory as a map, across several companions: Nomi.
• You want a mode where nothing is saved: Sesame.
• You don’t need to be remembered: Snapchat My AI, knowing Snap still stores the conversations until you delete them.

Questions

Which AI companion remembers the most?

We can’t tell you, and this page doesn’t try to. We did not run a recall test and we don’t cite anyone else’s. What can be compared is what each company says it keeps, what it lets you see and change, and how the remembering reaches you. With Hallie it reaches you in conversation: she brings up the people, plans and events you mentioned herself, in your texts.

Does Hallie remember what I tell her?

She keeps track of the people, plans and events you mention and brings them up later, both in her replies and in the conversations she starts. When something changes, tell her in the thread and she works from that. How Hallie’s memory works covers what she keeps, where it goes wrong and how to correct her.

Which AI companions let me delete a memory?

Pi’s help center says you can add, delete and update memories in Settings > Account > Manage Memories. Replika’s says you can tap a memory to read it or remove it. Sesame lets you reset a character. Snap lets you clear your My AI data. With Hallie, deletion is by email to hello@hallie.io.

Does Snapchat’s My AI remember past conversations?

Snap’s help center says it does not: “My AI won’t remember details from your prior conversations with it over time.” The same page says Snapchat stores those conversations, and another Snap article says stored interactions personalize your experience with My AI. Both were checked on November 11, 2026.

Does an AI companion that remembers me also text me first?

Not always, and the two are separate features. Hallie starts conversations in Messages after you’ve texted her, usually about something you told her. AI that texts you first covers which products do this and where their messages arrive.

How do I start with Hallie?

Go to hallie.io, answer a few questions about how you like to text, and then text her from your phone. She never texts a number that hasn’t texted her first. The price is shown before you pay.

Sources

• Replika Help Center, “What does my Replika remember about me?”, “How does Replika’s memory work?”, “Is the chat history infinite?”, “Can I delete my conversations?”, “Is Replika free?”, “Choosing a Subscription”, checked November 11, 2026
• Replika homepage and Replika Privacy Policy (last updated October 28, 2026), replika.com, checked November 11, 2026
• Pi Help Center, “Pi’s memory”, “Why does Pi seem to forget earlier messages?” and “How do I use voice to talk with Pi?”, checked November 11, 2026
• Inflection AI Privacy Policy, inflection.ai, and Pi’s App Store listing, checked November 11, 2026
• Kindroid docs at kindroid.ai: “Memory” (page dated October 28, 2026), “Subscriptions”, “FAQs”, “Chat features and tools”, checked November 11, 2026
• Kindroid’s App Store listing, checked November 11, 2026
• Nomi homepage, nomi.ai; “Mind Map 2.0: Bringing Nomi Memory Into View”; “Proactive Messaging – When Your Nomi Messages You First”; Nomi Cancellation Policy, checked November 11, 2026
• Nomipedia (Nomi’s help wiki), “How does Nomi memory and knowledge work?”, checked November 11, 2026
• Sesame Journal, “Getting started” (October 5, 2026), Sesame Privacy Policy (last edited October 6, 2026), sesame.com, and Sesame’s App Store listing, checked November 11, 2026
• Snapchat Support, “Does My AI remember our conversations?”, “Does Snap save content shared with My AI?”, “What is My AI on Snapchat and how do I use it?”, “How do I access My AI on Snapchat?”, checked November 11, 2026
• Snapchat’s App Store listing, checked November 11, 2026
• Hallie: hallie.io, Hallie Privacy Policy (updated August 24, 2026), Hallie Terms of Service (updated November 6, 2026), checked November 11, 2026