AI Character Apps with Advanced Memory and Context

“Memory” in a chat app can mean two different things: how much of the current chat the AI can read at once, and notes the app keeps about you and your story. This page explains the difference in plain words, then lists how each service describes its memory in its own words. We have not tested any of them.

Updated 2026-10-21

Bring your chats to Castmanor

Paste a chat or add screenshots, and your character picks up where you left off. It is free, for adults.

Start now

Free. Adults only. Everyone here is an AI character.

AI chatbots that remember past conversations

There are three common ways a chat app can remember. A service may use one or more of them.

The first is the context window. An AI model can only read a limited amount of text at once, counted in tokens. When a chat grows past that limit, the oldest text drops out. JanitorAI’s help article says its model reads around 8,000 to 9,000 tokens and that overloading it makes the bot forget what happened a few replies ago. SpicyChat’s documents say token limits depend on the AI model you choose and your subscription tier.

The second is saved notes. The app writes down facts about you and your story, and feeds them back into later chats.

The third is lore you write yourself: a list of entries about the world, other characters, places or rules that the app brings in when a keyword comes up. SpicyChat’s Lorebook is described as “your character’s world memory.”

Companion apps with persistent user memory

This table says how each service describes its own memory. “Not checked” means we did not read that part of its pages. Rows are in alphabetical order.

Service	How its pages describe memory	Who controls it, as far as the pages say
Castmanor	Notes built from your chats: facts about you, moments you shared and a running summary of your story together, plus a simple level for how close you and each character have become. The notes can include sensitive things you tell a character.	You can see, edit and delete the notes on the Memory page. They stay until you delete your account.
Character.AI	Pinned Memories save messages you pin in a chat, which you can view in Chat Details. The (c.ai) lite FAQ mentions 30 memory pins against 15 on the free plan, and says the full memory suite, including private Lorebooks, is part of c.ai+.	You choose which messages to pin.
JanitorAI	A context window of around 8,000 to 9,000 tokens. The help article suggests a short memory template: environment, relationship dynamic, current plot points, notes on the character and on you, and important past events.	You write and keep the memory text.
Kindroid	Its FAQ says a Kindroid has long term memory recall over everything you talk about. It also says a long backstory makes short term memory worse, because each letter and symbol in the backstory takes room from the short term context.	Not checked.
Nomi	Its wiki has a Memory section covering short-term, medium-term and long-term memory and an Identity Core, plus a Mind Maps system.	Not checked.
Replika	Its site says it “always remembers what matters,” with interests and relationships as examples.	Not checked.
SillyTavern	Its documents describe World Info (lore entries), a Data Bank and per-character chat files. It is software you run on your own computer.	You write and manage the entries and the files.
SpicyChat	Lorebooks, which can be private or public and attach to a character, and token limits that depend on the model and tier.	You write the Lorebook entries.

These are the services’ own descriptions. Whether a memory system works well in a long story is something only a long chat can show.

Getting more context retention out of any app

Put the most important facts first in a character’s definition. Character.AI’s guide to writing a definition says the AI reads top to bottom, so what comes first matters most.
Keep definitions and backstories short. Kindroid’s FAQ and JanitorAI’s memory article both say a long text takes room from the chat itself.
Write a short running summary of the story every so often, and keep it where the service lets you store memory. JanitorAI’s article suggests bullet points and short phrases.
Pin or save the few messages that hold your key facts, where the service has a feature for it.
Check what the app has saved about you, if it shows you. Fix anything wrong.

How these memory systems compare with Character.AI’s

Character.AI’s documents describe memory mostly as messages you pin yourself, plus the character’s definition, with a larger memory suite on the paid plan. The other services above describe saved notes, lore entries or a mix.

If you move from Character.AI, remember that what the old service saved does not move by itself. Copy your pinned messages and notes by hand. Castmanor and some other services can read a pasted chat, screenshots or a file and build their own notes from it. See apps that can import Character.AI chats and how to back up your characters.

Questions and answers

Is there a Character.AI alternative that remembers me?

Several services say they keep memory. Castmanor keeps notes about you and your story that you can see, edit and delete. Kindroid, Nomi and Replika describe long-term memory in their own pages.

Is there a Character.AI alternative with long memory?

Long memory depends on the context window and on saved notes or lore. See the table for how each service describes its own.

Is there a Character.AI alternative with better memory?

We have not tested memory, so we do not rank it. The table lists what each service says, and who controls the memory.

Which AI friend app remembers everything?

Kindroid says it has long term memory recall over everything you talk about. No service can promise that nothing is forgotten: memory has limits, and long texts can crowd out the chat.

Is there an AI chat app that remembers past conversations?

Yes, several say so. Castmanor saves notes from your chats and keeps your chats until you delete your account.

Is there an AI roleplay app with memory?

SpicyChat has Lorebooks, JanitorAI has a memory template you write, SillyTavern has World Info, and Castmanor builds notes from your chats.

Related guides

Sources

We opened these pages on 2026-10-21. Pages can change after that.