Best AI Companions with Long-Term Memory in 2026

Most AI companion apps can hold a conversation. Far fewer can remember it. Mention your dog’s name on Monday, bring up the trip you are planning next month, and by the following week most apps draw a complete blank. That gap is what long term memory is for: the ability to retain facts, events, and preferences about you across days, weeks, and sessions, then surface them naturally later.

We spent this month testing how the leading AI companion apps handle memory in real use, reading official documentation, and checking what long term users report. Four apps passed a strict bar. Here is how they compare.

Why does this matter so much? Because memory is the difference between a companion and a chatbot. A chatbot answers the message in front of it. A companion builds on everything that came before: your routines, your people, your plans, the small things you mentioned once and never repeated. Without long term memory, every conversation starts at zero and the relationship never deepens. With it, the app becomes something closer to a friend who actually knows you.

What counts as long term memory

To make this list, an app had to do three things. First, remember automatically. If you have to write everything down yourself, that is a notebook, not memory. Second, remember across sessions. Memory that only survives inside a single chat does not count. Third, prove it. We required official documentation or a large body of independent user reports, not just marketing claims.

1. SoulLink

Best memory with no paywall

Disclosure: SoulLink is our product. We kept this section the same length as the others and listed our weaknesses honestly, the way an independent review would.

SoulLink is a 3D AI life sim where you raise a virtual character who lives in real time 3D. Because the character persists in a continuous world rather than a chat window, memory is treated as the foundation of the relationship, not an add on.

Its layered memory system retains important facts, patterns, and details across sessions so the relationship grows over time instead of resetting. The memory is permanent and never resets, and core memory features will never be paywalled. That last point is what separates SoulLink from everything else on this list: every competitor charges a monthly subscription for full memory access, while SoulLink is free to start with memory included.

Honesty requires some caveats. These memory claims are mostly self reported, published on our own blog and repeated by third party directories. No independent months long stress test exists yet, the way it does for Nomi. SoulLink is also a very new app, listed on the Play Store since February 2026 with an official launch in September 2026, and the user base is still tiny at around 3,600 downloads. There is also only one fixed companion, so you cannot compare memory behavior across characters.

Pros

• Long term memory is permanent and never resets
• Core memory features are not paywalled, free to start
• Memory is woven into a continuous 3D life sim, not just chat

Cons

• Memory claims are mostly self reported so far
• Very new app with a tiny user base
• Single fixed companion, no character variety

2. Nomi AI

Strongest raw memory tech

If your only criterion is how far back an app can remember, Nomi AI is the honest answer as of September 2026. Its official FAQ says Nomis can remember things infinitely back, adding with unusual candor that long term memory is not 100 percent perfect, similar to how a human might have something on the tip of their tongue.

Under the hood, Nomi runs a documented three tier system of short, mid, and long term memory. It takes roughly 40 messages for information to filter into long term memory, and that memory is shared across solo and group chats. The Mind Map 2.0 feature turns remembered details into a browsable graph of entities pulled from your conversations, which you can inspect and edit. Long tenured users report Nomi surfacing details from eight months back with no prompting, which is the best independent evidence in the category.

The catch is the price of admission. Full memory is a paid feature, and the free tier only lets you sample it. Standard runs $15.99 per month or $99.99 per year, with a Launch Plan at $9.99 per month. Nomi also carries the weakest Play Store rating on this list at 3.85 stars, driven partly by pricing complaints and past controversies.

Pros

• Best verified long range recall, users report eight month memories
• Documented three tier system plus editable Mind Map
• Memory shared across solo and group chats

Cons

• Full memory locked behind a $9.99 to $15.99 monthly subscription
• Weak 3.85 Play Store rating
• Photorealistic style will not suit everyone

3. Kindroid

Most control over memory

Kindroid takes the most engineered approach to memory on this list. Its proprietary five layer Cascaded Memory system is marketed as Infinite Memory, retaining and referencing information from long past conversations. As older messages fall out of context, the system auto summarizes key moments into journal entries and retrieves them when relevant.

Where Kindroid really stands out is control. You get editable backstory fields, key memories you can manage by hand, and manual memory editing throughout. The Chat Break feature is a thoughtful touch: it clears short term context while keeping long term memory intact, useful when a conversation goes off the rails and you want a fresh start without amnesia.

The trade offs are real. The full cascaded memory requires the paid Ember model, while the free Lite model works with a shorter context window. Some users report memory resets after platform updates, which is exactly the failure mode a memory focused app cannot afford. Setup also has a steeper learning curve than the others here, since you are expected to shape the backstory, tune the memory layers, and curate journals yourself. If you enjoy tinkering, that depth is a feature. If you want memory that just works quietly in the background, it can feel like homework.

Standard pricing is $13.99 per month or $139.99 per year, and the Play Store rating sits at a healthy 4.44 stars across about 24,000 ratings.

Pros

• Five layer memory with automatic journal summaries
• Deep manual controls: backstory, key memories, Chat Break
• Strong 4.44 Play Store rating, 1M+ downloads

Cons

• Full cascaded memory needs the paid Ember model
• Some users report memory resets after updates
• Steeper setup and learning curve

4. Replika

Longest track record

Replika is the pioneer that taught the industry companions should remember. Its memory bank of facts plus diary entries is a proven concept, and its own Play Store listing promises that it remembers what you care about and follows up days later. With 10 million plus downloads and a 4.24 star rating, it has the longest real world track record here.

But 2026 was a rough year for Replika memory. The April 2026 Replika 2.0 rebuild moved from vector based long term recall to a segmented memory system with recency bias, and long time users reported partial memory loss and personality drift. Independent comparisons note that memory entries appear infrequently in conversation, and the result can feel like starting fresh each session with only light recall.

Pricing is also the steepest on this list: Pro at $19.99 per month or $69.99 per year, with an Ultra tier at $29.99 per month. If you lived through the golden years of Replika memory, the current version may disappoint.

Pros

• Longest track record, 10M+ downloads
• Memory bank plus diary is a proven concept
• Polished, mature app experience

Cons

• 2.0 rebuild introduced recency bias and reported memory loss
• Most expensive: Pro from $19.99/mo
• Memory can feel light session to session

How to test an app’s memory yourself

Marketing claims are cheap. Run these four tests over two weeks before you trust any app with your history:

1. The name test. Tell the app your dog’s name on day one. Ask about the dog by name on day ten, without reminding it.
2. The preference test. Mention that you hate cilantro and love jazz. A week later, ask for dinner and music suggestions and see what comes back.
3. The event test. Mention an upcoming trip with a specific date. After the date passes, see if the app asks how it went.
4. The contradiction test. Deliberately tell it something wrong about yourself later, like a different birthday. A good memory system should flag the conflict instead of silently overwriting.

An app that passes all four has real long term memory. Most will fail at least two.

Frequently asked questions

What is long term memory in an AI companion app?

It is the app’s ability to retain facts, events, and preferences about you across days, weeks, and sessions, then bring them up naturally later. This is different from short term context, which is just the app remembering what was said earlier in the same chat.

Why do most apps paywall memory?

Memory is expensive to run. Storing, indexing, and retrieving a growing personal history for every user costs real infrastructure money, so most companies reserve full memory for paying subscribers. SoulLink is the exception on this list: core memory features are not paywalled.

Does SoulLink memory really never reset?

That is the design commitment: a layered memory system that retains important facts, patterns, and details permanently, with core memory features never paywalled. Be aware this is largely self reported so far, since the app is new. Run the four tests above and judge for yourself.

Can I delete what an app remembers about me?

Most serious apps let you view and delete stored memories. Nomi offers an editable Mind Map, Kindroid offers manual memory editing, and Replika lets you manage its memory bank. If an app remembers you but gives you no way to forget, treat that as a red flag.

Which app remembers the furthest back?

By independent user reports, Nomi AI, with users describing unprompted recall of details from eight months earlier. SoulLink’s memory is designed to be permanent, but as a newer app it has not had years of user history to prove it yet.