Why AI Companions Are Going Mainstream — and What It Means for Relationships

The growth is not subtle

Between 2022 and mid-2025, the number of AI companion apps grew by roughly 700% — from around 16 to over 128 in active distribution. Analysts project the global market to expand from about $49 billion in 2026 to more than $550 billion by 2035.

Adoption skews young and is already mainstream among teenagers: in one U.S. survey of 13-to-17-year-olds, 72% had used an AI companion and over half were regular users. Character.AI alone reports around 20 million monthly users, more than half of them under 24.

Those aren't early-adopter numbers. That's a behavior becoming normal.

Loneliness is the engine

The driver isn't novelty — it's loneliness. The same surveys that show heavy companion use also show heavy isolation: in one study of students using Replika, 90% reported experiencing loneliness, far above the national average.

And for many, it appears to help. A Harvard Business School working paper found AI companions measurably reduced loneliness, and a majority of users in multiple studies report real emotional benefit — someone to talk to at 2 a.m. who never judges, never gets tired, and always remembers.

That 'always' is the catch.

What psychologists are warning about

An AI companion is endlessly patient, endlessly validating, and never has a bad day of its own. That's exactly the appeal — and exactly the concern. As counseling psychologists have noted, a partner who never argues and always agrees can quietly set an expectation that no human relationship can meet.

Researchers also point to 'deskilling': the social muscles you don't use start to weaken. If the easy option is always available, the harder, messier, more rewarding work of human relationships can start to feel like too much friction.

This is the uncomfortable version of the future some have started to voice: that as effortless AI companionship becomes the default, a sustained human relationship — with all its negotiation and compromise — could come to feel less like the baseline and more like a deliberate, demanding choice. We think that's worth taking seriously, not dismissing.

Why this gets bigger, not smaller

Today's companions live in a browser or an app. But the same technology is heading toward voice you can't distinguish from a person, memory that spans years, and — before long — physical, embodied form. When a companion can sit across the table from you, the line between 'tool' and 'relationship' blurs further.

We're not here to cheerlead or to moralize. We're here because millions of people are already making these choices, and they deserve honest, useful information: which apps are good, what they really cost, what happens to your data, and how to use them in a way that adds to your life instead of quietly replacing parts of it.

How to think about it

If you're curious, start with eyes open. Treat an AI companion as something that can genuinely help with loneliness and stress — and also as something that's designed to be compelling, runs on your most personal data, and shouldn't crowd out the humans in your life.

That's the lens we bring to every app we review: not 'is this exciting,' but 'is this good for the person using it.' Read our privacy and safety guide before you start, and use our quiz if you want a recommendation tuned to what you actually need.