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Pi vs HammerAI
Pi edges HammerAI on our editorial score (4.0 vs 4.2), but Pi is the stronger pick if you want live voice calls, while HammerAI fits better if voice notes or image sharing or custom characters matter more.
0| Pi0 | HammerAI0 | |
|---|---|---|
| Editor score | 4.0 / 5 | 4.2 / 5 |
| Price | Free | $9/mo |
| Price band | Free | Under $10/mo |
| Free tier | Yes | Yes |
| Price detail | Free, with no usage limit and no paid tier — no card required. | Free: 600 cloud messages/day, unlimited chat on locally run models. Pro tiers $9/$18/$35 per month for larger cloud limits. Verified on hammerai.com/pricing. |
| Adult content | No adult mode | No adult mode |
| Voice | Live calls | Voice notes |
| Images | No | Yes |
| Video | No | No |
| Memory | Yes | Yes |
| Custom characters | No | Yes |
| Companion types | Any character | Any character |
| Platforms | Web, iOS, Android | Web, Desktop, iOS |
| Runs locally | No | Yes |
Pi — our take
Completely free, genuinely warm, and no upsell wall. Not a roleplay product, but an excellent listener.
- Entirely free with unlimited voice
- Consistently rated the most empathetic free model
- No ads
HammerAI — our take
The most generous free tier in the category: unlimited chat on locally run models, 600 cloud messages a day, no card required.
- Unlimited free chat with local models
- Group chat, lorebooks and personas
- Open-source with desktop apps
Pi vs HammerAI — common questions
Which is cheaper, Pi or HammerAI?
Pi is the cheaper of the two at Free, against $9/mo for HammerAI.
Which one has a free tier?
Both do — you can try either without paying.
Which remembers conversations better?
Both keep context across sessions. The practical difference is elsewhere: voice support differs between them.
Which handles adult content differently?
Pi: No adult mode. HammerAI: No adult mode. This directory is SFW — we record whether a mature mode exists so you know before signing up, and we describe no explicit material.