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Pi vs Z.ai
Pi edges Z.ai on our editorial score (4.0 vs 4.1), but Pi is the better fit if you want live voice calls and long-term memory; Z.ai has no clear edge there.
0| Pi | Z.ai | |
|---|---|---|
| Editor score | 4.0 / 5 | 4.1 / 5 |
| Price | Free | Free |
| Price band | Free | Free |
| Free tier | Yes | Yes |
| Price detail | Free, with no usage limit and no paid tier — no card required. | Web chat is free (checked 2026-09-30); GLM Coding and API plans are priced separately for developers. |
| Adult content | No adult mode | No adult mode |
| Voice | Live calls | No |
| Images | No | No |
| Video | No | No |
| Memory | Yes | No |
| Custom characters | No | No |
| Companion types | Any character | Any character |
| Platforms | Web, iOS, Android | Web |
| Runs locally | No | No |
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
Z.ai — our take
A capable free general assistant — the closest free peer to DeepSeek for everyday chat.
- Free frontier-model chat
- Fast responses
- No account friction to try
Pi vs Z.ai — common questions
Which is cheaper, Pi or Z.ai?
They cost the same on our recorded numbers (Free).
Which one has a free tier?
Both do — you can try either without paying.
Which remembers conversations better?
Pi retains context across sessions; Z.ai keeps context only within a session.
Which handles adult content differently?
Pi: No adult mode. Z.ai: 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.
Prices change. Confirm the current price and available plans on each site before subscribing. Affiliate disclosure.