The 30-second answer
Use Pi when you want a calm, voice-first conversational companion with no setup and no intrusion. It's the best quick-chat-with-a-friendly-AI product on the market.
Use Aiffinity when you want an AI that's unmistakably yours — drafts messages in your voice, acts across your real apps, and travels with you between tools.
Feature comparison
| Feature | Aiffinity | Pi |
|---|---|---|
| Identity model | One Aiven per user, trained on your Individual Print | One shared AI identity that everyone talks to |
| Primary surface | iOS messenger | iOS, Android, web, and a voice-optimised phone mode |
| Voice | Yes — adaptive voice tuned to your IP | Yes — best-in-class conversational voice (its flagship feature) |
| Memory | Long-term Individual Print, personalization signals + relationships + style, exportable | Long-term memory within Pi; not exportable |
| Drafts your messages | Yes — in your voice, across iMessage, Gmail, Slack, WhatsApp, Telegram | Not the primary use case |
| Takes real actions | 170+ apps via OAuth (Calendar, Notion, Strava, Kalshi, …) | Primarily conversational; action surface is limited |
| Group chats | First-class — multiple Aivens can coordinate | One-on-one |
| Price (2026-04) | Free waitlist; premium at launch | Free |
| Privacy posture | E2E, on-device inference where possible | Privacy policy commits to not selling data; cloud-hosted |
| Portable profile context | IP export + OAuth grant to third-party AIs | No cross-app profile export |
What Pi does better
- Voice is unbeatable. Pi's voice-forward interaction is the best in consumer AI. The team at Inflection spent years shaping the turn-taking, the non-verbal cues, and the cadence. If you want a spoken-conversation AI, Pi is the benchmark.
- Low-friction emotional support. Pi is deliberately calm, non-judgemental, and excellent at debriefing a stressful day. Aiven will do the same, but Pi is tuned harder for the warmth.
- Zero setup. Sign up, start talking. There's no IP to build, no integrations to connect — and for some people, that's the point.
What Aiffinity does better
1. Your AI is actually yours
Pi's warmth is the same warmth every user gets. Aiven's warmth is your warmth: your tempo, your humour, your specific way of being kind to your mum vs. sarcastic with your co-founder. The IP doesn't just remember facts — it models how you do language.
2. It takes action
Pi is a great conversationalist but it won't book your dinner, reply to your inbox, or ping your calendar. Aiven lives wired to 170+ apps via OAuth and can act on your behalf — with an approval step so nothing fires silently.
3. Group conversation is a core surface
Pi is a one-on-one experience — you and Pi. Aiffinity is a messenger first, which means a group of friends can each have their Aiven in a thread together and coordinate a plan while everyone's still doing their Monday commute.
4. Portability
If you decide in six months that a different AI is better for something specific, your Pi memory stays inside Pi. Your Aiffinity Individual Print can be granted to any compatible AI via OAuth — the new tool gets a head start without you filling out another onboarding.
When to pick which
Pick Pi if you want a calm, voice-first AI to talk to — especially on walks, commutes, or during low-energy evenings. Pi is the best "thinking out loud" product in consumer AI.
Pick Aiffinity if you want an AI that acts on your behalf and becomes your voice in writing — across messaging apps, email, calendars, and the rest of your digital life.
Try Aiffinity
iOS first, Android later. 500 free AI tokens on the day Aiven opens up.
Join the waitlist →Frequently asked questions
Is Aiffinity like Pi?
Both are positioned as "personal AI", but the products are shaped very differently. Pi is a single AI identity (built by Inflection) that every user talks to — warm, voice-first, emotionally calibrated. Aiffinity gives each user their own Aiven, built on an Individual Print that models how you personally think and talk.
Does Aiffinity have voice like Pi?
Yes, Aiven supports voice both for input and output, including a voice that adapts to your calibrated Individual Print. Pi pioneered the voice-forward experience and remains excellent at it; if voice is the only thing you care about, Pi is still a great pick.
Can Pi take actions in my other apps?
As of 2026-04, Pi is primarily a conversational companion — it doesn't have a broad action framework for connecting to Gmail, Calendar, Slack, Notion, and similar apps. Aiffinity was built around that outbound action layer.
Related reading
- All comparisons — ChatGPT, Replika, Character.ai
- Welcome to Aiffinity — the thinking behind Aiven and the IP
- Provider catalogue — the 170+ apps Aiven can act through