Pi

Name: Pi
Author: Inflection AI

Inflection AI, US

⭐⭐⭐⭐ 4.1/5

Editorial estimate compiled from public vendor data — not a user-review average. How we rate

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📊 Quick Facts

Pricing ModelFree

Categorychatbots

Users10M+

Founded2022

HQSan Francisco, CA, USA

EmployeesNot publicly disclosed

Monthly Visits10M+

LanguagesEnglish, Spanish, French, German, Japanese, Chinese, Korean, Arabic

PlatformWeb, iOS, Android, API

DeploymentCloud

Data Snapshot2026-09-18

📝 About Pi

Pi is Inflection AI's personal AI assistant designed for emotionally intelligent conversation. Unlike task-focused AI tools, Pi prioritizes conversational depth, empathy, and personal support. Powered by the proprietary Inflection 3 Pi model with 8K context. Features 8 distinct voice profiles, persistent memory and personalization, multilingual support, and curated Discover feed. Consumer Pi remains completely free with no subscription. Enterprise access via Microsoft Azure following the 2024 Inflection/Microsoft deal.

💰 Pricing

Free

✨ Key Features

Best-in-class emotional intelligence and empathetic conversation8 distinct voice profiles with different tones and personalitiesPersistent memory: learns preferences and adapts over timeCurated Discover feed with daily conversation startersVoice-first design for natural walk-and-talk conversationsMultilingual support preserving emotional nuanceTask management: reminders and to-do listsAvailable on iOS, Android, Web, WhatsApp, SMS (13+ platforms)

🏷️ Tags

chatbotconversationalpersonal

⚖️ Pros & Cons

✓ Pros

Completely free to use with no tiers
Excellent conversational and listening skills
Warm, empathetic interaction style
Voice conversation feature is natural
Good for brainstorming and reflection
Clean, distraction-free interface
Available on mobile and web
Privacy-focused design

✗ Cons

Limited technical and analytical capabilities
No API for developers
Small ecosystem with no integrations
Less capable at coding or complex tasks
No image generation or multimodal features
Not suitable for enterprise use
Limited language support (primarily English)
Smaller user community

🎯 Use Cases

• brainstorming

• writing

• personal

✔ Best For

General Q&AWritingCodingResearchBrainstormingAnalysis

🧠 Models

Inflection 3 Pi

🔗 Integrations

API (REST)Messaging AppsSlack

🔀 Alternatives

ChatGPT Claude Kimi

📅 History

May 2023 Pi Launch - Inflection AI launches Pi as empathetic personal AI

2024 Inflection 3 & Microsoft Deal - Inflection 3 Pi model; Mustafa Suleyman moves to Microsoft; enterprise licensing deal

2025 Voice & Platform Expansion - 8 voice profiles; expanded to 13+ platforms including WhatsApp and SMS

2026 Discover Feed & Task Management - Curated Discover feed; reminders and to-do list features added

🇨🇳 China Insight

Pi is not officially available in China. Users would need VPN access to use the service.

🔒 Data & Compliance

Data PolicyConversations are private. Data used for service improvement per ToS.

ComplianceSOC 2, GDPR

Content ModerationAI safety filters; content guidelines

Data RetentionAccount-based retention

💬 Reviews

ℹ️ How this page is built

This page is compiled by an automated pipeline from publicly available vendor information. It is not a hands-on review, and no editor reviews it before publication.

Ratings are editorial estimates derived from public vendor data (features, pricing, ecosystem coverage). They are not user-review averages, and we do not publish user ratings.

Data Snapshot shows when this entry was last refreshed from our directory dataset. Pricing and model line-ups change frequently, so confirm critical pricing on the vendor’s own site.

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Pi