Chai vs Pi (2026): which should you pick?
As of Nov 12, 2026, Pi grades higher than Chai: 2.8 against 2.2 out of 4.0.
Checked Oct 5, 2026 and Nov 12, 2026 · graded Oct 10, 2026 and Nov 12, 2026 by ToolGPA
Chai grades higher on ease of use. Pi grades higher on value for money and the free plan. They get the same grade on features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Chai
Mobile app for chatting with AI characters that users create
Free plan
Which one is for you
Pick Chai if
- Fits if you want to chat with characters other users made on your phone
- Works for adults who want to write their own character
Look elsewhere if
- Not for you if you're under 18: age is checked by selfie or ID
- Not for you if you want a work assistant, as it's character chat only
- Watch out: no price is published, and some regions need a paid subscription
- Watch out: the web version is listed as coming soon
Pick Pi if
- Fits if you want to talk a decision or a worry through before you act on it
- Works for people who'd rather speak than type, since there's a live voice mode
Look elsewhere if
- Skip it if you need files read, images made or code written, as its listings mention none of them
- Not for you if you want the app in your own language, because the App Store shows English only
- Not for you if you're choosing for a teenager, since the App Store rates it 18+
- Watch out: there's no desktop app, nothing it connects to and no API, so on a computer it's a browser tab
How we grade them
| 2.2GPAChaiFair | 2.8GPAPiGood | |
|---|---|---|
| Value for money | CNo price is shown on the vendor's site or the Google Play listing, which says only that there are in-app purchases and ads. | AIt costs nothing. Pi is listed as free on the App Store and Google Play, and neither listing shows a paid plan or in-app purchase, where the middle of this category wants about $12 a month. |
| Free plan and trial | CThe app carries ads and in-app purchases, and the Safety Center says some regions need a paid subscription. | AFree outright, text chats and the live voice mode alike, on the web, iPhone, iPad and Android. There's no paid tier, so nothing is being held back for one. |
| Features | CUser-made characters, in-character chat, in-house models and safety filters. A narrow job: character chat, not general work. | CIt does its one job fully — conversation, typed or spoken, for decisions, hard talks, learning a topic or practising a language — and that's a smaller job than this category's. The listings mention no file reading, no image making and no coding, and the App Store shows English as the only language. |
| Ease of use | BNo rating on record, but it's an app you install and start chatting in, with nothing to set up. Age checks apply. | C4.4 from about 2,500 App Store ratings, which is the ordinary middle of this category rather than the top. There's nothing to set up: open it and start typing, or talking. |
| Platforms and integrations | CiOS and Android only, with no web version yet and no integrations. | CWeb, iPhone, iPad and Android, and no more than that. No desktop app is listed, nothing it connects to, and no API. |
| Best for | a mobile app for chatting with AI characters | talking things through, by text or out loud |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Chai and Pi. How we grade
Where they differ
- Pi also covers natural-language input.
In commoniOSAndroidAI featuresChat assistant
At a glance
| Chai | Pi | |
|---|---|---|
| Pricing | Free plan | Free |
| Starts at | Not published | Free |
| Free plan | None | The app is listed as free on the US App Store and on Google Play, and neither listing shows in-app purchases. |
| Free trial | None listed | None listed |
| Web | ||
| iOS | ||
| Android | ||
| Made by | Chai Research Corp. | Inflection AI |
| Price read from | Not confirmed | apps.apple.com |
| Checked | Nov 12, 2026 | Oct 5, 2026 |
Worth knowing
Chai
- Prices could not be confirmed: the vendor's site and its Google Play listing show none, which says only that the app has in-app purchases and ads.
- The company's Safety Center says that in some regions use of the service requires a paid subscription.
- Adults only: users must be 18 or older, and the company says it checks age through selfie estimation or ID verification by a third party.
- Runs as an iOS and Android app; the website lists a web version as coming soon. It is a character-chat product, not a general work assistant.
Pi
- The app listings describe conversation only, with no mention of file analysis, image generation or coding tools.
- The App Store listing shows English as the app's only language.
- The App Store gives the app an 18+ age rating.
- The listings cover iPhone, iPad and Android; no desktop app is listed, so on a computer Pi is used in a browser.
Key features
Chai
- User-made AI characters
- People create their own AI characters and stories and share them with others on the platform.
- Conversations in character
- The Google Play listing says the chatbots reply in character, with a large selection of characters to choose from.
- In-house language models
- The company says it trains its own models for the product rather than relying on open-source ones.
- Safety filters and reporting
- The app has optional filters for mature content and anonymous in-app reporting of characters and messages.
Pi
- Supportive conversation
- Designed for preparing a hard conversation, talking through a difficult topic or a decision, or venting when you want someone to listen.
- Voice mode
- Talk with Pi live by voice instead of typing your side of the conversation.
- Learning and language practice
- Explains a new topic in conversation and can act as a partner for practicing a language.
- Planning and brainstorming
- Helps turn something new into an action plan, generates ideas and suggests things such as what to watch next.
- Adapts over time
- Inflection says Pi evolves and understands you better the more you talk with it.
Plans
Chai
Pricing could not be confirmed. See chai-research.com.
Pi
Free$0
Text and voice conversations with Pi on the web, iPhone, iPad and Android.
Common questions
Which is cheaper, Chai or Pi?
As of Nov 12, 2026, Chai has no price we could confirm, and Pi is free.
Which has a free plan, Chai or Pi?
As of Nov 12, 2026, only Pi has a free plan. Chai does not.
Which platforms do Chai and Pi run on?
As of Nov 12, 2026, only Pi lists a web app. Both list iOS and Android apps. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.