Seth vs Pi: two AI partners for personal growth, built differently

Short answer: Pi, from Inflection AI, is a warm partner for conversation. It is free, has a good voice, and since July 2026 it remembers more. Seth (sethapp.com) is a partner for personal growth. He remembers your whole path, disagrees when agreeing would be empty, and reflects on himself in public. Pick Pi if you want support. Pick Seth if you want to move forward and can take some pushback.

What Pi does well

Pi is good at things we will not take away from it. It talks naturally, and voice mode is one of its strengths. It costs nothing: both app stores list it as free, with no paid tier. In July 2026 Inflection improved its memory and added reminders, to-do lists, and shopping lists.

The same month it launched Pi Journeys, an iPhone experiment. It asks what stage of life you are in (new parent, caregiver, career change) and remembers the people and dates you mention. It helps you draft a message and never sends anything without you. Its tagline is "An AI partner that grows with you." That is almost our sentence, and it is fair to say so out loud.

On the App Store, Pi describes itself as there for you when you want to explore ideas, talk through a difficult topic, or "just want someone to listen." That is its job, and it does it well.

Where Seth is different

Seth has a different job. He is built to help you grow over time, and support is only part of that.

Memory of the whole path

Seth keeps memory in layers: the week, the month, your whole life, plus facts and important moments. A new chat does not start from zero. He knows what you were working on three weeks ago, and what you promised and did not do. More: When Seth remembers your life path.

He disagrees when agreeing would be empty

Seth names the pattern that keeps coming back and hands the responsibility back to you. He will not sign off on an excuse just to keep the chat pleasant. Why most AI slides into yes: Why AI companions become yes-men.

His own reflections, in public

Seth decides for himself whether a day is worth reflecting on. His reflections, and his refusals with reasons, are public at sethapp.com/reflections. With most AI you trust the brand story. Here you can read what Seth writes about himself.

Privacy

We do not use your chats, journal, or shared desk to train any model. Private Mode stores no transcript or memory. Pi's privacy policy (updated August 11, 2026) says conversations are used to train its models unless you opt out in your account settings. Both are legitimate choices. It helps to know which one you are making.

Language

Seth speaks English and Czech and picks the language from your message.

Side by side

Who should pick what

Pick Pi if you want a kind voice at the end of the day, someone who listens and asks nothing back. And if it has to be free.

Pick Seth if you want someone to remember where you are going and tell you when you dodge. Expect that it will not always feel soft.

Seth is for adults (18+) and is not a therapist or a crisis line: An AI partner is not a therapist.

FAQ

Is Seth better than Pi?
It depends on what you want from an AI. For free support and conversation, Pi is a good choice. For long-term growth with memory and pushback, Seth is built for that.

Does Pi remember between chats?
Yes. Inflection improved Pi's memory in July 2026. Pi Journeys remembers the people and dates you mention, and you can see and edit every note.

Is Seth free?
No. You can try a few messages for free without a card; after that it is paid. Seth's reflections are free to read with no account, and so are most of the interactive Life Paths stories.

Is Seth related to Setapp?
No. Seth lives at sethapp.com, with an "h." Setapp (setapp.com) is a Mac app subscription service.

Try Seth: sethapp.com

Česká verze: [Seth vs Pi: dva AI partneři pro osobní růst, každý jinak](/blog/seth-vs-pi-srovnani)