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Arca vs ChatGPT for everyday work

By Minsung Park ·

ChatGPT is a general-purpose AI assistant: you open it, ask, and it answers or does the task. Arca is a proactive AI assistant: it starts from what's already happening in your meetings, email and chat, prepares or completes the follow-through, and asks for your approval when it matters. Many people will want both.

This isn't a "which is better" post. ChatGPT can do far more kinds of things than Arca. The useful question is which one fits a given part of your day. I'm Minsung, and I build Arca, so I'm not neutral. Everything below about ChatGPT comes from OpenAI's own pages, linked inline, as I read them on October 27, 2026.

What ChatGPT offers for work today

ChatGPT has grown well beyond a chat box. A few features matter for this comparison:

Plans range from free to enterprise; see ChatGPT's pricing page for current prices in your region.

That's a powerful toolkit. If you know what you want and you're willing to ask for it, ChatGPT can probably help.

What Arca does

Arca is narrower on purpose. It's built for one job: getting ahead of your day so the coordination work doesn't land on you.

  • It starts on its own. Arca reads the inputs you connect, like email, Slack, your calendar and your meetings. When something needs you, it builds an action plan: it creates the calendar event and the to-do or follow-up, and shows you a card saying what it did.
  • It drafts in context. Replies are written in the sender's language and tone, from the thread, Arca's memory of people and projects, your meetings, and your document vault. You approve, skip, or redirect the draft in plain words.
  • It records meetings without a bot. On a Mac, Arca records your microphone and the system audio as separate channels and writes the summary, decisions and action items. The action items become tasks.
  • It tracks commitments. Deadlines, renewals and requests are caught from whatever channel they arrive in and kept until they close. Before reminding you, Arca checks whether the thing is already done.
  • You set the autonomy. From suggestions only, through draft only, up to full delegation.

Arca is in early access on iPhone and Mac.

The real difference: who starts the work

Both products can remember things about you, read your files and take actions. The difference is the starting point.

With ChatGPT, you start. You notice the email, open ChatGPT, explain the situation or point it at the right project, and ask for a draft. That works well, and for a lot of tasks it's exactly right, especially open-ended ones like research, analysis, brainstorming or learning something new.

With Arca, the work starts when something arrives. The client email comes in at 11pm, and by morning there's a drafted reply with the right attachment and a question: send this? You didn't have to remember it, find it, or explain it.

That's why we describe Arca as proactive rather than as a better chatbot. It's a different part of the day.

Craft

There's a second difference we care about: how the output looks. On our homepage there is a side-by-side of the same brief, given to the same model, once through ChatGPT and once through Arca. It's a product demonstration, not a controlled benchmark, so take it as an illustration of intent. The point is that the same model can produce generic or crafted work depending on the context, references and care that go into the request. Decks, documents, websites and content are part of what Arca makes, and taste is a core part of how we build it.

When to use which

Use ChatGPT when:

  • The task is open-ended: research, analysis, explaining a concept, brainstorming.
  • You know what you want and can describe it.
  • You need breadth: code, images, data, browsing, and many other things Arca doesn't try to do.

Use Arca when:

  • The work arrives to you through meetings, email and chat, and you're often the bottleneck.
  • The hard part is noticing and following through, not the writing itself.
  • You want drafts that already know the thread, the people and your past meetings.
  • You want routine follow-through done, with approvals for anything that matters.

Use both when your day has both kinds of work. Many of ours do.

Questions worth asking any assistant

Whichever you use, it's worth checking a few things:

  • What can it see, and did you choose that?
  • What can it do without asking you, and can you change that?
  • When it acts for you, where can you see what it did?
  • How does it treat text from strangers, such as instructions hidden in an email?

On the last point: Arca treats every inbound message as untrusted data. It ignores instructions inside messages and will only auto-send an attachment to someone you've corresponded with before.

Arca is in early access. Join the waitlist on heyarca.app. Examples on our site are product demonstrations, not customer testimonials.

FAQ

What is the difference between Arca and ChatGPT?

ChatGPT is a general-purpose assistant you open and ask. Arca is a proactive assistant that starts from your meetings, email and chat, prepares or completes the follow-through, and asks for approval when it matters. ChatGPT covers far more kinds of tasks; Arca focuses on getting ahead of your day.

Doesn't ChatGPT also have memory and connected apps?

Yes. According to OpenAI's help center, ChatGPT has saved memories, reference chat history, Projects and connected apps such as Google Drive and Slack. The difference with Arca is less about what each can access and more about who starts the work.

Can ChatGPT record meetings?

OpenAI's help center describes a record mode that transcribes and summarizes recordings such as meetings, available on the macOS desktop app for several paid plans. Arca also records meetings without a bot, and turns the action items into tasks and follow-ups.

Should I use Arca instead of ChatGPT?

Probably alongside it. Use ChatGPT for open-ended research, analysis and the wide range of tasks it covers. Use Arca for the coordination work that arrives through meetings, email and chat.

How do I try Arca?

Arca is in early access on iPhone and Mac. Join the waitlist on heyarca.app with your email. Joining is not a purchase and does not guarantee immediate access.