Use the Claude, ChatGPT or Gemini plan your company already pays for.
Each one with the exact actions an agent can take in it.
All integrations30 minutes with us. Bring one job you never want to do again.
You text Instinct and it books, buys and checks you in. Running a company is different work: one brain the team shares, access for each person, and agents that ask before anything leaves.
Check me in for tomorrow's flight and book a car to the airport.
What it does well
What it does for a company
The short answerInstinct is built to take personal errands off one person's plate, by text. It doesn't try to be a company system: there is no shared knowledge, no roles and no agents per job. If that is what you need, Brainstack is built for it.
What one person needs from an agent, and what a company needs on top. What we say about Instinct comes from its maker and the press, and we mark what isn't public.
| What you need | Instinct | Brainstack |
|---|---|---|
| Who it is built for | InstinctNoOne person and their errands, by text. Invite-only. | BrainstackYesTeams of 3 to 30 people, and bigger on Custom. |
| A shared company brain | InstinctNoRemembers what it learns about you from the accounts you connect. | BrainstackYesA living file per client, each fact with its source, read from the tools you connect. |
| Access for each person | InstinctPartlyIn group chats you choose which groups your Instinct trusts, and the group's Instinct can't reach your personal accounts. | BrainstackYesEach person sees only what their role allows, in the app and from their own Claude or ChatGPT. |
| Agents for each job, on a schedule | InstinctNoOne assistant per person, plus one per group chat. | BrainstackYes27 agents ready to set up across marketing, sales, customers, operations and admin, each with a schedule and a dashboard. |
| Approvals before anything leaves | InstinctNot statedNo public documentation of approval rules. | BrainstackYesSet per agent: sending, publishing, spending, deleting and amounts above your limit. |
| Your company's tools | InstinctPartlyUses your accounts on its own computer: email, calendar, travel, shopping. | BrainstackYes100+ apps: Gmail, Outlook, Drive, Notion, HubSpot, Slack, Teams, Stripe, Xero. |
| Choice of AI | InstinctNot statedNot documented publicly. | BrainstackYesYour company's Claude, ChatGPT or Gemini plan, with no margin from us. |
| Where company data lives | InstinctPartlyInstinct's cloud. TechCrunch reported tester concerns about its terms and data retention (August 2026). | BrainstackYesA server only your company uses, in the US or Europe, with encrypted backups every 6 hours. |
| Personal errands | InstinctYesIts core: travel, bookings, groceries, appointments. | BrainstackNoNot what it's for. Brainstack does your company's work. |
| Price | InstinctNo public price yet. | Brainstack$99, $499 or $999 a month for the company, plus your AI plan. |
A personal agent knows one person. Brainstack keeps one brain for the whole company and answers each person with only what their role allows, from the app or from their own AI.
$1,200 a month from June, agreed on May 14. Margin is 34% this quarter, 3 points down after the May discount.
$1,200 a month from June, agreed on May 14. Margins aren't visible to your role.
Prices aren't visible to your role. On the account: 2 open tickets, both answered yesterday.
Instead of one assistant for one person, each agent owns a job, works to its schedule and brings you the big calls. One tap to approve, from the channel you already use.
Invoice to Northwind for $4,200. Above your $3,000 limit.
Approved and sent
Held. The agent will ask again tomorrow.
Second follow-up to Bluebird Co about the proposal from Tuesday.
Approved and sent
Held. The agent will ask again tomorrow.
Refund of $180 to Halcyon Foods for a double charge.
Approved
Held. The agent will ask again tomorrow.
More than 100 apps. The company brain reads only what you connect, and each agent acts only in the tools you give it.
Gmail, Drive, Notion, your CRM. The brain builds a living file per client from them.
Give each person a role. That decides what they see, in the app and in their own AI.
Pick a role, set its schedule and what needs your approval. It starts on the next run.
Every plan includes the company brain, your own server and approvals. You pay your company's AI plan directly to Anthropic, OpenAI or Google, at their price.
A personal AI agent from Spear Street Technology in San Francisco. You reach it by text, WhatsApp or phone, and it uses your accounts on its own computer to book, buy and handle errands. It has been in invite-only early access since August 2026.
Since October 2026 it can join group chats and plan for a group, which is aimed at friends, roommates and families. It doesn't offer roles, shared company knowledge or agents per job. Brainstack does.
There is no public price yet; early users use it free. Brainstack plans are public: $99, $499 and $999 per month, plus your own AI plan.
No. It is built for a company's work: clients, invoices, inbox, sales and support. Each person can still ask the company brain from their own Claude or ChatGPT, and gets only what their role allows.
Starter is $99 a month, Growth $499 and Scale $999, for the whole company. On top, you pay your company's AI plan (Claude, ChatGPT or Gemini) directly to the provider. We add no margin. Custom is priced with you.
On a server only your company uses, in the US or Europe, with encrypted backups every 6 hours. Your AI provider processes what an agent or a person sends it, under the terms of your plan.
Not yet. What we do have: one server per customer, permissions per person, approvals before anything leaves, a record of what each agent did, and GDPR terms.