Built for high performers.

Finally on top
of things.

Mainthread unifies every commitment across work, family, and household into one intelligently prioritized system — then deploys AI agents to handle what doesn't need you.

Start free trial See how it works ↓

14-day free trial  ·  No credit card required

Why?
The problem

Your work lives in twelve tabs. Your family runs on WhatsApp. Your household exists somewhere in your inbox. You're one person. Your tools aren't.

The system

Three layers.
Every area
of your life.

01Swimlanes
Life domains

The major contexts of your life. Everything belongs somewhere. No task floats in a void.

WorkFamilyHouseholdPersonal
→
02Threads
Big things in motion

Each with a clear definition of done. Whether it takes a week or a year — it lives in one place.

Q3 launchHome renoKids' school
→
03Tasks
One thing at a time

Each with a deadline, effort estimate, and a daily-recalculated priority score. Done by you — or delegated.

Pay water billCall the schoolReview contractBook dentist
Priority engine

The right task
at the right time.
Always.

Every task is scored daily across six factors. No morning triage. No forgetting what matters. Just a ranked, capacity-aware shortlist — ready the moment you open the app.

01
Time pressure
Deadline versus effort remaining — not just when it's due, but whether you have enough time left to finish it.
02
Consequence of missing
Some missed deadlines are inconvenient. Others are catastrophic. Mainthread knows the difference.
03
Stakeholder impact
Failing your spouse or your team hits differently than failing only yourself.
04
Thread importance
A task inside a high-priority project rises above one in a lower-priority area — even with similar deadlines.
05
Your judgment
Flag something as important and the system listens. Your instinct, factored in alongside everything else.
06
Dependency order
Blockers rise automatically. You can't do the DMV without renewing insurance first.
AI agents

Some tasks
don't need you.

Forward a bill, CC your Concierge on a thread, or send a WhatsApp. It converts what you share into tasks and hands them off to agents that browse the web, fill forms, book appointments, and complete real-world administrative work — all without you lifting a finger until it matters.

Browser automation
Agents navigate real websites, fill real forms, and complete real workflows — no copy-paste required.
Playbooks & Skills
Teach agents how you do things. Your preferences and workflows — remembered permanently.
Human-in-the-loop
Agents pause and ask before taking sensitive actions. You approve; they execute. Full control, zero tedium.
Live delegation flow
Concierge Agent created task
Pay the water billP2
Household › Bills
Delegated to Task Executor Agent
Pay the water billIn progress
Household › Bills
✓ Loaded skill: Pay municipality bill
✓ Browser session started
✓ Logged into municipality portal
✓ Located invoice — filling payment form
→ Requesting your approval...
Pending your review
Pay the water billNeeds approval
Household › Bills

Ready to pay your water bill for October 2026.

Amount$74.56
InvoiceINV-003
Due dateOct 31, 2026
1 agent paused  ·  waiting for your approval
Agent capabilities

Two agents.
One thinks. One acts.

Mainthread runs two purpose-built agents. The Concierge manages context, communication, and decisions. The Task Executor handles real-world work on your behalf.

Concierge Agent
Your context layer.
  • Converts emails, messages, and voice notes into structured tasks
  • Sends you a daily briefing across all life domains
  • Monitors deadlines and flags what needs attention
  • Suggests what to delegate before you think to ask
  • Communicates via WhatsApp, email, or in-app chat
  • Learns your preferences and adapts over time
  • Proactively follows up with people you've delegated tasks to, and flags delays before they become problems
  • Hands tasks off to the executor when action is needed
Task Executor Agent
Your action layer.
  • Browses real websites and navigates complex web workflows
  • Fills and submits forms on your behalf
  • Books appointments, reservations, and services
  • Researches vendors, options, and pricing
  • Makes payments via prepaid virtual card — you set the budget v1
  • Pauses and requests your approval before sensitive actions
  • Returns a structured outcome report for every task
Different security principals

No access grants.
No integrations.
No exposure.

Concierge Agent

Has its own dedicated email address and WhatsApp number. You forward what it needs — it never touches your inbox, calendar, or accounts.

Task Executor Agent

Runs in a fully isolated browser session. For payments, it uses a prepaid virtual card with a budget cap you define — no connection to your financial accounts.

Founding Membership
We're in v0.6. Join now — use everything free until v1.
Pick the tier that matches how you work. All features unlocked, no credit card, free for 6 months. When v1 launches, you choose whether to continue.
200 founding spots available
Claim your spot →
What you're getting free

Choose your level of support.

Focus
Your entire life, organized and prioritized.
$19/mo
$190 billed annually
  • Unlimited swimlanes, threads & tasks
  • AI priority engine — daily recalculation
  • Cockpit — your daily shortlist
  • Planning board & calendar view
  • Delegate tasks to contacts
  • Weekly completed tasks email
Claim founding membership →
Most popular
Delegate
Stop doing tasks an agent can do for you.
$49/mo
$490 billed annually
  • Everything in Focus
  • Task execution agents (browser automation)
  • Playbooks & Skills
  • Up to 50 agent executions/mo
  • Human-in-the-loop approvals
  • Instant priority recalculation
Claim founding membership →
Autopilot
A chief of staff in your pocket.
$149/mo
$1,490 billed annually
  • Everything in Delegate
  • Dedicated Concierge Agent
  • WhatsApp integration
  • Daily briefings & smart suggestions
  • Unlimited agent executions
  • Concierge-written weekly narrative
Claim founding membership →

Founding membership — full access, free for 6 months  ·  No credit card required  ·  After v1, choose the plan that fits

"
A part-time executive assistant costs $30,000 a year.
Autopilot costs $1,800.
FAQ

Questions we get asked.

What counts as an agent task execution?

Each time an agent completes or attempts a delegated task on your behalf. Viewing, approving, or replying doesn't count toward your limit.

Can I change plans?

Yes, any time. Upgrades are immediate; downgrades apply at the next billing cycle. No penalties, no friction.

What happens if I hit the 50-execution limit on Delegate?

You'll be notified and can either upgrade to Autopilot or wait for your next monthly reset. Agents won't act without your knowledge.

Is my data private?

Yes. Each account is fully isolated. Agents operate on your behalf only, with your explicit approval for every sensitive action.

Do you offer refunds?

If you're not satisfied within your first 14 days, we'll refund you — no questions asked.

Does Mainthread work for non-technical people?

Absolutely. Mainthread is built for anyone juggling multiple life commitments — lawyers, parents, managers, freelancers. No technical background required.

Be part of what v1 becomes.

200 founding spots. Free for 6 months. No credit card required.

Join with Focus Join with Autopilot →