Validate your idea in 2 tasks.

No idea yet? Start there.

jarsen is a mentor for people who want to build something of their own and haven't started. It gives you one clear next step at a time, with a deadline and a follow-up, from a vague idea to a real business.

Start free

Free to start. No card needed.

I have an idea but can't move.
What's the idea, in one sentence?
Invoicing for freelance designers. They all hate it.
Then let's hear it from them. Talk to 3 freelance designers this week and ask how they send invoices today. I'll write the message.
Task 1 of 2Due Thursday
Talk to 3 freelance designers about how they invoice

You've had the idea for months.

You watched the videos and asked the chatbots. You know enough to start, and you still haven't. What's missing is someone who sees where you're stuck and says what to do this week. jarsen asks one question at a time, picks your next step, gives it a deadline and checks in when it's due.

Two tasks to your first real signal.

The free plan answers the first question every idea has to face: does anyone actually want this?

Task 1

Talk to 3 real people who might have the problem.

jarsen helps you pick who to ask and what to ask so you don't lead them, then writes the first message for you.

Done when 3 people have told you how they deal with it today.

Task 2

Get a real commitment.

A sign-up, a pre-order or a payment. Compliments are easy to give. Someone putting their name or money down tells you it's real.

Done when someone commits. That's your first real signal.

Idea didn't hold up? Start the next one. Your 2 free tasks start over for it.

Got your first signal? Keep going.

The full plan picks up where the free one ends: more proof before you build, your business model, your build path with Claude Code or Claude, and every step to launch as a task with a deadline.

Sixteen milestones from stuck to summit.

jarsen places you on the trail by what you've actually done. In the app, the aurora lights up the way you've climbed.

Validated: free up to hereSummit
  1. 4First conversationsYou talked to at least 3 real people who might need it.
  2. 5Problem confirmedReal people described the problem without you leading them.
  3. 6ValidatedSomeone committed: a sign-up, a pre-order or a payment.

Everything around the next step.

Basecamp

Your tasks with real deadlines, synced to your own calendar. A daily check-in, a streak to protect and a reminder email when something is due.

Field Journal

jarsen remembers your idea, your story, what people told you and who committed. It's all on your journey map, and you can edit any of it.

Build with GitHub and Claude Code

Software gets built in Claude Code one small step at a time, with the prompts written for you. Connect your repo and every push moves you up the trail. Documents get made in Claude.

Action mode and Chat mode

Action mode gives you the next step and holds you to it. Chat mode is for thinking out loud, with no tasks and no pressure.

Voice

Tap the mic and talk it through, hands-free. jarsen answers out loud and the mic opens again when it's your turn.

Growth systems

After launch, on the full plan: one channel at a time, daily routines like 10 DMs a day, a pipeline of leads and your numbers reviewed every week.

Start free. Pay when it's real.

Validating costs nothing. Once someone has committed, the full plan takes you to launch.

Free

Validate your idea in 2 tasks.

€0no card needed
  • Your mentor, in Action mode and Chat mode
  • 2 tasks to validate your idea
  • Each with a deadline in your calendar and a reminder email
  • Daily check-ins, streaks and rewards
  • 3 voice minutes to try it out
Start free

Full plan

From your first signal to launch.

€10a month
  • More proof before you build: more conversations, more commitments
  • Your business model, worked out with you
  • Your build path: Claude Code for software, Claude for documents
  • Unlimited tasks with deadlines, in your calendar, with reminders
  • Help finishing any task: break it down, draft it, rehearse it
  • Your GitHub pushes count as progress
  • Guidance all the way to launch
  • 120 voice minutes a month

Cancel anytime. If it isn't for you in the first week, you get your money back.

After launch the full plan keeps going: daily routines, a pipeline of leads and your numbers reviewed every week.

Questions

If not now, then when?

Tell jarsen your idea. You'll have your first task in a few minutes.

Start free