AI Co-Founder for Solopreneurs

From idea to evidence.

Linus is a proactive AI co-founder that guides first-time solopreneurs from raw idea to validated business — surfacing the right action at the right moment, before you have to ask.

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Free tier — no credit card required · Stress-test your first idea in minutes

What Linus does

PROACTIVE GUIDANCE

It knows what to do next.

Linus monitors your stage, connected tools, and open milestones — then surfaces the right action before you have to ask. No more staring at a blank roadmap.

HONEST SIGNAL

Evidence over assumption.

Instead of validating your priors, Linus stress-tests them. It helps you design lean experiments, line up target users, and read the results without rose-tinted filters.

BUILT FOR ONE

Designed for working alone.

Every interaction is calibrated for a solo founder: no enterprise jargon, no team workflows, no noise. Just a co-founder who keeps the same hours you do.

The journey

Clarity at every turn forward.

Submit your idea.

Tell Linus your concept in plain language. It asks the questions a good co-founder would — market size, who has this problem, why now.

Get your stress-test.

Linus maps your strongest assumptions, flags the riskiest ones, and gives you a prioritised validation plan with concrete next steps.

Run the experiments.

From finding your first five users to summarising interview themes, Linus handles the operational heavy lifting so you can stay in insight mode.

Move to the next stage.

Once there is enough evidence, Linus shifts with you — from validation into positioning, marketing, and go-to-market execution.

Early founders

"I spent two months building before talking to a single user. Linus would have stopped me in week one."

Jamie K.

Bootstrapped SaaS founder

"It's the co-founder I didn't have — someone who's been through the journey and knows exactly where I'm wasting time."

Priya S.

First-time solopreneur

"The daily digest is genuinely useful. It surfaces the one thing I should be doing, not a task avalanche."

Marcus T.

Indie maker

Pricing

Start free. Grow when you're ready.

Free

$0forever

Stress-test one idea and validate the fundamentals.

Idea stress-test
Assumption map
Validation plan
3 user interview templates

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Founder

$29/ month

The full agent lifecycle — from idea to go-to-market.

Everything in Free
Automated interview outreach
Daily prioritised digest
Marketing agent
Ambient tool monitoring
Unlimited ideas

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Get started today

Your idea deserves an honest first look.

Stress-test your concept in minutes. Free, no credit card, no fluff.

Start free — no card needed