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The 90-Day Sprint (Cyclic Side Hustle)

By Perry Maughmer + Greg Isenberg

Split your year into 4 sprints of 90 days each. Each sprint has one theme, one primary goal, and one key result. At the end of 90 days, you either double down or pivot. No ambiguous 'work on it when you can' — every 90 days has a pass/fail criteria.

Best for: Founders who get stuck in perpetual 'working on it' mode without shipping

Weekly commitment: 8–12 hours (weekends + 2 weeknights)

Steps

2 hours (Day 1)

Define the 90-day theme

Pick ONE outcome for the next 90 days. Examples: 'Validate 3 SaaS ideas via waitlist landing pages' or 'Ship MVP and get 10 paying customers' or 'Hit $2K MRR.'

30 min (Day 1)

Set the pass/fail criteria

What exactly proves success? '10 paying customers at $49/month' or '100 waitlist signups on a pre-launch page.' Be specific — vague goals produce vague results.

30 min (Day 1)

Break into 30-day chunks

Month 1: Build landing page + validate. Month 2: Build MVP. Month 3: Launch and get customers. Each chunk has its own mini-goal.

60 min (weekly)

Weekly 60-min sprint review

Every Sunday: review weekly progress, check against 90-day goal, adjust tactics. Is the 90-day goal still realistic? Do you need to change approach?

3 hours (Day 90)

The 90-day audit

On day 90, review the result against the pass/fail criteria. Did you hit it? Yes → plan the next 90-day sprint (double down). No → pivot or kill the idea entirely.

Tools Needed

Notion or Linear (sprint tracker)Calendar (weekly review slot)Spreadsheet (simple revenue/validation tracker)

Expected Results

4 clear shots at building something meaningful per year. Each sprint produces either a validated business or a clean 'no' — no zombie projects that drag on for years. Greg Isenberg uses this to run 4+ product experiments per year.

Common Mistakes

Changing the goal mid-sprint. If you change the theme on day 45, you wasted 45 days. Write the goal down, put it somewhere visible, and don't touch it until day 90. Also: not making the pass/fail criteria truly binary.

Frequently Asked Questions

What if I need more than 90 days to validate?

You don't. If you can't get traction or meaningful feedback in 90 days with 8+ hours/week, either the market isn't ready, the problem isn't painful enough, or you're solving the wrong problem. 90 days is generous for a micro-SaaS.

What happens if I fail the sprint?

Kill the idea. Not pause — kill. Take 1 week off, then start the next 90-day sprint with a fresh idea. The constraint is what makes it work. If you 'pause' a failed sprint, you'll never actually start the next one. You'll just sit in the ambiguity.

Calculate Your Freedom Number

What Invisible Exit Is

Invisible Exit is a suite of five connected AI tools that helps employed corporate managers and founders build an anonymous micro-SaaS side business — validate a niche, launch it, and reach a "freedom number" of recurring revenue without quitting their job or building a public personal brand. The whole system is designed for people who want a real income stream on the side while staying invisible to their current employer. Plans start at $0.97/month.

The Five Tools

Freedom Number Dashboard
Calculates the monthly side income that would cover your living expenses, so you know the exact target that makes leaving your job optional rather than desperate.
Idea Validation
A library of 500+ micro-SaaS ideas scored by industry fit, time investment, and revenue potential, plus AI-powered validation of your own idea in about 48 hours — so you build something people will pay for.
Compliance & Anonymity
Entity-separation and digital-invisibility guides plus a compliance audit against the clauses that trip up employed founders — non-compete, IP-assignment, and moonlighting terms — so you keep devices, accounts, and domains cleanly separate from your employer.
Launch Automation
Go-live tooling built for a five-hour weekend: Stripe integration, landing-page generation, and a launch-sequence builder that take you from idea to a live paid product.
Faceless Audience Builder
YouTube scripts, Reddit playbooks, and SEO content templates that build demand without ever showing your face or attaching your real name.

What Invisible Exit Is Not

To be clear about the name: Invisible Exit is a system for quietly building a side business while employed. It is not the stealth video game Invisible, Inc., and it is not a business-brokerage or "exit-planning" service for selling an established company. The "exit" here is your personal path out of a 9-to-5, built invisibly.

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Frequently Asked Questions

What is Invisible Exit?

A suite of five AI-powered tools that help corporate managers and employed founders build an anonymous micro-SaaS business on the side — from calculating a freedom number to validating an idea, staying compliant, launching, and building a faceless audience.

Can I build a side business while employed without my employer finding out?

Yes. Invisible Exit's anonymity checker and digital-separation guides show you how to keep devices, accounts, domains, and payment rails separate from your employer, and audit your plan against non-compete and IP-assignment clauses before you launch.

What is a freedom number and how do I calculate it?

Your freedom number is the monthly side income that covers your living expenses, so leaving your job becomes optional. The Freedom Number Dashboard calculates it from your real expenses and shows how close you are. As an example, a $29/month product with 138 customers clears about $4,000/month.

How much does Invisible Exit cost?

Invisible Exit starts at $0.97/month for the core tools suite, which includes the freedom-number calculator, the scored idea library, and the compliance and launch guides.

Do I need a personal brand to build a side business?

No. Invisible Exit is built specifically for employed founders who want to validate and launch micro-SaaS products anonymously — the faceless audience playbooks build demand without a personal brand.

Explore the tools →

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Customers building
$4K
Target /month
5
AI tools included
$0.97
Founding /mo

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The Founding Stack

$348/month of tools. Founding members pay $0.97.

Every tool you need to build invisible recurring revenue — in one membership.

① Freedom Number Calculator
Exact monthly revenue target in 90 seconds.
VALUE: $79
② Idea Validator
500+ scored micro-SaaS blueprints. Find one that fits.
VALUE: $99
③ Stealth Ops & Compliance
Separate entity + anonymity playbooks.
VALUE: $69
④ Launch Automation
Landing page, Stripe, email — wired.
VALUE: $59
⑤ Faceless Brand Builder
Grow demand without a personal brand.
VALUE: $42
Total value
$348/mo
Founding member price
$0.97/mo

🛡️ If you do not earn $4K/mo within 12 months, we refund every cent. Founding price locked.

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