Lean Solo Business: 5 Free Tools and 2 Paid Ones Worth It

Three years running a solo business. The stack is leaner than most consultants would recommend — and works better.

The SaaS-stack-for-solo-business industry sells you complexity. Most solo operations need 7-10 tools and end up with 30. The lean stack below has run my consulting and writing business for three years without bottlenecks.

The five free tools

1. Google Workspace (Gmail + Docs + Sheets + Calendar). Free for personal use. Covers 80% of business needs. Document collaboration, email, scheduling. Don't reinvent this.

2. Notion (free tier). Notes, project tracking, simple databases. The free tier covers solo operations comfortably.

3. Bank's bill-pay system. Most banks have decent bill-pay built in. Skip the separate "accounts payable" tool until you have a team.

4. WhatsApp/Signal for client communication. Yes, for some clients. Asynchronous, persistent, free.

5. Empower (free) for financial dashboards. Net worth, cash flow, basic reporting. Premium services upsell aggressively; the free tier is enough for a solo.

The two paid tools worth the money

1. A reliable invoicing tool ($10-20/month). Wave is free if you don't need recurring billing. Bonsai or Honeybook if you do. Invoicing is one place not to skimp; payments late by a day cost you compounded time.

2. A real password manager ($3-5/month). 1Password or Bitwarden. The security cost of weak passwords for a business is higher than the subscription.

What I don't use

CRMs at solo scale. A Google Sheet does it.

Email marketing platforms with paid tiers, until I have an audience of 1,000+.

Project management tools beyond Notion. Trello, Asana, Monday — all overengineered for solo work.

Accounting software beyond a basic spreadsheet. QuickBooks et al. are worth it when you hire a bookkeeper, not before.

"Automation" platforms (Zapier, Make) — useful when scaling; over-engineered for solo.

The cost math

My total monthly tool spend: ~$25. Industry average for a solo consultant is $150-400/month. The savings compound into either lower fees (competitive advantage) or higher take-home.

The infrastructure

A standing desk. Noise cancelling headphones. A mechanical keyboard. A Stanley tumbler water bottle. Deep Work for protecting the time. Less tooling, more focus.

What changes as you scale

Once you have an assistant or contractor, project management tools start earning their keep. Once you have an audience over 5,000, email marketing platforms matter. Once you have an LLC and real cash flow, accounting software is worth it.

Until then, the lean stack works.

The reading

Paul Jarvis's "Company of One" for the philosophy. Atomic Habits for the daily discipline.

The honest answer

Most solo businesses are over-tooled. The bottleneck is rarely the software; it's the focus and consistency. Spend less on tools, more on doing the work, and the business runs better.