A useful stack can start at $0 per month.
For most one-person businesses, the minimum dependable stack is a lead-capture tool, a simple customer pipeline, a password manager, and the automation already included in those products.
That is enough to collect an inquiry, remember who needs a follow-up, protect the accounts that run the business, and avoid repeating the most obvious administrative work. Your domain, payment-processing fees, industry-specific software, and taxes sit outside this estimate.
Do not pay for a feature because it might be useful later. Pay when a current limit can be named in dollars, hours, missed follow-ups, or security exposure.
Four jobs. Three core tools.
MailerLite: the simple service-business default
MailerLite's current free plan is intentionally small—up to 250 active subscribers and 2,500 emails per month—but it includes the tools a new service business actually needs: forms, landing pages, campaigns, and automation. That smaller limit is acceptable when the list is made of real prospects instead of a broad creator audience.
Official MailerLite pricingHubSpot CRM: a clean place to remember the next action
The free CRM supports up to two users and includes contact, deal, and task management, meeting scheduling, live chat, and email tracking. The goal is not to configure every field. Create one pipeline, require a next action on every open deal, and review it twice a week.
Official HubSpot CRM pageProton Pass: secure the stack before it grows
The individual free plan includes unlimited entries and devices, a password generator, limited built-in 2FA storage, and email aliases. Use a unique generated password for every business account and enable the strongest multifactor option each service supports.
Official Proton Pass pricing$0 software does not mean a $0 business.
The stack above can run at no monthly software cost, but a credible operation still normally needs a domain and a brand email address. Payment processors take transaction fees, and regulated or field-service work may require industry software, secure storage, or record retention that a generic stack cannot replace.
- Domain: usually a small annual cost; use WHOIS privacy when the registrar includes it.
- Business email: add it when the domain is connected; avoid publishing a personal address.
- Payments: compare the full transaction cost, not just the monthly subscription.
- Backups: keep a separate, tested copy of records you cannot recreate.
Buy the next plan only after one of these happens.
Your list passes the limit
Move to a paid MailerLite tier or evaluate Kit, whose Newsletter Plan currently supports up to 10,000 subscribers free.
Follow-up becomes inconsistent
Pay for CRM automation when missed tasks or manual sequences are costing actual sales—not because the demo looked impressive.
Two tools do the same work
Consolidate into Systeme.io when funnels, email, and digital products are the business. Its free tier currently supports up to 2,000 contacts.
You manage client accounts
Consider HighLevel only when agency workflows, sub-accounts, and rebilling can justify its $97-or-higher monthly entry price.
Do not force a generic stack onto specialized work.
Skip this exact setup if your daily work depends on dispatching technicians, route optimization, medical or legal record controls, inventory, or formal compliance workflows. Those requirements can justify specialized software from day one.
Also skip the urge to connect everything with an automation platform immediately. Each connection creates another failure point. First make the manual workflow consistent; automate the stable parts after you understand what should happen when a record is incomplete or a service is down.
Start small enough that you understand every tool. A lean stack is not about spending nothing forever—it is about knowing exactly what each paid subscription is earning back.
What we checked
Prices and program details change. These official pages were checked on August 16, 2026; verify the checkout price before buying.