The best free apps for small business owners are the ones that replace expensive software subscriptions without cutting corners on the features you actually use. Notion handles your docs and project management for free. Wave covers invoicing and accounting at zero cost. Google Workspace Essentials keeps your team connected. These three alone replace what most small businesses pay £200 to £500 per month for.
Here is the full breakdown — every category, every top free pick, with honest notes on where the free tier ends and what you will need to pay for eventually.
Quick picks
| Category | Best free app | Free plan limit | Paid from |
|---|---|---|---|
| Project management | Notion | Unlimited pages, up to 10 guests | $10/user/mo |
| Invoicing | Wave | Unlimited invoices and clients | Free forever (payments extra) |
| Communication | Slack | 90 days message history | $7.25/user/mo |
| Scheduling | Cal.com | Unlimited bookings | Free forever (self-hosted) |
| Email marketing | Kit (ConvertKit) | Up to 10,000 subscribers | $39/mo |
| Design | Canva | Thousands of templates | $15/mo |
| Accounting | Wave | Full bookkeeping suite | Free forever |
| CRM | HubSpot CRM | Unlimited contacts | $20/user/mo |
| Video calls | Google Meet | 60-minute meetings | Free with Google account |
| File storage | Google Drive | 15GB | $2.79/mo |
The best free apps for small business owners, by category
1. Notion — best free project management app
Notion is the most versatile free app on this list. It replaces your project management tool, your internal wiki, your meeting notes system, and your team docs — all in one workspace. The free plan gives you unlimited pages, unlimited blocks, and up to 10 guests. For a solo operator or a team of two or three, the free plan covers everything you need for years.
The database feature is what makes Notion genuinely powerful. You can build a client tracker, a content calendar, a task board, and a product roadmap all within the same account, and they can reference each other. Most project management tools charge $10 to $15 per user per month for this level of flexibility.
Best for: Solopreneurs, small teams, anyone who wants one tool for docs and project management.
Not great for: Large teams with complex resource management needs. The free plan caps guests at 10.
Pricing: Free plan (unlimited pages, 10 guests), Plus at $10/user/month, Business at $15/user/month. See Notion pricing
2. Wave — best free invoicing and accounting app
Wave is the most complete free accounting software available. Unlimited invoices, unlimited clients, full double-entry bookkeeping, bank reconciliation, and financial reporting — all free, forever. It is not a stripped-down trial. Wave’s business model is to charge for payment processing and payroll while keeping the core accounting suite free.
For a small business that sends invoices and needs to track income and expenses, Wave replaces QuickBooks or Xero entirely. The interface is clean, the learning curve is low, and there is no subscription to worry about.
Best for: Freelancers, sole traders, and small businesses that need proper bookkeeping without paying £30 to £50 per month for QuickBooks.
Not great for: Businesses that need inventory management, multi-currency accounting, or advanced reporting. Wave’s free tier has limits here.
Pricing: Accounting and invoicing free forever. Payment processing at 2.9% + 30p per transaction. Payroll from $20/month. See Wave pricing
3. HubSpot CRM — best free CRM for small businesses
HubSpot’s free CRM is genuinely one of the best free tools in the entire small business software market. Unlimited contacts, unlimited users, deal pipelines, email tracking, meeting scheduling, live chat, and a basic form builder — all free. There is no time limit, no seat limit, and no artificial cap on contacts.
Where HubSpot makes its money is in the Marketing Hub, Sales Hub, and Service Hub add-ons. The free CRM is designed to pull you into the paid ecosystem over time. But if you just need a CRM, the free tier holds up well for most small businesses for several years.
Best for: Small businesses that want a proper CRM with contact management, deal tracking, and email integration without paying for Salesforce or Pipedrive.
Not great for: Businesses that need advanced automation, sequences, or reporting. Those features are locked behind paid Hubs that start at $20/user/month.
Pricing: CRM free forever. Marketing Hub Starter from $20/month. Sales Hub Starter from $20/user/month. See HubSpot pricing
4. Cal.com — best free scheduling app
Cal.com is the open-source alternative to Calendly. The hosted version is free for unlimited event types and unlimited bookings. You connect your calendar, set your availability, share your link, and people book time with you. It does everything Calendly does on its free tier, without Calendly’s aggressive limitations (Calendly’s free plan allows only one event type).
The self-hosted version is completely free with no limits at all. If you are comfortable with basic server setup, you can run Cal.com on your own infrastructure indefinitely.
Best for: Anyone who currently pays for Calendly and does not need the enterprise features. Solo operators who want unlimited scheduling types at zero cost.
Not great for: Teams that need round-robin scheduling, collective events, or advanced routing. Those features require Cal.com’s Teams plan.
Pricing: Free (unlimited bookings, unlimited event types on hosted version), Teams at $15/user/month. See Cal.com pricing
5. Kit (ConvertKit) — best free email marketing app
Kit has the most generous free email marketing plan available in 2026. Up to 10,000 subscribers, unlimited email sends, landing pages, forms, and one basic automation sequence — all free. For a small business building an email list from scratch, you can run a real email operation at zero cost until your list is well established and earning revenue.
The platform is built specifically for creators and small business operators rather than enterprise marketing teams. The interface is clean, the deliverability is strong, and the landing page builder is good enough to use without additional design tools.
Best for: Small businesses and solopreneurs building an email list from zero. Anyone who wants a proper email marketing tool without paying until the list earns enough to justify it.
Not great for: Ecommerce businesses that need deep Shopify integration and abandoned cart flows. Klaviyo is better there.
Pricing: Free up to 10,000 subscribers, Creator at $39/month for up to 1,000 subscribers (billed monthly), Pro at $79/month. See Kit pricing
6. Slack — best free team communication app
Slack’s free plan gives you 90 days of message history, unlimited channels, and up to 10 app integrations. For a small team of two to five people, the 90-day limit is the main constraint — older messages disappear. But for day-to-day communication, task coordination, and keeping work out of your personal email inbox, Slack free is hard to beat.
The alternative worth mentioning: Discord is completely free with no message history limits. It was built for gaming communities but has been adopted by many small business teams, especially remote-first operations. The interface is less polished than Slack for business use, but the price is unbeatable.
Best for: Small teams that want proper channel-based communication without paying $7+ per user per month from day one.
Not great for: Teams that need to search message history beyond 90 days, or that rely heavily on workflow automations.
Pricing: Free (90-day history, 10 integrations), Pro at $7.25/user/month, Business+ at $12.50/user/month. See Slack pricing
7. Canva — best free design app
Canva’s free plan gives you access to thousands of templates, a drag-and-drop editor, and enough design capability to produce professional-looking social media graphics, presentations, proposals, and marketing materials without hiring a designer. The free library of elements, fonts, and photos is substantial.
The Pro plan at $15/month unlocks the full asset library, background remover, brand kit, and Magic Studio AI tools. For most small businesses, the free plan covers 80% of day-to-day design needs.
Best for: Small business owners who need to produce consistent, professional-looking visual content without design software experience.
Not great for: Businesses with strict brand guidelines that need pixel-perfect design control. Figma or Adobe Express are better for that use case.
Pricing: Free, Pro at $15/month, Teams at $10/user/month (minimum 3 users). See Canva pricing
8. Google Drive and Google Meet — best free file storage and video calls
These two deserve a mention together because they come with every free Google account. Google Drive gives you 15GB of file storage, Google Docs for documents, Google Sheets for spreadsheets, and Google Slides for presentations. Google Meet gives you unlimited 60-minute video calls with up to 100 participants.
For a small business that does not need Microsoft 365, this combination replaces Dropbox, Zoom, and Microsoft Office simultaneously.
Best for: Small businesses that want cloud storage, document collaboration, and video calls without paying for multiple separate subscriptions.
Not great for: Businesses already embedded in the Microsoft ecosystem. Switching has friction and some compatibility headaches.
Pricing: Free with a Google account (15GB), Google One from $2.79/month for 100GB. See Google One pricing
How to build a free small business tech stack
The honest reality is that most small businesses overpay for software in their first two years. You can run a serious business operation on close to zero software cost:
The zero-cost stack:
- Project management: Notion free
- Invoicing and accounting: Wave free
- CRM: HubSpot free
- Scheduling: Cal.com free
- Email marketing: Kit free (up to 10,000 subscribers)
- Communication: Slack free
- Design: Canva free
- File storage and docs: Google Drive free
- Video calls: Google Meet free
Combined monthly cost: £0.
The trade-offs are real — you will hit limits on some of these tools as you grow — but the limits are generous enough that most small businesses can operate on this stack for 12 to 24 months before needing to upgrade anything.
When to start paying
The trigger to upgrade any free tool is when the limitation is actively costing you time or money. Some signals:
Upgrade Notion when your team grows beyond 10 people or you need advanced permissions.
Upgrade Wave when you need multi-currency support or payroll.
Upgrade Kit when your list exceeds 10,000 subscribers and email becomes a meaningful revenue channel.
Upgrade Slack when searching old message history becomes a daily need.
Upgrade Canva when you need the brand kit feature to enforce consistency across a team.
Do not upgrade before you hit those triggers. The free tiers are genuinely good.
FAQ
What is the best completely free invoicing app for small businesses? Wave is the best free invoicing app. It offers unlimited invoices, unlimited clients, and a full accounting suite at no cost. The only charges are for payment processing (2.9% + 30p per transaction) and payroll. The core invoicing and accounting features are free forever.
Is there a free CRM for small businesses with no contact limit? Yes. HubSpot CRM is free with unlimited contacts and unlimited users. It includes deal pipelines, email tracking, meeting scheduling, and basic forms. There is no time limit on the free plan.
Can I run email marketing for free? Yes. Kit (formerly ConvertKit) offers a free plan with up to 10,000 subscribers and unlimited email sends. Mailchimp and MailerLite also offer free plans but with lower subscriber limits and fewer features.
What is the best free alternative to Calendly? Cal.com is the best free Calendly alternative. The hosted version is free with unlimited event types and unlimited bookings. Calendly’s free plan is limited to one event type, making Cal.com the stronger choice for most small businesses.
Is Canva really free for small businesses? Yes. Canva’s free plan includes thousands of templates, a full drag-and-drop editor, and a solid library of free elements and photos. The paid Pro plan at $15/month adds more assets and AI tools, but the free plan is sufficient for most small business design needs.
What free apps do most small businesses actually use? The most commonly used free small business apps are Google Workspace (Drive, Docs, Meet), Canva, Slack, HubSpot CRM, and Notion. Wave is widely used among freelancers and sole traders for free invoicing and accounting.
When should a small business start paying for software? When a free plan’s limitation is actively costing you time or money. Most small businesses can operate on free tiers for 12 to 24 months before any upgrade becomes genuinely necessary. Do not pay for features you do not yet use.