If you freelance or run a one-person business, the standard advice is "just use FreshBooks or QuickBooks." That's fine if you want a full accounting suite with a matching monthly bill. But most freelancers don't need double-entry bookkeeping — they need to send a clean invoice, get paid, keep their receipts in order, and notice before a forgotten SaaS subscription renews for the third year in a row. The tools below are built for exactly that narrower job, and every one of them is a real, live product — not a hypothetical.
For sending invoices
These six cover very different situations: an all-in-one for hispanophone freelancers, a self-hosted option for the privacy-minded, an AI-chat invoice generator, a free one-off tool, a Stripe-native recurring portal, and a voice-first tool for tradies who invoice from a van, not a desk.
Frihet — best if you also need bookkeeping, not just invoices
Frihet bundles invoicing, expense OCR, double-entry bookkeeping and a light CRM into one subscription, with multi-currency support across 96 countries. Its standout feature is native Spanish tax compliance (VeriFactu, TicketBAI) — a big deal if you bill clients in Spain, irrelevant everywhere else. Free up to 999 invoices/month; Pro is €9/mo, Premium (AI copilot, advanced accounting) is €29/mo.
Forces: invoicing + expenses + accounting + CRM in one place, genuinely generous free tier, open-source MCP server if you want an AI assistant plugged into your books.
Limites: the Spain-specific tax edge is dead weight outside that market, and the AI message quota (100/month) is capped even on the priciest plan.
InvoiceShelf — best if you want zero recurring cost and full data ownership
InvoiceShelf is a free, open-source (AGPL-3.0), self-hosted invoicing app — think of it as the FreshBooks you run yourself, on your own server, with Stripe payments built in and support for multiple companies under separate branding. No subscription, ever.
Forces: completely free, no per-seat fees, your financial data never leaves your infrastructure, active project (~1,800 GitHub stars).
Limites: self-hosted only — no managed SaaS version, so you're on the hook for Docker, backups and updates yourself. Not for anyone who doesn't want to touch a terminal.
InvoiceCave — best for creating invoices by chatting instead of clicking
InvoiceCave lets you generate invoices through a natural-language AI chat interface (with direct Claude/MCP integration) instead of filling out a form. The free tier is real — 3 clients, 5 invoices/month, 5 AI chats/day — and Pro is an aggressive $4/month for 200 clients and 300 invoices/month.
Forces: genuinely usable free plan, very cheap paid tier, MCP integration for AI-agent workflows.
Limites: free tier is tight (5 invoices/month), and accounting depth doesn't come close to FreshBooks or QuickBooks — it's an invoice generator, not a books system.
Paid — best for a one-off invoice with zero signup
Paid is a free web tool that spits out a professional invoice, estimate or receipt PDF in about a minute — no account, no watermark, 25+ profession-specific templates. There's a separate paid iPhone app if you want payment tracking beyond the one-off generator.
Forces: truly free with no signup, no watermark, data stays on-device rather than a server.
Limites: the iPhone app's price isn't disclosed until you're in the App Store, and it's not open source — fine for occasional invoices, not a system of record.
BillHog — best if you already bill through Stripe and want auto-delivery
BillHog reads your Stripe payments (read-only, no-code connection) and automatically generates and delivers compliant invoices through a self-serve client portal — plus lets you edit invoices after the fact for VAT/tax-ID corrections. Free up to 50 invoices/month with BillHog branding; Pro is a flat $12/month for unlimited, white-labeled invoices.
Forces: flat $12/month pays for itself past ~$3,000/month billed versus Stripe's own fees, invoices are editable after generation, zero manual work once connected.
Limites: Stripe-only — no use if you get paid another way — and it's an invoicing layer, not a full billing/accounting solution.
SMASH Invoices — best for tradies invoicing on-site
SMASH Invoices is voice-to-invoice: describe a job out loud on-site and get a professional quote or invoice ready to send in under a minute, with Xero/QuickBooks sync. It's built for plumbers, electricians and other on-site trades, and is only available in Australia, New Zealand, the UK, the US and Canada. Free for 5 documents/month with no card required; Starter is $14.99/month unlimited, Pro $24.99/month.
Forces: genuinely fast voice-first workflow, free tier needs no card, noticeably cheaper than all-in-one field-service platforms like Jobber.
Limites: no scheduling or crew dispatch — it only handles quoting/invoicing — and it's geographically limited to 5 countries.
For organizing receipts and expenses
Sending invoices is half the job — the other half is proving what you spent, especially at tax time.
Terrapin — best for automatic, tax-ready receipt capture
Terrapin automatically discovers and organizes receipts by scanning your email and camera roll, with QuickBooks Online and Plaid bank-feed integrations, and is SOC 2 Type II / GDPR compliant. Standard is $9.75/month (billed annually), Extended $13.50/month for a longer 2-year discovery window; both need a card for the 7-day trial.
Forces: hands-off automatic capture from email and photos, direct QuickBooks/Plaid sync, available on iOS and Android.
Limites: no real free tier (just a 7-day trial), and pricing is steep for a freelancer with a light expense load.
Invograb — best for the cheapest OCR expense inbox
Forward invoices by email, snap a photo, or upload a PDF, and Invograb's OCR reads and organizes them — including a Chrome extension that grabs invoices directly from Stripe, Amazon, AWS and Azure. Free for 20 documents/month; Business is €9/month (50+ docs), Professional €15/month (1,000+ docs, advanced OCR).
Forces: usable free tier for low volume, multiple capture methods (email/photo/PDF/browser extension), cheap paid tiers.
Limites: functionally close to direct competitors like GetMyInvoices, and it's an organizer, not a full accounting tool — current pricing is flagged as a promotional rate, so check it hasn't changed before committing long-term.
For tracking what you're already paying
CostLoop — best for catching SaaS renewals before they hit your card
CostLoop scans your inbox for subscription receipts (no bank or card connection required) and builds a single dashboard of every SaaS tool you're paying for, with renewal alerts 14 and 3 days out and a per-tool health score. Free up to 5 subscriptions; Pro is $9/month unlimited, Business $39/month with API/webhooks.
Forces: no bank connection needed (just email metadata), flat pricing regardless of subscription count, real renewal warnings instead of a static list.
Limites: only catches subscriptions that actually email a billing receipt, and API access is locked to the most expensive tier.
Side-by-side
| Tool | Best for | Starting price |
|---|---|---|
| Frihet | Invoicing + full bookkeeping | Free (up to 999 invoices/mo) |
| InvoiceShelf | Self-hosted, zero cost forever | Free (open source) |
| InvoiceCave | Chat-based invoice creation | Free / $4/mo |
| Paid | One-off invoice, no signup | Free |
| BillHog | Auto-invoicing on Stripe | Free / $12/mo flat |
| SMASH Invoices | Voice invoicing for tradies | Free / $14.99/mo |
| Terrapin | Automatic receipt capture | $9.75/mo |
| Invograb | Cheap OCR expense inbox | Free (20 docs/mo) |
| CostLoop | Subscription renewal tracking | Free (5 subs) / $9/mo |
None of these will replace a real accountant once your business gets complicated. But for the actual day-to-day — send an invoice, get paid, don't lose a receipt, don't get blindsided by a renewal — you can cover all three for under $15/month, and in a few cases for free. Start with whichever gap actually costs you time today rather than installing all nine at once.