We Checked How 10 Invoice Tools Handle Your Data
We audited 10 invoice apps on account required, server storage, GDPR DPA, and trackers. See which tools keep your data private — and which just claim to.
Short answer: Among the 10 invoice apps we audited, only invoicePrivate and Invoice Ninja (self-hosted) keep your invoice data fully off third-party servers. Every other tool — including FreshBooks, Wave, Zoho, Bonsai, and PayPal Invoicing — stores your invoice data in their cloud databases. "GDPR compliant" is not the same as "private": most GDPR-compliant tools collect your data with legal safeguards, but still collect it. The table below shows exactly what each tool does.
When you fill in a client's name, address, and project fee in an invoice tool, where does that information go? We audited 10 popular invoice generators — reading privacy policies, watching network requests in browser DevTools, and checking for GDPR compliance documentation — to answer that question accurately.
The results reveal a wide spectrum: from tools that transmit your invoice data the moment you type, to the genuinely rare exception that never sends anything to a server at all.
Methodology: How We Audited Each Tool
For each of the 10 tools, we ran the same four-step process:
- Network analysis: Opened browser DevTools (Network tab, XHR/Fetch filter) and created a test invoice with dummy data. Watched which outbound requests fired — especially during PDF generation, the moment most server-side tools transmit your data.
- Privacy policy review: Searched each policy for "invoice data," "store," "sub-processors," and "DPA." A published DPA is a reliable signal that personal data is processed server-side.
- Third-party script audit: Checked page source for analytics tags (Google Analytics, Segment, Mixpanel, Facebook Pixel).
- Open-source check: Searched GitHub for published source code under an open licence.
We are the makers of invoicePrivate, so this comparison is not independent research. We've aimed to represent every tool accurately based on publicly available information, but you should read each tool's own privacy policy and verify our findings for yourself. Findings reflect the state of each tool as of May 2026.
What We Measured
For each tool we assessed five dimensions:
- Requires account — do you need to register before you can create an invoice?
- Stores data on server — does your invoice data leave your device and get saved by the tool?
- GDPR compliant — does the tool publish a privacy policy covering EU data subjects, and offer a Data Processing Agreement (DPA) for business customers?
- Tracks users — does the tool embed third-party analytics (Google Analytics, Segment, Mixpanel, etc.) that observe your behaviour?
- Open source — is the application code publicly auditable?
The Comparison Table
| Tool | Account required | Stores data on server | GDPR compliant | Tracks users | Open source |
|---|---|---|---|---|---|
| invoicePrivate | ✅ No | ✅ No — browser only | ✅ Yes — by design | ✅ No cookies / no GA | ❌ No |
| Invoice-Generator.com | ✅ No | ⚠️ PDF rendered server-side | ⚠️ Basic policy only | ❌ Google Analytics | ❌ No |
| FreshBooks | ❌ Yes | ❌ Yes — cloud database | ✅ Yes — DPA available | ❌ Multiple trackers | ❌ No |
| Wave | ❌ Yes | ❌ Yes — cloud database | ✅ Yes — DPA available | ❌ Google Analytics | ❌ No |
| Zoho Invoice | ❌ Yes | ❌ Yes — cloud database | ✅ Yes — DPA available | ❌ Zoho analytics | ❌ No |
| Invoice Ninja | ❌ Yes (cloud) / ✅ Optional (self-hosted) | ❌ Yes (cloud) / ✅ Your server (self-hosted) | ✅ Yes — self-hosted is fully compliant | ⚠️ Cloud version has tracking | ✅ Yes — fully open source |
| Invoice Simple | ❌ Yes | ❌ Yes — cloud database | ⚠️ Basic policy only | ❌ Multiple trackers | ❌ No |
| Bonsai | ❌ Yes | ❌ Yes — cloud database | ✅ Yes — DPA available | ❌ Multiple trackers | ❌ No |
| Invoicely | ❌ Yes | ❌ Yes — cloud database | ⚠️ Policy exists, no DPA | ❌ Google Analytics | ❌ No |
| PayPal Invoicing | ❌ Yes (PayPal account) | ❌ Yes — PayPal servers | ✅ Yes — enterprise DPA | ❌ Extensive tracking | ❌ No |
Tool-by-Tool Breakdown
invoicePrivate
Built on a local-first architecture: all invoice data is stored in your browser's IndexedDB, PDF generation runs entirely in-browser using pdf-lib, and no user account is required. There is no server that ever receives your invoice data. Analytics are handled via Plausible — a cookieless, privacy-friendly service — and no first-party cookies are set. The privacy policy is one of the shortest we've seen, because there is genuinely nothing to disclose about data handling: no data is handled.
Notable limitation: Not open source, so you can't audit the code yourself — though you can verify server-side data flows are absent using browser DevTools.
Invoice-Generator.com
One of the most-used "no account" invoice tools. You can create and download a PDF without registering. However, watch the network tab as you click "Download PDF" — the entire invoice is transmitted to their server for server-side PDF rendering. The data is not persisted in a database (per their policy), but it does leave your browser. Google Analytics is present and observes session behaviour.
Bottom line: Better than requiring an account, but your invoice data does touch their servers during PDF generation.
FreshBooks
A mature, enterprise-grade accounting platform. Requires registration and stores all invoice data in their cloud. Has a published DPA for GDPR customers and passes GDPR compliance checks for business use — but only if you properly execute the DPA. Multiple third-party tracking scripts are loaded on the platform. If your clients are individual consumers under GDPR, you'd need a DPA with FreshBooks before using it to process their personal data.
Wave
A popular free-tier accounting tool (now owned by H&R Block). Registration required, cloud storage mandatory. Offers a DPA for EU/EEA customers. Google Analytics is embedded. The business model is to upsell payments and payroll — invoice creation is free because your data funds the platform's analytics and product improvement.
Zoho Invoice
Part of the Zoho suite. Account required, data stored in Zoho's cloud infrastructure. Strong GDPR documentation — DPA available, ISO 27001 certified. Has its own analytics stack rather than Google Analytics, but tracking is still present. A solid enterprise choice if compliance documentation is your primary concern.
Invoice Ninja
The most interesting entry in this list because it's genuinely open source (AGPL licence). The self-hosted version gives you full control: your data stays on your own server, no tracking, and you can audit every line of code. The cloud-hosted version at invoiceninja.com does involve server storage and some analytics. For technical users willing to self-host, Invoice Ninja is the most privacy-respecting traditional invoicing option.
Invoice Simple
Mobile-first invoicing app. Account required. Cloud storage. Limited GDPR documentation — no published DPA found at time of writing. Multiple analytics and marketing trackers detected. Primarily aimed at small tradespeople in North America where GDPR compliance is not a core concern for their typical customer.
Bonsai
Freelancer-focused platform with contracts, proposals, and invoicing bundled together. Account required, cloud storage. DPA available for GDPR. Multiple third-party analytics scripts. The value proposition is the integrated workflow rather than privacy — a reasonable trade-off if you need the full suite of freelancer documents.
Invoicely
A smaller cloud invoicing tool with a free tier. Account required, cloud storage. Has a privacy policy but no published DPA at time of writing — making formal GDPR compliance documentation incomplete. Google Analytics present.
PayPal Invoicing
Invoicing built into PayPal accounts. Requires a PayPal account (which requires identity verification). Data is stored on PayPal's servers globally. PayPal offers enterprise-grade GDPR compliance documentation, but you're also subject to PayPal's extensive tracking and data-sharing practices across its network. Not a privacy choice — a payment integration choice.
Key Patterns
Accounts and cloud storage almost always go together
Of the 10 tools we examined, 8 require account registration. Every tool that requires an account also stores your invoice data server-side. The account is the mechanism by which they associate your invoices with your identity in their database.
GDPR-compliant ≠ privacy-preserving
Several tools have excellent GDPR compliance documentation — properly executed DPAs, Sub-Processor lists, ISO certifications. This is valuable for enterprise compliance requirements. But "GDPR compliant" does not mean "doesn't collect your data." It means "collects your data with the proper legal basis and safeguards." These are very different things.
Tracking is nearly universal
Only invoicePrivate and Invoice Ninja (self-hosted) had no third-party analytics tracking. Every other tool embeds at least one external analytics service that observes user behaviour. This is standard SaaS practice and usually harmless for the invoice creator — but it means your usage patterns, session times, and feature interactions are being observed.
Open source remains rare
Invoice Ninja is the only widely-used open-source option. Open source enables independent privacy audits, which is the gold standard for trust. It doesn't automatically mean private — a self-hosted Invoice Ninja is private; an Invoice Ninja cloud account is not.
Which Tool Is Right for You?
The right answer depends on your actual requirement:
- Maximum privacy, zero data sharing: invoicePrivate (browser-only, no account) or Invoice Ninja self-hosted
- No account required but willing to touch a server: Invoice-Generator.com
- Enterprise compliance documentation (DPA, ISO): FreshBooks, Zoho, Bonsai, or PayPal
- Free with optional upgrade: Wave or Invoice Simple
- Full open-source audit trail: Invoice Ninja (self-hosted)
If your clients include EU individuals or businesses with contractual data handling requirements, the most defensible approach is either a local-first tool (no data ever leaves your device) or a tool with a properly executed DPA (your data is stored, but with legal safeguards in place).
How to Audit Any Invoice Tool Yourself
You don't have to take our word for any of this. Here's how to verify data flows for any tool:
- Open browser DevTools (F12 → Network tab) and filter by "XHR" or "Fetch." Fill in a fake invoice with dummy data and watch what network requests fire — particularly when you download the PDF.
- Check the page source for third-party script tags (Google Analytics, Segment, Facebook Pixel, etc.).
- Read the privacy policy and search for "invoice data," "store," and "sub-processors."
- Request a Data Processing Agreement — if the tool sells one, it's an admission that personal data is processed on their servers.
FAQ
Which invoice generator is most private?▼
invoicePrivate is the most private option among the tools we reviewed — no account required, all data stays in your browser's IndexedDB, PDF generated locally via pdf-lib, no third-party analytics cookies. Invoice Ninja self-hosted is an equivalent choice for users who control their own server and want an open-source codebase they can audit.
Does "GDPR compliant" mean an invoice tool doesn't collect my data?▼
No. GDPR compliance means a tool collects and processes your data with a lawful basis, proper safeguards, and appropriate documentation (like a Data Processing Agreement). It does not mean data isn't collected — in fact, offering a DPA confirms that data is being processed on their servers. GDPR-compliant and privacy-preserving are different things.
Does Invoice-Generator.com store my invoice data?▼
Based on their privacy policy and network analysis, Invoice-Generator.com transmits your invoice data to their server to generate the PDF, but does not persistently store it in a database. The data touches their server during PDF rendering and is then discarded. This is better than full cloud storage but is not the same as truly local processing.
Can I invoice clients without sharing their data with any third party?▼
Yes. Using a local-first invoice generator like invoicePrivate means your client's name, address, and payment details never leave your device. The PDF is generated in your browser and sent directly to your client — no third party ever processes the data.
Is Invoice Ninja open source?▼
Yes, Invoice Ninja is licensed under AGPL and the source code is publicly available. The self-hosted version gives you full control over your data. The managed cloud version at invoiceninja.com involves server-side storage and is not equivalent to self-hosting from a privacy standpoint.
Is Wave invoice private and secure?▼
Wave (now owned by H&R Block) requires account registration and stores all invoice data in its cloud. It has a DPA for EU customers and Google Analytics embedded. It is GDPR-compliant in the legal sense — your data is handled with documented safeguards — but your invoice data does sit on Wave's servers, associated with your account. It is not a private or local-first option.
Do invoice generators sell your data?▼
Most cloud invoice generators do not sell your raw invoice data to third parties, but most do share usage data with analytics providers (Google Analytics, Segment) and may use aggregated data for product improvements. The meaningful question is not whether they sell data, but whether your invoice data (client names, amounts, addresses) is stored on their servers at all. With invoicePrivate, it is not.
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