Nitro PDF (now Nitro Software) is a long-established commercial PDF software provider, headquartered in Australia. Its flagship product, Nitro Pro, is a paid desktop PDF editor positioned as a more affordable alternative to Adobe Acrobat Pro. Nitro also offers Nitro Sign for e-signature workflows.
PDFGrover is a free, web-based PDF toolkit. Nitro Pro is a paid, desktop-first product. This page covers the genuine differences. Pricing and feature lists change — always check Nitro's site for current details.
Quick take
Use Nitro Pro if you want:
- A full-featured desktop PDF editor (Mac, Windows)
- A more affordable alternative to Adobe Acrobat Pro for organisations
- Integrated e-signature workflows with audit trails (Nitro Sign)
- Office-style ribbon interface familiar to Microsoft Office users
- Enterprise licensing (volume, SSO, deployment) for teams
Use PDFGrover if you want:
- Free PDF tools without subscription or signup
- Common PDF tasks handled in your browser
- A focused web toolkit covering everyday needs
- Privacy-by-architecture for many tools (no upload)
At-a-glance positioning
Nitro's pricing and product mix change. Check Nitro's pricing page for current details.
| PDFGrover | Nitro PDF (Pro) | |
|---|---|---|
| Account required | No | Yes (license activation) |
| Cost | Free | Paid (perpetual license or subscription, varies by region/tier) |
| Desktop apps | No (web only) | Yes (Mac, Windows — primary product) |
| Mobile apps | No | Yes (iOS, Android) |
| Web version | Yes (primary) | Yes (Nitro Cloud) |
| Free trial | N/A (always free) | Yes (typically 14-day Nitro Pro trial) |
| E-signature workflow | No (visible signature only) | Yes (Nitro Sign — paid product) |
| Microsoft 365 integration | No | Yes |
| Enterprise (SSO, deployment) | No | Yes |
| OCR | Yes (free) | Yes (in Pro) |
| Browser-side processing | Yes (most tools) | N/A (desktop product) |
Pricing approach
PDFGrover: Free for all tools, no tiers, no signup.
Nitro Pro: Paid software, sold as either a perpetual license or a subscription. Pricing tiers exist for individual, team, and enterprise. Generally positioned as more affordable than Adobe Acrobat Pro for similar feature depth. A free trial is available before purchase.
Nitro Sign: Separate paid product (or bundled with some Nitro Productivity tiers). Provides multi-party e-signature workflows with audit trails.
What Nitro Pro offers that PDFGrover doesn't
Desktop application
Nitro Pro is fundamentally a desktop application — installed locally, runs offline, integrates with the OS. Heavy operations (large file editing, batch processing) run on your local CPU rather than over a network.
PDFGrover is web-only. For fully-offline work, Nitro Pro (or another desktop tool) is necessary.
Microsoft 365 integration
Nitro Pro integrates with Microsoft Word, Excel, PowerPoint, and Outlook — convert documents to PDF directly from the Office ribbon, sign attachments from inside Outlook, etc.
PDFGrover doesn't offer Office add-ins. Conversion from Office to PDF is supported as a standalone web tool.
E-signature workflow (Nitro Sign)
Nitro Sign provides:
- Multi-party signature collection
- Sequential or parallel signing flows
- Audit trail (who signed when, from what device)
- Templates for repeated documents
- Integration with CRM and document management
PDFGrover offers a visible signature placement on PDFs but not a multi-party signing workflow.
For business contract workflows requiring auditing and multi-signer routing, Nitro Sign (or DocuSign / Adobe Sign) is the right tool.
Enterprise deployment
Nitro Pro supports:
- Volume licensing
- SSO (single sign-on)
- Centralised deployment via MSI / device-management tools
- Compliance with corporate IT requirements
PDFGrover is consumer-facing only and doesn't have enterprise licensing.
Office-style ribbon interface
Nitro Pro's interface mirrors Microsoft Office's ribbon — familiar to anyone who uses Word/Excel daily. Lower learning curve for office workers compared to less-Office-like tools.
PDFGrover is a web app with simpler interfaces per tool — different paradigm, both work for their respective use cases.
What PDFGrover does as well or differently
For everyday PDF tasks (merge, split, compress, convert, sign with visible signature):
- Both produce standard PDFs — interoperable, no proprietary formats
- Both compress effectively — output sizes are comparable
- Both convert PDF to/from Office formats — conversion fidelity is similar for typical documents
- Both support OCR — Nitro in the paid product, PDFGrover free
PDFGrover differentiators:
- Free — no purchase, no subscription, no license activation
- Web-based — works on any device with a browser, no install
- Browser-side processing for most tools — file never leaves your device
- No signup for any tool
Privacy and data handling
Nitro: When using Nitro Pro desktop, files stay on your local machine — no cloud involvement unless you opt in to Nitro Cloud features. When using Nitro Cloud (web), files are uploaded to Nitro's servers; check their privacy policy for current retention and security details. SOC 2 / ISO 27001 certifications available for enterprise.
PDFGrover: Most tools run in your browser — no upload. Server-side tools (OCR, large compression, Office conversions) upload over HTTPS and delete on response. No account, no file retention.
For desktop-resident workflows where files must never leave the local machine, Nitro Pro on a managed corporate desktop is the right architecture. For ad-hoc web use without account creation, PDFGrover.
When Nitro Pro is the better pick
- You want a desktop PDF editor that runs offline and integrates with the OS.
- You're already in the Microsoft Office ecosystem — Nitro's Office integration is genuinely useful for daily Office users.
- You need e-signature workflows with audit trails — Nitro Sign covers this.
- You're an organisation evaluating Adobe Acrobat alternatives — Nitro is the most direct, well-supported alternative.
- You need enterprise IT features (volume licensing, SSO, MSI deployment).
- You handle high volumes of complex PDFs where desktop performance matters.
When PDFGrover is the better pick
- You don't want to pay for a PDF tool.
- Your tasks are common — merge, split, compress, convert, sign with visible signature.
- You're a casual PDF user — a few files per week, not professional daily use.
- You prefer web tools — no install, works on any device.
- You want to avoid account creation for one-off tasks.
- You're evaluating alternatives to paid tools before deciding to buy.
How to decide
Are you doing PDF work professionally and daily? Yes → Nitro Pro (or Adobe Acrobat). No → PDFGrover.
Do you need offline desktop work? Yes → Nitro Pro. No → PDFGrover web is fine.
Do you need multi-party e-signature workflows? Yes → Nitro Sign or DocuSign or Adobe Sign. No → PDFGrover's signature tool plus email is enough.
Are you in an enterprise IT environment? Yes → Nitro Pro with enterprise licensing. No → PDFGrover.
What's your budget? Zero → PDFGrover. Annual software budget → consider Nitro Pro (often cheaper than Adobe Acrobat Pro for similar features).
Frequently asked
Is Nitro Pro really cheaper than Adobe Acrobat Pro? Generally yes — Nitro positions itself as a more affordable Acrobat alternative. Exact pricing depends on tier (perpetual vs subscription), region, and team size. Compare Nitro's pricing and Adobe's pricing for current rates.
Can I use PDFGrover instead of buying Nitro Pro? For everyday tasks, yes. For professional features (e-signature workflows with audit, advanced editing, enterprise deployment), no — Nitro Pro covers things free web tools don't.
Will Nitro-edited PDFs work in PDFGrover and vice versa? Yes. Both produce standard PDFs that work in any PDF reader.
Does Nitro have a free version? Nitro Pro is paid. Nitro PDF Reader (their free reader, view + basic annotation) exists separately. PDFGrover's free toolkit covers more transformation features than Nitro PDF Reader does.
Should I use Nitro Sign or DocuSign for e-signatures? Both are reasonable. Nitro Sign is often bundled with Nitro Pro at a competitive price; DocuSign is the market leader with broader integrations. Pick based on your workflow and existing tool stack.
The bottom line
Nitro Pro is a solid, well-established commercial PDF editor — a good choice for organisations seeking a more affordable Adobe Acrobat alternative or for users who want a desktop application with Office-style interface and integration.
PDFGrover is a free, web-based toolkit covering the common PDF tasks at zero cost. For occasional users, individuals, and tasks that don't require enterprise features, it's enough.
If you're evaluating commercial PDF software, try Nitro Pro's free trial alongside Acrobat Pro and PDFGrover. The right answer depends on what features you'll actually use.
Try PDFGrover → free, no signup. Visit Nitro for current pricing and product details.