PDF9.Ai vs. Smallpdf Comparison


PDF9.Ai 9 Rank LLC	Smallpdf	+	+
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		Related Products Adobe Acrobat Adobe Acrobat Studio is a leading enterprise document platform built to scale for global teams — delivering AI-powered document intelligence, trusted PDF tools, and on-brand content creation in one secure solution. Core capabilities include PDF creation, editing, conversion, annotation, redaction, e-signatures, and fillable forms. AI Assistant enables conversational document intelligence across PDFs, Word docs, spreadsheets, and more — surfacing summaries, key insights, and source-linked citations for verified, audit-ready answers. PDF Spaces organizes files, collaboration, and context into centralized knowledge hubs. The Generate Presentation feature transforms any document into a polished, branded deck using AI and Adobe Express templates. Enterprise-grade encryption, admin controls, and compliance workflows support secure document sharing and high-volume document processing at scale — across Legal, Finance, HR, Sales, and more. Available on desktop, web, and mobile. 8,459 Ratings Visit Website MobiPDF MobiPDF (formerly PDF Extra) is an intuitive and powerful PDF editor and reader designed for today’s modern user - the cost-efficient alternative to Adobe Acrobat Pro you’ve been looking for. FEATURES OVERVIEW: PDF Viewer and Reader: Switch between page views or use "Read Mode" for distraction-free reading. Create and Edit PDFs: Modify text and images or start with a blank PDF. Convert to Office Formats: Easily turn PDFs into Word, Excel, PowerPoint, and image files. Leverage OCR: Transform scanned documents into searchable PDFs. Organize PDFs: Combine, split, reorder, and compress documents. Markup and Comment: Highlight, annotate, and add bookmarks or stamps. Fill PDFs: Seamlessly fill forms or create ones from scratch. Sign PDFs: Sign your documents anywhere—no ink required! Secure Your Work: Protect files with passwords, digital signatures, and 256-bit encryption. Offline Mode: Full functionality without internet access. Translate PDFs 8,085 Ratings Visit Website Foxit Document Workflow APIs Foxit provides a powerful suite of cloud-native APIs that help organizations automate, secure, and modernize document workflows. Built on scalable REST architecture, Foxit APIs enable developers to generate, convert, extract, sign, and display documents directly within applications—eliminating manual processes and accelerating digital operations. The Foxit PDF Services API supports high-volume PDF automation, including conversion, extraction, optimization, and redaction. The Document Generation API creates dynamic PDFs and DOCX files from templates and real-time business data. The Foxit eSign API embeds legally binding eSignature workflows with full audit trails and compliance support. The PDF Embed API delivers customizable in-app PDF viewing, annotations, and secure access controls. Together, Foxit APIs provide a secure, scalable foundation for end-to-end document automation and digital transformation. 8 Ratings Visit Website RAD PDF Add a fully functional PDF editor to your ASP.NET website in minutes! Compatible with 99% of desktop & mobile browsers, from Internet Explorer 6 through the latest iOS Safari release, RAD PDF simply works. No plugins or other software needed. RAD PDF natively supports the most commonly used PDF features. Beyond a PDF reader, RAD PDF equips web applications with a browser-based PDF editor & PDF annotator. Features not even available in Adobe Acrobat Reader can be used to provide advanced PDF functionality. By enabling PDF form filling, PDF redaction, & PDF signing directly in the web browser, RAD PDF users can utilize PDF features without worrying about having the right platform or software installed! Allow your app to design new PDF forms, protect content, sign PDFs, & more using an intuitive graphical user interface (GUI). Client (JavaScript) and server APIs allow for endless possibilities .NET Core, Framework, & .NET 5+ supported Try editing any PDF with RAD PDF, FREE! 3 Ratings Visit Website Adobe Experience Manager Adobe Experience Manager is a content management platform that integrates digital asset management, content management systems, and digital enrollment tools. The platform features AI-based agents that automate workflows, governance, and content optimization. Experience Production Agent streamlines site updates and content migration, while Content Optimization Agent adapts content for different channels. The system includes a comprehensive digital asset management solution that facilitates rapid sourcing and delivery of assets, minimizing time spent on content adjustments. Digital forms and guides functionality enables streamlined form creation and e-signature capabilities for enhanced document management. Additional components include learning manager for educational content delivery and digital guides for documentation management. The platform connects these various elements to create a cohesive system for managing digital content across multiple touchpoints. 1,901 Ratings Visit Website StackAI StackAI is an enterprise AI automation platform to build end-to-end internal tools and processes with AI agents in a fully compliant and secure way. Designed for large, regulated organizations, it enables teams to automate complex workflows across operations, compliance, finance, IT, and support without heavy engineering. With StackAI you can: • Connect knowledge bases (SharePoint, Confluence, Notion, Google Drive, databases) with versioning, citations, and access controls • Publish AI agents as chat assistants, advanced forms, or APIs integrated into Slack, Teams, Salesforce, HubSpot, or ServiceNow • Govern usage with enterprise security: SSO (Okta, Azure AD, Google), RBAC, audit logs, PII masking, data residency, and cost controls • Route across OpenAI, Anthropic, Google, or local LLMs with guardrails, evaluations, and testing • Deploy in multi-tenant cloud, dedicated cloud, private cloud, or on-premise 55 Ratings Visit Website Apryse PDF SDK Apryse (formerly PDFTron) powers the future of document technology. We help businesses, developers, and enterprises handle documents with unmatched speed, accuracy, and security. Whether running in secure server environments or delivering seamless web-based experiences, Apryse makes document workflows smarter and easier. With Apryse, you can: Embed powerful document features directly into your apps — from viewing and editing to collaboration and compliance. Run at enterprise scale on secure server infrastructure, ensuring reliability without cloud dependencies. Deliver seamless in-browser document experiences with responsive, accessible, and feature-rich web capabilities. Trusted globally, Apryse empowers organizations to simplify operations, enhance productivity, and create exceptional document experiences. 172 Ratings Visit Website Retool Securely deploy vibe-coded apps in one governed platform. Build in Retool, import from tools like Claude Code, Replit, or Lovable, or connect via MCP. However your team builds, every app ships safely, with governance built in. People across your organization are already vibe-coding internal tools with no SSO, no RBAC, no audit logs, and no connection to your existing data controls. Retool is where secure vibe coding happens by default. Build from scratch, import an app from another AI builder, or connect an agent via MCP — governance lives in the platform, not in each individual app. 598 Ratings Visit Website Titan Build the forms, portals, documents, eSignatures, surveys, and workflows your business needs while keeping Salesforce at the center of it all. Titan brings these experiences into a single Salesforce-first platform, with data connected to Salesforce in real time rather than creating another place for it to live. Give customers, partners, and employees secure ways to interact with Salesforce. Collect and update information through dynamic forms, build branded portals, generate documents from Salesforce data, collect signatures, run surveys, and automate complex business processes. For forms and portals, Titan AI Studio gets you to a strong first version faster. Describe what you need in plain language and Titan creates the structure, fields, styling, and Salesforce mapping. Then refine the details in the visual builder. Titan AI understands your Salesforce data model, including objects, fields, and relationships, without accessing sensitive Salesforce record data. You get AI-assisted speed while staying in control of what gets built and how it works. Experience Studio and Document Studio bring these capabilities together, giving Salesforce teams one platform to build and manage customer-facing experiences, documents, and business processes. 378 Ratings Visit Website Nutrient SDK Nutrient is the comprehensive solution for all your PDF needs, offering tools that effortlessly integrate and operate PDF functionality across any platform. 1. SDK PRODUCTS Integrate robust PDF functionality into iOS, Android, Windows, web (JavaScript), or any cross-platform technology, providing capabilities such as PDF viewing, markup, collaboration, and more. 2. LIBRARIES Utilize our potent .NET and Java libraries to boost your backend applications with batch processing of redactions and PDF forms, OCR’d scanned text, and editing of PDF documents, directly from your application server. 3. PROCESSOR Our dynamic PDF microservice, Processor, enables swift generation of PDFs from HTML, including HTML forms, along with Office-to-PDF conversions, OCR, redaction, and XFDF merging and exporting. 4. PDF API Use hosted PDF API to generate, convert, and modify PDF documents in your workflows. We manage the development and server administration, letting you focus on what you do best. 113 Ratings Visit Website
About PDF9.Ai is a free, AI-powered PDF workspace that brings 68 tools into a single browser-based platform. It includes a PDF reader, full-featured editor, conversion suite, e-signature tools, and enterprise governance controls. Most operations run entirely in-browser, so files never leave the user's device. Nine built-in AI models enable document chat, summarization, and translation into 50+ languages at no extra cost. Key capabilities include merging, splitting, compressing, and organizing PDFs; converting to and from Word, Excel, PowerPoint, HTML, CAD, and image formats; OCR; PAdES/PKCS#7 digital signatures with audit trails; smart PII redaction; form filling for U.S. government forms; and document comparison. PDF9.Ai serves students, freelancers, legal professionals, accountants, HR teams, and enterprises. Teams benefit from SSO, RBAC, audit logs, and compliance-aligned infrastructure. Desktop apps are available for Windows and macOS.	About Made in Switzerland, the land of watches, banks, and clean design, Smallpdf is an award-winning company that offers a suite of clever document management tools for everyone—for work, for home, for life. Founded in 2013, Smallpdf provides a simple, secure, and reliable answer to heavy, awkward PDF software. By removing unnecessary features and adding a deep focus on user experience, Smallpdf has become the most-loved and most-trusted PDF software on the planet, serving over 500 million users, 100,000 different companies, in 24 different languages, and in every country in the world—even Antarctica! Smallpdf integrates seamlessly with professional and personal tasks, boosting productivity and simplifying the way people manage their documents, with tools to compress, convert, edit, sign, protect, and unlock PDF documents in just a few easy steps.
Platforms Supported Windows Supported Mac Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported	Platforms Supported Windows Supported Mac Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Supported iPad Supported Android Supported Chromebook Not Supported
Audience All Businesses, Government, Education, Individuals	Audience Everyone
Support Phone Support Not Supported 24/7 Live Support Not Supported Online Supported	Support Phone Support Supported 24/7 Live Support Not Supported Online Supported
API Offers API Supported	API Offers API Not Supported
Screenshots and Videos View more images or videos	Screenshots and Videos View more images or videos
Pricing $12 per month PDF9 AI offers a free version with access to core PDF tools. Paid plans are available for additional features. Free Version Supported Free Trial Not Supported	Pricing $7/month/user $84/year or $10/month. Free Version Supported Free Trial Supported
Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software	Reviews/Ratings Overall 5.0 / 5 ease 4.7 / 5 features 4.3 / 5 design 4.3 / 5 support 4.7 / 5 Read all reviews
	Pros & Cons from Real Users Pros Absolutely love that SmallPDF is available through a web browser, meaning we do not need to download and install any software and that it is accessible anywhere we are regardless of which computer we are using. It has most the features we use for editing PDFs including inserting text and converting PDF files to Word, and it integrates nicely with Google Suite. The overall design and UX is also very slick and intuitive. The convenience of being able to convert to and from PDFs, along with a range of file manipulation options whenever I want, makes Smallpdf a no-brainer compared to the the huge expense and bloated nature of the market leader. It does exactly what I need it to do, 95% of the time, the balance is usually page "overflow" and not hard to rectify. How easy it is to use, and the price. Also, the style is beautiful. And you can compress the document right after editing and signing it. Cons Coming from someone who also uses Nitro Pro, SmallPDF is missing the feature to directly edit existing text and images on a PDF file while retaining original formatting. This means I have to occasionally revert back to Nitro Pro if I need to edit existing text and images on PDF files (as opposed to adding text or images to PDF files, which is what SmallPDF can do). The service could do with a custom option - there are tools I use all the time but there is no option to have shortcuts to these particular tools on the main menu. As a subscriber it would make sense to have that option rather than having to go through the whole list of tools to select the same thing each time. Conversion from pdf to jpg is not high resolution so the images do not stand up well on a web site. The Word to PDF conversion does not like "tight" pages and will overflow a two-page Word file into 3 pages of PDF, which can be frustrating but if you are aware of the problem then you can adjust the volume of copy accordingly to compensate. I would like to have more featured with editing my documents.
Training Documentation Supported Webinars Not Supported Live Online Not Supported In Person Not Supported	Training Documentation Supported Webinars Not Supported Live Online Not Supported In Person Not Supported
Company Information 9 Rank LLC Founded: 2025 United States pdf9.ai/	Company Information Smallpdf Founded: 2013 Switzerland smallpdf.com
Alternatives Adobe Acrobat Adobe	Alternatives Adobe Acrobat Adobe
PDFsail	MobiPDF MobiSystems
Adobe Acrobat Studio Adobe	PDF Studio Apryse
DonePDF	SODA PDF Avanquest
Instafill Botmakers LLC View All	Foxit PDF Editor Foxit Software View All
Categories AI PDF Supported	Categories Digital Signature Supported Document Management Supported PDF Supported PDF Compressors Supported PDF Converters Supported PDF Editors Supported PDF Encryption Supported PDF Merge Supported PDF Readers Supported PDF Splitters Supported
	Show More Features Digital Signature Features Audit Trail Not Supported Authentication Supported Auto Reminders Not Supported Customizable Templates Not Supported Document Analytics Not Supported Mobile Signature Supported Multi-Party Signing Supported Progress Tracking Supported Task Progress Tracking Supported Document Management Features Access Controls Not Supported Archiving & Retention Not Supported Collaboration Tools Supported Compliance Tracking Not Supported Document Archiving Not Supported Document Assembly Not Supported Document Capture Not Supported Document Conversion Supported Document Delivery Not Supported Document Indexing Not Supported Document Retention Supported Electronic Signature Supported Email Management Not Supported File Recovery Not Supported File Type Conversion Supported Forms Management Not Supported Full Text Search Not Supported Offline Access Supported Optical Character Recognition Supported Print Management Not Supported Version Control Not Supported PDF Features Annotations Supported Convert to PDF Supported Digital Signature Supported Encryption Supported Merge / Append Supported PDF Reader Supported Watermarking Not Supported PDF Editors Features Access Controls / Permissions Supported Annotations Supported Commenting / Notes Supported Compare Side-by-Side Not Supported Customizable Branding Not Supported Delete Pages Supported Electronic Signature Supported Forms Management Not Supported Full Text Search Not Supported Merge / Append Supported Offline Access Supported Optical Character Recognition (OCR) Supported Rearrange Pages Supported Rotate Pages Supported Watermarking Not Supported
Integrations Claude Supported Desktop.com Not Supported Dropbox Not Supported Gemini Supported Google Cloud AI Infrastructure Supported Google Drive Not Supported OpenAI Supported Stripe Supported Wasabi Supported View All 6 Integrations	Integrations Claude Not Supported Desktop.com Supported Dropbox Supported Gemini Not Supported Google Cloud AI Infrastructure Not Supported Google Drive Supported OpenAI Not Supported Stripe Not Supported Wasabi Not Supported View All 3 Integrations
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