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Sift VS KeptPDF

Compare Sift VS KeptPDF and see what are their differences

Sift

Digital Trust & Safety enables your business to grow, innovate, introduce new products, features, and business models – without increased risk.

Sift Landing page
Rating
0 reviews
Alternatives Is it good?
KeptPDF

Redact, edit, OCR, and sign PDFs entirely in your browser. The file never leaves your device. Free, no account needed.

KeptPDF Landing page
Rating
0 reviews
Pricing
Freemium $29 / Monthly (Pro, 1 user)
Alternatives Is it good?
happySEO
Create ai humanized SEO content tailored for ecommerce and small businesses with HappySEO tools. From ai writer to keyword research and analyze tools. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Sift seems to be more popular. It has been mentioned 3 times since March 2021.

social mentions
3 vs 0
Fraud Prevention popularity
100% vs 0%
alternatives listed
240+ vs 12

Base details

Website, pricing, platforms and company facts side by side.

Sift
KeptPDF
Website sift.com keptpdf.com
Pricing —
Freemium $29 / Monthly (Pro, 1 user) Official pricing
Company Startup from the United States · 100 - 249 employees · 2011 Startup from the United States · 2026
Listed in
Digital Trust Fraud Prevention Fraud Detection And Prevention Fraud Tools Fraud Protection +2
PDF Tools Pdf Redaction OCR PDF Editor PDF Security & Privacy PDF Readers And Editors AI Tools +5

About Sift and KeptPDF

In their own words, as submitted to SaaSHub.

Sift
KeptPDF

No description of Sift yet.

KeptPDF is a PDF toolkit that runs entirely in your browser. Nothing uploads: every tool runs on your own device, so the document never touches a server. What it does: Redaction that auto-detects names, SSNs, phone numbers, addresses, and dates, then removes the underlying text instead of drawing...

Read more about KeptPDF

Features and specs

What each product offers, as listed by its team.

Sift 5 features
KeptPDF 5 features
  • Comprehensive Fraud Detection
    Sift provides extensive fraud detection capabilities using machine learning, which helps businesses reduce fraudulent activities and associated costs.
  • Real-Time Analysis
    The platform offers real-time analysis, allowing businesses to make instant decisions and block fraudulent transactions as they occur.
  • User-Friendly Interface
    Sift features a user-friendly interface that makes it easier for teams to navigate and utilize the platform effectively, even without extensive technical knowledge.
  • Scalability
    Sift is designed to scale with your business, accommodating varying levels of transactional volume without compromising performance.
  • Comprehensive Reporting
    The platform offers detailed reporting and analytics, providing valuable insights into fraud patterns and helping businesses optimize their prevention strategies.

Possible disadvantages

  • Cost
    Sift can be expensive, especially for small businesses or startups with limited budgets, as the pricing is generally tailored toward larger enterprises.
  • Complex Implementation
    The initial setup and integration of Sift into existing systems can be complex and time-consuming, requiring technical expertise.
  • Learning Curve
    Despite its user-friendly interface, there is still a learning curve associated with understanding and maximizing the platform's capabilities.
  • Dependence on Data Quality
    The effectiveness of Sift's machine learning models depends heavily on the quality and volume of data provided, which means businesses need to ensure they have robust data collection practices.
  • Limited Customization
    Some users may find the level of customization and flexibility in Sift to be limited compared to other platforms, potentially restricting business-specific adaptations.
  • Simple PDF Editing
    KeptPDF offers straightforward tools for editing, merging, splitting, and converting PDF files, making it accessible for users who need quick document management without a steep learning curve.
  • Web-Based Accessibility
    Being a web-based tool, KeptPDF can be accessed from any device with an internet connection, eliminating the need for software installation and allowing use across different operating systems.
  • Multiple File Format Support
    The platform supports conversion between PDF and various other file formats, offering flexibility for users who work with documents in different formats.
  • No Installation Required
    Since it operates in a browser, users can save storage space on their devices and avoid compatibility issues that sometimes arise with desktop software installations.
  • Quick Processing
    KeptPDF is designed to process PDF tasks efficiently, allowing users to complete common document tasks like compression or conversion in a relatively short amount of time.

Analysis

An editorial look at what each product does well and who it suits.

Sift
KeptPDF

Overall verdict

  • Sift is generally considered good for businesses that need robust fraud detection and prevention solutions. However, its effectiveness may vary depending on specific business needs and integration capabilities. It's advisable for businesses to assess their requirements and trial the product if possible.

Why this product is good

  • Sift (sift.com) is a company that specializes in providing digital trust and safety solutions. It uses machine learning to help businesses prevent fraud, secure payments, and protect their platforms from various threats. Its services are beneficial for companies seeking advanced security measures, effective fraud prevention, and an improved user experience due to reduced false positives.

Recommended for

  • E-commerce platforms seeking to reduce chargebacks and fraudulent transactions
  • Online marketplaces aiming to prevent account takeovers and protect user data
  • Payment processors needing to secure transactions and minimize risk
  • Any business requiring enhanced security measures for digital operations

No analysis of KeptPDF yet.

Videos

Walkthroughs and reviews on video.

Sift 3 videos + Add
KeptPDF 0 videos + Add

🙀 Review - Scoopless Lift and Sift Cat Litter Box I Modified it after One Week of Usage

More videos

  • Review - REVIEW: Sift And Lift Litter Box / Best Clean Cat Litter Sand
  • Review - U.S. Army aviation - SIFT Test Preparation - Army Selection Instrument for Flight Testing

No KeptPDF videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Sift
KeptPDF
100% 100%
Fraud Prevention
0% 0%
0% 0%
PDF
100% 100%
100% 100%
eCommerce
0% 0%
0% 0%
PDF Readers And Editors
100% 100%

Questions & Answers

As answered by people managing Sift and KeptPDF.

What makes your product unique?

KeptPDF's answer:

KeptPDF runs entirely in your browser. Your file, and the text inside it, never leaves your device. Not to an AI, not even to us. You can open your browser's network tab and watch: the document bytes never go out.

Most online PDF tools upload your file to a server first, and some "AI redaction" services quietly send your document text to a third-party model. That is the exact risk people are trying to avoid when they redact something.

KeptPDF also does true redaction. The text is removed from the file, not covered with a black box you can copy out later. Every redaction produces a verification certificate you can share with the file.

Why should a person choose your product over its competitors?

KeptPDF's answer:

Three reasons.

Privacy you can verify, not just a promise. Processing happens locally in the browser, so there is no upload step to trust. We do send anonymous usage counts for quota, and we say so plainly, but never your document.

Real redaction with proof. Removed text is permanently gone, and you get a certificate showing the file was checked for leftover extractable text. Automated detection cannot catch everything, so a final human review is still your job, and the tool says that too.

It works on a phone. Most PDF suites assume a desktop. KeptPDF was built and used on a phone first, so redacting a document while you are standing in a hallway actually works.

How would you describe the primary audience of your product?

KeptPDF's answer:

Anyone who has to hand a document to someone else and needs the sensitive parts gone first.

In practice that is solo attorneys and small law firms, accountants and tax preparers, healthcare and records staff handling requests, HR teams, and individuals dealing with their own medical, legal, or financial paperwork.

The common thread is not an industry. It is a person who cannot upload a confidential file to a random website, and who does not have an enterprise IT budget to solve it.

What's the story behind your product?

KeptPDF's answer:

A family member got seriously ill. We spent most days at the hospital, and straight answers were hard to come by, so we leaned on AI tools to make sense of the records, notes, and lab results.

But you cannot paste a medical record into an AI chat. You have to strip the names, the ID numbers, the diagnoses first. And almost every tool we found either wanted to upload the whole file to a server, or "auto-redacted" by sending the document text to an online AI. That was the exact thing we were trying to avoid.

Most of this was happening on a phone, at a bedside. So I built the tool I needed: redaction that runs on the device, works on mobile, and never sends the file anywhere. That turned into KeptPDF, which is now a full PDF suite with over 20 tools, all local-first.

Which are the primary technologies used for building your product?

KeptPDF's answer:

The app is plain JavaScript with no front-end framework, which keeps it fast and keeps the code auditable.

PDF work happens in the browser using pdf.js for rendering and pdf-lib for writing. Text recognition uses Tesseract running as WebAssembly. Password and encryption handling uses a WebAssembly build of qpdf. It is a Progressive Web App, so it installs and works offline.

The thin server side is Node on Vercel, with Postgres for accounts, Stripe for billing, and Resend for email. None of those ever see a document.

Who are some of the biggest customers of your product?

KeptPDF's answer:

KeptPDF is early and independent, and we do not publish customer names. The product is privacy-first by design: we never see your documents, and we do not track who our users are or what they work on. Publishing a client list would sit badly next to that.

The user base today is mostly solo attorneys, small firms, accountants, and individuals handling their own records.

User comments

Share your experience with using Sift and KeptPDF. For example, how are they different and which one is better?

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Sift 3 mentions
KeptPDF 0 mentions
  • Warning about centre com
    They may be using something like Sift for security checking and something of yours was flagged. Source: almost 4 years ago
  • Does this idea exist? Thought? Any legal implications?
    But sorry to break it to you, this has been done at a really large scale already although most consumers are not aware. One big player here is https://sift.com/ Almost every major retailer uses their service exactly for the reasons you... Source: about 5 years ago
  • LPT: You have a secret 'consumer score' that acts like your credit score; You can be denied the ability to return products, charged higher prices than other people, and more, all based on this score.
    Reddit, for one. A pretty big list on their homepage. Source: about 5 years ago

Tracking KeptPDF since Aug 2026.

Alternatives to Sift and KeptPDF

When comparing Sift and KeptPDF, you can also consider the following products.

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