Software Alternatives & Startups

PDFTrackr VS s3-lambda

Compare PDFTrackr VS s3-lambda and see what are their differences

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PDFTrackr logo PDFTrackr

See who really read your proposal, deck, or report, with bots filtered out of your counts. Signals then tell you who's interested and worth a follow-up, so you follow up at the right moment and win more deals. Free; Pro $9/mo or $84/yr.

s3-lambda logo s3-lambda

Lambda functions over S3 objects: each, map, reduce, filter
  • PDFTrackr Know if they actually read it - verified-human views
    Know if they actually read it - verified-human views //
    2026-07-24
  • PDFTrackr See the exactly page where they stopped
    See the exactly page where they stopped //
    2026-07-24
  • PDFTrackr Viewer sessions - who came back for a second look
    Viewer sessions - who came back for a second look //
    2026-07-24
  • PDFTrackr You decide who see it
    You decide who see it //
    2026-07-24
  • PDFTrackr Mobile viewer - no app or signup for recipients
    Mobile viewer - no app or signup for recipients //
    2026-07-24

Every proposal, pitch deck, or client report you send can win or lose a deal, and PDFTrackr tells you exactly how it landed. Share it as a secure tracked link and see who opened it, which pages they read, how long they spent, and where they dropped off, with bots and email scanners filtered out of your counts so the numbers are real.

The part worth paying for is Signals: the analysis done for you. Instead of a table to decode, you see who came back for a second look, who's genuinely engaged, and who's worth a call right now, with a per-recipient verdict on whether a specific person read it and a real-time alert the moment they open it or return to it.

You also control who can open a document at all. Allow lists name the addresses permitted to view it, block lists shut an address out and end any session it already holds, and email verification requires a six-digit code before the file opens, so a read belongs to a confirmed identity rather than a typed-in name. Passwords, expiry, download control, per-page watermarking and virus scanning apply on every link.

Free is complete: 500MB, 50 files, full page-by-page analytics, 12-month history, geography and device data, no credit card. Pro ($9/month or $84/year) adds 10GB, 500 files, unlimited links, 24-month history, Signals, per-recipient verdicts, open and return-visit alerts, Reading Reports, allow/block lists, verified viewer email, CSV export, bulk personalized links, watermarking, folders and versioning. Every new account runs on Pro free for 14 days, then continues on the free plan rather than losing access.

Built for sales teams, consultants, agencies and founders who sell with documents.

  • s3-lambda Landing page
    Landing page //
    2022-11-04

PDFTrackr

$ Details
freemium $9 / Monthly (Pro (or $84/year), 14-day trial)
Platforms
Web
Release Date
2025 August
Startup details
Country
Poland
Founder(s)
Oleh Tsyupa
Employees
1 - 9

s3-lambda

Website
github.com
Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

PDFTrackr features and specs

  • Signals
    See who came back and who's worth a follow-up, so you act on real buyers
  • Reading Reports
    An emailed report of exactly how each document was read
  • Per-recipient verdict
    One honest line on whether a specific person actually read it
  • Viewer watermark
    Per-page watermark with the viewer's email and timestamp
  • Document versioning
    Replace the file behind a live link and restore prior versions
  • Bot-filtered counts
    Bots and email scanners are removed from your view counts, and the dashboard shows exactly what was filtered
  • Bulk links & CSV export
    Send personalized links to your whole list and export viewers to CSV
  • Virus scanning
    Every upload is scanned before it can be shared. No competitor offers this at any tier
  • Page-by-page analytics
    Per-page reading time and the exact page each viewer stopped on. Included on the free plan
  • 12-month analytics history
    Free keeps 12 months of view history, Pro keeps 24. Most rivals cap the free plan at 30 days
  • Email capture gate
    Optionally require the viewer's email before the document opens, so every session is attributable
  • Password Protection
    Per-link password with brute-force lockout after 5 failed attempts in 15 minutes
  • Link expiration
    Set a date after which the share link stops working
  • Download controls
    Turn downloads off per link, or leave them on and see the download count and rate
  • Folders
    Organise documents into folders (Pro)
  • Drop-off funnel
    Shows where readers stop — "biggest drop after page 3"
  • Geography & device
    Country-level location and device type per view. IP is hashed for lookup, then discarded
  • Quick share
    Create a tracked link in one click, without configuring any gates

s3-lambda features and specs

  • Batch processing of S3 objects
    s3-lambda provides a straightforward way to perform batch operations on large numbers of S3 objects, enabling map, filter, and reduce-style processing over entire S3 buckets or prefixes without writing boilerplate code.
  • Familiar functional API
    The library uses a functional programming paradigm with operations like map, filter, and reduce, making it intuitive for JavaScript developers to process S3 objects using patterns they already know.
  • Built-in concurrency control
    s3-lambda handles parallel processing of S3 objects with configurable concurrency, allowing users to control how many operations run simultaneously and avoid overwhelming AWS resources or hitting rate limits.
  • Context-aware operations
    The library provides a context object within each operation that includes useful metadata about the current object being processed, simplifying access to S3 object properties during transformations.
  • Easy integration with Lambda
    Designed to work seamlessly within AWS Lambda functions, making it straightforward to set up event-driven, serverless pipelines for processing large volumes of S3 data without managing infrastructure.

Possible disadvantages of s3-lambda

  • Unmaintained project
    The repository appears to be no longer actively maintained, with limited recent commits and unresolved issues, which raises concerns about long-term reliability, security patches, and compatibility with newer AWS SDK versions.
  • Limited documentation
    The project's documentation is relatively sparse, lacking comprehensive examples, edge case handling guidance, and detailed API references, which can make it challenging for new users to adopt effectively.
  • AWS SDK version dependency
    The library depends on an older version of the AWS SDK for JavaScript, which may conflict with projects using the newer AWS SDK v3 and could miss out on performance improvements and features in updated SDKs.
  • Limited error handling flexibility
    The built-in error handling mechanisms are relatively basic, and handling partial failures or implementing sophisticated retry logic for individual object operations requires additional custom code from the developer.
  • Narrow scope of functionality
    The library is tightly focused on S3 object processing and does not integrate with other AWS services or provide utilities beyond basic map/filter/reduce operations, limiting its usefulness in more complex data pipeline scenarios.

Analysis of PDFTrackr

Overall verdict

  • PDFTrackr appears to be a solid, purpose-built tool for those who need to share PDF documents and track how recipients engage with them, offering useful analytics and security features in an easy-to-use package.

Why this product is good

  • Provides detailed document tracking and analytics, such as views, time spent, and page-by-page engagement
  • Allows secure sharing of PDFs with access controls like password protection and link expiration
  • Helps sales, marketing, and business teams understand recipient behavior to follow up more effectively
  • Typically offers a simple interface that requires no complicated setup or technical expertise
  • Can improve accountability and insight compared to sending plain email attachments

Recommended for

  • Sales teams who want to know when and how prospects engage with proposals or pitch decks
  • Marketers distributing whitepapers, brochures, or lead-generation content
  • Freelancers and consultants sending contracts or reports to clients
  • Businesses needing secure, controlled document sharing with expiring or password-protected links
  • Anyone wanting analytics on how their PDFs are viewed rather than sending untracked attachments

Analysis of s3-lambda

Overall verdict

  • s3-lambda is a useful Node.js library for performing operations like map, reduce, and filter directly on S3 objects using Lambda, making it good for developers who need efficient, serverless-based batch processing of S3 data without managing infrastructure. It is well suited for smaller to medium projects but may not be actively maintained for enterprise-scale needs.

Why this product is good

  • Simplifies common S3 batch operations (map, filter, reduce) with a clean, functional API
  • Leverages AWS Lambda for scalable, serverless parallel processing of S3 objects
  • Reduces boilerplate code for iterating over and transforming large numbers of S3 objects
  • Open-source and free to use, allowing customization for specific workflows
  • Integrates well with existing AWS infrastructure and Node.js applications

Recommended for

  • Developers building serverless data pipelines on AWS
  • Teams needing to process or transform large sets of S3 objects without provisioning servers
  • Node.js developers looking for a functional programming approach to S3 operations
  • Projects with batch processing needs that fit within Lambda's execution limits
  • Prototyping or small-to-medium scale ETL tasks involving S3 data

PDFTrackr videos

Tracking with Page-by-Page Analytics

s3-lambda videos

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Category Popularity

0-100% (relative to PDFTrackr and s3-lambda)
PDF Tools
100 100%
0% 0
Relational Databases
0 0%
100% 100
PDF
100 100%
0% 0
Data Dashboard
0 0%
100% 100

Questions & Answers

As answered by people managing PDFTrackr and s3-lambda.

Which are the primary technologies used for building your product?

PDFTrackr's answer

Next.js, TypeScript, PostgreSQL, React, Docker, DigitalOcean, Cloudflare

What makes your product unique?

PDFTrackr's answer

It's the only PDF tracker that shows you which views were real. Bots and email scanners are filtered out of your counts automatically, and the dashboard shows exactly what it removed. Then Signals tell you who came back and who's worth a follow-up, with a per-recipient verdict on whether a specific person read it, so you act on real buyers instead of inflated numbers.

Why should a person choose your product over its competitors?

PDFTrackr's answer

Most trackers count every open, including bots and email scanners that never read a word. PDFTrackr filters them out and shows its work, so the numbers are real. Then Signals do the analysis for you: who's genuinely engaged, who's worth a call now, plus a per-recipient verdict and real-time alerts with emailed Reading Reports. Full page-by-page analytics are free with a 12-month history and virus scanning, no credit card; Pro is $9/month or $84/year.

How would you describe the primary audience of your product?

PDFTrackr's answer

Sales and business-development teams, consultants, agencies, and founders raising on a pitch deck. Anyone who sends proposals, decks, and reports and needs to know who actually read them and when to follow up.

What's the story behind your product?

PDFTrackr's answer

Built to answer the question every sender has: did they actually read it, and when should I follow up? Instead of a vanity view counter that inflates numbers with bots, PDFTrackr filters out the noise and turns real reads into a shortlist of who's worth a call.

Who are some of the biggest customers of your product?

PDFTrackr's answer

  • Sales and business-development teams
  • Consultants
  • Agencies
  • Founders sharing pitch decks

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare PDFTrackr and s3-lambda

PDFTrackr Reviews

  1. julidovzhanytsia
    Finally something simple for tracking proposals

    I'm a photographer, been using this for 2 weeks after getting fed up with papermark. i just need to know if brides open my wedding packages, not run a fortune 500 data room lol. pdftrackr tells me what pages they look at which is super useful - noticed one client spent ages on my portfolio but skipped pricing, so i knew to focus on value not cost. the free plan is enough for me (i send maybe 15 proposals a month)

    Pros:    Literally took 2 mins to figure out|Shows what pages people actually read|Free 500mb

s3-lambda Reviews

We have no reviews of s3-lambda yet.
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What are some alternatives?

When comparing PDFTrackr and s3-lambda, you can also consider the following products

Papermark - Papermark is the open-source DocSend alternative with built-in analytics and custom domains.

PDFtoLink.io - Convert your PDF documents into shareable links instantly. Fast, secure, and reliable PDF to link conversion service.

Dropbox DocSend - Dropbox DocSend is a secure file and document sharing solution that gives users analytics and control of document in their critical workflows. Key features include sending documents as secure links, eSignature, and customizable virtual data rooms.

Doc2Link - Upload PDF & Share Online, 100% Free

PDFToLink.im - PDF To Link is a free online tool that quickly converts PDFs to shareable links with secure hosting, privacy settings, and works on all devices.

HelloPDF - Generating a PDF from a URL has never been easier