
Archive.org
Z-Lib
Standard Ebooks
ManyBooks.net
PDF Magazine Download
WorldMags
Open Library
Gutenberg Books is free to use Android, and iOS app with more than 50,000 titles from classic to top hits and features all the important books ever published in history.

Attributer
WhatConverts
Attribution
ConversionTracking.com
LeadSources.io
Automatically capture lead source and sync attribution data to your CRM and marketing tools to see what’s driving conversions and revenue.

Which is more popular?
Based on our record, Gutenberg Books seems to be more popular. It has been mentioned 133 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | gutenberg.org | sourceloop.ai |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from India · 1 - 9 employees · 2024 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Gutenberg Books yet.
SourceLoop gives you complete visibility into where your leads and customers come from. It automatically captures and organizes source, channel, and campaign data for every lead generated through forms, chats, or meetings. See the full journey behind each conversion, from first touch to last...
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Gutenberg Books and SourceLoop.
SourceLoop's answer:
SourceLoop connects marketing data directly to leads, not just website traffic. It captures complete lead journeys—from first click to conversion—so teams can see which campaigns truly drive results. Unlike traditional analytics tools, SourceLoop turns attribution data into actionable insights right inside your CRM.
SourceLoop's answer:
Most attribution tools stop at visitor tracking. SourceLoop goes further by linking each lead’s source, channel, and campaign to actual sales outcomes. It’s simple to install, works with any form or CRM, and includes built-in dashboards and lead management—so you get full visibility without complex setup or extra tools.
SourceLoop's answer:
SourceLoop is built for marketers, sales teams, and agencies who need to understand where their leads come from and which efforts generate the best ROI. It’s ideal for businesses that rely on online forms, chats, or meetings to capture new customers.
SourceLoop's answer:
SourceLoop was created to solve a common problem: businesses were generating leads but had no idea which marketing efforts were driving them. Our team set out to build a simple, powerful tool that connects lead data, marketing attribution, and CRM insights—so every business can track, analyze, and grow with confidence.
SourceLoop's answer:
SourceLoop is built using React, Node.js, and PostgreSQL, with server-side tracking and REST APIs for reliable data capture and integration. The system is optimized for scalability, accuracy, and real-time analytics.
SourceLoop's answer:
SourceLoop is trusted by digital marketing agencies, SaaS companies, and service-based businesses across multiple industries. Our early adopters include fast-growing startups and marketing teams that need accurate attribution to guide smarter ad spend and sales strategy.
Share your experience with using Gutenberg Books and SourceLoop. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


From Italy, https://www.gutenberg.org/ gives a 404 error and https://gutenberg.org/ opens a very official-looking page stating "police notice. This site is under judicial seizure" and references a sentence number: "criminal proceedings... - Source: Hacker News / 5 months ago
I got a kindle Scribe which can load PDF, HTML and text files via iPhone Kindle App and read offline. Since most pre-1925 books are out of copyright and free on https://gutenberg.org, ACM is open access (https://dl.acm.org/) and we have... - Source: Hacker News / 8 months ago
If you are willing to relinquish copyright claims on your work, for example by including a copyleft statement in the book’s preface, an organization like Project Gutenberg may be willing to host it, ostensibly in perpetuity. Other... - Source: Hacker News / almost 2 years ago
Tracking SourceLoop since Nov 2025.
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ZLibraryPart of Z-Library project. The world's largest ebook library.
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See What Marketing Converts. One place to Track, Manage and Report Leads. Track conversions and leads from Phone Calls, Web Forms and Chats.
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Online library of downloadable e-books that focuses on quality and modern standards in typography.
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Attribution provides multi-touch attribution with ROI tracking for company's marketing channels.
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