Software Alternatives, Accelerators & Startups

Cubic VS DocSpring

Compare Cubic VS DocSpring and see what are their differences

Cubic logo Cubic

Cubic (Custom Ubuntu ISO Creator) is a GUI wizard to create a customized bootable Ubuntu Live CD...

DocSpring logo DocSpring

PDF filling API that makes it easy to fill out PDF forms and convert HTML to PDFs
  • Cubic Landing page
    Landing page //
    2023-09-13
  • DocSpring PDF Template Editor
    PDF Template Editor //
    2025-02-26
  • DocSpring HTML Template Preview
    HTML Template Preview //
    2025-02-26
  • DocSpring HTML Template Editor
    HTML Template Editor //
    2025-02-26
  • DocSpring Auto-generated Web Form
    Auto-generated Web Form //
    2025-02-26
  • DocSpring E-Signatures
    E-Signatures //
    2025-02-26
  • DocSpring View Submissions
    View Submissions //
    2025-02-26
  • DocSpring View API Request Logs
    View API Request Logs //
    2025-02-26
  • DocSpring Postman Collection
    Postman Collection //
    2025-02-26

We provide a PDF filling and generation API:

  • Upload your PDF to our visual template editor to set up form fields and data types
  • Post JSON to fill out existing PDF forms with data
  • Generate editable PDF forms, or overlay static data on top of fields
  • Create HTML/CSS templates with Liquid fields, then post JSON to generate PDFs
  • Use our merge API to combine multiple PDFs into a single document

PDF generation doesn't need to be complicated or take weeks of engineering time. Use our battle-tested service to start filling out PDFs in minutes.

Cubic

Pricing URL
-
$ Details
-
Release Date
-

DocSpring

$ Details
freemium $49.0 / Monthly (Starter - 50 PDFs / mo)
Release Date
2017 October
Startup details
Country
United States
State
Delaware
City
Newark
Founder(s)
Nathan Broadbent
Employees
1 - 9

Cubic features and specs

  • User-Friendly Interface
    Cubic provides a straightforward and intuitive interface, making it accessible even for users with limited experience in creating or customizing Linux ISOs.
  • Customizability
    Cubic allows users to easily customize Ubuntu-based distributions by installing software, tweaking settings, and adding files directly into the ISO image.
  • Real-time Preview
    The application provides a real-time preview of the ISO being customized, helping users to visualize the final product and make adjustments as necessary.
  • Enhanced Control Over Packages
    Cubic facilitates easy manipulation of package lists, including the ability to add, remove, or enable specific repositories for package installation.

Possible disadvantages of Cubic

  • Limited to Ubuntu-based Distributions
    Cubic is specifically designed for customizing Ubuntu and its derivatives, meaning it is not suitable for other Linux distributions.
  • Requires Linux Knowledge
    Despite its user-friendly interface, Cubic still requires a basic understanding of Linux commands and environment to make effective customizations.
  • Dependency on Ubuntu Packages
    Customizations are reliant on packages available within Ubuntuโ€™s repositories, which may limit the scope of modifications for users who require non-Ubuntu packages.
  • Performance and Resource Limitations
    Running Cubic can be resource-intensive, requiring significant CPU and memory usage, especially during intensive operations like large package installs or complex customization scripts.

DocSpring features and specs

  • Automated PDF Generation
    DocSpring allows users to automate the generation of PDFs by filling out templates with data. This can significantly reduce the time and effort needed to create documents.
  • API Integration
    DocSpring offers a robust API, which allows developers to integrate PDF generation into their own applications easily, enhancing productivity and workflow automation.
  • Flexible Templates
    The platform supports flexible and customizable templates, enabling businesses to maintain brand consistency while meeting specific document formatting requirements.
  • Secure Data Handling
    DocSpring is SOC 2 Type II compliant. We ensure data security through encryption and secure storage options, making it suitable for handling sensitive information.
  • Ease of Use
    The user interface is designed to be intuitive, making it easy for businesses to create and manage PDF templates without requiring extensive technical knowledge.

Cubic videos

Cubic Mini Cub Wood Stove Full Review | after two years

More videos:

  • Review - Cubic Mini Wood Stove // REVIEW
  • Review - 5 Cubic Foot Chest Freezer | Unboxing and Review | Buy on Amazon

DocSpring videos

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

Add video

Category Popularity

0-100% (relative to Cubic and DocSpring)
Developer Tools
100 100%
0% 0
PDF Tools
0 0%
100% 100
AI
100 100%
0% 0
Document Automation
0 0%
100% 100

Questions & Answers

As answered by people managing Cubic and DocSpring.

Which are the primary technologies used for building your product?

DocSpring's answer:

Ruby on Rails, React, AWS

What makes your product unique?

DocSpring's answer:

DocSpring is built specifically for developers who need reliable, secure PDF generation in production. We combine PDF form filling and HTML-to-PDF in a single API, with a visual template editor, typed fields, and validation to catch issues early. Our product has a lot of power features and is built to handle very advanced forms. Our infrastructure is SOC 2 Type II compliant, battle-tested, privacy focused, and optimized for high-volume workloads, so you can ship PDF features quickly and then stop thinking about them.

Why should a person choose your product over its competitors?

DocSpring's answer:

DocSpring is designed for teams who need a powerful tool with all the features you need for complex forms and business logic. DocSpring supports structured JSON, typed fields, and array iterations, and many other advanced features, so your templates stay aligned with your real data model. You get powerful validation, a visual editor, strong observability, and an API that fits into modern engineering workflows, so you spend less time fighting PDFs and more time shipping product.

How would you describe the primary audience of your product?

DocSpring's answer:

DocSpring is built for engineering and product teams who manage complex documents in production: things like financial applications, insurance forms, healthcare and legal documents, HR and payroll workflows, and government-style forms.

What's the story behind your product?

DocSpring's answer:

I used to work at a payroll company (Gusto). We had built a similar in-house tool for filling out tax forms. I then built the first version of DocSpring (formerly named FormAPI) while I was living in Thailand. I built it to automate the filling out of visa application and visa extension forms, but realized that it could also be used for tax forms, real estate contracts, and any other kind of fillable PDF form.

Who are some of the biggest customers of your product?

DocSpring's answer:

  • SaaS services serving customers in the real estate, insurance, finance, and legal industries, among many others.

User comments

Share your experience with using Cubic and DocSpring. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Cubic should be more popular than DocSpring. It has been mentiond 14 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Cubic mentions (14)

  • How to make your own distro?
    To remaster Ubuntu you can use Cubic which is easy to use if you have some basic Linux knowledge. Source: over 3 years ago
  • (Not So) Simple Plain Cubic Tutorial
    It has occurred to me that providing complex tutorials in regards to ISO's has somewhat discouraging effect, thus, in today's discussion, we'll delve into a tool named Cubic. Cubic, an anagram of "Custom Ubuntu ISO Creator", is a graphical wizard tool that can aid to create a customized Live ISO image for Ubuntu and Debian based distributions. - Source: dev.to / over 3 years ago
  • Rest in peace CutefishOS, you were amazing...
    In fact cutefish is based on ubuntu and the last version is based on ubuntu 21.10 it will probably be very easy to make a version of cutefish based on 22.04 you can probably even use the cubic iso tool to make it and package it. Source: about 4 years ago
  • The most efficient way to install Ubuntu on 40 Macbook Airs?
    We've looked into LiveCDCustomization, Cubic, Packer, and Unattended Ubuntu install cloud-init. Source: about 4 years ago
  • How can I build my own Distro?
    For Ubuntu I would go with Cubic, really easy to use and yet quite powerful. Source: about 4 years ago
View more

DocSpring mentions (5)

  • Ask HN: What Are You Working On? (February 2025)
    I'm still working on DocSpring [1], originally launched on Hacker News in October 2017 under the name "FormAPI." It's a PDF generation API with a template editor UI for setting up fields on PDF forms. It makes it easy to turn complex tax and immigration forms into simple type-safe APIs with strong validations. I've been having a lot of fun with AI agents lately. Have tried a lot of them - Cline, Roo Code,... - Source: Hacker News / over 1 year ago
  • Launch HN: Onedoc (YC W24) โ€“ A better way to create PDFs
    For programmatic filling of PDFs, have a look at DocSpring: https://docspring.com. - Source: Hacker News / over 2 years ago
  • So you want to modify the text of a PDF by hand
    Great post. I've spend a lot of time reading through the PDF specification over the last ~5 years while building DocSpring [1], and I still feel like I've barely scratched the surface. Qpdf is a great tool. One of my other favorites is RUPS [2], which really lets you dig into the structure of a PDF. [1] https://docspring.com [2] https://github.com/itext/i7j-rups. - Source: Hacker News / almost 3 years ago
  • Workflow for automating document creation from a "database"
    Hi /u/pepeday, Iโ€™m the founder of a software product that I built to solve this problem. The service is called DocSpring: https://docspring.com We provide a platform that you can use to set up PDF templates, and automatically generate PDFs by filling in those templates with data from your database. Please feel free to send me a message and Iโ€™d be happy to speak with you and help you figure out a solution. I can... Source: over 4 years ago
  • How do you fill copies of the same PDF certificates with Excel data?
    - https://docspring.com/ (super advanced features, a bit bloated). Source: almost 5 years ago

What are some alternatives?

When comparing Cubic and DocSpring, you can also consider the following products

CodeRabbit - Unleash AI on Your Code Reviews with CodeRabbit

DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more

Graphite - Graphite is a highly scalable real-time graphing system.

Doczilla - Effortlessly create stunning PDFs and screenshots. Seamlessly store them in your own AWS or Google Cloud Storage bucket, putting the control and creativity right at your fingertips.

Ellipsis - Ellipsis is an AI developer tool that can review code, fix bugs, and more.

wkhtmltopdf - wkhtmltopdf is an open source (LGPL) command line tools to render HTML into PDF and various image...