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Filelight VS Keylight.dev

Compare Filelight VS Keylight.dev and see what are their differences

F
Filelight

Filelight is an application to visualize the disk usage on your computer.

Rating
0 reviews
Alternatives Is it good?
Keylight.dev

The simplest way to license your app.

Rating
5.0 · 1 review
Pricing
Open source Freemium $19 / Monthly (Up to 2000 licenses active.)
Alternatives Is it good?
BusinessXray
Automated 60-second forensic business auditing pipeline powered by OpenAI Nano AI. Built for consultants and analysts. 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, Filelight should be more popular than Keylight.dev. It has been mentioned 11 times since March 2021.

social mentions
11 vs 4
Hard Disk Usage popularity
100% vs 0%
alternatives listed
63 vs 1

Base details

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

F
Filelight
Keylight.dev
Website apps.kde.org keylight.dev
Pricing —
Open source Freemium $19 / Monthly (Up to 2000 licenses active.) Official pricing
Platforms —
Web
Company — Startup from Belgium · 1 - 9 employees · 2026
Listed in
OS & Utilities Disk Analyzer Hard Disk Usage Hard Drive Tools +1
Developer Tools Software Development License Management Productivity Tech Web App Tool +4

About Filelight and Keylight.dev

In their own words, as submitted to SaaSHub.

F
Filelight
Keylight.dev

No description of Filelight yet.

Keylight sits between your payment provider and your app. Licenses, activations, customers, and usage all live here. Switch providers, or run several, without shipping a new build.

Read more about Keylight.dev

Features and specs

What each product offers, as listed by its team.

F
Filelight 5 features
Keylight.dev 16 features
  • Visual Representation
    Filelight provides a visual representation of disk usage using concentric rings, making it easy to identify large files and directories that are taking up space.
  • User-Friendly Interface
    The interface is intuitive and easy to navigate, allowing users to quickly understand their disk usage without steep learning curves.
  • Cross-Platform Compatibility
    Being part of the KDE suite, Filelight is available on various platforms including Linux, Windows, and macOS.
  • Open Source
    Filelight is open source, allowing users to study, modify, and distribute the software according to their needs.
  • Integration with KDE
    Filelight integrates well with other KDE applications, providing a seamless user experience for those using KDE Desktop Environment.

Possible disadvantages

  • Limited Functionality
    Compared to some other disk usage analyzers, Filelight has limited features and may not have advanced options like automatic cleanup tools.
  • Performance on Large Filesystems
    Some users report performance issues when scanning very large filesystems, as the visualization can take significant time to generate.
  • Dependency on KDE Libraries
    Filelight requires KDE libraries to be installed, which might be cumbersome for users not using the KDE desktop environment.
  • No Real-time Monitoring
    Filelight does not provide real-time disk usage monitoring, which can be a downside for users needing continuous tracking.
  • License Management
    Create, validate, revoke, and manage software licenses from one dashboard.
  • Device Activations
    Limit how many devices can use a license and manage individual activations.
  • Offline Access
    Keep apps working securely without a constant internet connection using signed offline leases.
  • License States
    Handle trial, free, paid, expired, limited, and grace-period access through one consistent state.
  • Payment Provider Integrations
    Connect Stripe, Paddle, Lemon Squeezy, Polar, Gumroad, and other payment platforms.
  • Provider Independence
    Change payment providers or use multiple providers without rebuilding your app’s licensing system.
  • Swift SDK Integration
    Add licensing to macOS and iOS apps using a native Swift package.
  • Secure License Validation
    Protect license data with cryptographic signatures and tamper-resistant validation.
  • Trials and Free Tiers
    Configure trials, free plans, fallbacks, and upgrade paths without building custom logic.
  • Customer Dashboard
    View licenses, customers, devices, activations, plans, and access status in one place.
  • License Analytics
    Track activations, active licenses, usage, and customer activity.
  • Key Rotation
    Rotate SDK signing keys without breaking older application versions.
  • Webhook Synchronization
    Convert payment, renewal, refund, cancellation, and subscription events into license updates.
  • Device-Bound Storage
    Store license data securely on the customer’s device without unnecessary Keychain prompts.
  • REST API
    Connect custom backends, checkout systems, and internal tools to Keylight.
  • Agentic Orchestration
    CLI usable by AI Agents to run the whole setup and more.

Analysis

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

F
Filelight
Keylight.dev

Overall verdict

  • Yes, Filelight is generally considered a good tool for users who want to analyze disk usage effectively and visually. It is user-friendly, efficient, and provides detailed insights into how space is being used on a drive, which is particularly useful for users looking to manage their storage more effectively.

Why this product is good

  • Filelight is a disk space analyzer that provides a visual representation of disk usage. It is appreciated for its intuitive interface and interactive sunburst chart that makes understanding disk space distribution easier. It integrates well with the KDE environment and supports a wide variety of file systems, making it a versatile tool for users who need to quickly identify large files or directories that consume a lot of space.

Recommended for

    Filelight is recommended for users who prefer graphical representation of disk usage and are comfortable in the KDE desktop environment. It is also suitable for users who need to manage disk space across different file systems and those who want an easy way to identify space-consuming files and directories.

Overall verdict

  • I don't have verified, up-to-date information about Keylight.dev specifically, so I can't confirm its quality, features, or reliability. It may be a newer or niche tool that isn't well-documented in my training data. I'd recommend checking recent user reviews, the official website's documentation, and community forums (like GitHub, Reddit, or Twitter) for firsthand feedback before making a decision.

Why this product is good

  • Unable to verify specific features, pricing, or performance claims for this product
  • No confirmed user reviews or independent testing data available
  • Cannot confirm company legitimacy, support quality, or security practices without direct verification

Recommended for

  • Users willing to conduct their own due diligence by visiting the official site directly
  • Developers who can test the product via a free trial or demo before committing
  • Anyone who checks third-party review sites, GitHub issues, or community discussions for real user experiences

Videos

Walkthroughs and reviews on video.

F
Filelight 2 videos + Add
Keylight.dev 0 videos + Add

Filelight : Shows where your diskspace is being used in Linux Mint (Ubuntu)

More videos

  • - Plasma 5.18: Installing apps from Dolphin Menus (Filelight app)

No Keylight.dev 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
F
Filelight
Keylight.dev
100% 100%
Hard Disk Usage
0% 0%
0% 0%
Tool
100% 100%
100% 100%
Disk Analyzer
0% 0%
0% 0%
Productivity
100% 100%

Questions & Answers

As answered by people managing Filelight and Keylight.dev.

What makes your product unique?

Keylight.dev's answer:

Keylight keeps app licensing separate from payments. You can use Stripe, Paddle, Lemon Squeezy, Polar, Gumroad, or your own checkout without tying your app to one provider.

It handles license keys, device activations, trials, free tiers, offline access, grace periods, and signed license state through one SDK.

Why should a person choose your product over its competitors?

Keylight.dev's answer:

My goal is to make all apps work with Keylight. So all of your licenses, from any types of apps, is going through Keylight for analytics, customer portal, support, ...

Most licensing tools are bundled into a payment provider. Keylight is built as an independent licensing layer.

That means you can change payment providers, sell through multiple platforms, or change your pricing model without rebuilding licensing inside your app.

It also gives developers a ready-made SDK and dashboard instead of requiring them to build and maintain their own licensing backend.

How would you describe the primary audience of your product?

Keylight.dev's answer:

Keylight is primarily built for independent developers and software companies selling apps directly to customers.

Its main audience includes:

macOS and iOS developers Web app and SaaS developers Developers selling outside app stores Teams migrating from a payment provider’s built-in licensing Developers who need trials, device limits, offline access, and license analytics

What's the story behind your product?

Keylight.dev's answer:

Keylight started because I kept rebuilding the same licensing systems for different apps: license keys, trials, activations, offline access, device changes, and all the edge cases that come with them.

I also did not want licensing to be controlled by whichever payment provider an app happened to use.

So I built Keylight as a standalone layer between the app and the payment provider. Payment platforms send events to Keylight, and the app receives one consistent license state through the SDK.

Who are some of the biggest customers of your product?

Keylight.dev's answer:

That's confidential.

Which are the primary technologies used for building your product?

Keylight.dev's answer:

Swift and Swift Package Manager for the Apple SDK Rust SDK / JS SDK / C# SDK / C++ SDK TypeScript React Next.js Stripe Connect and payment-provider webhooks Cryptographic signatures for secure, offline-capable licenses REST APIs for application and provider integrations

User comments

Share your experience with using Filelight and Keylight.dev. For example, how are they different and which one is better?

Log in or Post with

Reviews and articles

External articles and on-site reviews we used to compare the two products.

F
Filelight no reviews yet
Keylight.dev 5.0 · 1 review

We have no reviews of Filelight yet. Be the first one to post

Social recommendations and mentions

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

F
Filelight 11 mentions
Keylight.dev 4 mentions
  • WinDirStat – Windows Directory Statistics
    Many good alternative listed already. But I have quite liked FileLight which is cross platform https://apps.kde.org/filelight/ Likely not as fast as WizTree though. - Source: Hacker News / over 2 years ago
  • Where to check wheres everything installed?
    You’ll need to boot into Desktop Mode to drill deeper regarding what’s installed on your SD card or internal storage. In Desktop Mode, you can navigate around using the built-in file explorer, Dolphin. You can also download and install... Source: over 3 years ago
  • This doesn’t seem normal?
    I would open the Discover store in Desktop mode and download Filelight, which will help visualize the used space on your drive. It might help illuminate what’s taking up so much space, pun intended. Source: over 3 years ago

View more

  • How offline license activation actually works
    You don't want to hand-roll Ed25519 and lease parsing. Most licensing SDKs hide this behind a couple of calls. With Keylight, for example, the offline path collapses to: activate once, then a local checkOnLaunch() that verifies the lease... - Source: dev.to / 3 months ago
  • I compared the licensing tools for my indie Mac app — the honest breakdown
    Full disclosure: I now build Keylight, so weigh this accordingly — I'm telling you the seam it's designed for, not that it wins every row. - Source: dev.to / 3 months ago
  • How to add license keys to a SwiftUI macOS app (in under an hour)
    Full docs and the free tier are at keylight.dev. If you're on Tauri or Electron instead of native Swift, the same SDK pattern exists in JS/Rust. - Source: dev.to / 3 months ago

View more

Alternatives to Filelight and Keylight.dev

When comparing Filelight and Keylight.dev, you can also consider the following products.

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