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MailStore VS Keylight.dev

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

MailStore

MailStore Home - A 100% free single-private-user desktop solution

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?
Tabidoo
A simple way to keep all your data under control. Build your own business applications in just 4 minutes. 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, Keylight.dev seems to be more popular. It has been mentioned 4 times since March 2021.

social mentions
0 vs 4
Email Management popularity
100% vs 0%
alternatives listed
166 vs 1

Base details

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

MailStore
Keylight.dev
Website mailstore.com 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
Email Management Email Archiving Email Security Email Productivity +1
Developer Tools Software Development License Management Productivity Tech Web App Tool +4

About MailStore and Keylight.dev

In their own words, as submitted to SaaSHub.

MailStore
Keylight.dev

No description of MailStore 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.

MailStore 5 features
Keylight.dev 16 features
  • Cost
    MailStore Home is free for personal use, making it an affordable option for individual email archiving and management.
  • Compatibility
    The software supports a wide range of mail protocols and email clients, including Outlook, Thunderbird, and various IMAP and POP3 accounts.
  • Search Functionality
    MailStore provides powerful full-text search capabilities, allowing users to quickly find emails stored in the archive.
  • Easy Backup and Restore
    The application makes it simple to back up and restore email archives, helping to protect against data loss.
  • Compliance
    Ensures emails are stored in a compliant manner, which is particularly beneficial for business users needing to adhere to legal and regulatory requirements.

Possible disadvantages

  • Limited to Windows
    MailStore Home is only available for Windows operating systems, which may not be suitable for users on macOS or Linux.
  • No Cloud Integration
    The software lacks direct integration with cloud storage solutions, which could be a drawback for users who prefer to store or back up emails in cloud environments.
  • Complex Initial Setup
    Initial configuration can be somewhat complex for less tech-savvy users, requiring a certain level of familiarity with email protocols and accounts.
  • Manual Updates
    Users are required to manually check for and install software updates, rather than having automatic updates.
  • Single User Limitation
    Designed for individual use rather than multi-user environments, which makes it less suitable for organizations looking to deploy it across multiple users or departments.
  • 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.

MailStore
Keylight.dev

Overall verdict

  • Overall, MailStore is a solid choice for businesses and individuals seeking a dependable and efficient email archiving solution. Its ease of use, scalability, and strong security measures make it a favorable option.

Why this product is good

  • MailStore is considered a good email archiving solution due to its robust feature set that includes comprehensive email storage, efficient search capabilities, and adaptability across various email platforms. It provides users with a reliable way to manage and retrieve vast volumes of email data while ensuring compliance with legal and business requirements.

Recommended for

    MailStore is recommended for small to medium-sized businesses, IT administrators, and individual users who need a reliable solution for archiving emails, ensuring compliance, and improving email management efficiency.

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.

MailStore 2 videos + Add
Keylight.dev 0 videos + Add

How To Archive Your Email Using MailStore Home

More videos

  • - Picks of the Week: MailStore Home

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
MailStore
Keylight.dev
100% 100%
Email Management
0% 0%
0% 0%
Web App
100% 100%
100% 100%
Email Archiving
0% 0%
0% 0%
Productivity
100% 100%

Questions & Answers

As answered by people managing MailStore 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 MailStore and Keylight.dev. For example, how are they different and which one is better?

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Reviews and articles

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

MailStore no reviews yet
Keylight.dev 5.0 · 1 review

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

Social recommendations and mentions

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

MailStore 0 mentions
Keylight.dev 4 mentions

Tracking MailStore since Mar 2021.

  • 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

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