You sold a plugin through WooCommerce, and a week later the customer writes: "The key doesn't work." You don't know if they activated it or not, and how many times. Manual correspondence begins. Ten such emails a month, you lose an evening. A hundred, you lose a weekend.

Standard WooCommerce doesn't generate license keys, doesn't verify activations and doesn't revoke access. To sell software, themes or SaaS access you need a separate license manager. It handles the "purchased → received key → activated → updated" cycle, leaving you with only product development.

We tested 4 license manager plugins that cover this cycle completely: from a free solution with REST API to professional tools with bulk import of thousands of keys and database encryption.

💡 Quick overview:

• Compare 4 plugins using the table and choose one for your scenario
• Install the plugin and set up automatic key generation for digital products
• Configure REST API to verify licenses from your software
• Track activations and manage keys directly from the WooCommerce admin

Plugin comparison table

1. Software Add-on

Official WooCommerce extension from Kestrel. Not a third-party plugin, but a native solution that integrates license management directly into the order screen. Key generation, activation management and selling updates happen in the same place where you process orders.

The plugin creates a unique key when payment completes and sends it in the confirmation email along with activation limits. For the buyer it's a regular purchase: the key arrives instantly, no additional actions needed. The built-in paid updates system lets old customers get a discount on upgrades, you set the list of eligible keys and the price, the plugin calculates automatically.

REST API supports generation, activation, deactivation and verification of keys. Sales and activation reports are available in WooCommerce → Reports → Software. In practice it's enough for stores with one or two software products, where you don't need bulk operations with thousands of keys.

Pros:

• Native WooCommerce integration: all license operations inside the store admin
• Built-in paid updates system with discounts for old customers
• REST API for checking, activating and deactivating licenses from your application
• Technical support from Kestrel with 30-day money-back guarantee

Cons:

• $179/year, the most expensive solution in the list
• 3.3/5 rating on WooCommerce Marketplace, only 4 reviews
• Subscription support is only partial, through third-party add-ons

💵 Price: $179 per year (1-year plan) or $286.40 for 2 years with 20% discount WooCommerce marketplace. Includes updates and support.

🔗 Software Add-on on WooCommerce.com

2. WC Serial Numbers Pro

Market veteran from PluginEver with active development. The free version lives on WordPress.org (v2.3.4, updated May 2026), and Pro adds bulk import of up to 50,000 keys via CSV, background processes without timeouts and AES-256 database encryption.

If you sell multiple license types, Personal, Developer, Agency, each product variation gets its own key pool, activation limits and expiration dates. A customer upgrades from Personal to Agency: the plugin deactivates the old key, issues a new one and notifies the buyer. All automatically.

The Pro version is optimized for scale: Twilio SMS for key delivery, QR codes, custom generators with prefixes and patterns. The free version provides manual key adding, email delivery, basic API-form verification. For a start it's enough, Pro is chosen when keys exceed a couple hundred per month.

Pros:

• Bulk import: 10,000 keys load without timeouts
• AES-256 encryption of all keys in the database
• Deep integration with WooCommerce Subscriptions: license term and subscription status synchronization
• SMS delivery via Twilio and QR codes in Pro
• Free version on WordPress.org

Cons:

• Learning curve is steeper than Software Add-on
• Pro price for one site: $99/year is noticeable for small stores
• Some features (QR codes, SMS, duplicate keys) only in higher tiers

💵 Price: Personal $99/year (1 site), Developer $249/year (5 sites), Agency $499/year (unlimited). Lifetime plans from $399 PluginEver price list.

🔗 WC Serial Numbers (free version) | 🔗 WC Serial Numbers Pro

3. License Manager for WooCommerce

The most popular free option: 6,000+ active installs on WordPress.org, v3.0.17, updated May 2026. Unlike its predecessor Digital License Manager (abandoned), this plugin from Saad Iqbal is alive and regularly receives patches.

The basic version already includes automatic key generation, REST API with endpoints for verification, activation and deactivation, data encryption and custom generators with prefixes, length and patterns. Migration from the old Digital License Manager, in one click.

The Pro version adds Webhooks, QR codes for activation, license renewal on recurring payments and ping requests to check client-server connection. If you're just starting to sell software and the budget is minimal, this is the first candidate.

Note: the plugin creates two cryptographic files in wp-content/uploads/lmfwc-files/ (defuse.txt and secret.txt). They're needed to decrypt keys in the database. Lose them, and you won't recover the keys. Back them up immediately after installation.

Pros:

• Free version with full REST API and encryption
• Migration from Digital License Manager in one click
• Key generators with customizable formats (prefix, length, pattern)
• License certificates with company logo

Cons:

• Pro: $129/year for one site, more expensive than alternatives WPExperts data
• WooCommerce Subscriptions integration only in Pro
• Support through WordPress.org forum, not always responsive

💵 Price: Free version on WordPress.org. Pro: from $129/year (1 site) WPExperts pricing.

🔗 License Manager for WooCommerce (Free)

4. WooCommerce License Manager

Plugin from Firas Saidi on CodeCanyon. The only solution in the list with one-time payment: $59 gives lifetime license and 6 months of support view on CodeCanyon. No annual renewals.

Key feature, delivering keys as images. You upload an image (like a Steam top-up card or gift certificate), and the buyer receives exactly that. For stores selling game keys, vouchers and payment cards this is indispensable. Inventory synchronization with WooCommerce prevents overselling, and backorder support lets you sell keys that aren't in stock yet.

The plugin is compatible with Product Bundles for selling bundles and can import/export keys via CSV and TXT. The interface is simpler than competitors, but for stores that only need key generation and delivery without subscriptions and complex logic, this is a plus: install and forget.

Pros:

• One-time payment $59, no annual charges CodeCanyon listing
• Delivering keys as images (top-up cards, gift certificates)
• Compatibility with Product Bundles for selling bundles
• Import and export keys via CSV and TXT

Cons:

• No built-in WooCommerce Subscriptions support
• Interface looks outdated compared to competitors
• Support through CodeCanyon, updates not guaranteed after 6 months

💵 Price: $59 one-time (6 months support, lifetime updates) CodeCanyon page.

🔗 WooCommerce License Manager on CodeCanyon | 🔗 Live demo

Video: setting up WooCommerce license manager

Watch step-by-step setup of License Manager for WooCommerce on a real site, from plugin installation to automatic key delivery to the buyer:

⁉️🤔 Frequently asked questions

Do I need a license manager if I sell 5-10 digital products per month?

If the product requires activation and license verification on every launch, yes. Manual key issuing takes 5-10 minutes per order, and the customer waits. At 50 orders per month that's 4-8 hours of routine. Free License Manager for WooCommerce will cover the needs without budget.

What's the difference between REST API and simple key generation?

Generation creates a unique code on purchase. REST API lets your software, plugin, theme, application, verify this key on the fly: is it valid, how many activations remain, has it expired. Without API you won't build license verification inside the product: the customer gets the key, but the software won't know if it's paid or not.

Can I use two license manager plugins simultaneously?

Technically yes, but not recommended. Two plugins conflict over WooCommerce hooks (order completed, email templates) and create duplicate keys. Choose one and configure it for all product types.

What to do with keys from returned orders?

All plugins in the list allow revoking or reusing a key. WC Serial Numbers Pro does this automatically on refund. In others, manual operation in a couple of clicks: the key returns to the available pool and is issued to the next buyer.

Which plugin to choose if budget is limited?

Get the free License Manager for WooCommerce from WordPress.org. 6,000+ active installs, REST API out of the box, key encryption and migration from old Digital License Manager. When volumes grow, Pro will add Webhooks and QR codes, and WC Serial Numbers Pro will cover scenarios with thousands of keys.

Which license manager plugin to choose in 2026

The choice comes down to three factors: budget, scale and technical API requirements.

If you sell one or two software products and need native WooCommerce integration without extra settings, Software Add-on. Yes, $179/year is more expensive than competitors WooCommerce pricing, but it's an official extension with Kestrel support and seamless work inside the admin. Paid updates and activation reporting already in the box.

If you process hundreds and thousands of keys monthly, sell multiple license types and want to forget about manual management, WC Serial Numbers Pro. Bulk import, AES-256 and deep integration with WooCommerce Subscriptions justify $99/year PluginEver pricing. And if you start small, the free version on WordPress.org will give time to ramp up.

If budget is minimal or you're just starting, License Manager for WooCommerce. 6,000+ installs don't lie: REST API, encryption, custom generators. Outgrow it, upgrade to Pro or migration to Serial Numbers Pro will pass without data loss.

WooCommerce License Manager from CodeCanyon, the choice for those who don't want annual payments. $59 once, and license management is closed CodeCanyon price. Perfect for stores selling game keys and vouchers, where delivering the key as an image solves the task entirely.

Check that the chosen plugin handles your scenario on a test site before launching in production. Half an hour of testing will save days of support later.