If you’re searching for a WooCommerce side cart plugin and comparing Caddy vs Addonify Floating Cart, you’re likely weighing two of the more popular free options on WordPress.org. Both promise a smooth Ajax cart experience without forcing customers to leave the page. But one of these plugins has a critical limitation that could leave your store stuck in the past, while the other is built for where WordPress is heading.
Here’s the full breakdown.
TL;DR
Caddy is the better choice for most WooCommerce stores. It works with both block themes and classic themes, includes features Addonify does not offer at all (product recommendations, save for later, rewards meter), and is actively maintained. Addonify Floating Cart is a generous free plugin, but it does not work with WordPress block themes, has no premium upgrade path, and shows signs of stalled development.
Best for:
- Caddy: Store owners who want a future-proof side cart with product recommendations, save for later, and full block theme support, plus a clear upgrade path to analytics and automation when they’re ready.
- Addonify Floating Cart: Store owners running a classic theme with no plans to switch, who need a simple free cart with coupon support and a shipping calculator built in.
Overview
Caddy is a smart side cart plugin for WooCommerce built by Tribe Interactive. With 4,000+ active installs and a ground-up 3.0 rebuild, Caddy is designed around the WordPress Interactivity API and WooCommerce Store API, the same modern foundations that WooCommerce itself is moving toward. The free version includes a genuinely rich feature set, and the Pro tier adds analytics, automation, and abandoned cart tracking for stores ready to optimize revenue.
Addonify Floating Cart is a free, open-source side cart plugin with 1,000+ active installs and a 4.7-star rating. It offers a solid set of cart features including coupon support, a shipping calculator, and a shopping meter, all for free. However, it has no premium version, does not support WordPress block themes, and its support forum shows unanswered questions.
Both plugins solve the same core problem: replacing the default WooCommerce cart page with a faster, in-page sliding cart. The question is which one will keep working as your store grows and WordPress evolves.
Feature Comparison
| Feature | Caddy (Free) | Addonify Floating Cart |
|---|---|---|
| Ajax Side Cart | Yes | Yes |
| Quantity Management | Yes | Yes |
| Coupon Application in Cart | Yes | Yes |
| Free Shipping Meter | Yes | Yes (shopping meter) |
| Shipping Calculator | No | Yes |
| Tax Calculation Display | No | Yes |
| Product Recommendations | Yes | No |
| Save for Later | Yes | No |
| Rewards Meter | Yes | No |
| Announcement Bar | Yes | No |
| Cart Bubble Icon | Yes | Yes |
| Menu Widgets / Shortcodes | Yes | No |
| Custom CSS | Yes | Yes (custom colors/typography) |
| Toast Notifications | No | Yes |
| Undo Product Removal | No | Yes |
| Import/Export Settings | No | Yes |
| HPOS Compatible | Yes | Not confirmed |
| Block Theme Support | Yes | No |
| Classic Theme Support | Yes | Yes |
| WooCommerce Blocks Compatible | Yes | No |
| Pro Upgrade Available | Yes ($99/yr+) | No |
| Analytics Dashboard | Pro | No |
| Abandoned Cart Tracking | Pro | No |
| Workflow Automation | Pro | No |
| Free Gifts / Offers | Pro | No |
| Advanced Display Rules | Pro | No |
A few things stand out. Addonify includes a shipping calculator and tax display in the cart for free, which is genuinely useful. It also offers toast notifications and undo-on-removal, nice quality-of-life touches. Credit where it’s due. For a completely free plugin, the feature list is respectable.
But Caddy’s free tier includes features that directly impact revenue: product recommendations that drive upsells, save for later that recovers abandoned interest, and a rewards meter that incentivizes larger orders. These are the kinds of features most competing plugins lock behind a paywall.
The Block Theme Problem
This is the section that matters most, and it’s the reason many Addonify users are looking for alternatives right now.
Addonify Floating Cart does not work with WordPress block themes. It requires a classic theme or a classic template structure to function. If your store uses any Full Site Editing (FSE) block theme (Twenty Twenty-Four, Twenty Twenty-Five, or any of the growing number of block-first themes on WordPress.org), Addonify will not work.
This isn’t a minor inconvenience. WordPress has been moving toward block-based architecture since the introduction of the Site Editor in WordPress 5.9. WooCommerce itself has been rebuilding its core pages around blocks. The Cart block, Checkout block, and product display blocks are all part of WooCommerce’s roadmap. Block themes are not the future. They are the present.
If you install Addonify on a block theme today, the cart simply will not appear. And if you’re currently on a classic theme but plan to update your design in the next year or two, you’ll likely be migrating to a block-based theme. At that point, Addonify breaks.
Caddy works with both. Version 3.0 is built on the WordPress Interactivity API and WooCommerce Store API, which means it integrates natively with both block themes and classic themes. Whether you’re running GeneratePress, Astra, Flatsome, Storefront, Kadence, or a block-first FSE theme, Caddy works the same way.
This is not a theoretical advantage. It’s the practical reason Addonify users are searching for alternatives right now.
Feature Deep Dive
Product Recommendations
Caddy displays product recommendations directly inside the side cart, while the customer is actively in a buying mindset. This is one of the highest-converting placements for cross-sells and upsells because the customer has already committed to a purchase. Addonify has no recommendation engine at all.
Save for Later
Caddy lets customers move items from their cart to a saved list without leaving the side cart. This reduces cart abandonment by giving shoppers a middle option between “buy now” and “remove forever.” Products stay visible, and customers can move them back to the cart with a single click. Addonify does offer an undo-on-removal feature via toast notifications, but once the notification disappears, the product is gone.
Rewards Meter
Caddy’s rewards meter shows customers how close they are to unlocking a reward (free shipping, a discount, a free gift with Pro). This gamification element is proven to increase average order value. Addonify’s shopping meter tracks progress toward a single threshold but doesn’t tie into a reward system.
Coupons
Both plugins let customers apply coupons directly in the side cart without navigating away. This is table stakes for a modern cart experience, and both handle it well.
Shipping Calculator vs. Free Shipping Meter
Addonify includes a full shipping calculator in the cart, showing calculated rates and tax. This is a genuinely useful feature for stores with complex shipping. Caddy focuses on the free shipping meter, which shows progress toward a free shipping threshold. Different approaches. The free shipping meter is better for driving higher AOV, while the shipping calculator is better for transparency on rates.
Analytics and Automation (Caddy Pro)
Caddy Pro adds a layer that Addonify simply cannot match because there is no paid tier. The analytics dashboard tracks cart revenue, conversion rates, and abandonment. Workflow automation lets you create rules like “if cart is over $100, show free gift offer” or “if customer hasn’t checked out in 30 minutes, trigger recovery email.” These features turn the side cart from a UI element into a revenue optimization tool.
Performance and Architecture
Caddy 3.0 is built on the WordPress Interactivity API, a framework introduced in WordPress 6.5 that provides reactive, server-rendered interactivity without heavy JavaScript frameworks. Cart operations use the WooCommerce Store API, the same REST API that powers WooCommerce’s own cart and checkout blocks. This means Caddy works with WooCommerce’s native data layer rather than building a parallel system. The result is better compatibility, fewer conflicts, and alignment with where WooCommerce is headed. Caddy also supports High-Performance Order Storage (HPOS), WooCommerce’s modern database architecture.
Addonify uses Vue.js for its admin panel and vanilla JavaScript for the frontend, with SCSS for styling. This is a reasonable technical approach, but it sits outside WooCommerce’s native architecture. The frontend JavaScript handles cart operations independently, which is why it doesn’t integrate with WooCommerce’s block-based components. The plugin is open source on GitHub, which is appreciated for transparency, but the codebase has not seen meaningful feature development in some time.
Both plugins use Ajax for cart operations, so neither requires a full page reload. In terms of raw performance, both are lightweight enough that they won’t noticeably slow down your store.
Support and Maintenance
This is where the picture gets concerning for Addonify.
Caddy is actively maintained by Tribe Interactive. Version 3.0 represents a ground-up rebuild on modern WordPress architecture. Support is handled directly, and the plugin follows a regular release cycle. The development team is small but responsive. If you hit an issue, you’ll get a real answer.
Addonify Floating Cart development appears to have slowed. While the codebase has received occasional security fixes, the plugin’s WordPress.org support forum tells a different story. Multiple support threads have gone unanswered. Users have posted questions asking whether the plugin is abandoned. Bug reports, including a known issue where shipping method selections don’t persist to checkout and toast notifications breaking with certain themes, remain unresolved.
There is no premium version of Addonify, which means there is no revenue model to fund ongoing development. Open-source generosity is admirable, but a plugin with no revenue is a plugin that depends entirely on volunteer goodwill. When that goodwill slows down, so does the plugin. The pattern of unanswered support requests suggests this is already happening.
For a side cart plugin, something that touches every single transaction on your store, long-term maintenance matters. A bug in your cart affects every order.
Pricing
| Plan | Caddy | Addonify Floating Cart |
|---|---|---|
| Free | Full-featured (recommendations, save for later, rewards meter, free shipping meter, coupons, announcement bar, cart bubble, custom CSS, HPOS support, block theme + classic theme support) | Full-featured (Ajax cart, coupons, shipping calculator, tax display, shopping meter, toast notifications, custom colors/typography, GDPR compliant) |
| 1 Site | $99/year (Pro: analytics, automation, free gifts, abandoned cart tracking, advanced display rules) | N/A |
| 5 Sites | $199/year | N/A |
| Unlimited Sites | $399/year | N/A |
| Money-Back Guarantee | 14 days | N/A |
Addonify is 100% free, and that deserves acknowledgment. If your only criterion is “spend nothing,” Addonify delivers a real plugin for zero dollars. There is no premium upsell, no nag screen, no feature gating.
But Caddy’s free version is also genuinely free and genuinely full-featured. The Pro upgrade adds analytics and automation, tools for stores that are ready to actively optimize cart performance. You’re not paying to unlock basic functionality. You’re paying for data and intelligence on top of an already complete cart experience.
Use Case Fit
Choose Caddy if:
- You’re running a block theme or plan to migrate to one in the future
- You want product recommendations in the cart to drive upsells
- You want save for later to reduce abandonment
- You need a plugin that’s actively maintained on modern WordPress architecture
- You want the option to upgrade to analytics and automation later
- You’re using WooCommerce Subscriptions, Product Bundles, or other extensions that need broad compatibility
- You’re building on Elementor, Divi, GeneratePress, Flatsome, Astra, Kadence, or any other major theme
Choose Addonify Floating Cart if:
- You’re on a classic theme and have no plans to change
- You specifically need a shipping calculator inside the side cart
- You want an open-source plugin you can fork and modify
- You need a simple cart solution and will never need analytics, recommendations, or automation
- You’re comfortable with limited support and slower update cycles
Final Verdict
Addonify Floating Cart earned its 4.7-star rating by doing something rare: shipping a genuinely useful free plugin with no premium upsell. Coupon support, a shipping calculator, a shopping meter, custom styling, all free. That generosity deserves respect, and for stores running classic themes with simple needs, it works.
But WordPress is moving forward. Block themes are the standard. WooCommerce is rebuilding around blocks and the Store API. A side cart plugin that cannot work with block themes is a plugin with an expiration date. And the signs of stalled development (unanswered support threads, unresolved bugs, infrequent updates) suggest that Addonify may not adapt.
Caddy 3.0 is built on the architecture WordPress and WooCommerce are moving toward. Its free version matches or exceeds Addonify’s feature set in the areas that drive revenue (recommendations, save for later, rewards). It works with every theme type. And for stores ready to go further, the Pro tier adds the analytics and automation tools that turn a side cart into a growth engine.
If you’re currently using Addonify and it’s working for you, there’s no emergency. But if you’re choosing a side cart plugin today, or if you’re planning a theme update in the next year, Caddy is the safer and more capable choice.
Try Caddy Free
Caddy’s free version is available on WordPress.org right now. It includes everything Addonify offers (Ajax cart, coupons, free shipping meter), plus product recommendations, save for later, a rewards meter, and full block theme support.
Download Caddy Free on WordPress.org and see the difference in your store today.
When you’re ready to unlock analytics, automation, and abandoned cart tracking, explore Caddy Pro starting at $99/year with a 14-day money-back guarantee.
