Ask ten WordPress developers which translation plugin to use and you will hear the same two names: WPML and Polylang. Both have been around for more than a decade, both power hundreds of thousands of multilingual sites, and both will get your content translated. But treating them as interchangeable misses what actually separates them. Choosing between WPML and Polylang is less a feature comparison than a choice between two pricing philosophies, two translation workflows, and two answers to the question of what happens when you stop paying.
This comparison covers what each plugin genuinely does well, where each one hurts, the deciding factors that should drive the choice, and a third option worth knowing about before you commit to an annual subscription.
What WPML Gets Right (and What It Costs)
WPML is the most established name in WordPress translation, and its biggest asset is exactly that: establishment. Theme and plugin authors have been testing against WPML for years, which means compatibility questions that plague smaller translation plugins rarely come up. If a commercial theme advertises "translation ready," WPML is almost always the plugin it was tested with.
The workflow is built around translation management. WPML ships its own translation editor, supports assigning translation jobs to specific users, and can connect to professional translation services directly from the WordPress admin. For agencies coordinating translators across large content libraries, this management layer is the product. Elementor support is native, and integrations with Yoast SEO and Rank Math are maintained by the WPML team itself.
The costs come in two forms. The first is literal: WPML has no free version. Pricing starts at €39 per year for the Blog tier, which covers a single production site and excludes key features like translation management and WooCommerce support, and runs to €199 per year for the Agency tier with unlimited sites. These are subscriptions with annual renewal. Stop paying and you keep the plugin running, but you lose updates and support, which on a WordPress site is not a long-term position anyone should be comfortable with.
The second cost is the automatic translation model. WPML's machine translation (DeepL, Google Translate, Microsoft, and its own WPML AI) runs on a credit system. You buy credits, or receive a monthly allowance on higher tiers, and translations consume them. You cannot bring your own API key. For small sites the included credits may be enough; for a content-heavy site, automatic translation becomes a metered utility bill on top of the subscription.
What Polylang Gets Right (and Where It Hurts)
Polylang takes the opposite approach to workflow. Instead of a dedicated translation management layer, it treats each translation as a separate WordPress post linked to its siblings. If you know how to edit a post in WordPress, you know how to translate one with Polylang. There is no separate editor to learn, no job queue, no translation memory to configure. For solo site owners and small teams, this native feel is the main reason to choose it.
Polylang also has a genuinely free tier, which WPML does not. The free version handles basic translation of posts, pages, and taxonomies, and for a simple bilingual blog it can be enough. That makes Polylang the default recommendation for anyone who wants to try multilingual WordPress without spending money on day one.
The pain arrives at the edges of the free tier. String translation of theme and plugin text is limited, WooCommerce support requires the paid version, and URL slug translation is a Pro feature. Polylang Pro starts at €99 per year for a single site and scales to €495 per year for 25 sites, with no unlimited tier at all. Agencies managing many client sites hit that ceiling quickly, and the per-site math ends up less favorable than WPML's Agency tier. Automatic translation exists in Pro, but it is DeepL only, using your own DeepL API key. If you want to translate with OpenAI, Anthropic, or Google's models, Polylang has no path to them.
Head to Head: The Deciding Factors
Most published comparisons list dozens of features that both plugins share. What follows are the factors where the two actually diverge, because these are the ones that should decide the purchase.
Pricing over three years
Subscriptions compound. The WPML CMS tier (€99 per year for up to three production sites, and the tier most real sites need) costs €297 over three years. Polylang Pro for a single site costs the same €297 over three years. An agency running 20 client sites pays €597 for three years of WPML Agency, while the same agency on Polylang needs the 25-site tier at €1,485 over three years. Neither plugin has any endpoint where the paying stops.
The free tier
Polylang has one; WPML does not. If budget is zero, the decision is made for you. Just go in knowing which features sit behind the paywall, because a growing site tends to hit them within the first year.
Automatic translation
WPML offers more engines but locks them behind credits with no bring-your-own-key option. Polylang lets you use your own API key but supports only DeepL. Neither lets you point the plugin at a modern large language model of your choosing, which in 2026 is a noticeable gap, since LLM-based translation now routinely outperforms legacy machine translation on tone and context.
WooCommerce and page builders
Translating a store multiplies the surface area: products, variations, attributes, checkout strings. WPML handles WooCommerce through a separate add-on that effectively requires the higher tiers, historically priced around €89 per year on its own. Polylang covers WooCommerce in its Pro and business tiers. Elementor support is native in WPML and available in Polylang Pro. In both ecosystems, a store plus a page builder pushes you toward the expensive end of the pricing table.
SEO integration
Both plugins integrate with Yoast SEO and Rank Math, and both generate hreflang annotations for translated content. This matters more than it sounds: hreflang mistakes are among the most common international SEO failures, and hand-maintaining the tags is not realistic on a site of any size. The mechanics and the common pitfalls are covered in our guide to hreflang tags for international SEO.
Data collection
Both WPML and Polylang collect usage data from the sites they run on, on an opt-out basis. Whether that matters is a judgment call, but on client sites it is a conversation you should be having with the client rather than a default you inherit silently. If you work under strict privacy requirements, check what each plugin phones home before deploying it, and disable the collection explicitly where the option exists.
Switching between them
Migration between the two is possible but asymmetric. WPML provides a separate plugin to migrate Polylang sites to WPML, and Polylang offers a free plugin for the reverse direction. Both work, but plan for a staging-site rehearsal either way, because linked translations, menus, and string translations do not always map cleanly.
The Third Option: Pay Once Instead of Every Year
The assumption baked into this entire comparison is that multilingual WordPress costs a subscription. It is worth questioning that assumption before renewing anything, because it is no longer true.
Signocore Multilanguage is built as a direct alternative to both plugins with a different pricing model: the Pro version is €49 once, for unlimited sites, with lifetime updates. The free version is a complete multilingual plugin in its own right, covering up to 2 languages from a catalog of 67, with translation of posts, custom post types, taxonomies, menus, and strings, automatic hreflang tags, a language switcher, and per-language sitemaps.
Three details are directly relevant to anyone weighing WPML against Polylang:
Built-in import from both. The importer detects existing WPML or Polylang data, shows exactly what it found before writing anything, and reconnects your existing translations. Moving off a subscription does not mean retranslating your site.
A WPML compatibility layer. Themes and plugins written against WPML's hooks (
wpml_object_id,wpml_current_language,wpml_active_languages, and others) keep working unchanged. This removes the biggest practical blocker to leaving WPML: a theme built around it years ago.AI translation with your own key. Pro adds one-click translation using your own OpenAI, Anthropic, Google Gemini, or Mistral API key. There are no credits to buy, and every AI translation is saved as a draft for review before it goes live. Pro also bundles the WooCommerce, Elementor, Yoast SEO, and Rank Math integrations that both competitors reserve for their upper tiers, plus subdomain and custom-domain URL strategies.
The trade-off is maturity of ecosystem: WPML's decade of third-party testing is not something any newer plugin can claim. The compatibility layer narrows that gap deliberately, but if your site depends on an obscure plugin's specific WPML integration, test on staging first. That advice applies to any translation plugin change.
Which One Should You Choose?
An honest summary, by situation rather than by feature count:
Choose WPML if you run an agency with dedicated translators and need the translation management layer: job assignment, professional service integration, and a controlled review pipeline. That workflow is WPML's real product, and neither alternative replicates it fully.
Choose Polylang if you want a free entry point and a native editing feel, you are comfortable with DeepL as your only automatic translation option, and the number of sites you manage fits under its per-site pricing.
Choose Signocore Multilanguage if you are optimizing for total cost of ownership, want AI translation with a model and API key you control, or are already on WPML or Polylang and tired of the renewal cycle. The built-in importer and WPML compatibility layer exist precisely for that last group.
Whichever direction you take, the underlying discipline is the same: plan your language and URL structure before translating, keep your internationalization signals clean, and audit hreflang output after launch rather than assuming the plugin got it right.
Pricing and tier details in this comparison are accurate as of publication. All three products can and do change their tiers, so verify current pricing on the vendors' sites before purchasing.
