Most WordPress sites have broken search without knowing it. The default search misses content in custom fields, ranks results by date instead of relevance, and cannot search WooCommerce product attributes. Relevanssi and SearchWP both replace the default search with something better. This comparison helps you choose between them – or decide the default is actually fine.
When Default WordPress Search Is Good Enough
The default search works adequately for: simple blogs with post content only and no custom fields, sites where visitors rarely use search (check your analytics – if search drives under 1% of page views, optimising it is low priority), and sites where content is primarily in post titles and body text without structured custom field data.
Before installing any search plugin, check whether search is actually a problem. Look at your site’s search analytics in Google Analytics – how often is search used, what are people searching for, and are they finding results? If search volume is low, the effort of setting up and maintaining a search plugin may not be justified.
Relevanssi Free: The Practical Upgrade
Relevanssi free is the right choice for most sites that need better search than the default. It indexes custom fields, provides relevance ranking, highlights matched terms in excerpts, and handles most search quality problems without cost. The setup takes 15 minutes. For content sites, WooCommerce stores with standard products, and sites with ACF data that should be searchable, Relevanssi free covers the requirement.
SearchWP: When You Need More
SearchWP is a premium plugin ($99/year) with more advanced features: custom search engines with different index and weighting configurations per use case, deep WooCommerce integration, file content indexing (search inside PDFs, Word documents), and more sophisticated relevance tuning. It is the right choice when: you need multiple different search experiences on the same site (site-wide search vs a product search vs a documentation search, each with different weights and sources), or when you need to search file content, not just post content.
| Feature | Default Search | Relevanssi Free | SearchWP Pro |
|---|---|---|---|
| Relevance ranking | No (date order) | Yes | Yes (advanced) |
| Custom fields indexing | No | Yes | Yes |
| WooCommerce products | Basic | Good | Excellent |
| PDF/file content search | No | No | Yes |
| Multiple search engines | No | No | Yes |
| Fuzzy/partial matching | No | Premium only | Yes |
| Cost | Free | Free / $99+/yr | $99/yr |
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Making the Decision
Start with Relevanssi free. It solves the most common search problems at no cost and with minimal setup. If you find specific limitations – you need to search PDF content, you need separate search indexes for different site sections, or you need more granular relevance control than Relevanssi provides – evaluate SearchWP for those specific needs. Do not pay for SearchWP if Relevanssi free covers your requirements.
Search Analytics: Know Before You Invest
Before spending money or time on a search plugin, check whether search is actually a significant user behaviour on your site. In GA4, go to Reports -> Engagement -> Events and look for site_search events (if site search tracking is enabled). If fewer than 2% of sessions involve a search, optimising search yields minimal return. If 10-20% of sessions involve search and zero-result rates are high, fixing search has direct impact on engagement and conversion. The data should drive the decision, not assumptions about whether search “should” be better.
Check also which queries produce zero results. A list of zero-result searches tells you exactly what content gaps exist and exactly which custom fields or post types need to be added to the search index. This is more actionable than a general sense that “search feels broken.”