| Hounder | Nutch | Solr | |
|---|---|---|---|
| Distributable search |  |
 |
 |
| Distributable indexing | |
|
|
| Distributable crawling | |
|
|
| Individual component distributability | |
|
|
| Overall scalability | |
|
|
| Web crawling support | |
|
|
| Content-aware crawl targeting | |
|
|
| Complex search queries support | |
|
|
| Indexing time document boost support | |
|
|
| Search time document boost support | |
|
|
| supported |
| partially supported |
| unsupported |
