Compare / Opensolr
WarpSearch vs Opensolr
Hosted Apache Solr on fixed plans with small per-index disk caps. Opensolr's listed plans stop at 300 MB per index, and 99.9% uptime is Enterprise only. WarpSearch has no per-collection cap and a 99.9% SLA from $10.
Looking for an Opensolr alternative that grows past a few hundred megabytes? WarpSearch answers the Solr HTTP API, so SolrJ, pysolr and your existing queries connect with a new endpoint. There is no per-index disk cap, vector and hybrid search cost the same as any request, and every paid account gets a 99.9% uptime SLA.
Head to head
Each pair compares the entry plans as listed. Longer bars are better for size and included requests; shorter is better for downtime.
Minutes a month. 99.9% SLA on WarpSearch from $10 vs 98% uptime on Opensolr Small
Index size. WarpSearch's free tier vs Opensolr Large at €53. Paid WarpSearch collections have no size cap
Requests a month. The $10 WarpSearch minimum buys 5M requests of any kind; Opensolr includes 500 AI requests a month
How they bill
| WarpSearch | Opensolr | |
|---|---|---|
| Billing unit | Per GB stored, per GB written, per request | Fixed plans by index count and disk, billed yearly |
| Index size | No per-collection cap | 100 MB (Small) to 300 MB (Large) per index; more on Enterprise by quote |
| Uptime SLA | 99.9% on every paid account, from $10 | 98% on Small, 99% on Medium and Large; 99.9% on Enterprise only |
| Vector and AI search | Same $2 per million as any request | 500 AI requests a month included; more from €5 to €2,500 a month |
| Collections | 5 on Starter, more as you grow | 1 to 3 indexes on listed plans |
| APIs | Solr, Elasticsearch, OpenSearch, SQL and PPL | Solr |
| Clouds | AWS, Google Cloud, Azure, or your own account | Region choice per index |
What Opensolr cannot do, or does only in part: Listed plans cap each index at 100 to 300 MB, with 1 to 3 indexes. Uptime is 98% on Small and 99% on Medium and Large; 99.9% is Enterprise only, at a custom price. 500 AI requests a month are included, with more sold in tiers up to €2,500 a month. Backup Manager is a paid add-on. The API allows 120 requests a minute per account.
Performance
| Test | Result |
|---|---|
| Keyword search, 2.8M docs (LoTTE) | 2.1 ms median, 3,700 queries/s |
| Keyword search, 10M passages (MS MARCO v2) | 2.4 ms median (5.4 ms with an exact total hit count) |
| Keyword search, small BEIR sets | 1 to 6 ms median |
| Vector search, 10M x 128-dim (BigANN SIFT) | 0.964 recall@10 at 6.2 ms median, 162 queries/s |
| Vector search, 1M x 1536-dim (arXiv) | 0.961 recall@10 at 15.7 ms median |
| Filtered vector search, 10M (YFCC) | 0.959 recall@10 at 10.4 ms median |
| Log filters, 22M events (http_logs) | 1 to 2 ms median |
| Log aggregations, 22M events | 190 to 430 ms median (sort, daily histogram, avg by status) |
| Ingest, short text | 63,000 to 97,000 docs/s |
| Ingest, logs (247M events) | 76,000 to 81,000 events/s |
| Ingest, 768 to 1536-dim vectors | 2,200 to 4,000 vectors/s |
| Time to searchable | Seconds, or immediate with commit=true |
Measured October 2026 through our Elasticsearch-compatible API, warm cache, client in the same region, single runs. Every test ran on deliberately minimal hardware, 2 to 4 CPUs (a 4 CPU container or an AWS i8g.large with 2 vCPUs), so these are the least favorable results we can produce. More hardware only improves them. Numbers exclude internet round trips.
Bottom line
Choose WarpSearch for
- Indexes past a few hundred megabytes, without an Enterprise quote.
- A 99.9% uptime SLA from $10, instead of 98 to 99% on the listed plans.
- Vector and hybrid search at $2 per million, instead of AI request tiers.
- One collection for keyword, vector, facets and logs, through the Solr, Elasticsearch or OpenSearch API.
Pick WarpSearch when your Solr index outgrows a few hundred megabytes, or when you need a 99.9% SLA without an Enterprise contract.
Questions
How much does Opensolr cost?
Opensolr lists Small from €17 a month (1 index, 100 MB), Medium from €35 (2 indexes, 200 MB each) and Large from €53 (3 indexes, 300 MB each), billed yearly. Enterprise is custom. WarpSearch is free up to 1 GB, then from $10 a month with no per-collection cap.
What uptime does Opensolr guarantee?
Its pricing page lists 98% on Small and 99% on Medium and Large, which allows about 14 hours and 7 hours of downtime a month. 99.9% is listed on Enterprise only. Every paid WarpSearch account has a 99.9% uptime SLA, about 43 minutes a month.
What if my Solr index is bigger than 300 MB?
On Opensolr that means the Enterprise plan and a custom quote. On WarpSearch a collection has no size cap: storage is $0.08 per GB a month, and less at volume. A 10 GB catalog costs well under $1 a month to store.
Does Opensolr include vector search?
Opensolr includes 500 AI requests a month and sells more in tiers, up to €2,500 a month for 1M. On WarpSearch a vector or hybrid search is a normal request at $2 per million, so the $10 minimum alone covers 5M of them.
Does WarpSearch work with my Solr clients?
WarpSearch serves the Solr HTTP API with Solr-shaped JSON and javabin responses, so SolrJ, pysolr and other Solr clients connect with a base URL and an API key header. See Solr compatibility.
Sources
Opensolr prices are in euros, from the yearly rate. Prices checked October 20, 2026. List prices in US dollars, before discounts. Estimates are marked. Tell us if something is out of date: contact us.