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Head-to-head · Data Virtualization Software

Query Streams vs Stardog

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Query Streams #5 in Data Virtualization Software 8.8/10 Free plan · 30-day trial Free planFree trial✓ 2 of 3 features Visit Query Streams
Stardog #8 in Data Virtualization Software 8.5/10 Free plan Free plan✓ 0 of 3 features Visit Stardog

Query Streams leads on 0 checks, Stardog on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreQuery Streams · 8.8/10
  • Free planboth
  • Free trialonly Query Streams
  • Most featuresQuery Streams · 2 of 3

Query Streams scores higher on our rubric for data virtualization software: 8.8 against 8.5 out of 10; our editors rank them #5 and #8.

Query Streams is the better fit for affordable connector-rich federation. Stardog is the better fit for semantic virtual graphs with a free plan.

  • Query Streams fits best

    Affordable connector-rich federation

  • Stardog fits best

    Semantic virtual graphs with a free plan

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Query Streams 8.8/10 Visit ↗ Stardog 8.5/10 Visit ↗
At a glance
Editor score 8.8 8.5
Ranking #5 in Data Virtualization Software #8 in Data Virtualization Software
Best for Affordable connector-rich federation Semantic virtual graphs with a free plan
Pricing model Free plan + paid Free plan + paid
Starting price $15/mo —
Free plan ✓ ✓
Free trial 30 days —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web, Windows, macOS, Linux Web
Support Docs Community, Docs · 24/7
Integrations 59+ integrations 20 integrations
Built for Solo, Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Query Streams 2/3 · Stardog 0/3
Semantic layer — Not checked yet
REST API access ✓ (best) Not checked yet
Query acceleration ✓ (best) Not checked yet
Specs
Deployment model Hybrid Not checked yet
Source connectors 59 Not checked yet
Access protocols SQL, REST API, MCP Not checked yet
Our review
Pros
  • Federated SQL queries without copying data
  • 59 verified connectors across databases and APIs
  • MCP, REST API, spreadsheets and scheduled automation
  • Queries relational, NoSQL, file, and SPARQL data through virtual graphs
  • Combines SPARQL, SQL, GraphQL, REST, inference, and ontology management
  • Offers cloud and self-managed deployment with a 99.9% uptime SLA on Enterprise
Cons
  • No formal semantic modeling layer
  • Business-tier reporting and automation starts at $50 per month
  • Personal Core includes a 25 MB/month data allowance
  • The Free plan supports up to 1 million stored edges
  • Enterprise pricing is available through contact sales
  • Community support is limited to the Free plan
Our verdict

Query Streams is a data integration and query platform for analysts and teams that need live SQL access across databases, APIs and spreadsheets. It supports federated queries across multiple databases, represents API endpoints as queryable…

Read the review →

Stardog is a knowledge-graph and semantic AI platform for enterprises that need to connect and query distributed data. Its virtual graphs can query remote relational, NoSQL, file, and SPARQL sources without necessarily moving the data.…

Read the review →
  1. Query StreamsData Virtualization Software 8.8Free plan · 30-day trial
  2. StardogData Virtualization Software 8.5Free plan

Strengths and trade-offs

  • Query Streams — where it wins

    • Federated SQL queries without copying data
    • 59 verified connectors across databases and APIs
    • MCP, REST API, spreadsheets and scheduled automation

    Where it doesn't

    • No formal semantic modeling layer
    • Business-tier reporting and automation starts at $50 per month
    • Personal Core includes a 25 MB/month data allowance

  • Stardog — where it wins

    • Queries relational, NoSQL, file, and SPARQL data through virtual graphs
    • Combines SPARQL, SQL, GraphQL, REST, inference, and ontology management
    • Offers cloud and self-managed deployment with a 99.9% uptime SLA on Enterprise

    Where it doesn't

    • The Free plan supports up to 1 million stored edges
    • Enterprise pricing is available through contact sales
    • Community support is limited to the Free plan
  • Query Streams8.8/10 · Free plan · 30-day trial

    A focused, affordable federation layer with broad connectors and practical delivery options.

    Visit Query StreamsFull verdict →
  • Stardog8.5/10 · Free plan

    A mature semantic virtualization platform with federated queries, reasoning, and a free plan.

    Visit StardogFull verdict →

More comparisons

All data virtualization software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update