Progress Semaphore vs AllegroGraph

Progress Semaphore9.0Visit AAllegroGraph8.6Visit

Higher score Progress Semaphore #3 in Knowledge Graph Software 9.0/10 Pricing on request · 30-day trial Free trial✓ 4 of 4 features Visit site

vs

A AllegroGraph #6 in Knowledge Graph Software 8.6/10 Free plan Free plan✓ 4 of 4 features Visit AllegroGraph

• Progress Semaphore fits best

  Mature ontology and semantic-classification teams

• AllegroGraph fits best

  Enterprise semantic graphs with advanced operations

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Side by side

Feature	Progress Semaphore 9.0/10 Visit ↗	AAllegroGraph 8.6/10 Visit ↗
At a glance
Editor score	9.0	8.6
Ranking	#3 in Knowledge Graph Software	#6 in Knowledge Graph Software
Best for	Mature ontology and semantic-classification teams	Enterprise semantic graphs with advanced operations
Pricing model	Paid	Free plan + paid
Starting price	—	—
Free plan	—	✓ (best)
Free trial	30 days	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web, Windows, Linux	Web, Windows, macOS, Linux
Support	Community, Docs	Email, Docs
Integrations	7 integrations	9 integrations
Built for	Mid-market, Enterprise	Mid-market, Enterprise
Features Progress Semaphore 4/4 · AllegroGraph 4/4
Ontology modeling	✓	✓
Semantic reasoning	✓	✓
RDF/SPARQL support	✓	✓
Graph visualization	✓	✓
Specs
Import formats	RDF, Excel spreadsheets	JSON-LD, N-Quads, N-Triples, Extended N-Quads, RDF/XML, TriG, TriX, Turtle, JSON, JSONLines, CSV
Deployment	Both	Both
Query languages	SPARQL	SPARQL, Prolog
Our review
Pros	Covers ontology, taxonomy, thesaurus, RDF, and SPARQL workflows Adds classification, fact extraction, enrichment, visualization, and mapping Supports web, Windows, Linux, APIs, and cloud, on-premises, or hybrid deployment	Free plan supports up to 5 million triples without expiration Combines SPARQL, Prolog, RDF storage, and semantic reasoning Supports sharding, federation, replication, and cloud or on-premises deployment
Cons	Contact-sales pricing makes plan comparison less immediate Its enterprise focus may exceed the needs of smaller teams Development is limited to demos, development, and capability evaluations	Enterprise pricing is quote-based Advanced capabilities may exceed the needs of smaller graph projects The Free plan is limited to 5 million triples
Our verdict	Progress Semaphore is a semantic AI platform for enterprises managing knowledge models, ontologies, taxonomies, controlled vocabularies, thesauri, and metadata. It is suited to teams building enterprise knowledge graphs, semantic search,… Read the review →	AllegroGraph is a semantic graph database for organizations building knowledge graphs, data fabrics, and AI applications. It stores RDF, graph, vector, document, and temporal data, with support for SPARQL, OWL reasoning, SHACL, rules, and… Read the review →

Strengths and trade-offs

• Progress Semaphore — where it wins

  • Covers ontology, taxonomy, thesaurus, RDF, and SPARQL workflows
  • Adds classification, fact extraction, enrichment, visualization, and mapping
  • Supports web, Windows, Linux, APIs, and cloud, on-premises, or hybrid deployment

  Where it doesn't

  • Contact-sales pricing makes plan comparison less immediate
  • Its enterprise focus may exceed the needs of smaller teams
  • Development is limited to demos, development, and capability evaluations

• AllegroGraph — where it wins

  • Free plan supports up to 5 million triples without expiration
  • Combines SPARQL, Prolog, RDF storage, and semantic reasoning
  • Supports sharding, federation, replication, and cloud or on-premises deployment

  Where it doesn't

  • Enterprise pricing is quote-based
  • Advanced capabilities may exceed the needs of smaller graph projects
  • The Free plan is limited to 5 million triples

• Progress Semaphore9.0/10 · Pricing on request · 30-day trial

  A mature platform for ontology management, semantic enrichment, and enterprise knowledge graphs.

  Visit siteFull verdict →
• AAllegroGraph8.6/10 · Free plan

  A mature graph database combining semantic reasoning, operations, visualization, and AI features.

  Visit AllegroGraphFull verdict →