* AllegroGraph is 100 percent ACID, supporting Transactions: Commit, Rollback, and Checkpointing. * Full and Fast Recoverability * 100% Read Concurrency, Near Full Write Concurrency * Online Backups, Point-in-Time Recovery, Replication, Warm Standby * Dynamic and Automatic Indexing – All committed triples are always indexed (7 indices) * Advanced Text Indexing – Text indexing per predicate * SOLR and MongoDB Integration * SPIN support (SPARQL Inferencing Notation). The SPIN API allows you to define a function in terms of a SPARQL query and then call that function in other SPARQL queries. These SPIN functions can appear in FILTERs and can also be used to compute values in assignment and select expressions. * All Clients based on REST Protocol – Java Sesame, Java Jena, Python, C#, Clojure, Perl, Ruby, Scala, and Lisp clients * Completely multi-processing based (SMP) – Automatic Resource Management for all processors and disks, and optimized memory use. See the performance tuning guide here, and server configuration guide here * The AllegroGraph RDF server can be scripted using the JavaScript API * JavaScript-based interface (JIG) for general graph traversal * Soundex support - Allows Free text indexing based on phonetic pronunciation * User-defined Indices - fully controllable by system administrator

* Elastic and linear scalability for a growing data and user base. * Data distribution and replication for performance and fault tolerance. * Multi-datacenter high availability and hot backups. * Support for ACID and eventual consistency. * Support for various storage backends: - Apache Cassandra - Apache HBase - Oracle BerkeleyDB * Support for global graph data analytics, reporting, and ETL * Support for geo, numeric range, and full-text search via ElasticSearch, Solr, and Lucene * Native integration with the TinkerPop graph stack