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Tantivy vs Xapian

Tantivy: Lucene-inspired full-text search library in Rust, the engine under Quickwit and ParadeDB. Xapian: Mature C++ probabilistic full-text search library with bindings for a dozen languages.

key differences

  • Licensing: Tantivy is open source (permissive) (MIT License); Xapian is open source (copyleft) (GNU GPL v2 or later).
  • Only Tantivy has json, columnar storage.
  • Only Xapian has transactions, geospatial.

choose tantivy for

  • +Embedding full-text search in Rust applications
  • +Building custom search services
  • +Search inside other databases (e.g., Postgres extensions)

best at · Search, Embedded

choose xapian for

  • +Search inside desktop and server applications
  • +Indexing documentation, mail archives or websites with Omega
  • +Search in Python, Perl or PHP apps without running a search server

best at · Search, Embedded

TantivyLucene-inspired full-text search library in Rust, the engine under Quickwit and ParadeDB.
XapianMature C++ probabilistic full-text search library with bindings for a dozen languages.
overview
Primary model
Search Engine
Search Engine
Also supports
–
–
Type
Embedded library
Embedded library
Status
Active
Active
Developer
Quickwit (Datadog) and contributors
Xapian project (Olly Betts and contributors)
First release
2016
2002
Latest version
0.27.0 (Oct 17, 2026)
2.1.0 (Aug 13, 2026)
License
Open source (permissive)MIT License
Open source (copyleft)GNU GPL v2 or later
Free tier
✓
✓
popularity
WhichDB Score
22.6
18.0
Rank
#135
#185
GitHub stars
16.3K
877
Stack Overflow questions
–
105
scale & guarantees
Comfortable data size
Medium (≤ 10 TB)
Medium (≤ 10 TB)
Horizontal scaling
Manual
Manual
Multi-region
None
None
ACID
Limited
Limited
Consistency
Strong
Strong
Schema
Strict
Schemaless
Architecture
Embedded
Embedded, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
—
Serverless
—
—
Embedded
✓
✓
Edge
—
—
Clouds
–
–
capabilities
Transactions
—
✓
Joins
—
—
Secondary indexes
—
—
Full-text search
✓
✓
Vector search
—
—
Geospatial
—
✓
JSON
✓
—
Change data capture
—
—
Triggers
—
—
Stored procedures
—
—
Materialized views
—
—
TTL / expiry
—
—
Pub/Sub
—
—
Columnar storage
✓
—
In-memory
—
—
Durable persistence
✓
✓
Compression
✓
✓
Encryption at rest
—
—
Role-based access
—
—
Time travel
—
—
Branching
—
—
Online schema changes
—
—
Streaming ingest
—
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
Tantivy query parser (Lucene-like), Rust API
Xapian query parser syntax, Query API
Client languages
Rust, Python
C++, Python, Perl, PHP, Java, Ruby, C#, Tcl
Best for
Search, Embedded
Search, Embedded
Add more to this comparisonNot sure either fits? Try smart match

Tantivy vs Xapian: FAQ

What is the difference between Tantivy and Xapian?

Tantivy: Lucene-inspired full-text search library in Rust, the engine under Quickwit and ParadeDB. Xapian: Mature C++ probabilistic full-text search library with bindings for a dozen languages. Licensing: Tantivy is open source (permissive) (MIT License); Xapian is open source (copyleft) (GNU GPL v2 or later). Only Tantivy has json, columnar storage. Only Xapian has transactions, geospatial.

When should I choose Tantivy over Xapian?

Choose Tantivy for embedding full-text search in Rust applications; building custom search services; and search inside other databases (e.g., Postgres extensions). Choose Xapian for search inside desktop and server applications; indexing documentation, mail archives or websites with Omega; and search in Python, Perl or PHP apps without running a search server.

Is Tantivy or Xapian more popular?

Tantivy ranks #135 on the WhichDB Score (22.6/100) and Xapian ranks #185 (18.0/100). Popularity is not fit: check the requirements that matter for your project.

Are Tantivy and Xapian open source?

Yes. Tantivy is open source. License: MIT License. Yes. Xapian is open source. License: GNU GPL v2 or later.