whichdb
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Bleve vs Sonic

Bleve: Pure-Go full-text, geo and vector indexing library from Couchbase. Sonic: Tiny schema-less Rust search backend that returns object IDs, running in a few MB of RAM.

key differences

  • Licensing: Bleve is open source (permissive) (Apache License 2.0); Sonic is open source (copyleft) (Mozilla Public License 2.0).
  • Bleve is built for larger datasets (≤ 10 TB) than Sonic (≤ 100 GB).
  • Horizontal scaling is manual in Bleve and none in Sonic.
  • Transactions: Bleve offers limited ACID; Sonic offers none.
  • Only Bleve has vector search, geospatial, json, compression.
  • Bleve can run embedded in your application process.

choose bleve for

  • +Embedding search in Go services and CLIs
  • +Desktop or self-hosted apps written in Go
  • +Hybrid text plus vector search in Go

best at · Search, Vector search, Embedded

choose sonic for

  • +Autocomplete and suggest
  • +Search over chat messages or helpdesk tickets
  • +Lightweight search for small servers

best at · Search

BlevePure-Go full-text, geo and vector indexing library from Couchbase.
SonicTiny schema-less Rust search backend that returns object IDs, running in a few MB of RAM.
overview
Primary model
Search Engine
Search Engine
Also supports
Vector, Spatial
Key-Value
Type
Embedded library
Database engine
Status
Active
Active
Developer
Couchbase and Bleve contributors
Valerian Saliou (Crisp)
First release
2014
2019
Latest version
2.6.1 (Aug 24, 2026)
1.10.2 (Oct 5, 2026)
License
Open source (permissive)Apache License 2.0
Open source (copyleft)Mozilla Public License 2.0
Free tier
✓
✓
popularity
WhichDB Score
12.2
8.3
Rank
#272
#326
GitHub stars
11.2K
21.4K
Stack Overflow questions
17
–
scale & guarantees
Comfortable data size
Medium (≤ 10 TB)
Small (≤ 100 GB)
Horizontal scaling
Manual
None
Multi-region
None
None
ACID
Limited
None
Consistency
Strong
Eventual
Schema
Flexible
Schemaless
Architecture
Embedded
Single node, 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
Bleve query string syntax, Go API
Sonic Channel protocol
Client languages
Go
JavaScript, Python, Go, Ruby, PHP, Java, Rust
Best for
Search, Vector search, Embedded, Geo
Search
Add more to this comparisonNot sure either fits? Try smart match

Bleve vs Sonic: FAQ

What is the difference between Bleve and Sonic?

Bleve: Pure-Go full-text, geo and vector indexing library from Couchbase. Sonic: Tiny schema-less Rust search backend that returns object IDs, running in a few MB of RAM. Licensing: Bleve is open source (permissive) (Apache License 2.0); Sonic is open source (copyleft) (Mozilla Public License 2.0). Bleve is built for larger datasets (≤ 10 TB) than Sonic (≤ 100 GB). Horizontal scaling is manual in Bleve and none in Sonic.

When should I choose Bleve over Sonic?

Choose Bleve for embedding search in Go services and CLIs; desktop or self-hosted apps written in Go; and hybrid text plus vector search in Go. Choose Sonic for autocomplete and suggest; search over chat messages or helpdesk tickets; and lightweight search for small servers.

Is Bleve or Sonic more popular?

Bleve ranks #272 on the WhichDB Score (12.2/100) and Sonic ranks #326 (8.3/100). Popularity is not fit: check the requirements that matter for your project.

Are Bleve and Sonic open source?

Yes. Bleve is open source. License: Apache License 2.0. Yes. Sonic is open source. License: Mozilla Public License 2.0.