--- title: "NumKong vs voy" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/ashvardanian-numkong-vs-tantaraio-voy" tools: ["ashvardanian-numkong", "tantaraio-voy"] --- # NumKong vs voy *GraphCanon updated Aug 23, 2026* ## Verdict Pick NumKong if numKong emphasizes SIMD-accelerated numerical operations with bindings in multiple languages including Python, Rust, C, C++, Swift, JS, and Go; pick voy if voy specializes in Webassembly-based vector similarity searches, coded in Rust, with support for k-d-trees and nearest-neighbor searching. [NumKong](https://ashvardanian.com/posts/numkong) reports 1.9k GitHub stars, 128 forks, and 45 open issues, last pushed Aug 22, 2026. [voy](https://www.npmjs.com/package/voy-search) has 1.1k stars, 41 forks, and 22 open issues, last pushed Sep 20, 2023. Figures are from public GitHub metadata via [NumKong's repository](https://github.com/ashvardanian/NumKong) and [voy's repository](https://github.com/tantaraio/voy). | | [NumKong](/tools/ashvardanian-numkong.md) | [voy](/tools/tantaraio-voy.md) | | --- | --- | --- | | Tagline | SIMD-accelerated numerical operations for multiple languages and platforms | A WASM vector similarity search written in Rust | | Stars | 1,875 | 1,069 | | Forks | 128 | 41 | | Open issues | 45 | 22 | | Language | C | Rust | | Adopt for | NumKong emphasizes SIMD-accelerated numerical operations with bindings in multiple languages including Python, Rust, C, C++, Swift, JS, and Go. | Voy specializes in Webassembly-based vector similarity searches, coded in Rust, with support for k-d-trees and nearest-neighbor searching. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | Apache-2.0 | | Categories | Data & Retrieval, Model Training | Vector Databases | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [NumKong](/tools/ashvardanian-numkong.md) | [voy](/tools/tantaraio-voy.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Dormant (18%) | | Days since push | 0d | 1067d | | Open issues (now) | 45 | 22 | | Stars delta | +18 (30d) | +4 (30d) | | Open issues delta | +14 (30d) | 0 (30d) | | Owner type | User | Organization | | Full report | [trust report](/tools/ashvardanian-numkong/trust.md) | [trust report](/tools/tantaraio-voy/trust.md) | ## Decision facts: NumKong - **Adopt for:** NumKong emphasizes SIMD-accelerated numerical operations with bindings in multiple languages including Python, Rust, C, C++, Swift, JS, and Go. ## Decision facts: voy - **Adopt for:** Voy specializes in Webassembly-based vector similarity searches, coded in Rust, with support for k-d-trees and nearest-neighbor searching. ## Choose when ### Choose NumKong if… - NumKong is primarily C; voy is Rust. - Tags unique to NumKong: language-bindings, matrix-multiplication, numeric-types, simd-optimization. - Also covers Data & Retrieval, Model Training. - When you require highly optimized numerical computations across a variety of platforms like x86, Arm, RISC-V, or WASM for better performance ### Choose voy if… - voy is primarily Rust; NumKong is C. - Tags unique to voy: k-d-tree, nearest-neighbor-search, rust, similarity-search. - Also covers Vector Databases. - When you require a Rust implementation of WebAssembly for embedding in web applications or for secure sandboxed execution on the server-side. ## When NOT to use NumKong - If your application does not benefit from SIMD optimizations or operates on platforms not supported by NumKong - When you are working exclusively with a single language without the need for cross-language binding support, as this might add overhead and complexity ## When NOT to use voy - If high availability and extensive fault tolerance features are required, as Voy focuses primarily on vector similarity searches rather than system-wide reliability enhancements. - When your project demands integration with existing large-scale SQL database systems, since Voy is specialized for a specific type of search operation. ## Common questions ### What is the difference between NumKong and voy? NumKong: SIMD-accelerated numerical operations for multiple languages and platforms. voy: A WASM vector similarity search written in Rust. See the comparison table for live GitHub stats and shared categories. ### When should I choose NumKong over voy? Choose NumKong over voy when NumKong is primarily C; voy is Rust; Tags unique to NumKong: language-bindings, matrix-multiplication, numeric-types, simd-optimization; Also covers Data & Retrieval, Model Training; When you require highly optimized numerical computations across a variety of platforms like x86, Arm, RISC-V, or WASM for better performance. ### When should I choose voy over NumKong? Choose voy over NumKong when voy is primarily Rust; NumKong is C; Tags unique to voy: k-d-tree, nearest-neighbor-search, rust, similarity-search; Also covers Vector Databases; When you require a Rust implementation of WebAssembly for embedding in web applications or for secure sandboxed execution on the server-side. ### When should I avoid NumKong? If your application does not benefit from SIMD optimizations or operates on platforms not supported by NumKong When you are working exclusively with a single language without the need for cross-language binding support, as this might add overhead and complexity ### When should I avoid voy? If high availability and extensive fault tolerance features are required, as Voy focuses primarily on vector similarity searches rather than system-wide reliability enhancements. When your project demands integration with existing large-scale SQL database systems, since Voy is specialized for a specific type of search operation. ### Is NumKong or voy more popular on GitHub? NumKong has more GitHub stars (1,875 vs 1,069). Stars measure visibility, not whether either tool fits your constraints. ### Are NumKong and voy open source? Yes - both are open-source projects on GitHub (NumKong: Apache-2.0, voy: Apache-2.0). ### Where can I find alternatives to NumKong or voy? GraphCanon lists graph-backed alternatives at [NumKong alternatives](/tools/ashvardanian-numkong/alternatives) and [voy alternatives](/tools/tantaraio-voy/alternatives) ([NumKong markdown twin](/tools/ashvardanian-numkong/alternatives.md), [voy markdown twin](/tools/tantaraio-voy/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/ashvardanian-numkong-vs-tantaraio-voy.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, NumKong or voy? NumKong: Very active. voy: Dormant. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for NumKong and voy? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [NumKong trust report](/tools/ashvardanian-numkong/trust); [voy trust report](/tools/tantaraio-voy/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=ashvardanian-numkong`](/api/graphcanon/graph?tool=ashvardanian-numkong) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_