--- title: "carla vs voy" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/carla-simulator-carla-vs-tantaraio-voy" tools: ["carla-simulator-carla", "tantaraio-voy"] --- # carla vs voy *GraphCanon updated Jul 11, 2026* ## Verdict Pick carla when carla is primarily C++; voy is Rust; pick voy when voy is primarily Rust; carla is C++. [carla](http://carla.org) reports 14k GitHub stars, 4.6k forks, and 1.2k open issues, last pushed Jul 10, 2026. [voy](https://www.npmjs.com/package/voy-search) has 1.1k stars, 39 forks, and 22 open issues, last pushed Sep 20, 2023. Figures are from public GitHub metadata via [carla's repository](https://github.com/carla-simulator/carla) and [voy's repository](https://github.com/tantaraio/voy). | | [carla](/tools/carla-simulator-carla.md) | [voy](/tools/tantaraio-voy.md) | | --- | --- | --- | | Tagline | Open-source simulator for autonomous driving research. | 🕸️🦀 A WASM vector similarity search written in Rust | | Stars | 14,161 | 1,063 | | Forks | 4,626 | 39 | | Open issues | 1,185 | 22 | | Language | C++ | Rust | | Adopt for | - | - | | Persona | - | - | | Runtime | - | - | | License | MIT | Apache-2.0 | | Categories | Model Training, AI Agents, Vector Databases | Vector Databases | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [carla](/tools/carla-simulator-carla.md) | [voy](/tools/tantaraio-voy.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Dormant (18%) | | Days since push | 1d | 1024d | | Open issues (now) | 1.2k | 22 | | Security scan | 6 low (6 low) | No lockfile | | Full report | [trust report](/tools/carla-simulator-carla/trust.md) | [trust report](/tools/tantaraio-voy/trust.md) | ## Choose when ### Choose carla if… - carla is primarily C++; voy is Rust. - License: carla is MIT, voy is Apache-2.0. - Tags unique to carla: ai, artificial-intelligence, carla-simulator, cross-platform. - Also covers Model Training, AI Agents. ### Choose voy if… - voy is primarily Rust; carla is C++. - License: voy is Apache-2.0, carla is MIT. - Tags unique to voy: webassembly, similarity-search, rust, k-d-tree. ## When NOT to use carla - Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. - AI Agents: Don't use an agent loop when a deterministic workflow would do; agents add latency, cost, and non-determinism. - Vector Databases: Don't reach for a dedicated vector DB under ~100k vectors; pgvector on your existing Postgres is simpler to operate. ## When NOT to use voy - Last GitHub push was 1025 days ago (dormant maintenance, Sep 20, 2023). Validate activity before betting a new project on voy. - Vector Databases: Don't reach for a dedicated vector DB under ~100k vectors; pgvector on your existing Postgres is simpler to operate. ## Common questions ### What is the difference between carla and voy? carla: Open-source simulator for autonomous driving research.. voy: 🕸️🦀 A WASM vector similarity search written in Rust. See the comparison table for live GitHub stats and shared categories. ### When should I choose carla over voy? Choose carla over voy when carla is primarily C++; voy is Rust; License: carla is MIT, voy is Apache-2.0; Tags unique to carla: ai, artificial-intelligence, carla-simulator, cross-platform; Also covers Model Training, AI Agents. ### When should I choose voy over carla? Choose voy over carla when voy is primarily Rust; carla is C++; License: voy is Apache-2.0, carla is MIT; Tags unique to voy: webassembly, similarity-search, rust, k-d-tree. ### When should I avoid carla? Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. AI Agents: Don't use an agent loop when a deterministic workflow would do; agents add latency, cost, and non-determinism. Vector Databases: Don't reach for a dedicated vector DB under ~100k vectors; pgvector on your existing Postgres is simpler to operate. ### When should I avoid voy? Last GitHub push was 1025 days ago (dormant maintenance, Sep 20, 2023). Validate activity before betting a new project on voy. Vector Databases: Don't reach for a dedicated vector DB under ~100k vectors; pgvector on your existing Postgres is simpler to operate. ### Is carla or voy more popular on GitHub? carla has more GitHub stars (14,161 vs 1,063). Stars measure visibility, not whether either tool fits your constraints. ### Are carla and voy open source? Yes - both are open-source projects on GitHub (carla: MIT, voy: Apache-2.0). ### Where can I find alternatives to carla or voy? GraphCanon lists graph-backed alternatives at [carla alternatives](/tools/carla-simulator-carla/alternatives) and [voy alternatives](/tools/tantaraio-voy/alternatives) ([carla markdown twin](/tools/carla-simulator-carla/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/carla-simulator-carla-vs-tantaraio-voy.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, carla or voy? carla: 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 carla and voy? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [carla trust report](/tools/carla-simulator-carla/trust); [voy trust report](/tools/tantaraio-voy/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=carla-simulator-carla`](/api/graphcanon/graph?tool=carla-simulator-carla) - 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/_