--- title: "chroma vs lever" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/chroma-core-chroma-vs-niansong1996-lever" tools: ["chroma-core-chroma", "niansong1996-lever"] --- # chroma vs lever *GraphCanon updated Jul 11, 2026* ## Verdict Pick chroma when chroma is primarily Rust; lever is Python; pick lever when lever is primarily Python; chroma is Rust. [chroma](https://www.trychroma.com/) reports 29k GitHub stars, 2.4k forks, and 728 open issues, last pushed Jul 10, 2026. [lever](https://arxiv.org/abs/2302.08468) has 90 stars, 8 forks, and 2 open issues, last pushed Jul 5, 2023. Figures are from public GitHub metadata via [chroma's repository](https://github.com/chroma-core/chroma) and [lever's repository](https://github.com/niansong1996/lever). | | [chroma](/tools/chroma-core-chroma.md) | [lever](/tools/niansong1996-lever.md) | | --- | --- | --- | | Tagline | Search infrastructure for AI | Code for paper "LEVER: Learning to Verifiy Language-to-Code Generation with Execution" (ICML'23) | | Stars | 28,763 | 90 | | Forks | 2,377 | 8 | | Open issues | 728 | 2 | | Language | Rust | Python | | Adopt for | Chroma is an open-source data infrastructure for AI designed to support vector, hybrid, and full-text search capabilities with high performance. | - | | Persona | - | - | | Runtime | - | - | | License | Chroma is released under the Apache 2.0 license. | MIT | | Categories | Data & Retrieval, Vector Databases | Data & Retrieval | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [chroma](/tools/chroma-core-chroma.md) | [lever](/tools/niansong1996-lever.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Dormant (18%) | | Days since push | 0d | 1102d | | Open issues (now) | 728 | 2 | | Owner type | Organization | User | | Security scan | 8 low (8 low) | No criticals | | Full report | [trust report](/tools/chroma-core-chroma/trust.md) | [trust report](/tools/niansong1996-lever/trust.md) | ## Decision facts: chroma - **Pricing:** freemium - The open-source version is free to use and modify; the hosted service (Chroma Cloud) has a freemium model offering $5 of initial credits. - **Requirements:** Min 1 GB RAM - **Adopt for:** Chroma is an open-source data infrastructure for AI designed to support vector, hybrid, and full-text search capabilities with high performance. - **License detail:** Chroma is released under the Apache 2.0 license. ## Choose when ### Choose chroma if… - chroma is primarily Rust; lever is Python. - License: chroma is Apache-2.0, lever is MIT. - Pricing: The open-source version is free to use and modify; the hosted service (Chroma Cloud) has a freemium model offering $5 of initial credits.. - Requirements: Min 1 GB RAM. - Tags unique to chroma: agents, ai-agents, database, full-text-search. - Also covers Vector Databases. - - When you require a high-performance data infrastructure that can handle complex query needs for AI applications. - If your project necessitates fast, cost-effective, and scalable serverless services ### Choose lever if… - lever is primarily Python; chroma is Rust. - License: lever is MIT, chroma is Apache-2.0. - Tags unique to lever: python. ## When NOT to use chroma - - In scenarios where a more mature or enterprise-grade solution is required, as Chroma might be rapidly evolving and not yet fully stabilized. - - If your project requires extensive customization at the lower levels that the relatively new tool might not support comprehensively yet - - When the specific need for an AI application does not benefit from vector, hybrid, or full-text search capabilities that Chroma excels in. ## When NOT to use lever - Last GitHub push was 1103 days ago (dormant maintenance, Jul 5, 2023). Validate activity before betting a new project on lever. - Data & Retrieval: Skip a heavy ingestion framework when your corpus is small and static; a script plus the embedding API is enough. ## Common questions ### What is the difference between chroma and lever? chroma: Search infrastructure for AI. lever: Code for paper "LEVER: Learning to Verifiy Language-to-Code Generation with Execution" (ICML'23). See the comparison table for live GitHub stats and shared categories. ### When should I choose chroma over lever? Choose chroma over lever when chroma is primarily Rust; lever is Python; License: chroma is Apache-2.0, lever is MIT; Pricing: The open-source version is free to use and modify; the hosted service (Chroma Cloud) has a freemium model offering $5 of initial credits.; Requirements: Min 1 GB RAM; Tags unique to chroma: agents, ai-agents, database, full-text-search; Also covers Vector Databases; - When you require a high-performance data infrastructure that can handle complex query needs for AI applications. - If your project necessitates fast, cost-effective, and scalable serverless services. ### When should I choose lever over chroma? Choose lever over chroma when lever is primarily Python; chroma is Rust; License: lever is MIT, chroma is Apache-2.0; Tags unique to lever: python. ### When should I avoid chroma? - In scenarios where a more mature or enterprise-grade solution is required, as Chroma might be rapidly evolving and not yet fully stabilized. - If your project requires extensive customization at the lower levels that the relatively new tool might not support comprehensively yet - When the specific need for an AI application does not benefit from vector, hybrid, or full-text search capabilities that Chroma excels in. ### When should I avoid lever? Last GitHub push was 1103 days ago (dormant maintenance, Jul 5, 2023). Validate activity before betting a new project on lever. Data & Retrieval: Skip a heavy ingestion framework when your corpus is small and static; a script plus the embedding API is enough. ### Is chroma or lever more popular on GitHub? chroma has more GitHub stars (28,763 vs 90). Stars measure visibility, not whether either tool fits your constraints. ### Are chroma and lever open source? Yes - both are open-source projects on GitHub (chroma: Apache-2.0, lever: MIT). ### Where can I find alternatives to chroma or lever? GraphCanon lists graph-backed alternatives at [chroma alternatives](/tools/chroma-core-chroma/alternatives) and [lever alternatives](/tools/niansong1996-lever/alternatives) ([chroma markdown twin](/tools/chroma-core-chroma/alternatives.md), [lever markdown twin](/tools/niansong1996-lever/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/chroma-core-chroma-vs-niansong1996-lever.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, chroma or lever? chroma: Very active. lever: 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 chroma and lever? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [chroma trust report](/tools/chroma-core-chroma/trust); [lever trust report](/tools/niansong1996-lever/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=chroma-core-chroma`](/api/graphcanon/graph?tool=chroma-core-chroma) - 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/_