--- title: "deepeval vs leva" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/confident-ai-deepeval-vs-kieranklaassen-leva" tools: ["confident-ai-deepeval", "kieranklaassen-leva"] --- # deepeval vs leva *GraphCanon updated Jul 29, 2026* ## Verdict Pick deepeval if deepeval is a Python-based framework designed for evaluating large language models with an array of metrics and evaluation methodologies; pick leva if leva is an LLM evaluation framework for Ruby on Rails apps, aiming to use production data directly in the evaluation process. [deepeval](https://deepeval.com) reports 17k GitHub stars, 1.7k forks, and 404 open issues, last pushed Jul 27, 2026. [leva](https://github.com/kieranklaassen/leva) has 142 stars, 7 forks, and 4 open issues, last pushed Jun 3, 2026. Figures are from public GitHub metadata via [deepeval's repository](https://github.com/confident-ai/deepeval) and [leva's repository](https://github.com/kieranklaassen/leva). | | [deepeval](/tools/confident-ai-deepeval.md) | [leva](/tools/kieranklaassen-leva.md) | | --- | --- | --- | | Tagline | LLM Evaluation Framework. | LLM Evaluation Framework for Rails apps | | Stars | 17,226 | 142 | | Forks | 1,736 | 7 | | Open issues | 404 | 4 | | Language | Python | Ruby | | Adopt for | Deepeval is a Python-based framework designed for evaluating large language models with an array of metrics and evaluation methodologies. | Leva is an LLM evaluation framework for Ruby on Rails apps, aiming to use production data directly in the evaluation process. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 License | MIT | | Categories | Evaluation & Observability | Evaluation & Observability | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [deepeval](/tools/confident-ai-deepeval.md) | [leva](/tools/kieranklaassen-leva.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Steady (60%) | | Days since push | 1d | 55d | | Open issues (now) | 404 | 4 | | Owner type | Organization | User | | Full report | [trust report](/tools/confident-ai-deepeval/trust.md) | [trust report](/tools/kieranklaassen-leva/trust.md) | ## Decision facts: deepeval - **Requirements:** Requires Python environment and familiarity with large language models to effectively utilize Deepeval's capabilities. - **Adopt for:** Deepeval is a Python-based framework designed for evaluating large language models with an array of metrics and evaluation methodologies. - **License detail:** Apache-2.0 License ## Decision facts: leva - **Adopt for:** Leva is an LLM evaluation framework for Ruby on Rails apps, aiming to use production data directly in the evaluation process. ## Choose when ### Choose deepeval if… - deepeval is primarily Python; leva is Ruby. - License: deepeval is Apache-2.0, leva is MIT. - Requirements: Requires Python environment and familiarity with large language models to effectively utilize Deepeval's capabilities.. - Tags unique to deepeval: evaluation, metrics. - When developing large language models and you need a comprehensive evaluation framework to measure their performance across various metrics. ### Choose leva if… - leva is primarily Ruby; deepeval is Python. - License: leva is MIT, deepeval is Apache-2.0. - Tags unique to leva: llm, rails-apps, ruby-on-rails. - You are working with Ruby on Rails applications and need a tool specific to this environment ## When NOT to use deepeval - For small-scale applications that do not require the depth of metrics and evaluations offered by Deepeval, as it might be overkill. - In situations where there is a need for real-time performance monitoring, since Deepeval focuses more on post-development evaluation rather than continuous runtime analysis. ## When NOT to use leva - If your application is not built using Ruby on Rails, Leva may not be the best fit - For scenarios requiring broader cross-platform support or with non-Rails production data integration needs, consider other tools ## Common questions ### What is the difference between deepeval and leva? deepeval: LLM Evaluation Framework.. leva: LLM Evaluation Framework for Rails apps. See the comparison table for live GitHub stats and shared categories. ### When should I choose deepeval over leva? Choose deepeval over leva when deepeval is primarily Python; leva is Ruby; License: deepeval is Apache-2.0, leva is MIT; Requirements: Requires Python environment and familiarity with large language models to effectively utilize Deepeval's capabilities.; Tags unique to deepeval: evaluation, metrics; When developing large language models and you need a comprehensive evaluation framework to measure their performance across various metrics. ### When should I choose leva over deepeval? Choose leva over deepeval when leva is primarily Ruby; deepeval is Python; License: leva is MIT, deepeval is Apache-2.0; Tags unique to leva: llm, rails-apps, ruby-on-rails; You are working with Ruby on Rails applications and need a tool specific to this environment. ### When should I avoid deepeval? For small-scale applications that do not require the depth of metrics and evaluations offered by Deepeval, as it might be overkill. In situations where there is a need for real-time performance monitoring, since Deepeval focuses more on post-development evaluation rather than continuous runtime analysis. ### When should I avoid leva? If your application is not built using Ruby on Rails, Leva may not be the best fit For scenarios requiring broader cross-platform support or with non-Rails production data integration needs, consider other tools ### Is deepeval or leva more popular on GitHub? deepeval has more GitHub stars (17,226 vs 142). Stars measure visibility, not whether either tool fits your constraints. ### Are deepeval and leva open source? Yes - both are open-source projects on GitHub (deepeval: Apache-2.0, leva: MIT). ### Where can I find alternatives to deepeval or leva? GraphCanon lists graph-backed alternatives at [deepeval alternatives](/tools/confident-ai-deepeval/alternatives) and [leva alternatives](/tools/kieranklaassen-leva/alternatives) ([deepeval markdown twin](/tools/confident-ai-deepeval/alternatives.md), [leva markdown twin](/tools/kieranklaassen-leva/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/confident-ai-deepeval-vs-kieranklaassen-leva.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, deepeval or leva? deepeval: Very active. leva: Steady. 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 deepeval and leva? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [deepeval trust report](/tools/confident-ai-deepeval/trust); [leva trust report](/tools/kieranklaassen-leva/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=confident-ai-deepeval`](/api/graphcanon/graph?tool=confident-ai-deepeval) - 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/_