--- title: "jiwer vs langevals" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/jitsi-jiwer-vs-langwatch-langevals" tools: ["jitsi-jiwer", "langwatch-langevals"] --- # jiwer vs langevals *GraphCanon updated Aug 9, 2026* ## Verdict Pick jiwer if a Python library for assessing speech-to-text systems with word error rate measures; pick langevals if langEvals is an amalgamation platform for various language model evaluators under one umbrella. This tool offers a standardized interface to assess and protect large language models with ease. [jiwer](https://github.com/jitsi/jiwer) reports 917 GitHub stars, 107 forks, and 19 open issues, last pushed Apr 16, 2026. [langevals](https://langwatch.ai/) has 72 stars, 9 forks, and 18 open issues, last pushed Feb 15, 2026. Figures are from public GitHub metadata via [jiwer's repository](https://github.com/jitsi/jiwer) and [langevals's repository](https://github.com/langwatch/langevals). | | [jiwer](/tools/jitsi-jiwer.md) | [langevals](/tools/langwatch-langevals.md) | | --- | --- | --- | | Tagline | Evaluate speech-to-text systems with word error rate (WER) measures | Provides a platform for evaluating and benchmarking LLM models using various evaluators | | Stars | 917 | 72 | | Forks | 107 | 9 | | Open issues | 19 | 18 | | Language | Python | - | | Adopt for | A Python library for assessing speech-to-text systems with word error rate measures. | LangEvals is an amalgamation platform for various language model evaluators under one umbrella. This tool offers a standardized interface to assess and protect large language models with ease. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | - | | Categories | Evaluation & Observability | Evaluation & Observability | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [jiwer](/tools/jitsi-jiwer.md) | [langevals](/tools/langwatch-langevals.md) | | --- | --- | --- | | Days since push | 105d | 174d | | Open issues (now) | 19 | 18 | | Full report | [trust report](/tools/jitsi-jiwer/trust.md) | [trust report](/tools/langwatch-langevals/trust.md) | ## Decision facts: jiwer - **Adopt for:** A Python library for assessing speech-to-text systems with word error rate measures. ## Decision facts: langevals - **Pricing:** unknown - **Adopt for:** LangEvals is an amalgamation platform for various language model evaluators under one umbrella. This tool offers a standardized interface to assess and protect large language models with ease. ## Choose when ### Choose jiwer if… - Tags unique to jiwer: automatic-speech-recognition, evaluation-metrics, python3, speech-to-text. - For accurate speech recognition evaluation needing direct WER calculations - More GitHub stars (917 vs 72) - visibility, not fit. ### Choose langevals if… - Tags unique to langevals: evaluation, guardrails, llm, openai. - When you need a singular point of access to multiple LLM evaluation tools - Leaner open-issue backlog (18). ## When NOT to use jiwer - Avoid if your project requires only basic, non-word level performance indicators - Not suitable for evaluating text-to-speech systems, as it focuses exclusively on speech-to-text output assessment ## When NOT to use langevals - If you prefer not having a dependency on LangEvals after it has been moved into the LangWatch monorepo, opting for directly managing individual evaluators could be a better option - When needing to customize evaluation processes extensively beyond what the provided standard interface allows ## Common questions ### What is the difference between jiwer and langevals? jiwer: Evaluate speech-to-text systems with word error rate (WER) measures. langevals: Provides a platform for evaluating and benchmarking LLM models using various evaluators. See the comparison table for live GitHub stats and shared categories. ### When should I choose jiwer over langevals? Choose jiwer over langevals when Tags unique to jiwer: automatic-speech-recognition, evaluation-metrics, python3, speech-to-text; For accurate speech recognition evaluation needing direct WER calculations; More GitHub stars (917 vs 72) - visibility, not fit. ### When should I choose langevals over jiwer? Choose langevals over jiwer when Tags unique to langevals: evaluation, guardrails, llm, openai; When you need a singular point of access to multiple LLM evaluation tools; Leaner open-issue backlog (18). ### When should I avoid jiwer? Avoid if your project requires only basic, non-word level performance indicators Not suitable for evaluating text-to-speech systems, as it focuses exclusively on speech-to-text output assessment ### When should I avoid langevals? If you prefer not having a dependency on LangEvals after it has been moved into the LangWatch monorepo, opting for directly managing individual evaluators could be a better option When needing to customize evaluation processes extensively beyond what the provided standard interface allows ### Is jiwer or langevals more popular on GitHub? jiwer has more GitHub stars (917 vs 72). Stars measure visibility, not whether either tool fits your constraints. ### Are jiwer and langevals open source? Yes - both are open-source projects on GitHub. ### Where can I find alternatives to jiwer or langevals? GraphCanon lists graph-backed alternatives at [jiwer alternatives](/tools/jitsi-jiwer/alternatives) and [langevals alternatives](/tools/langwatch-langevals/alternatives) ([jiwer markdown twin](/tools/jitsi-jiwer/alternatives.md), [langevals markdown twin](/tools/langwatch-langevals/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/jitsi-jiwer-vs-langwatch-langevals.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, jiwer or langevals? jiwer: Slowing. langevals: Slowing. 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 jiwer and langevals? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [jiwer trust report](/tools/jitsi-jiwer/trust); [langevals trust report](/tools/langwatch-langevals/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=jitsi-jiwer`](/api/graphcanon/graph?tool=jitsi-jiwer) - 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/_