--- title: "heron vs scalene" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/netis-heron-vs-plasma-umass-scalene" tools: ["netis-heron", "plasma-umass-scalene"] --- # heron vs scalene *GraphCanon updated Sep 30, 2026* ## Verdict Pick heron if an open-source network traffic analysis tool for monitoring the performance of LLMs and AI agents without requiring SDK changes; pick scalene if scalene is a high-performance CPU, GPU, and memory profiler for Python that uses AI to suggest optimizations. [heron](https://heron-ai.pages.dev) reports 101 GitHub stars, 10 forks, and 3 open issues, last pushed Aug 18, 2026. [scalene](https://github.com/plasma-umass/scalene) has 14k stars, 439 forks, and 155 open issues, last pushed Sep 27, 2026. Figures are from public GitHub metadata via [heron's repository](https://github.com/Netis/heron) and [scalene's repository](https://github.com/plasma-umass/scalene). | | [heron](/tools/netis-heron.md) | [scalene](/tools/plasma-umass-scalene.md) | | --- | --- | --- | | Tagline | Performance monitoring tool for LLM APIs and AI agents | High-performance CPU, GPU, and memory profiler for Python with AI-powered optimization | | Stars | 101 | 13,522 | | Forks | 10 | 439 | | Open issues | 3 | 155 | | Language | Rust | Python | | Adopt for | An open-source network traffic analysis tool for monitoring the performance of LLMs and AI agents without requiring SDK changes. | Scalene is a high-performance CPU, GPU, and memory profiler for Python that uses AI to suggest optimizations. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | Apache-2.0 | | Categories | Evaluation & Observability | Evaluation & Observability | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [heron](/tools/netis-heron.md) | [scalene](/tools/plasma-umass-scalene.md) | | --- | --- | --- | | Maintenance | Active (82%) | Very active (96%) | | Days since push | 23d | 2d | | Open issues (now) | 3 | 155 | | Stars delta | +27 (30d) | +37 (30d) | | Open issues delta | 0 (30d) | +4 (30d) | | Full report | [trust report](/tools/netis-heron/trust.md) | [trust report](/tools/plasma-umass-scalene/trust.md) | ## Decision facts: heron - **Adopt for:** An open-source network traffic analysis tool for monitoring the performance of LLMs and AI agents without requiring SDK changes. - **License detail:** Apache-2.0 ## Decision facts: scalene - **Adopt for:** Scalene is a high-performance CPU, GPU, and memory profiler for Python that uses AI to suggest optimizations. ## Choose when ### Choose heron if… - heron is primarily Rust; scalene is Python. - Tags unique to heron: agentic-ai, ai-agent-development, libpcap, llm-monitoring. - When you need a provider-side solution that does not require altering existing codebases or SDKs to monitor performance metrics. ### Choose scalene if… - scalene is primarily Python; heron is Rust. - Tags unique to scalene: cpu-profiling, gpu-programming, memory-allocation, profiler. - When you need precise profiling of both CPU and GPU performance in Python applications ## When NOT to use heron - When the need is for an in-agent monitoring tool rather than a network packet-based solution, as Heron operates on traffic. - In environments where live capture requires administrative privileges that are not available to the user performing the installation. - For real-time performance insights without prior deployment because Heron involves a setup phase and typically uses pre-collected `.pcap` files. ## When NOT to use scalene - If your project does not involve Python, as Scalene is specific to this language - Avoid if your system lacks necessary dependencies like Visual C++ Redistributable on Windows ## Common questions ### What is the difference between heron and scalene? heron: Performance monitoring tool for LLM APIs and AI agents. scalene: High-performance CPU, GPU, and memory profiler for Python with AI-powered optimization. See the comparison table for live GitHub stats and shared categories. ### When should I choose heron over scalene? Choose heron over scalene when heron is primarily Rust; scalene is Python; Tags unique to heron: agentic-ai, ai-agent-development, libpcap, llm-monitoring; When you need a provider-side solution that does not require altering existing codebases or SDKs to monitor performance metrics. ### When should I choose scalene over heron? Choose scalene over heron when scalene is primarily Python; heron is Rust; Tags unique to scalene: cpu-profiling, gpu-programming, memory-allocation, profiler; When you need precise profiling of both CPU and GPU performance in Python applications. ### When should I avoid heron? When the need is for an in-agent monitoring tool rather than a network packet-based solution, as Heron operates on traffic. In environments where live capture requires administrative privileges that are not available to the user performing the installation. For real-time performance insights without prior deployment because Heron involves a setup phase and typically uses pre-collected `.pcap` files. ### When should I avoid scalene? If your project does not involve Python, as Scalene is specific to this language Avoid if your system lacks necessary dependencies like Visual C++ Redistributable on Windows ### Is heron or scalene more popular on GitHub? scalene has more GitHub stars (13,522 vs 101). Stars measure visibility, not whether either tool fits your constraints. ### Are heron and scalene open source? Yes - both are open-source projects on GitHub (heron: Apache-2.0, scalene: Apache-2.0). ### Where can I find alternatives to heron or scalene? GraphCanon lists graph-backed alternatives at [heron alternatives](/tools/netis-heron/alternatives) and [scalene alternatives](/tools/plasma-umass-scalene/alternatives) ([heron markdown twin](/tools/netis-heron/alternatives.md), [scalene markdown twin](/tools/plasma-umass-scalene/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/netis-heron-vs-plasma-umass-scalene.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, heron or scalene? heron: Active. scalene: Very active. 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 heron and scalene? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [heron trust report](/tools/netis-heron/trust); [scalene trust report](/tools/plasma-umass-scalene/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=netis-heron`](/api/graphcanon/graph?tool=netis-heron) - 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/_