Data month 2026-10
Best AI Observability & Eval Tools
As of October 2026, AlphaMoat tracks 374 AI websites tagged AI Observability & Eval. The most visited is Arena with 36.2M monthly visits (+19.1% MoM). Ranked by latest monthly traffic, updated monthly.
| # | Product | Company | Industry | Visits | MoM |
|---|---|---|---|---|---|
| 1 |  A public evaluation platform comparing AI models through real tasks and community votes. | LMArena | News & Analytics | 36.2M | +19.1% |
| 2 |  An independent benchmarking platform for models, agents, and inference providers | Artificial Analysis | General AI | 11.2M | +9% |
| 3 |  AI observability and security platform for any tech stack. | Datadog | Programming | 5.2M | -4.8% |
| 4 |  Diagnoses product issues, fixes errors, and generates code changes automatically | PostHog | Programming | 4.5M | +25.1% |
| 5 |  Help development teams find errors and monitor application performance. | Sentry | Programming | 3.0M | +2% |
| 6 |  A training-data platform combining human expertise and technology for agents and LLMs. | Toloka | General AI | 2.3M | +1.6% |
| 7 |  An independent AI model leaderboard comparing GPT, Claude, Gemini, Llama and more on a single page | LLM Stats | General AI | 1.2M | -4.9% |
| 8 |  TrueWatch unifies application, infrastructure, log and AI-workload telemetry on one platform, with Toby AI agents that detect, diagnose and recommend fixes | TrueWatch | General AI | 1.1M | +14.9% |
| 9 |  An AI DevOps platform spanning delivery, testing, security, and cost optimization | Harness | Programming | 1.1M | -5% |
| 10 |  A cloud platform unifying metrics, logs, and traces with troubleshooting aid. | Grafana | Programming | 1.1M | -8.3% |
| 11 |  A production-ready OpenAI-compatible AI gateway that unifies multi-model routing. | OrcaRouter | General AI | 975.3K | -5.2% |
| 12 |  A competitive platform for generating and comparing designs from several AI models | Design Arena | General AI | 949.5K | -13.2% |
| 13 |  Researching the capabilities of intelligent compute models and industry development trends. | Epoch AI | News & Analytics | 702.6K | +4% |
| 14 |  An AI SRE unifying incident response, on-call, and log-metric tracking. | Better Stack | Programming | 621.7K | +4% |
| 15 |  Provides training data, evaluation, and full-stack tech to build reliable intelligent systems | Scale | General AI | 616.9K | +12.5% |
| 16 |  A radar station aggregating crowdsourced test data and community experience for Codex and other AI coding accounts | CodexRadar | General AI | 605.1K | -31.5% |
| 17 |  Open-source tracing, evaluation, and continuous improvement for production AI agents. | Langfuse | General AI | 586.0K | -18.9% |
| 18 |  Independently assessing frontier AI capability risk and real-work impact | METR | General AI | 553.8K | -46% |
| 19 |  Independent AI evaluation benchmark platform | Vals | General AI | 454.0K | +8.5% |
| 20 |  End-to-end AI engineering stack for production-grade agents. | Pydantic | Programming | 356.6K | -13.6% |
| 21 |  Track, visualize, and improve machine-learning experiment workflows | Weights & Biases | General AI | 315.6K | -80.2% |
| 22 |  Continuously track, evaluate and experiment to improve AI agents in production. | Arize AI | General AI | 249.0K | +3.2% |
| 23 |  Track evaluations in real time and locate AI agent regression issues. | Braintrust | General AI | 240.2K | +0.5% |
| 24 |  AI gateway reaching 600+ models through one compatible endpoint | Requesty | General AI | 239.4K | -28.1% |
| 25 |  A tool that sends one prompt to 25 models for consensus comparison. | PromptQuorum | General AI | 238.5K | -0.6% |
| 26 |  Track, evaluate, debug and improve AI apps and agents | Comet ML | General AI | 233.0K | -13.1% |
| 27 |  Provide gateway, routing, logging and prompt management for generative AI apps. | Portkey | General AI | 195.7K | -9.4% |
| 28 |  Incubate open, accessible, and scalable large-model systems. | LMSYS | General AI | 193.8K | -21.1% |
| 29 |  A platform that gathers real human feedback and continuously evaluates voice and conversation AI. | Hume AI | Audio | 188.0K | -14.8% |
| 30 |  Quantify individuals' and teams' AI coding activity and cost | WakaTime | Programming | 186.9K | -8.6% |
| 31 |  Caveman is a toolkit that cuts AI agent token costs through routing, caching and tracing. | Caveman Labs | General AI | 171.8K | -15.5% |
| 32 |  Discover real-time attack signals across networks, identity, cloud, and AI environments | Vectra | Programming | 150.4K | -1.1% |
| 33 |  Open-source platform to manage, evaluate, and monitor agents, LLMs, and ML. | MLflow | General AI | 148.0K | -24.7% |
| 34 |  Data development and evaluation infrastructure for frontier LLMs. | Snorkel AI | General AI | 143.7K | -21.3% |
| 35 |  Open-source labeling for multimodal training data, agent traces, and LLM evaluation. | HumanSignal | General AI | 137.2K | -16.1% |
| 36 |  Enterprise-grade AI data and implementation services covering multimodal collection, labeling, and evaluation. | YPAI | General AI | 135.7K | +73.5% |
| 37 |  Simulate, evaluate, monitor and improve AI agents in production | Future AGI | General AI | 121.7K | -7.8% |
| 38 |  Simulate, evaluate and observe generative AI agents in real time | H3 Labs | General AI | 121.4K | +10% |
| 39 |  A multimodal data curation platform for physical AI | Voxel51 | General AI | 117.7K | -8.2% |
| 40 |  Open-source evaluation and monitoring for LLM retrieval and machine learning systems | Evidently AI | General AI | 116.5K | -22.3% |
| 41 |  Open-source evaluation and red-teaming for LLM apps and agents | Promptfoo | General AI | 107.8K | -20.8% |
| 42 |  An AI observability and evaluation engineering platform. | Galileo | General AI | 107.7K | -23.6% |
| 43 |  Observe, evaluate, and manage production AI models and prompts. | Keywords AI | General AI | 91.5K | -14.5% |
| 44 |  EU-hosted unified AI agent gateway across models | Opper | General AI | 86.9K | +7.4% |
| 45 |  Log, evaluate, and manage LLM prompt versions | PromptLayer | General AI | 85.9K | -4.6% |
| 46 |  A dynamic simulation platform for training and evaluating AI agents. | Meta | General AI | 84.7K | +30.1% |
| 47 |  Unifies LLM evaluation, tracing, and production observability for enterprises. | Confident AI | General AI | 83.4K | -3.3% |
| 48 |  A platform providing data and environments for model training, evaluation, and agent deployment | Deccan AI | Programming | 73.4K | +128.6% |
| 49 |  An automated testing platform for voice and conversation agents. | Cekura | General AI | 73.2K | -18.9% |
| 50 |  Sovereign-grade AI gateway and agent platform. | Orq.ai | General AI | 71.8K | +1% |
Related tags
FAQ
AI Observability & Eval websites: which ranks #1?
In October 2026, Arena (36.2M monthly visits) ranks #1 by monthly visits, followed by Artificial Analysis (11.2M monthly visits) and Datadog (5.2M monthly visits).
AI Observability & Eval websites: what are the top 10?
Ranked by monthly visits, the top 10 are: 1. Arena, 2. Artificial Analysis, 3. Datadog, 4. PostHog, 5. Sentry, 6. Toloka, 7. LLM Stats, 8. TrueWatch, 9. Harness, 10. Grafana Labs.
AI Observability & Eval websites: which is growing fastest?
Among the top 20 by monthly visits, PostHog grew fastest month over month (+25.1%); METR declined the most (-46%).
How many AI Observability & Eval websites does AlphaMoat track, and where does the data come from?
AlphaMoat tracks 374 AI Observability & Eval websites, ranked by monthly visits. Visits are third-party traffic estimates aggregated monthly, with multiple domains of the same product merged. Updated monthly; the current data is for October 2026.
Data month: 2026-10 · Visit figures are third-party traffic estimates aggregated monthly — best for scale and trends. Multiple domains of the same product are merged. See methodology.