Best Model Monitoring Software in 2026
Updated
In short: Arize AX is ranked #1 of 24 as of 4 October 2026, ahead of W&B Weave and Langfuse. The best-ranked option with a free plan is W&B Weave. The lowest first paid tier on this page is SUPERWISE at $10/mo.
Model monitoring software is for keeping watch on models and the signals associated with their operation. Compare drift detection, bias monitoring, data quality monitoring, and performance monitoring to see which areas are covered in the listed capabilities. Deployment options and monitored model limits add operational considerations, while free-plan availability and paid-from pricing provide cost context. The entries include Arize AX, W&B Weave, and Langfuse, as well as Opik and Helicone. Consider which kinds of changes or issues matter for the models you support, and weigh those needs against the monitoring and deployment details provided.
24 model monitoring software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Arize AX No phone app RecognisedPhone appDocumentedFree plan 8.2$50/mo
- 2 W&B Weave No phone app RecognisedPhone appDocumentedFree plan 8.0$60/mo
- 3 Langfuse No phone app RecognisedPhone appDocumentedFree plan 8.0$29/mo
- 4 Opik No phone app RecognisedPhone appDocumentedFree plan 7.9$19/mo
- 5 Helicone No phone app RecognisedPhone appDocumentedFree plan 7.4$79/mo
- 6 OpenLIT No phone app RecognisedPhone appDocumentedFree plan 7.3Free
- 7 Evidently AI No phone app RecognisedPhone appDocumentedFree plan 7.3$80/mo
- 8 Braintrust No phone app RecognisedPhone appDocumentedFree plan 7.1$249/mo
- 9 Galileo No phone app RecognisedPhone appDocumentedFree plan 7.1$100/mo
- 10 Maxim AI No phone app RecognisedPhone appDocumentedFree plan 7.0$29/mo
- 11 Laminar No phone app RecognisedPhone appDocumentedFree plan 6.9$30/mo Performance monitoring: Yes
- 12 Arize Phoenix No phone app RecognisedPhone appDocumentedFree plan 6.7
- 13 LangSmith No phone app RecognisedPhone appDocumentedFree plan 6.6
- 14 Arthur No phone app RecognisedPhone appDocumentedFree plan 6.6$60/mo Bias monitoring: Yes
- 15 HoneyHive No phone app RecognisedPhone appDocumentedFree plan 6.4
- 16 Deepchecks No phone app RecognisedPhone appDocumentedFree plan 6.4Free Bias monitoring: Yes
- 17 LangWatch No phone app RecognisedPhone appDocumentedFree plan 6.3€29/mo
- 18 NannyML No phone app RecognisedPhone appDocumentedFree plan 6.3$399/mo
- 19 Qualdo-MQX No phone app RecognisedPhone appDocumentedFree plan 6.3$79/mo Drift detection: YesPerformance monitoring: Yes
- 20 Fiddler AI No phone app RecognisedPhone appDocumentedFree plan 5.6
- 21 SUPERWISE No phone app RecognisedPhone appDocumentedFree plan 5.6$10/mo Bias monitoring: Yes
- 22 Memoturn No phone app RecognisedPhone appDocumentedFree plan 5.4 Performance monitoring: Yes
- 23 Pulsar No phone app RecognisedPhone appDocumentedFree plan 5.4
- 24 Lunary No phone app RecognisedPhone appDocumentedFree plan 4.5
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which model monitoring software is ranked first on Samsung Mobile US Press?
Arize AX is ranked #1 of 24 with a score of 8.2. W&B Weave is second and Langfuse third.
How many of these have a free plan?
16 of the 24 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, SUPERWISE has the lowest first paid tier we found: $10/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.