Best Model Monitoring Software in 2026
Updated
In short: Evidently AI is ranked #1 of 24 as of 3 October 2026, ahead of W&B Weave and Opik. 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.
Keeping tabs on deployed models means looking at behavior, data, and performance—not just one signal. Compare drift detection, bias monitoring, data quality monitoring, and performance monitoring, then consider deployment options and monitored model limit for operational fit. Free-plan availability and “Paid from” pricing give you cost details to weigh alongside those capabilities. W&B Weave and Opik lead the entries, with Evidently AI and Arize AX also among the first options. Use the listed comparisons to focus on the monitoring areas and deployment arrangements that matter for your models.
24 model monitoring software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Evidently AI Top pick · 7.9 Free plan · $80/mo
#2 W&B Weave Runner-up · 7.9 Free plan · $60/mo
#3 Opik Also great · 7.6 Free plan · $19/mo
- Free planFree trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial$80/mofirst paid tier About Evidently AIVisit site - Free planFree trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Paid from
- 60 /mo
RecognisedDocumentedPlatformsFree planFree trial$60/mofirst paid tier About W&B WeaveVisit site - Free planFree trial apiLinuxself-hostedWeb
- Free plan
- Yes
- Paid from
- 19 /mo
RecognisedDocumentedPlatformsFree planFree trial$19/mofirst paid tier About OpikVisit site - Free planFree trial apiLinuxself-hostedWeb
- Free plan
- Yes
- Paid from
- 99 /mo
RecognisedDocumentedPlatformsFree planFree trial$399/mofirst paid tier About NannyMLVisit site - Free planFree trial apiLinuxself-hostedWeb
- Free plan
- Yes
- Bias monitoring
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free planFree trial apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 88 /mo
- Drift detection
- Yes
- Performance monitoring
- Yes
- Data quality monitoring
- Yes
RecognisedDocumentedPlatformsFree planFree trial$79/mofirst paid tier About Qualdo-MQXVisit site - Free planFree trial apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 79 /mo
RecognisedDocumentedPlatformsFree planFree trial$79/mofirst paid tier About HeliconeVisit site - Free planFree trial apiself-hostedWeb
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial$29/mofirst paid tier About Maxim AIVisit site - Free trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- No
- Paid from
- 10 /mo
- Bias monitoring
- Yes
RecognisedDocumentedPlatformsFree planFree trial$10/mofirst paid tier About SUPERWISEVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 60 /mo
- Bias monitoring
- Yes
RecognisedDocumentedPlatformsFree planFree trial$60/mofirst paid tier About ArthurVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 249 /mo
RecognisedDocumentedPlatformsFree planFree trial$249/mofirst paid tier About BraintrustVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 100 /mo
RecognisedDocumentedPlatformsFree planFree trial$100/mofirst paid tier About GalileoVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 30 /mo
- Performance monitoring
- Yes
RecognisedDocumentedPlatformsFree planFree trial$30/mofirst paid tier About LaminarVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 29 /mo
RecognisedDocumentedPlatformsFree planFree trial$29/mofirst paid tier About LangfuseVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 50 /mo
RecognisedDocumentedPlatformsFree planFree trial$50/mofirst paid tier About Arize AXVisit site - Web
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Web
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - WebLinux
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Web
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Web
- Performance monitoring
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Web
- Free plan
- No
RecognisedDocumentedPlatformsFree planFree trial - Web
- Free plan
- Yes
RecognisedDocumentedPlatformsFree planFree trial - RecognisedDocumentedPlatformsFree planFree trial
Is your tool 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 Specifiction?
Evidently AI is ranked #1 of 24 with a score of 7.9. W&B Weave is second and Opik third.
How many of these have a free plan?
15 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 on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing. Paid placements never change a rank.