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Fiddler

Cybersecurity & Identity Management fiddler.ai

Fiddler offers monitoring solutions for AI models, ensuring transparency, performance tracking, and bias detection throughout the model lifecycle.

Entry price

Free

Free plan available

Plans tracked

no add-ons

Pricing changes

Latest Wk 27 '26

Pricing model

Usage-based

Free tier available

Pricing Change History

7 changes

20267 changes

Jun 30, 2026

Improvement

Weekly

Fiddler tightens free-tier guardrail latency to under 80ms

Free plan guardrail latency specification improved from <100ms to <80ms, indicating faster real-time policy enforcement for the free tier.

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Jul 3, 2026

Improvement

Quarterly

Fiddler: Free plan guardrails latency improved <100ms → <80ms, models renamed to Centor

Free plan guardrails latency claim improved from <100ms to <80ms; underlying model line renamed from 'Fiddler Trust Models' to 'Fiddler Centor Models' (also renamed site-wide from 'Fiddler Trust Service').

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Apr 3, 2026

Packaging

Quarterly

Fiddler launches usage-based pricing at $0.002 per trace

Pricing completely overhauled: Free Guardrails/Lite/Business/Premium replaced by Free/Developer/Enterprise. Developer plan introduces usage-based pricing at $0.002/trace — first public price on the page.

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Apr 16, 2026

Packaging

Weekly

Fiddler launches Developer plan at $0.002/trace, cuts tiers from 4 to 3

Developer plan launched with transparent usage-based pricing at $0.002 per trace. No public pricing existed for any plan before this change. Pricing restructured from 4 tiers (Free Guardrails, Lite, Business, Premium) to 3 tiers (Free, Developer, Enterprise). Lite and Business plans removed; Developer plan added at $0.002/trace; Free Guardrails renamed to Free; Premium renamed to Enterprise.

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Jan 11, 2026

Packaging

Quarterly

Fiddler Introduces Free Guardrails Plan for Real-Time Moderation in GenAI Applications with Enhanced Trust Models

Free Guardrails plan introduced - real-time moderation for GenAI applications with contextual Fiddler Trust Models, protecting against hallucinations, toxicity, PII, prompt injection, and jailbreak attempts while maintaining <100ms latency

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Jan 11, 2026

Packaging

Quarterly

Fiddler Introduces Free Trial for Guardrails with New Promotional Banner

Fiddler Guardrails introduced with free trial offering - new promotional banner added: 'Try Fiddler Guardrails for free'

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Jan 11, 2026

Improvement

Quarterly

Fiddler Removes Key Features from Premium Plan, Including GPU Acceleration and Ongoing Co-Pilot Services

Business plan description changed from 'advanced explanations and transparency' to 'advanced ML and LLM monitoring' Premium plan: Removed 'GPU accelerated explanations' feature

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