Fiddler AI vs TrackJS

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

Fiddler AI

See full pricing history

USD · US · source: www.fiddler.ai

Plan	Pricing	Charged by	Offer type
Free — Free	Free Free	Flat	Standalone · Free
Developer — Developer Highlighted	$0.002 per trace $0.002 per trace	Usage · per trace	Standalone · Usage based

TrackJS

See full pricing history

USD · US · source: trackjs.com

Plan	Pricing	Charged by	Offer type
Starter	USD 49 monthly · USD 45 / month with annual commitment $49/month or $45/month billed yearly	Flat · per month	Standalone · Fixed
Professional Highlighted	USD 99 monthly · USD 91 / month with annual commitment $99/month or $91/month billed yearly	Flat · per month	Standalone · Fixed
Business	USD 199 monthly · USD 183 / month with annual commitment $199/month or $183/month billed yearly	Flat · per month	Standalone · Fixed

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

Fiddler AI

Free — Free

Highlights Real-time guardrails to detect harmful exposure: Included
Highlights Protects against hallucinations, Toxicity, PII/PHI, Prompt Injection, and Jailbreak attempts: Included
Highlights Latency of <80ms: Included
Highlights Powered by contextual and task specific Fiddler Centor Models: Included

Developer — Developer

Highlights Everything in Free, plus: Included
Highlights Unified AI observability, including tests and experiments, for agentic and predictive systems: Included
Highlights Custom evaluators and bring your own judge: Included
Highlights Visualization-driven insights: Included
Highlights Role based access control and SSO: Included
Highlights SaaS deployment: Included

TrackJS

Starter

Plan card Monthly page views: 100,000

Included
Plan card Applications: 1

Included
Plan card Retention: 10 days

Included

Professional

Plan card Monthly page views: 1 million

Included
Plan card Applications: 5

Included
Plan card Retention: 15 days

Included

Business

Plan card Monthly page views: 5 million+

Included
Plan card Applications: 10

Included
Plan card Retention: 30 days

Included

How their prices changed

Each dated row shows the public prices observed when that vendor’s pricing page changed.

Fiddler AI

August 27, 2026 Source
- Free — Free: Free
- Developer — Developer: $0.002 per trace

TrackJS

August 27, 2026 Source
- Starter: USD 49 monthly · USD 45 / month with annual commitment
- Professional: USD 99 monthly · USD 91 / month with annual commitment
- Business: USD 199 monthly · USD 183 / month with annual commitment