Fiddler AI vs OnlineOrNot

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

OnlineOrNot

See full pricing history

USD · US · source: onlineornot.com

Plan	Pricing	Charged by	Offer type
Hobby	Free Free	Flat · published offer	Standalone · Free
Pro	USD 15 monthly From $15/month	Flat · published offer	Standalone · Starting at
Enterprise	Contact sales Custom	Flat · published offer	Standalone · Contact sales

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

OnlineOrNot

Hobby

Plan card Users: 2

Limited
Plan card Uptime monitors: 3

Limited
Plan card Check interval: 3 minutes

Limited

Pro

Plan card Users: Unlimited

Limited
Plan card Monitors: 10 included

Limited
Plan card Browser runs: 3,000

Limited

Enterprise

Plan card Custom inclusions: 0

Limited
Plan card Dedicated support: 1

Limited
Plan card SLA: 2

Limited

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

OnlineOrNot

August 27, 2026 Source
- Hobby: Free
- Pro: USD 15 monthly
- Enterprise: Contact sales