Fiddler AI vs IsDown

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

IsDown

See full pricing history

USD · US · source: isdown.app

Plan	Pricing	Charged by	Offer type
Starter	USD 27 monthly · USD 22 / month with annual commitment $27/month or $22/month billed annually	Flat · published subscription	Standalone · Fixed
Pro	USD 49 monthly · USD 40 / month with annual commitment $49/month or $40/month billed annually	Flat · published subscription	Standalone · Fixed
Premium Highlighted	USD 99 monthly · USD 80 / month with annual commitment $99/month or $80/month billed annually	Flat · published subscription	Standalone · Fixed
Business	USD 179 monthly · USD 150 / month with annual commitment $179/month or $150/month billed annually	Flat · published subscription	Standalone · Fixed
MSP	USD 200 monthly $200/month	Flat · published subscription	Standalone · Fixed
Enterprise	Contact sales Custom	Flat · published subscription	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

IsDown

Starter

Official plan card Monitors: 15

Limited
Official plan card Boards and status pages: 1 each

Limited
Official plan card Admin users: 1

Limited

Pro

Official plan card Monitors: 30

Limited
Official plan card Boards and status pages: 2 each

Limited
Official plan card Admin users: 2

Limited

Premium

Official plan card Monitors: 70

Limited
Official plan card Boards and status pages: 5 each

Limited
Official plan card Admin users: 5

Limited

Business

Official plan card Monitors: 150

Limited
Official plan card Boards and status pages: Unlimited

Limited
Official plan card Admin users: 15

Limited

MSP

Official plan card Monitors: 200

Limited
Official plan card Boards and status pages: 10 each

Limited
Official plan card Multi-client super-admin view: Included

Enterprise

Official plan card Monitors and users: Custom

Limited
Official plan card All integrations and custom integrations: Included
Official plan card Dedicated account manager: 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

IsDown

August 27, 2026 Source
- Starter: USD 27 monthly · USD 22 / month with annual commitment
- Pro: USD 49 monthly · USD 40 / month with annual commitment
- Premium: USD 99 monthly · USD 80 / month with annual commitment
- Business: USD 179 monthly · USD 150 / month with annual commitment
- MSP: USD 200 monthly
- Enterprise: Contact sales