Fiddler: Free plan guardrails latency improved <100ms → <80ms, models renamed to Centor
What happened
Between the Mar 30, 2026 and Jun 30, 2026 captures of Fiddler's pricing page, Pulse recorded one change: Free plan guardrails latency claim improved from <100ms to <80ms; underlying model line renamed from Fiddler Trust Models/Trust Service to Fiddler Centor Models. In detail: 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'). Pulse files it as a product change (feature change) with a neutral direction. Pulse's latest capture (Jul 6, 2026) lists Developer at $0 per trace.
It lands 91 days after Fiddler's previous change, "Fiddler launches usage-based pricing at $0.002 per trace" (Apr 3, 2026). Before that Pulse recorded "Fiddler launches Developer plan at $0.002/trace, cuts tiers from 4 to 3" (Week 5, 2026), "Fiddler Introduces Free Guardrails Plan for Real-Time Moderation in GenAI Applications with Enhanced Trust Models" (Q3 2025) and "Fiddler Introduces Free Trial for Guardrails with New Promotional Banner" (Q1 2025). Fiddler has been tracked since 2023-11-14.
In the same window Postman also changed their Cybersecurity & Identity Management pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- — · FeatureRewordedFiddler Trust ModelsFiddler Centor Models
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| — | Feature | Fiddler Trust Models | Fiddler Centor Models | Reworded |
Values as written on Fiddler's public pricing page in the two captures Pulse compared; where the page states no number, the cells give the wording before and after.
Evidence
The two captures Pulse comparedFull-page captures of Fiddler's pricing page (fiddler.ai) from Mar 30, 2026 and Jun 30, 2026; the change is marked around the middle of the page, where "Fiddler Trust Models" becomes "Fiddler Centor Models".
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Fiddler, pricing history
Full history- Jun 30, 2026improvedFiddler tightens free-tier guardrail latency to under 80ms
- Jul 3, 2026improvedFiddler: Free plan guardrails latency improved <100ms → <80ms, models renamed to Centor · this change
- Apr 3, 2026packagingFiddler launches usage-based pricing at $0.002 per trace
- Week 5, 2026packagingFiddler launches Developer plan at $0.002/trace, cuts tiers from 4 to 3
- Q3 2025packagingFiddler Introduces Free Guardrails Plan for Real-Time Moderation in GenAI Applications with Enhanced Trust Models
- Q1 2025packagingFiddler Introduces Free Trial for Guardrails with New Promotional Banner
- Q3 2024improvedFiddler Removes Key Features from Premium Plan, Including GPU Acceleration and Ongoing Co-Pilot Services
Across Cybersecurity & Identity Management in the same window
All Cybersecurity & Identity Management changes- PostmanApr 6Postman drops AI and API Builder add-ons, launches SSO and Premium Support
- PostmanOct 29Postman cuts SDK generation from Team plan, leaving it to Enterprise
- PostmanSep 28Postman: Context Graph usage add-on introduced
- PostmanSep 23Postman adds free Context Graph tracking, metered API query overages
- PostmanSep 21Postman hides $49/user Enterprise price behind Contact Sales, drops AWS buy
Questions about this change
Did Fiddler raise prices in June 2026?
No list-price increase was recorded between Mar 30, 2026 and Jun 30, 2026. The change Pulse detected was a product change: feature change.
What changed on Fiddler's pricing page between Mar 30, 2026 and Jun 30, 2026?
Feature: Fiddler Trust Models → Fiddler Centor Models, reworded. Pulse compared the captures it took on Mar 30, 2026 and Jun 30, 2026; the before/after table above lists each item as written on the page.
How often does Fiddler change its pricing?
Pulse recorded 1 other pricing-page change for Fiddler in the 90 days before this one; the previous change was "Fiddler launches usage-based pricing at $0.002 per trace" on Apr 3, 2026; Fiddler has been tracked since 2023-11-14.