Fiddler Introduces Free Guardrails Plan for Real-Time Moderation in GenAI Applications with Enhanced Trust Models
What happened
Between the Jul 6, 2025 and Oct 4, 2025 captures of Fiddler's pricing page, Pulse recorded one change: 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. Pulse files it as a packaging change (new plan) with an upward direction. Pulse's latest capture (Jul 6, 2026) lists Developer at $0 per trace.
Fiddler's previous recorded change was "Fiddler Introduces Free Trial for Guardrails with New Promotional Banner" (Q1 2025). Before that Pulse recorded "Fiddler Removes Key Features from Premium Plan, Including GPU Acceleration and Ongoing Co-Pilot Services" (Q3 2024). 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.
- Free Guardrails · PlanAdded
BeforeNo - real-time moderation
After- real-time moderation
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| Free Guardrails | Plan | No - real-time moderation | - real-time moderation | Added |
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 Jul 6, 2025 and Oct 4, 2025; the change is marked near the top of the page, where - real-time moderation now appears.
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The two full-page captures with this change marked up are free with an account.
Fiddler, pricing history
Full history- Jul 3, 2026improvedFiddler: Free plan guardrails latency improved <100ms → <80ms, models renamed to Centor
- 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 · this change
- 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- PostmanJan 12Postman Consolidates Enterprise Plans into Single Tier at $49/User/Month, Streamlining Pricing Structure for Enhanced User Experience
- PostmanJan 12Postman Introduces AI Credits in Professional and Basic Plans, Enhancing Value with 400 Credits/User/Month as Standard Feature
- PostmanJan 12Postman Introduces Unlimited APIs for Enterprise Plan with New Spec Hub Features
- PostmanJan 12Postman Democratizes Cloud-Based Integrations for All Users with Free Plan Access to Slack and Teams
Questions about this change
Did Fiddler raise prices in October 2025?
No list-price increase was recorded between Jul 6, 2025 and Oct 4, 2025. The change Pulse detected was a packaging change: new plan.
What changed on Fiddler's pricing page between Jul 6, 2025 and Oct 4, 2025?
Free Guardrails plan: No - real-time moderation → - real-time moderation, added. Pulse compared the captures it took on Jul 6, 2025 and Oct 4, 2025; the before/after table above lists each item as written on the page.
How often does Fiddler change its pricing?
Pulse recorded 0 other pricing-page changes for Fiddler in the 90 days before this one; the previous change was "Fiddler Introduces Free Trial for Guardrails with New Promotional Banner" in Q1 2025; Fiddler has been tracked since 2023-11-14.