vendor · observability
Fiddler AI vs Langfuse
49 fields both were evaluated on, 29 of them different — including where one discloses something the other does not. Every value links to the document it came from. 20 further fields are disclosed by neither and are listed at the end rather than tabled.
Assurance
| Field | Fiddler AI | Langfuse |
|---|---|---|
| Audit trail· | Every enforcement decision is recorded with who triggered it and what happened, giving you audit evidence ready for GRC standards and AI regulations. “Auditable Governance Every enforcement decision is recorded with who triggered it and what happened, giving you audit evidence ready for GRC standards and AI regulations.”www.fiddler.ai · checked Aug 6, 2026 | “Hierarchical traces capture every LLM call, tool invocation, and retrieval step.”langfuse.com · checked Aug 11, 2026 |
| Explainability· | See every action, token, and dollar by user and team for fleet-wide intelligence “See the performance of all your agents in a single pane of glass. See every action, token, and dollar by user and team for fleet-wide intelligence”www.fiddler.ai · checked Aug 6, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Runtime governance· | Fiddler Guardrails enforce policy inline, at the agent's request and response path, in under 80ms, so violations are stopped before data ever leaves your network “Fiddler Guardrails enforce policy inline, at the agent's request and response path, in under 80ms, so violations are stopped before data ever leaves your network, not flagged after the fact.”www.fiddler.ai · checked Aug 6, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Permission scopes· | no public information www.fiddler.ai · checked Aug 6, 2026 | Data is scoped per-project with project-scoped API keys, and requests are authorized via role-based access control before queries run. “All product data is scoped to a project. Every record is associated with a projectId , API keys are project-scoped, and authenticated requests are authorized through RBAC before queries are made”langfuse.com · checked Sep 2, 2026 |
| Compliance certifications· | Fiddler states it complies with HIPAA “Fiddler is in compliance with the U.S. Health Insurance and Accountability Act (HIPAA)”www.fiddler.ai · checked Aug 26, 2026 | SOC 2 Type II, ISO 27001, EU & US data regions, a HIPAA-ready region, GDPR; government hardening described as coming soon “SOC 2 Type II & ISO 27001 EU & US Data Regions HIPAA-ready region Hardening for Gov (soon) GDPR”langfuse.com · checked Sep 12, 2026 |
| Regulatory alignment· | audit evidence ready for GRC standards and AI regulations “Auditable Governance Every enforcement decision is recorded with who triggered it and what happened, giving you audit evidence ready for GRC standards and AI regulations.”www.fiddler.ai · checked Aug 6, 2026 | Langfuse states it is GDPR compliant with data retention, masking and deletion capabilities “Langfuse is GDPR compliant, and offers data retention, data masking and data deletion capabilities to manage the processing of personal data”langfuse.com · checked Aug 26, 2026 |
| SLA terms· | no public information www.fiddler.ai · checked Aug 6, 2026 | |
| Self-reported performance· | no public information www.fiddler.ai · checked Aug 16, 2026 | Vendor claims Langfuse v4 delivers up to 165x faster performance (self-reported). “Langfuse v4 is here: real-time, up to 165× faster”langfuse.com · checked Aug 10, 2026 |
| Service type· | no public information www.fiddler.ai · checked Aug 6, 2026 | |
| Client types· | software and AI engineers, data scientists, platform and DevOps teams, and security and compliance teams “Who uses Fiddler AI? Fiddler AI is used by organizations deploying agents across all industries, as well as highly regulated industries like financial services , healthcare , insurance , and government . Within these organizations, the typical users are software and AI engineers, data scientists, platform and DevOps teams, and security and compliance teams responsible for keeping agents and predictive models accurate, safe, and compliant across their lifecycle.”www.fiddler.ai · checked Aug 6, 2026 |
Safety
| Field | Fiddler AI | Langfuse |
|---|---|---|
| Incident reporting· | no public information www.fiddler.ai · checked Aug 6, 2026 | Vulnerability disclosure runs through Bugcrowd, plus a whistleblowing channel. “Reporting: Clear channels for responsible disclosure through Bugcrowd and Whistleblowing”langfuse.com · checked Sep 2, 2026 |
| Third-party evaluations· | no public information www.fiddler.ai · checked Aug 6, 2026 | Undergoes annual third-party penetration testing in addition to its SOC 2 Type II and ISO 27001 audits. “is covered by SOC 2 Type II and ISO 27001 audits, and undergoes annual third-party penetration tests”langfuse.com · checked Sep 2, 2026 |
| Data handling· | Langfuse states it is GDPR compliant with data retention, masking and deletion capabilities “Langfuse is GDPR compliant, and offers data retention, data masking and data deletion capabilities to manage the processing of personal data”langfuse.com · checked Aug 26, 2026 |
Practicality
| Field | Fiddler AI | Langfuse |
|---|---|---|
| Pricing model· | usage-based at $0.002 per trace “We offer three plans, and we work with customers to find the right fit based on their specific use cases and needs, rather than a one-size-fits-all package. The Free plan includes real-time guardrails powered by Fiddler Centor Models at under 80ms latency , protecting against hallucinations, toxicity, PII/PHI, prompt injection, and jailbreak attempts. The Developer plan is usage-based at $0.002 per trace and adds unified observability for agentic and predictive systems, custom evaluators, and SSO. The Enterprise plan adds enterprise-grade guardrails, flexible deployment (SaaS, VPC, or on-premises), infrastructure scalability, and white-glove support with a named Customer Success Manager and customized onboarding.”www.fiddler.ai · checked Aug 6, 2026 | Usage-based free tier (50k observations/month) with no credit card required; paid tiers not detailed on this page “Free tier: 50k observations/month . No credit card required.”langfuse.com · checked Aug 11, 2026 |
| Price point· | $0.002 per trace “The Developer plan is usage-based at $0.002 per trace”www.fiddler.ai · checked Aug 6, 2026 | Free tier: 50k observations/month, no credit card required “Free tier: 50k observations/month . No credit card required.”langfuse.com · checked Aug 11, 2026 |
| Availability· | Free plan, Developer plan, Enterprise plan “We offer three plans, and we work with customers to find the right fit based on their specific use cases and needs, rather than a one-size-fits-all package. The Free plan includes real-time guardrails powered by Fiddler Centor Models at under 80ms latency , protecting against hallucinations, toxicity, PII/PHI, prompt injection, and jailbreak attempts. The Developer plan is usage-based at $0.002 per trace and adds unified observability for agentic and predictive systems, custom evaluators, and SSO. The Enterprise plan adds enterprise-grade guardrails, flexible deployment (SaaS, VPC, or on-premises), infrastructure scalability, and white-glove support with a named Customer Success Manager and customized onboarding.”www.fiddler.ai · checked Aug 6, 2026 | Generally available: a fully managed multi-tenant cloud service, actively used at scale. “Langfuse Cloud is a fully managed, multi-tenant SaaS deployment”langfuse.com · checked Sep 2, 2026 |
| Deployment options· | SaaS, VPC, or on-premises “The Enterprise plan adds enterprise-grade guardrails, flexible deployment (SaaS, VPC, or on-premises), infrastructure scalability, and white-glove support with a named Customer Success Manager and customized onboarding.”www.fiddler.ai · checked Aug 6, 2026 | Self-hosts at scale via Docker Compose, Kubernetes (Helm), or Terraform on AWS/GCP/Azure “Self-host at scale Docker Compose Kubernetes (Helm) AWS (Terraform) GCP (Terraform) Azure (Terraform)”langfuse.com · checked Aug 11, 2026 |
| Integrations· | Azure OpenAI, Amazon Bedrock, LangGraph, and 100+ other providers “Fiddler is model- and cloud-agnostic, working across Azure OpenAI, Amazon Bedrock, LangGraph, and 100+ other providers”www.fiddler.ai · checked Aug 6, 2026 | 100+ integrations across languages, agent frameworks, and model providers “Additionally, 100+ integrations make getting started even easier.”langfuse.com · checked Aug 11, 2026 |
| Supported regions· | AWS GovCloud “Built for the Enterprise and Government Security and scale in SaaS, VPC, and AWS GovCloud.”www.fiddler.ai · checked Aug 6, 2026 | EU and US data regions, with a HIPAA-ready region “EU & US Data Regions HIPAA-ready region”langfuse.com · checked Aug 11, 2026 |
| Support model· | White-glove support at every stage of your AI journey, backed by our engineering and data science expertise “Customer Centric White-glove support at every stage of your AI journey, backed by our engineering and data science expertise to align AI deployments with business outcomes.”www.fiddler.ai · checked Aug 6, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
Ecosystem
| Field | Fiddler AI | Langfuse |
|---|---|---|
| Protocols supported· | no public information www.fiddler.ai · checked Aug 6, 2026 | Ships a Platform MCP Server for IDE agents and is OpenTelemetry-native “Platform MCP Server Structured access for IDE agents to manage prompts, query traces, and use Langfuse data.”langfuse.com · checked Aug 11, 2026 |
| API access· | no public information www.fiddler.ai · checked Aug 6, 2026 | |
| Open source· | no public information www.fiddler.ai · checked Aug 6, 2026 | |
| Marketplace presence· | AWS Preferred Partner “AWS Preferred Partner Run Fiddler AI Observability securely within Amazon SageMaker Studio.”www.fiddler.ai · checked Aug 6, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
Impact
| Field | Fiddler AI | Langfuse |
|---|---|---|
| User base· | Fortune 100 organizations “Fortune 100 organizations use Fiddler to deliver high performance agentic and predictive applications, protect from costly risks, and maximize ROI.”www.fiddler.ai · checked Aug 6, 2026 | Used by 21 of Fortune 50; 90B+ observations/month; 100,000+ engineers building on Langfuse “Used by 21 of Fortune 50 90B+ observations/month 100,000+ engineers building on Langfuse”langfuse.com · checked Sep 3, 2026 |
| Deployment scale· | “Fortune 100 organizations use Fiddler to deliver high performance agentic and predictive applications, protect from costly risks, and maximize ROI.”www.fiddler.ai · checked Aug 6, 2026 | Processes over 90 billion observations per month, up from a previously reported 10+ billion. “90B+ observations/month”langfuse.com · checked Sep 3, 2026 |
| Target sectors· | financial services, healthcare, insurance, and government “Fiddler AI is used by organizations deploying agents across all industries, as well as highly regulated industries like financial services , healthcare , insurance , and government .”www.fiddler.ai · checked Aug 6, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| High-risk domains· | financial services, healthcare, insurance, and government “Fiddler AI is used by organizations deploying agents across all industries, as well as highly regulated industries like financial services , healthcare , insurance , and government .”www.fiddler.ai · checked Aug 6, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Market recognition· | no public information www.fiddler.ai · checked Aug 16, 2026 | Vendor states its platform is used by 21 of the Fortune 50 companies. “Used by 21 of Fortune 50”langfuse.com · checked Aug 10, 2026 |
Disclosed by neither
Both Fiddler AI and Langfuse publish nothing on these 20 fields. That is a finding about the category rather than a difference between them, so it is recorded here instead of as 20 identical table rows. Each is shown with its source check on the individual profiles.
- Documented incidents
- Safety evaluations
- Red teaming
- Safety policy
- Usage restrictions
- Model or system card
- Insurance available
- Own liability cover
- Insurance carriers
- Coverage limits
- Indemnification
- Liability cap
- Tamper-evident log
- Outcome-based pricing
- Settlement mechanism
- Asset custody
- Dispute process
- Evaluation coverage
- Regulatory status
- Underwriting backing
Questions
- How do Fiddler AI and Langfuse compare on user base?
- Fiddler AI: Fortune 100 organizations. Langfuse: Used by 21 of Fortune 50; 90B+ observations/month; 100,000+ engineers building on Langfuse.
- How do Fiddler AI and Langfuse compare on target sectors?
- Fiddler AI: financial services, healthcare, insurance, and government. Langfuse: no public information disclosed.
- How do Fiddler AI and Langfuse compare on high-risk domains?
- Fiddler AI: financial services, healthcare, insurance, and government. Langfuse: no public information disclosed.
- How do Fiddler AI and Langfuse compare on market recognition?
- Fiddler AI: no public information disclosed. Langfuse: Vendor states its platform is used by 21 of the Fortune 50 companies..
- How do Fiddler AI and Langfuse compare on pricing model?
- Fiddler AI: usage-based at $0.002 per trace. Langfuse: Usage-based free tier (50k observations/month) with no credit card required; paid tiers not detailed on this page.
- How do Fiddler AI and Langfuse compare on price point?
- Fiddler AI: $0.002 per trace. Langfuse: Free tier: 50k observations/month, no credit card required.