vendor · observability
Coval (YC S24) vs Langfuse
49 fields both were evaluated on, 31 of them different — including where one discloses something the other does not. Every value links to the document it came from. 18 further fields are disclosed by neither and are listed at the end rather than tabled.
Assurance
| Field | Coval (YC S24) | Langfuse |
|---|---|---|
| Audit trail· | “Agent Behaviors to Evaluate The moments that make or break the call.”www.coval.dev · checked Aug 1, 2026 | “Hierarchical traces capture every LLM call, tool invocation, and retrieval step.”langfuse.com · checked Aug 11, 2026 |
| Explainability· | “Explanation The agent proceeded with account-level requests without completing the required identity verification steps.”www.coval.dev · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Runtime governance· | “Protect the account. Prove identity verification holds before an agent shares sensitive information or takes action.”www.coval.dev · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Permission scopes· | 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· | “SOC 2 Type II Secure, compliant data management across all systems. In Progress GDPR Data processed and stored in compliance with European regulation. HIPAA Built to handle Protected Health Information compliantly.”www.coval.dev · checked Aug 1, 2026 Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations | 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· | “In Progress GDPR Data processed and stored in compliance with European regulation. HIPAA Built to handle Protected Health Information compliantly.”www.coval.dev · checked Aug 1, 2026 Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations | 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.coval.dev · checked Aug 1, 2026 | |
| Evaluation coverage· | “Coval gives teams the voice AI testing, evals, and QA loop”www.coval.dev · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Self-reported performance· | no public information status.coval.dev · checked Aug 29, 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· | Voice AI Testing & Evaluation Platform “Voice AI Testing & Evaluation Platform | Coval”www.coval.dev · checked Aug 1, 2026 | |
| Underwriting backing· | no public information langfuse.com · checked Aug 11, 2026 | |
| Client types· | no public information www.coval.dev · checked Aug 1, 2026 |
Safety
| Field | Coval (YC S24) | Langfuse |
|---|---|---|
| Safety evaluations· | “Coval gives teams the voice AI testing, evals, and QA loop”www.coval.dev · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Red teaming· | “Simulate Run thousands of realistic conversations before launch.”www.coval.dev · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Incident reporting· | no public information www.coval.dev · checked Aug 1, 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.coval.dev · checked Aug 1, 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· | “SOC 2 Type II Secure, compliant data management across all systems.”www.coval.dev · checked Aug 1, 2026 Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations | 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 | Coval (YC S24) | Langfuse |
|---|---|---|
| Pricing model· | no public information www.coval.dev · checked Aug 1, 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· | no public information www.coval.dev · checked Aug 1, 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· | no public information www.coval.dev · checked Aug 1, 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· | no public information www.coval.dev · checked Aug 1, 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· | 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· | European regulation “In Progress GDPR Data processed and stored in compliance with European regulation.”www.coval.dev · checked Aug 1, 2026 Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations | EU and US data regions, with a HIPAA-ready region “EU & US Data Regions HIPAA-ready region”langfuse.com · checked Aug 11, 2026 |
Ecosystem
| Field | Coval (YC S24) | Langfuse |
|---|---|---|
| Protocols supported· | 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.coval.dev · checked Aug 1, 2026 | |
| Open source· | no public information www.coval.dev · checked Aug 1, 2026 |
Impact
| Field | Coval (YC S24) | Langfuse |
|---|---|---|
| User base· | teams putting voice AI in front of millions of customers “Trusted by teams putting voice AI in front of millions of customers.”www.coval.dev · checked Aug 1, 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· | 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· | the world's most regulated industries “Trusted across the world's most regulated industries”www.coval.dev · checked Aug 1, 2026 Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations | no public information langfuse.com · checked Aug 11, 2026 |
| High-risk domains· | the world's most regulated industries “Trusted across the world's most regulated industries”www.coval.dev · checked Aug 1, 2026 Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations | no public information langfuse.com · checked Aug 11, 2026 |
| Market recognition· | no public information status.coval.dev · checked Aug 29, 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 Coval (YC S24) and Langfuse publish nothing on these 18 fields. That is a finding about the category rather than a difference between them, so it is recorded here instead of as 18 identical table rows. Each is shown with its source check on the individual profiles.
- Documented incidents
- Support model
- Marketplace presence
- 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
- Regulatory status
Questions
- How do Coval (YC S24) and Langfuse compare on user base?
- Coval (YC S24): teams putting voice AI in front of millions of customers. Langfuse: Used by 21 of Fortune 50; 90B+ observations/month; 100,000+ engineers building on Langfuse.
- How do Coval (YC S24) and Langfuse compare on target sectors?
- Coval (YC S24): the world's most regulated industries. Langfuse: no public information disclosed.
- How do Coval (YC S24) and Langfuse compare on high-risk domains?
- Coval (YC S24): the world's most regulated industries. Langfuse: no public information disclosed.
- How do Coval (YC S24) and Langfuse compare on market recognition?
- Coval (YC S24): no public information disclosed. Langfuse: Vendor states its platform is used by 21 of the Fortune 50 companies..
- How do Coval (YC S24) and Langfuse compare on pricing model?
- Coval (YC S24): no public information disclosed. Langfuse: Usage-based free tier (50k observations/month) with no credit card required; paid tiers not detailed on this page.
- How do Coval (YC S24) and Langfuse compare on price point?
- Coval (YC S24): no public information disclosed. Langfuse: Free tier: 50k observations/month, no credit card required.