vendor · observability
KeywordsAI vs Langfuse
49 fields both were evaluated on, 28 of them different — including where one discloses something the other does not. Every value links to the document it came from. 21 further fields are disclosed by neither and are listed at the end rather than tabled.
Assurance
| Field | KeywordsAI | Langfuse |
|---|---|---|
| Audit trail· | “Every LLM call, tool run, retrieval, and agent turn becomes a span in one trace”www.keywordsai.co · checked Aug 1, 2026 | “Hierarchical traces capture every LLM call, tool invocation, and retrieval step.”langfuse.com · checked Aug 11, 2026 |
| Explainability· | “Any span, down to the last field Model, latency, cost, tokens, and the exact input and output sit on every span”www.keywordsai.co · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Runtime governance· | “Set budgets and rate limits per key, per customer, or org-wide, get warned as you near them, and block requests before spend runs away.”www.keywordsai.co · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Permission scopes· | “Set budgets and rate limits per key, per customer, or org-wide”www.keywordsai.co · checked Aug 1, 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· | ISO 27001, SOC 2, GDPR and HIPAA (with a BAA available) are self-declared on the vendor homepage; no report, auditor, certificate date or SOC 2 Type is published on the page checked. “ISO 27001 The internationally recognized standard for information security management. SOC 2 Secure, compliant management of your data across all of our systems. GDPR Operated under GDPR, the world's strictest standard for data privacy. HIPAA HIPAA compliant, with a BAA available for healthcare teams.”www.keywordsai.co · checked Aug 1, 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· | “Operated under GDPR, the world's strictest standard for data privacy.”www.keywordsai.co · checked Aug 1, 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.keywordsai.co · checked Aug 1, 2026 | |
| Evaluation coverage· | “Score every output against the bar you set, so you know it holds up on a test set and in production”www.keywordsai.co · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Self-reported performance· | Claims platform processes 80 trillion+ tokens; also reports 99.99% uptime with fallbacks vs 96.43% single-provider “The AI observability platform behind 80 trillion+ tokens.”www.keywordsai.co · checked Aug 18, 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.keywordsai.co · checked Aug 1, 2026 | |
| Client types· | world-class founders, engineers, and product teams “Loved by world-class founders, engineers, and product teams.”www.keywordsai.co · checked Aug 1, 2026 |
Safety
| Field | KeywordsAI | Langfuse |
|---|---|---|
| Incident reporting· | no public information www.keywordsai.co · 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.keywordsai.co · 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· | no public information www.keywordsai.co · checked Aug 1, 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 |
Practicality
| Field | KeywordsAI | Langfuse |
|---|---|---|
| Pricing model· | no public information www.keywordsai.co · 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.keywordsai.co · 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.keywordsai.co · 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.keywordsai.co · 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· | no public information www.keywordsai.co · checked Aug 1, 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· | no public information www.keywordsai.co · checked Aug 1, 2026 | 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 | KeywordsAI | Langfuse |
|---|---|---|
| Protocols supported· | no public information www.keywordsai.co · checked Aug 1, 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· | ||
| Open source· | no public information www.keywordsai.co · checked Aug 1, 2026 |
Impact
| Field | KeywordsAI | Langfuse |
|---|---|---|
| User base· | no public information www.keywordsai.co · 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· | 80 trillion+ tokens “The AI observability platform behind 80 trillion+ tokens.”www.keywordsai.co · checked Aug 1, 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· | enterprise and healthcare teams “Built to meet the security and privacy standards that enterprise and healthcare teams require.”www.keywordsai.co · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| High-risk domains· | enterprise and healthcare teams “Built to meet the security and privacy standards that enterprise and healthcare teams require.”www.keywordsai.co · checked Aug 1, 2026 | no public information langfuse.com · checked Aug 11, 2026 |
| Market recognition· | Customer testimonial from Retell AI's CTO citing a scale-up from 5M to 500M+ monthly API calls. ““We scaled from 5M to 500M+ monthly API calls quickly. Respan gave us the debugging layer to resolve production issues 10x faster.””www.keywordsai.co · checked Aug 18, 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 KeywordsAI and Langfuse publish nothing on these 21 fields. That is a finding about the category rather than a difference between them, so it is recorded here instead of as 21 identical table rows. Each is shown with its source check on the individual profiles.
- Documented incidents
- Support model
- Marketplace presence
- 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
- Regulatory status
- Underwriting backing
Questions
- How do KeywordsAI and Langfuse compare on user base?
- KeywordsAI: no public information disclosed. Langfuse: Used by 21 of Fortune 50; 90B+ observations/month; 100,000+ engineers building on Langfuse.
- How do KeywordsAI and Langfuse compare on deployment scale?
- KeywordsAI: 80 trillion+ tokens. Langfuse: Processes over 90 billion observations per month, up from a previously reported 10+ billion..
- How do KeywordsAI and Langfuse compare on target sectors?
- KeywordsAI: enterprise and healthcare teams. Langfuse: no public information disclosed.
- How do KeywordsAI and Langfuse compare on high-risk domains?
- KeywordsAI: enterprise and healthcare teams. Langfuse: no public information disclosed.
- How do KeywordsAI and Langfuse compare on market recognition?
- KeywordsAI: Customer testimonial from Retell AI's CTO citing a scale-up from 5M to 500M+ monthly API calls.. Langfuse: Vendor states its platform is used by 21 of the Fortune 50 companies..
- How do KeywordsAI and Langfuse compare on pricing model?
- KeywordsAI: no public information disclosed. Langfuse: Usage-based free tier (50k observations/month) with no credit card required; paid tiers not detailed on this page.