Agentic Index
Langfuse vs Opik (2026)
Langfuse and Opik are the two open source LLM observability platforms teams actually shortlist, and both self host free: Langfuse's MIT core is the adoption leader with a clean cloud ladder (free Hobby at fifty thousand units a month, Core at 29 dollars, Pro at 199 dollars, Enterprise at 2,499 dollars a month, overage at 8 dollars per hundred thousand units), while Opik from Comet ships its full feature set in the Apache 2.0 build with a free managed cloud tier and Pro and Enterprise plans billed on spans, differing mainly in limits, retention, and support. Choose Langfuse for ecosystem maturity and pricing clarity, Opik for the most complete free open source build.
| At a glance | Langfuse | Opik |
|---|---|---|
| Category | Agent infrastructure | Agent infrastructure |
| Entry price | Free Hobby (50K units/mo) · Core $29/mo · open source self host | Open source, free to self host; free cloud tier; Pro and Enterprise usage based |
| Free / trial | Free Hobby plan, no card (50K units/mo, 2 users) | Apache 2.0 open source free to self host, plus a free managed cloud tier |
| Pricing confidence | public exact | public partial |
| Feature |
L
Langfuse
|
O
Opik
|
|---|---|---|
| Action & orchestration | ||
|
Integrations & Tool Calling Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools. |
Full / Explicit | Full / Explicit |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
No / Not documented | No / Not documented |
|
Triggers & Channel Coverage How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools. |
No / Not documented | No / Not documented |
| Knowledge & context | ||
|
Knowledge Grounding & RAG Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers. |
No / Not documented | No / Not documented |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
No / Not documented | No / Not documented |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Full / Explicit | Partial |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
Partial | Full / Explicit |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Full / Explicit | Full / Explicit |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
Full / Explicit | Full / Explicit |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
No / Not documented | No / Not documented |
| Platform extensibility | ||
|
Model Flexibility & Routing Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys. |
Full / Explicit | Partial |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
Full / Explicit | Full / Explicit |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
Full / Explicit | Full / Explicit |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented | No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing |
L
Langfuse
|
O
Opik
|
|---|---|---|
|
Entry price Lowest public entry point |
Free Hobby (50K units/mo) · Core $29/mo · open source self host | Open source, free to self host; free cloud tier; Pro and Enterprise usage based |
|
Pricing confidence How public the numbers are |
Public — exact | Public — partial |
|
Billing Primary billing axis |
usage | spans and usage tier |
|
Variable cost Workload / overage exposure |
Medium variable cost | Low variable cost |
|
Free tier / trial Try before you buy |
Free tier
|
Free tier
|
|
Buying motion Self-serve vs sales call |
Self-serve | Mixed |
Choose Langfuse if
- The largest community and integration ecosystem derisk your observability bet.
- A published pricing ladder from 29 dollars a month makes budgeting simple.
- Prompt management plus tracing plus evals in one proven stack is the requirement.
Choose Opik if
- Full features in the open source build with nothing gated is the deciding factor.
- You already use Comet tooling, so Opik extends a familiar stack.
- Span based cloud billing that starts free fits an experimentation phase.