Agentic Index
LangChain vs LlamaIndex (2026)
Choose LangChain for general agent orchestration and choose LlamaIndex when document ingestion and retrieval quality are the center of the build. That verdict is the Agentic Index coverage score, graded from each vendor's own published materials.
LangChain pairs its open source framework with LangGraph orchestration and LangSmith observability from 39 dollars a seat a month with a free tier, while LlamaIndex anchors on LlamaParse ingestion and LlamaCloud from 50 dollars a month with a free tier. Teams building RAG heavy data agents get more out of the box from LlamaIndex, while teams wiring multi step agent pipelines get more from LangChain.
On the Agentic Index agent infrastructure ranking, neither LangChain nor LlamaIndex clears the bar, which asks for all five production contract capabilities documented in full. LangChain does not document security and identity governance in full, nor observability and auditability; LlamaIndex does not document observability and auditability in full. 34 of the 186 vendors in the lane clear it. See the agent infrastructure ranking
This comparison is published by Agentic Index, an independent agentic AI vendor research platform. LangChain and LlamaIndex are each graded against the same 14 capability Agentic Index taxonomy, from the vendor's own public materials under the Agentic Index verification standard, alongside 956 researched vendors. No vendor pays for placement and no vendor has reviewed this page. How this evidence is graded
Choose LangChain if
- You are orchestrating multi step agent workflows and want graph based control flow
- LangSmith observability across a large existing LangChain codebase is your operating reality
- You want the largest integration ecosystem and community surface in the framework space
Choose LlamaIndex if
- Document parsing quality decides your product and LlamaParse handles your messiest PDFs
- You are building RAG pipelines and data agents rather than broad orchestration
- A managed ingestion and retrieval backend via LlamaCloud beats assembling your own
| At a glance | LangChain | LlamaIndex |
|---|---|---|
| Category | Agent infrastructure | Agent infrastructure |
| Entry price | Free / OSS | From $50/mo · free tier |
| Free / trial | Free (OSS self-host) | Free (10k credits/mo) |
| Pricing confidence | public exact | public exact |
| Feature | L LangChain |
L LlamaIndex |
|---|---|---|
| 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. |
Full / Explicit | Full / Explicit |
|
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. |
Partial | Partial |
| 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. |
Full / Explicit | Full / Explicit |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
Full / Explicit | Full / Explicit |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Full / Explicit | Full / Explicit |
|
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. |
Partial | Partial |
|
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. |
Full / Explicit | Full / Explicit |
| 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 | Full / Explicit |
|
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 LangChain |
L LlamaIndex |
|---|---|---|
|
Entry price Lowest public entry point |
Free / OSS | From $50/mo · free tier |
|
Pricing confidence How public the numbers are |
Public, exact | Public, exact |
|
Billing Primary billing axis |
usage | credits |
|
Variable cost Workload / overage exposure |
Medium variable cost | Medium variable cost |
|
Free tier / trial Try before you buy |
Free tier
|
Free tier
|
|
Buying motion Self-serve vs sales call |
Self-serve | Mixed |
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