Agentic Index
LangChain vs Mastra (2026)
Choose LangChain if your organization builds agents in Python and choose Mastra if it builds in TypeScript. That verdict is the Agentic Index coverage score, graded from each vendor's own published materials.
LangChain brings the largest ecosystem plus LangSmith from 39 dollars a seat a month with a free tier, while Mastra brings workflows, evals, and Mastra Studio to TypeScript teams from 250 dollars a month with a free tier. For full stack JavaScript shops, Mastra removes the language boundary that makes LangChain adoption awkward.
On the Agentic Index agent infrastructure ranking, Mastra clears the bar and LangChain does not. Mastra documents all five production contract capabilities in full; LangChain does not document security and identity governance in full, nor observability and auditability. 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 Mastra 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
- Your agent logic lives in Python alongside your data and ML tooling
- You want the deepest catalog of prebuilt integrations available
- Managed observability and orchestration from one vendor simplifies procurement
Choose Mastra if
- Your product team ships TypeScript and wants agents in the same language and repo
- Built in evals and workflow orchestration matter from day one
- You would rather adopt a framework designed for TypeScript than a port
| At a glance | LangChain | Mastra |
|---|---|---|
| Category | Agent infrastructure | Agent infrastructure |
| Entry price | Free / OSS | From $250/mo · free tier |
| Free / trial | Free (OSS self-host) | Free tier |
| Pricing confidence | public exact | public exact |
| Feature | L LangChain |
M Mastra |
|---|---|---|
| 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 | Full / Explicit |
| 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 | 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. |
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 | Full / Explicit |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing | L LangChain |
M Mastra |
|---|---|---|
|
Entry price Lowest public entry point |
Free / OSS | From $250/mo · free tier |
|
Pricing confidence How public the numbers are |
Public, exact | Public, exact |
|
Billing Primary billing axis |
usage | hybrid |
|
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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