LangSmith Pricing

freemiumlast verified August 29, 2026official site ↗

Plan	Price	Notes
Developerofficial source ↗	$0checked 2026-08-29	1 seat, 5,000 base traces/month included, 14 days retention, playgrounds, prompt hub, dataset management
Plusofficial source ↗	USD 39/month · per seatchecked 2026-08-29	$39/seat/month; unlimited team seats, 10,000 base traces/month included, overage at $0.50 per 1,000 traces, 14-day base retention, optional extended 400-day retention, role-based access control
Enterpriseofficial source ↗	Customchecked 2026-08-29	Custom volume-tiered traces, custom retention periods, self-hosted/VPC deployment, SSO/SAML, enterprise SLAs, audit logs, dedicated support

structured from cited official pricing sources: “Developer plan is free for 1 user with 5,000 traces/month and 14-day retention. Plus tier is $39/seat/month and includes 10,000 traces/month with $0.50 per 1,000 trace overage and team collaboration features. Enterprise plan provides custom trace volume, extended data retention (400 days), self-hosted or VPC deployments, SSO, and dedicated SLAs.”

Free & cheaper Testing & QA

same category, free plan or open-source license

OpenLITopen source100% free and open source under the Apache-2.0 license ($0 self-hosted on Docker and Kubernetes). Features OpenTelemetry-native LLM tracing, GPU hardware metrics (NVIDIA/AMD/Intel), Prompt Hub, and security guardrails. Managed OpenLIT Cloud edition is available for hosted enterprise deployments.MCP Inspectoropen sourceFree and 100% open source under the MIT license ($0 software cost). mcp-inspector is the official Model Context Protocol developer testing suite, running entirely locally via npx/Node.js with no subscription tiers, cloud fees, or telemetry.Playwrightopen sourcePlaywright is a free and open-source end-to-end testing framework created by Microsoft under the Apache 2.0 license. It provides cross-browser automation across Chromium, Firefox, and WebKit without any licensing fees.Grafanaopen sourceGrafana is free and open-source under AGPL-3.0 for self-hosting. Grafana Cloud features a generous free tier (10k metrics series, 50GB logs/traces) and a Pro tier starting at $19/month plus pay-as-you-go usage.

LangSmith overview →alternatives →review: 80/100 →

FAQ

How much does LangSmith cost?

Developer plan is free for 1 user with 5,000 traces/month and 14-day retention. Plus tier is $39/seat/month and includes 10,000 traces/month with $0.50 per 1,000 trace overage and team collaboration features. Enterprise plan provides custom trace volume, extended data retention (400 days), self-hosted or VPC deployments, SSO, and dedicated SLAs. Paid pricing starts at $39/seat/month.

Does LangSmith have a free plan?

Yes — LangSmith has a free plan alongside its paid tiers.

What are free or cheaper LangSmith alternatives?

OpenLIT, MCP Inspector, Playwright are in the same category with a free plan or open-source license.

pricing is editorial catalog data (last verified August 29, 2026) — vendors change plans; confirm on the official site before you buy. Reuse this data under CC-BY 4.0 via /data.