Vercel vs LangSmith

Frontend cloud for Next.js and modern web frameworks
vs. LLM observability, testing & evaluation — by LangChain

Vercel website ↗LangSmith website ↗

Pricing tiers

Vercel

Hobby (Free)

Free forever. 100 GB bandwidth, 1M functions, 360 GB-hrs memory, 1M edge requests. 1 developer. Hard caps.

Free

Pro

$20/user/month. 1 TB bandwidth, pay-as-you-go overages. Team seats, concurrent builds.

$20/mo

Enterprise

Custom pricing. SLA, SSO, audit logs, dedicated support.

Custom

Vercel website ↗

LangSmith

Developer (Free)

Free forever. 5,000 traces/month. 14-day retention. 1 seat. Basic evaluations.

Free

Plus

$39/seat/month. 10k base traces included ($2.50 per 1k overage). Full evaluations, custom dashboards, email support.

$39/mo

Enterprise

Custom. Self-host option, SSO, custom retention, dedicated support.

Custom

LangSmith website ↗

Free-tier quotas head-to-head

Comparing hobby on Vercel vs developer on LangSmith.

Metric	Vercel	LangSmith
bandwidth gb month	100 GB/month	—
edge requests	1000000 requests/month	—
function invocations	1000000 invocations/month	—
memory gb hrs	360 GB-hrs/month	—
team members	1 users	—

Features

Vercel · 15 features

Cron Jobs — Scheduled serverless functions. JSON config in vercel.json.
Edge Functions — V8-isolate serverless functions at edge locations. Lower cold start than Lambda.
Edge Middleware — Intercept requests at edge before hitting origin — auth, routing, A/B tests.
Git-based Deploys — Auto-deploy from GitHub, GitLab, Bitbucket on every push. Preview URLs for every…
Image Optimization — On-the-fly resize, format conversion (AVIF, WebP), CDN caching.
Incremental Static Regeneration — Re-generate static pages on-demand or via revalidate. Next.js-native.
Log Drains — Stream logs to Datadog, Axiom, Logtail, HTTP endpoints.
Preview Deployments — Unique URL per Git branch/PR. Password-protect or share. Infinite.
Serverless Functions — Node.js, Python, Go. AWS Lambda under the hood. Up to 15 min duration.
Speed Insights — Real User Monitoring. FCP, LCP, CLS, INP per page.
Vercel Blob — Managed object storage (S3-compatible API).
Vercel KV (Redis) — Managed Redis via Upstash. Edge-accessible.
Vercel Marketplace — One-click integrations: Supabase, Clerk, Sentry, PostHog, Resend, 100+ services.
Vercel Postgres — Managed Neon Postgres. Edge-accessible with @vercel/postgres.
Web Analytics — Privacy-friendly web analytics. Core Web Vitals, visitors, pages.

LangSmith · 14 features

Alerts — Threshold alerts on latency, cost, eval metrics.
Annotation Queues — Human-review workflows for trace quality rating.
Custom Dashboards — Aggregate metrics dashboards per project/tag.
Datasets — Collect examples → use as eval sets or training data.
Evaluations — LLM-as-judge, embedding similarity, custom Python evaluators, offline batch eval…
LangChain Integration — Auto-trace any LangChain/LangGraph run with env var.
LangGraph Integration — First-class trace + eval for LangGraph agents.
LLM Tracing — Automatic trace every LLM call + tool call + chain step.
OpenTelemetry Export — Export traces as OTLP to Datadog/Honeycomb/etc.
Playground — Test prompts + models inline before deploying.
Prompt Canvas — Visual prompt editor with live test + eval.
Prompt Hub — Public + private prompt library with versioning.
Self-Hosted (Enterprise) — Docker + k8s deployment in your infra.
Threads + Sessions — Group traces into conversational sessions.

Developer interfaces

Kind	Vercel	LangSmith
CLI	Vercel CLI	LangSmith CLI
SDK	@vercel/client	langsmith-js, langsmith-python
REST	Vercel REST API	LangSmith REST API
MCP	Vercel MCP	LangSmith MCP
OTHER	Edge Runtime Bindings	LangSmith Dashboard

Staxly is an independent catalog of developer platforms. Some links to Vercel and LangSmith may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.

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