Payload CMS vs LangSmith
TypeScript-first open-source headless CMS — code-first, config-driven
vs. LLM observability, testing & evaluation — by LangChain
Pricing tiers
Payload CMS
Open Source (self-host)
MIT license. Run free on any Node host. Full admin + APIs.
$0 base (usage-based)
Cloud — Standard
$35/month. 3 GB DB storage, 30 GB file storage, 40 GB bandwidth.
$35/mo
Cloud — Pro
$199/month. Higher resources + priority support.
$199/mo
Cloud — Enterprise
Custom cloud hosting with dedicated support.
Custom
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
Free-tier quotas head-to-head
Comparing oss on Payload CMS vs developer on LangSmith.
| Metric | Payload CMS | LangSmith |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
Payload CMS · 18 features
- Access Control — Function-based per-collection/field access rules.
- Admin UI — React admin — fully customizable components + views.
- Authentication — Built-in JWT + HTTP-only cookies + API keys.
- Blocks — Flexible page-builder pattern via block field.
- Collections — Schema-defined content types with fields, hooks, access control.
- Drafts & Versions — Version every change. Autosave, drafts, scheduled publish.
- Field Types — Rich field library: text, textarea, richText (Lexical), upload, relation, blocks…
- Form Builder Plugin — Dynamic forms with submissions storage.
- Globals — Single-instance documents (site settings, header, footer).
- GraphQL API (auto) — Full schema auto-generated.
- Hooks — Lifecycle hooks: beforeChange/Read/Delete, afterChange, etc.
- i18n — Multi-locale field values + admin UI translations.
- Live Preview — Side-by-side editor + iframe preview of Next.js site.
- Local API (zero latency) — Direct in-process data access. Ideal for Next.js server components.
- Multi-Tenancy Plugin — Multi-tenant content isolation via plugin.
- @payloadcms/plugin-seo — Built-in SEO meta fields.
- Plugins — Official + community plugins (SEO, Stripe, Form Builder, multi-tenant, etc.).
- REST API (auto) — Auto-generated REST endpoints for every collection.
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 | Payload CMS | LangSmith |
|---|---|---|
| CLI | create-payload-app | LangSmith CLI |
| SDK | @payloadcms/next (Node) | langsmith-js, langsmith-python |
| REST | Payload REST API | LangSmith REST API |
| GRAPHQL | Payload GraphQL API | — |
| MCP | — | LangSmith MCP |
| OTHER | Admin UI, Local API (Node.js direct) | LangSmith Dashboard |
Staxly is an independent catalog of developer platforms. Outbound links to Payload CMS and LangSmith are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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