LangSmith vs Lovable
LLM observability, testing & evaluation — by LangChain
vs. AI app builder with shared team workspace — unlimited users per plan
Pricing tiers
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
Lovable
Free
Limited features baseline. Try out and build small demos.
Free
Pro
$25/month (shared across unlimited users). 100 credits/mo + 5 daily (up to 150/mo). Custom domains, remove Lovable badge, user roles.
$25/mo
Business
$50/month (shared). Everything in Pro + Internal publish, SSO, Team workspace, personal projects, design templates, security center.
$50/mo
Enterprise
Custom (platform fee by company size). Covers all employees. Volume credits, dedicated support, onboarding, SCIM, audit logs.
Custom
Free-tier quotas head-to-head
Comparing developer on LangSmith vs free on Lovable.
| Metric | LangSmith | Lovable |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
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.
Lovable · 16 features
- Connect External APIs — Chat: "connect OpenAI API" → done.
- Custom Domains — Publish at yourbrand.com.
- Design Templates — Pre-made design systems (Business tier).
- GitHub 2-way Sync — Commit from Lovable or edit in repo — reflects both ways.
- Image/Sketch to UI — Upload screenshot → get matching UI.
- Internal Publish — Deploy internally only (Business tier).
- Live Preview — See the app live while iterating.
- Prompt-to-App — Natural language → running React app.
- Remove Lovable Badge — White-label output — no Lovable branding.
- SCIM Provisioning (Ent) — Directory sync.
- Security Center — Audit + permissions console (Business+).
- Stripe Integration — Built-in Stripe payments setup.
- Supabase Native — First-class Supabase auth + DB integration.
- Team Workspace — Shared projects + roles.
- User Roles — Role-based access control.
- Visual Edit — Click element → describe change.
Developer interfaces
| Kind | LangSmith | Lovable |
|---|---|---|
| CLI | LangSmith CLI | — |
| SDK | langsmith-js, langsmith-python | — |
| REST | LangSmith REST API | Lovable API (preview) |
| MCP | LangSmith MCP | — |
| OTHER | LangSmith Dashboard | GitHub 2-way sync, Lovable Web App, Supabase Native |
Staxly is an independent catalog of developer platforms. Outbound links to LangSmith and Lovable are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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