LangSmith vs Formspree

LangSmith

Formspree

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.

Formspree · 11 features

• Custom Success Redirect — Redirect after submit.
• Email Notifications — Submissions delivered to inbox.
• File Uploads — Accept attachments (Unlimited).
• IP Filtering — Block spam IPs.
• React SDK — Hooks + state management.
• Rules Engine — Conditional routing, auto-responders.
• Spam Protection — Honeypot + reCAPTCHA + keyword filter.
• Submission Analytics — Volume + source stats.
• Team Members — Multi-user (Unlimited).
• Webhooks — POST submissions to your server.
• Zero Backend — HTML <form action> → email.