Mailgun vs LangSmith

Mailgun

LangSmith

Mailgun · 14 features

• Batch Sending — Send up to 1,000 recipients per API call via recipient variables.
• Dedicated IPs — IP pools with auto warmup. Scale+ tier.
• Deliverability Suite — Inbox placement testing, DMARC reporting, seed lists.
• Email Logs — Searchable log of all send attempts + events.
• Email Templates — Template builder + variables + versioning.
• Email Validation — Real-time email verification (syntax, MX, role accounts, disposable).
• EU Region — Data stored in EU for GDPR-sensitive customers.
• Inbound Routing — Route incoming emails to URLs/SMTP. Attachment forwarding.
• Mailing Lists — Unlimited mailing lists with bulk subscribe/unsubscribe.
• Open/Click Tracking — HTML + text tracking with configurable tracking domain.
• SAML SSO — Scale+ tier.
• Send API — REST/SMTP send with MIME + tracking.
• Tags — Tag messages to slice stats.
• Webhook Events — delivered, opened, clicked, unsubscribed, complained, permanent_fail, temporary_…

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.