LangChain vs PlanetScale

LangChain

PlanetScale

LangChain · 18 features

• Agents — Tool-using agents with reasoning loops.
• Chains (LCEL) — LangChain Expression Language — pipe primitives into chains.
• Checkpointers (LangGraph) — Persist agent state to SQL, Mongo, Redis, Postgres.
• Document Loaders — 150+ loaders for PDF, HTML, Notion, Google Drive, S3, GitHub, etc.
• Human-in-the-loop — Pause agent for approval, then resume.
• LangGraph — Stateful graph-based agent runtime. Durable, replayable, human-in-the-loop.
• LangGraph Platform — Managed hosting for LangGraph agents with state persistence.
• LangGraph Studio — Desktop IDE for debugging agent graphs.
• LangServe — Deploy chains as FastAPI endpoints.
• Memory — Buffer, summary, entity, vector memory stores.
• Output Parsers — Structured JSON, Pydantic schemas, function calling.
• Prompt Templates — Templating + partial filling + output parsers.
• RAG (Retrieval-Augmented Generation) — Standard patterns + 50+ retrievers.
• Streaming — First-class streaming at every layer.
• Subgraphs — Compose agent graphs hierarchically.
• Text Splitters — Recursive, token, semantic splitters for chunking.
• Tools — 400+ pre-built tools (web search, code, databases, APIs).
• Vector Store Integrations — 60+ vector DBs (Pinecone, Chroma, Weaviate, PGVector, Qdrant, Milvus).

PlanetScale · 12 features

• Backups — Automated daily backups with retention.
• Database Branching — Git-like branches of your DB schema (not data). Create, diff, merge via deploy r…
• Deploy Requests — Schema changes in a feature branch get reviewed + auto-applied to main with zero…
• HIPAA — HIPAA-compliant deployments (Enterprise).
• Metal (NVMe) — Dedicated NVMe local storage. 10x IOPS vs EBS, latency-critical workloads.
• PgBouncer Pooler — Managed PgBouncer for Postgres clusters. Optional dedicated pooler.
• PlanetScale Boost — Query result cache with sub-ms reads.
• Point-in-Time Recovery — Restore cluster to any point within retention window.
• Postgres on PlanetScale — PostgreSQL 15+ with the same branching + deploy-request flow. Launched 2024.
• Query Insights — Per-query performance analytics, slow query tracking, explain plans.
• Read-only Regions — Route reads to the nearest region for lower latency.
• Vitess (MySQL at scale) — Horizontally-sharded MySQL (YouTube-scale) — original PlanetScale offering.