Pay-as-you-go per token. No minimum. Free trial with limited credits for new accounts. Pricing varies by model from $0.00015/1K tokens (Titan Lite) to $0.015/1K tokens (Claude 3 Opus). Provisioned throughput available.

LangChain framework is open source and free. LangSmith (observability platform) free up to 5,000 traces/month, Developer $39/month, Plus $99/month. Enterprise custom pricing.

Bedrock inherits AWS's enterprise security and compliance framework. Data can remain within specific AWS regions for data residency requirements. Model outputs are not used for training. Customer data handling is governed by AWS's standard terms.

Open source LangChain: data stays within your infrastructure. LangSmith cloud: review LangChain's data handling policy. Enterprise LangSmith includes data processing agreements.

• ✓AWS integration simplifies approval for organisations already on AWS
• ✓Comprehensive compliance coverage across HIPAA, SOC 2, ISO 27001
• ✓Access to multiple leading models through one API
• ✓Agents and Knowledge Bases enable enterprise AI application building without custom infrastructure

• ✓Most widely adopted LLM application framework with large community
• ✓Integrates with virtually every LLM provider and vector database
• ✓RAG and agent patterns well-supported with established conventions
• ✓LangGraph enables complex stateful multi-agent workflows

• ✕Developer and enterprise product with no consumer value
• ✕Pricing can become complex for diverse model usage
• ✕Models available more cheaply through direct provider APIs in some cases

• ✕Abstraction layer adds complexity for simple use cases
• ✕Learning curve for understanding chains, agents, and retrieval patterns
• ✕Framework has been criticised for unnecessary abstraction in some scenarios
• ✕LangSmith observability requires separate setup and subscription