LangSmith vs TrueFoundry AI Gateway
LangSmith
langchain.comTrueFoundry AI Gateway
truefoundry.comSide by side
| Figure | LangSmith | TrueFoundry AI Gateway |
|---|---|---|
| Price from | $39/mo | $25/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 9 |
| Spec score · LLM Gateway Software | 9.2 (#1) | 8.7 (#7) |
| Spec score · LLM gateways | 9.3 (#2) | 8.9 (#6) |
| Deployment | Deployment provides managed or self-hosted agent servers with streaming, cron scheduling, authentication, MCP support and more than 30 API endpoints. | The gateway supports SaaS and, for Enterprise, VPC, on-premises and air-gapped deployment options. |
| Founded | 2023 | TrueFoundry states it was founded in 2021 by Nikunj Bajaj, Abhishek Choudhary and Anuraag Gutgutia. |
| Funding | LangChain announced a $125 million Series B at a $1.25 billion valuation on October 20, 2025. | TrueFoundry announced a $19 million Series A led by Intel Capital, bringing reported total funding to $21 million. |
| Headquarters | San Francisco, California, United States | San Francisco, California, United States |
| Observability | Its observability features include agent tracing, cost tracking, online LLM-as-judge and code evaluations, trajectory monitoring, and webhook or PagerDuty alerts. | Monitoring covers requests, tokens, cost, latency percentiles, time to first token, inter-token latency and request-level traces. |
| Purpose | LangSmith is a commercial agent engineering platform for building, testing, deploying, monitoring, and improving AI agents. | TrueFoundry AI Gateway sits between applications and model providers to manage AI model access, routing, governance, observability, security and cost controls. |
| Rating on AWS Marketplace | 4.4 out of 5 from 78 external ratings sourced from G2; the listing shows zero AWS-native reviews. | 4.6 out of 5 from 65 ratings |
| Rating on G2 | 4.4 out of 5 from 78 reviews. | 4.6 out of 5 from 59 reviews |
| Rating on Gartner Peer Insights | 4.4 out of 5 from 25 ratings. | 4.8 out of 5 from 249 reviews |
| SDKs | Official SDK documentation is provided for Python, JavaScript/TypeScript, Go and Java. | A public Python gateway SDK supports synchronous and asynchronous clients, streaming agent responses over Server-Sent Events, retries, pagination and custom clients. |
| Support | The Developer plan includes community support, and the Enterprise plan lists a support SLA. | The listed support options are an in-app chatbot and Discord for Developer, a support portal for Pro, and priority support, SLA and a dedicated Slack channel for Enterprise. |
| What it does | LangSmith is LangChain's framework-agnostic platform for observing, evaluating and deploying AI agents. | TrueFoundry AI Gateway is a control layer that connects applications to models, tools and agents while centralizing routing, governance, observability and cost controls. |
Plans
TrueFoundry AI Gateway
- DeveloperFree
- DeveloperFree
- Pro$25 a month
- Pro$499 a month
- Pro Plus$2,999 a month
- TrueFoundry Pro (AWS Marketplace)$6,250 a month
- TrueFoundry Enterprise (AWS Marketplace)$12,500 a month
- TrueFoundry On-Prem (AWS Marketplace)$16,666.66 a month
- EnterprisePriced on request
In their own words
LangSmith
LangSmith is a commercial agent-engineering platform for building, evaluating, deploying, monitoring, and improving AI agents. It supports offline evaluations on curated datasets and real-time scoring of production interactions. Evaluation methods include human review, heuristic checks, LLM-as-judge evaluators, pairwise comparisons, and custom Python or TypeScript evaluators. Annotation queues route runs to subject-matter experts for feedback that can calibrate evaluations, improve prompts, or augment datasets. The Playground compares prompt versions or model providers, and LangSmith chat can auto-improve prompts. Observability includes agent and retrieval tracing, token and general cost tracking, trajectory monitoring, online evaluations, and webhook or PagerDuty alerts. Traces can arrive through SDKs or an API from LangGraph, custom Python, or other stacks; SDKs are listed for Python, TypeScript, Go, and Java. Hosting ranges from cloud to hybrid and self-hosted Enterprise options. The Developer plan costs nothing, Plus costs $39 a month, and Enterprise pricing is custom.
TrueFoundry AI Gateway
TrueFoundry AI Gateway sits between applications and model providers to manage model access, routing, governance, observability, security, and cost controls. Its unified API supports chat, completion, embedding, and reranking models. TrueFoundry says the gateway connects to more than 1,000 LLMs across more than 35 platforms, including OpenAI, AWS Bedrock, Google Vertex AI, Azure OpenAI, and Anthropic. Routing options include latency-based selection, weighted load balancing, and automatic fallbacks. The service tracks token usage, latency, errors, and request volumes, and supports centrally stored request and response logs. Teams can set rate limits and cost or token quotas, with role-based access controls. MCP connections include tools such as Slack, GitHub, Confluence, and Datadog, with policies for tool calls. Deployment includes SaaS, with VPC, on-premises, and air-gapped options for Enterprise. Developer is free; Pro costs $25 a month, billed per user. Developer includes 10,000 requests per user monthly, while Pro includes 20,000 and charges $20 per additional 100,000 requests.