# LangChain Unveils LangSmith AI Agent Platform After $300 Million Funding - Original post: https://www.twitter.com/i/status/2121279222912352574 - Source account: [@hwchase17](https://x.com/hwchase17) - Source language: English - Duration: 1:56 - Published: 2026-11-14 - Canonical URL: https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding ## Transcript [0:00](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding) We just raised 300 million in our series C at a 3 billion valuation to help every company own its intelligence. [0:06](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=6) Over the past three years, millions of developers have used LangChain frameworks to build agents. [0:11](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=11) And today, we're putting everything we've learned into one platform, the new LangSmith. [0:15](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=15) Right now, everyone is building agents, but only a handful of them are transforming businesses. [0:20](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=20) Those that do are proactive, specialized, and they get better over time. [0:24](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=24) The only way to build these agents is to keep iterating on them. [0:27](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=27) See what they did, measure it, fix it, and ship it again. [0:29](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=29) Today, these steps are spread across multiple tools that weren't built for agents, and that's where LangSmith comes in. [0:35](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=35) LangSmith is built for and powered by agents, supporting the entire agent development lifecycle, so you can build, run, improve, and govern every agent. [0:45](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=45) Here's how it works. LangSmith lets anyone on your team build an agent in natural language or in code. [0:50](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=50) You can use LangChain's open-source harnesses or any harness. [0:53](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=53) Deploy your agent in one click. LangSmith handles the infrastructure so it can run and scale reliably. [0:59](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=59) Workday adopted LangSmith, and deploying a new agent went from five months to under a day. [1:04](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=64) Every agent across your company is visible from one place, so you always know what's running. [1:08](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=68) You can trace every step an agent takes and see exactly where it went wrong. [1:12](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=72) Every time you make a change, evals test the new version, so you know it's better before it ships. [1:16](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=76) LangSmith Engine monitors your agents 24/7 to find failures. [1:20](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=80) It writes the fixes and evals for you. All you have to do is review and merge. [1:24](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=84) Teams using LangSmith Engine improve their agents five times faster. [1:28](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=88) Every run is governed by LangSmith, with model fallbacks, cost controls, and protection for sensitive data. [1:33](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=93) Today, LangSmith processes billions of traces a month, with more than 7,000 customers relying on it every day. [1:39](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=99) Our goal is to help every company own its intelligence, from the agents it builds to the systems that improve and govern them. [1:44](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=104) That starts with helping teams build agents they can trust in production. [1:48](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=108) So we're providing LangSmith Engine for free to all new plus subscribers through the end of the year. [1:53](https://www.translate.mom/transcript/1igKwCeKlXhR/en/langchain-unveils-langsmith-ai-agent-platform-after-300-million-funding?t=113) Start building today at langsmith.com.