LangChain LangSmith Developer (Free)

LangSmith is LangChain's platform for observability and evaluation of LLM and agent applications. Its Developer plan is free for one seat, with 5k base traces a month.

LangChainUpdated monthly · checked 22 h ago

LangChain LangSmith Developer (Free) is an AI and ML perk from LangChain, offering a free seat, 5K traces a month, with no funding required.

Value: Free
Who qualifies: No funding needed
Benefit type: Free plan
Terms: Verified

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While you apply

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What you get

Inside LangChain LangSmith Developer (Free)

The Developer plan is for solo users and includes 1 seat and up to 5k base traces a month, then pay-as-you-go.
Base traces are kept for 14 days, and extended traces are retained for 180 days for an additional fee.
The Plus plan is $39 per seat a month and includes 10k base traces a month.

Source: The provider's official program page

Eligibility

Who it's for

Free plan Any startup

Funding / backing: No funding needed
Geography: Global
Recurring / expiry: Free plan with no time limit.
Other requirements: The Developer plan is limited to 1 seat. The Plus plan adds unlimited seats.

How to claim

How to apply for LangChain LangSmith Developer (Free)

Steps to apply

1Click Start for free on langchain.com/pricing.

Good to know: Plans read on langchain.com/pricing on October 28, 2026.

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Source: The provider's official program page

Value is the headline maximum LangChain advertises. What your company actually receives depends on your eligibility and how you use the program, and terms can change. A comparison, not endorsed by the programs listed. A link labeled as a referral link may earn us a commission, and a program labeled Same owner comes from the company that runs StartupPerks. Confirm current terms on the provider's page.

Questions

LangChain LangSmith Developer (Free): common questions

What do you get with LangChain LangSmith Developer (Free)?

LangChain LangSmith Developer (Free) offers a free seat, 5K traces a month. The Developer plan is for solo users and includes 1 seat and up to 5k base traces a month, then pay-as-you-go. Base traces are kept for 14 days, and extended traces are retained for 180 days for an additional fee. The Plus plan is $39 per seat a month and includes 10k base traces a month.

Who qualifies for LangChain LangSmith Developer (Free)?

LangChain LangSmith Developer (Free) is open to any startup, with no funding required. The Developer plan is limited to 1 seat. The Plus plan adds unlimited seats.

Do I need to be VC-backed or in an accelerator to get LangChain LangSmith Developer (Free)?

No. LangChain LangSmith Developer (Free) is open to any startup that meets the stated criteria, no investor or accelerator backing required.

How do I apply for LangChain LangSmith Developer (Free)?

Click Start for free on langchain.com/pricing.

How long do I have to use LangChain LangSmith Developer (Free), and does it expire?

Free plan with no time limit.

Is LangChain LangSmith Developer (Free) available outside the US?

LangChain LangSmith Developer (Free) is available globally, subject to the provider's terms.

Free LLM observability, comparedLangSmith's free plan next to every other free LLM observability toolWhat each LLM observability tool gives you free today, its main limit and what the first paid plan costs, read from each tool's own page.

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