Observabilité et évaluation des applications et agents LLM. The entry ticket requires regular use to be worthwhile.
Price evolution over 12 months
Monthly entry price reconstructed from Internet Archive (snapshots of the official pricing page). Shows whether LangSmith has increased, decreased or stagnated over the past year.
The real cost in practice
The displayed entry price is almost never the real price for daily users. With a tool like LangSmith, two classic traps blow the budget: quotas that run out fast and add-ons billed separately.
Joute rule of thumb: for daily professional use, budget 1.5 to 2x the displayed price. For LangSmith that would put the real monthly bill around 56-74 €/month over time.
If budget is tight, also look at
2 tools in the MCP & connecteurs category with a lower entry price than LangSmith.
Everything about LangSmith's pricing
How much does LangSmith cost in 2026?
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LangSmith is freemium, starting at 37 €/mois. A limited free tier exists to test before paying. Pricing verified on the official pricing page on May 1, 2026.
Is there a free version of LangSmith?
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Yes, LangSmith offers a free tier with limitations (quota, capped features). The paid plan at 37 €/mois removes those limits.
Is LangSmith good value for money?
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Pricey. The entry ticket requires regular use to be worthwhile. If you want cheaper for the same use case, we list lower-cost alternatives above.
Has LangSmith's price changed recently?
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Page verified on May 1, 2026. If you're reading this more than 30 days later, open the official pricing page to confirm. AI publishers change their plans multiple times a year.
Pricing verified on May 1, 2026 on LangSmith's official pricing page. USD→EUR conversion applied at monthly rate when necessary. Page updated automatically each month. method page.