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PromptLayer alternatives
3 tools to consider instead of PromptLayer, shown against it.
| PromptLayer | Humanloop | LangSmith | Lunary | |||||||||||||||||||||||||||
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| Vendor | PromptLayer | Humanloop | LangChain | Lunary | ||||||||||||||||||||||||||
| Pricing model | Free tier + paid plans | Quote only | Usage-based | Free tier + paid plans | ||||||||||||||||||||||||||
| Free tier | Yes | Yes | Yes | Yes | ||||||||||||||||||||||||||
| Deployment | Cloud, Self-hosted | Cloud, Self-hosted | Cloud, Self-hosted | Cloud, Self-hosted | ||||||||||||||||||||||||||
| Open source | No | No | No | Yes | ||||||||||||||||||||||||||
| Best for | Teams that want prompts version-controlled and tested outside of application code, with logging tied to each version. | Product teams that need non-engineers to collaborate directly on prompts and evaluation, not just engineers viewing traces. | Teams already building on LangChain/LangGraph that want tracing and evaluation from the same vendor. | Teams with EU data-residency or GDPR requirements who want self-hosted or Europe-hosted LLM observability. | ||||||||||||||||||||||||||
| Pricing | Free plan caps users, monthly requests, and eval executions; Pro and Team are monthly subscriptions with pay-as-you-go request overage; Enterprise is custom with self-hosted or single-tenant deployment.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | A capped free trial (limited members, eval runs, and monthly logs) is available for evaluation; beyond that, pricing is negotiated directly with sales and not published.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | Free Developer tier includes a monthly trace allowance per seat, then usage-based charges for compute (LCU) and storage (LSU); Plus adds paid seats and deployment features; Enterprise is custom with self-hosted options.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | Free, self-hosted-only Community Edition; hosted Team plan is priced per user per month with a monthly event allowance and overage; Enterprise is custom (cloud or self-hosted); a separate Agency plan serves multi-client consultancies.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | ||||||||||||||||||||||||||
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