Alternatives

Vellum alternatives in 2026 (Braintrust, PromptLayer, Langfuse, HumanLoop, PromptHub)

Top Vellum alternatives in 2026: Braintrust (engineer eval pipelines), PromptLayer (prompt management + versioning), Langfuse (open-source obs + eval), HumanLoop (collaboration-first), PromptHub (prompt registry).

Why people search this

People look for Vellum alternatives because they want engineer-led eval (Braintrust), prompt-registry-first (PromptLayer), open-source obs (Langfuse), collaboration-first (HumanLoop), or prompt sharing (PromptHub).

The ranking

#1

Braintrust

Best for: Engineer eval pipelines, dataset-first  ·  Price: Free tier + usage

Engineer-led eval-first platform with dataset workflows, experiment diffs, Anthropic-credible.

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#2

PromptLayer

Best for: Prompt registry + version management  ·  Price: Free tier + paid

Prompt management + versioning + observability — focused on prompt registry as source of truth.

#3

Langfuse

Best for: Open-source self-host, full eval pipeline  ·  Price: Free OSS + cloud + enterprise

Open-source LLM observability + evals + dataset workflows + prompt versioning.

#4

HumanLoop

Best for: Cross-team collaboration, evals  ·  Price: Per-seat + paid

Collaboration-first prompt management with domain expert + engineer workflows + evals.

#5

PromptHub

Best for: Prompt sharing + versioning  ·  Price: Free tier + paid

Prompt registry with versioning, sharing, evals, and collaboration features.

FAQ

Engineer eval-first Vellum alternative?

Braintrust — dataset-first, used by Anthropic internally.

Open-source?

Langfuse — full open source.

Collaboration-first?

HumanLoop or Vellum — both prioritize cross-team workflows.

Related

Last updated: 2026-06-01.