Best Alternatives to Vellum
Explore 5 top-rated alternatives to Vellum in the llm development platforms category. Compare features, pricing, and find the perfect fit for your needs.
About Vellum
Development platform for production LLM apps: prompt engineering, evaluation, retrieval, and workflow orchestration in one workspace.
Freemium
Top Recommended Alternatives
Braintrust
AI Evaluation
From
FreeBraintrust review 2026: unified evals, prompt workbench, observability, and AI proxy used by OpenAI, Stripe, Notion — features, pricing, pros, cons.
Key Strengths:
- ✓Genuinely consolidates four toolchains into one — fewer vendors, one UI, one bill (above the proxy line)
- ✓Eval review UI is best-in-class for diffing prompt and model changes against curated datasets
Langfuse
LLM Observability
From
FreeOpen-source LLM engineering platform that captures traces, runs evaluations, and helps teams analyze cost, latency, and quality across production AI apps.
Key Strengths:
- ✓Purpose-built LLM data model — traces, generations, evaluations — beats generic APM
- ✓MIT-licensed and self-hostable, which clears procurement in regulated industries
Helicone
AI Monitoring
From
FreeOpen-source LLM observability and gateway platform offering one-line integration, request logging, prompt management, evals, and a multi-provider proxy.
Key Strengths:
- ✓Truly one-line integration — fastest path to LLM logging in the market
- ✓Open source under Apache 2.0 with viable self-host story (not just open-core marketing)
Portkey
AI Gateway
From
FreePortkey is an AI gateway for routing, observing, securing, and governing production traffic across model providers, agents, and MCP tools. It centralizes fallbacks, guardrails, prompt operations, cost tracking, and access policy for engineering teams.
Key Strengths:
- ✓Centralizes routing, fallbacks, observability, and policy
- ✓Supports multi-provider model access and MCP governance
StackAI
Enterprise AI Agent Platform
From
FreeEnterprise agent factory for governed low-code workflows
Key Strengths:
- ✓Visual construction can shorten iteration between business operators and technical teams
- ✓Human-review nodes support safer automation of regulated or high-impact processes
Quick Comparison
Why Consider Vellum Alternatives?
While Vellum is a popular choice in the llm development platforms category, exploring alternatives can help you find a tool that better matches your specific needs, budget, or workflow preferences.
Common reasons to explore alternatives include:
- Different pricing models or more affordable options
- Specific features that Vellum may not offer
- Better integration with your existing tools
- Performance or user experience preferences
- Regional availability or support requirements
Compare the tools above to find the best fit for your specific use case.
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