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Vellum vs Helicone

VellumHelicone

Bottom line: Vellum for teams wanting an all-in-one build-evaluate-deploy platform; Helicone for teams wanting simple, cheap LLM logging.

VellumVellum

Build, evaluate, and deploy LLM apps and agents with confidence.

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HeliconeHelicone

Open-source LLM observability and AI gateway in one line of code.

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Votes00
PricingFreemiumFreemium
CategoryLlm ObservabilityLlm Observability
Tags
llmopsai-agentsprompt-engineeringevaluationworkflow
llm-observabilityai-gatewayopen-sourcemonitoringcaching
Best for
  • Teams wanting an all-in-one build-evaluate-deploy platform
  • Cross-functional groups with technical and non-technical members
  • Regulated sectors needing VPC or HIPAA options
  • Teams wanting simple, cheap LLM logging
  • Developers self-hosting an open-source gateway
  • Cost and usage monitoring across providers
Pros
  • Combines prompt, workflow, evaluation, and deployment in one platform
  • Visual workflow builder lowers the barrier for cross-functional collaborators
  • Solid evaluation and testing tooling for pre-production quality gates
  • Multi-provider model support avoids lock-in
  • Free tier lets teams trial without a credit card
  • Extremely easy integration via a one-line base-URL swap
  • Open source under Apache 2.0 and free to self-host
  • Tiny Docker image that runs almost anywhere
  • Gateway features like caching, failover, and rate limiting cut cost and improve reliability
  • Generous free tier of 10,000 requests per month
Cons
  • Pricing is opaque and sales-led, making budgeting hard
  • Not open source, and self-hosting is locked to Enterprise
  • Free tier is quite limited in credits, documents, and seats
  • Smaller company and funding than infrastructure incumbents
  • Frequent repositioning can mean shifting product focus
  • Product is in maintenance mode after the Mintlify acquisition, with no roadmap
  • Long-term hosted-service viability is uncertain and migration may be needed
  • Usage-based overages mean the Pro price is a floor, not a cap
  • Short retention on lower tiers (7 days free, 30 days Pro)
  • Large price jump from Pro to Team for compliance features

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