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Dify vs Vellum

DifyVellum

Bottom line: Dify for teams building LLM apps and agents quickly; Vellum for teams wanting an all-in-one build-evaluate-deploy platform.

DifyDify

Open-source platform for building production-ready LLM apps and agents.

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VellumVellum

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

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Votes00
PricingFreemiumFreemium
CategoryCodingCoding
Tags
llmopsopen-sourceai-agentsragworkflow
llmopsai-agentsprompt-engineeringevaluationworkflow
Best for
  • Teams building LLM apps and agents quickly
  • Organizations with data-residency needs
  • Developers who want an open-source, self-hostable stack
  • 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
Pros
  • Genuinely open-source and self-hostable for strong data control
  • All-in-one: workflow, RAG, agents, and prompt IDE in one workspace
  • Low-code visual canvas lowers the barrier to building
  • Broad model and provider support, including self-hosted models
  • Large, active community and a marketplace ecosystem
  • 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
Cons
  • License is not fully permissive; multi-tenant resale and branding removal are prohibited
  • Real cost is dominated by separate LLM token spend, not the platform fee
  • Message-credit model on paid tiers can feel limiting at scale
  • Self-hosting adds ops and maintenance burden
  • Free tier's one-time credits are essentially a demo allowance
  • 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

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