Promptfoo vs Vellum
On the evidence we track, Vellum leads this comparison with a composite score of 67/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for prompt management. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Promptfoo
A comprehensive LLM security testing solution that automatically scans for vulnerabilities such as prompt injections and jailbreaks through dynamic red teaming. Offers both open-source software for local testing and enterprise SaaS with team collaboration, continuous monitoring, and compliance dashboards.
Vellum
LeaderA cloud-based AI assistant that maintains continuous context about your preferences and history, accessible via web, desktop, mobile, and messaging platforms, capable of automating tasks like email, calendar management, and web browsing with your explicit approval for each action.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Promptfoo
Free open-source Community tier; Enterprise and On-Premise plans with custom pricing
- CommunityFree
- All LLM evaluation features
- All model providers and integrations
- Red teaming (10k probes/month)
- Custom integration with your own app
- Run locally or self-host on your own infrastructure
- +2 more
- EnterpriseContact sales
- All Community features
- Custom red teaming limits
- Team sharing & collaboration
- Continuous monitoring
- Centralized security/compliance dashboard
- +6 more
- On-PremiseContact sales
- Complete data isolation
- On-premise deployment
Vellum
LeaderFree tier with credits, paid plans from $30/mo
- FreeFree
- Free starter credits
- Multi-platform access
- Memory and context
- Paid$30/mo
- Larger machine
- More storage
- Bundled credits
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Promptfoo
- OpenAI
- Anthropic
- Google (Gemini)
- DeepSeek
- MCP (Model Context Protocol)
- CI/CD pipelines
- Webhooks
- Agent frameworks
- CI/CD platforms
- GitHub
- Python providers
Vellum
Leader- Gmail
- Google Calendar
- Slack
- Telegram
- Web browsing
- Computer control
- Phone calls
- Image generation
- Coding
- App building
- Task management
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.