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PromptPex vs Vellum

PromptPex

5.8#19 in ai prompt generators
WebLinuxmacOSSelf-hosted
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Vellum

8.7#1 in ai agent platformsFrom $30 a month
Free planAndroidiOSWebAPI
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What both publish

FactPromptPexVellum
IntegrationsPromptPex documents exports and integrations for OpenAI Evals, Azure OpenAI Stored Completions, GitHub Models Evals, and GitHub Actions.OAuth integrations include GitHub, Notion, Linear, Airtable, Spotify, Gmail, Google Calendar, Slack, and other services, while MCP servers provide additional tools.

PromptPex plans

No prices published.

Vellum plans

  • BaseFree
  • FreeFree
  • Mighty$30 a month
  • Custom$50 a month
  • Super$100 a month
  • Ultra$200 a month

Pick PromptPex if…

It suits developers maintaining prompts in source repositories who need generated tests and cross-model evaluation. It is intended for research rather than unreviewed downstream applications.

Pick Vellum if…

Vellum suits individuals seeking an assistant for files, calendars, email, code, and computer tasks. It is characterized as a personal assistant rather than a team or shared company tool.

Charts they share