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Airbase vs Plunk: 2026 Comparison

Airbase Plunk
Overview A comprehensive spend management platform combining corporate cards, bill pay, expense reimbursements, and procurement. Open-source email platform combining transactional emails and marketing campaigns with a developer-friendly approach.
Pricing Subscription (Custom pricing) Freemium ($0-custom/mo)
Key Features
  • Corporate cards
  • Bill pay
  • Expense management
  • Procurement
  • Virtual cards
  • Approval workflows
  • Accounting automation
  • Analytics
  • Transactional email
  • Marketing email
  • Open-source
  • API
  • Automation
  • Analytics
  • Contacts
Pros
  • Comprehensive spend management
  • Good approval workflows
  • Strong accounting sync
  • Virtual cards
  • Open-source
  • Developer friendly
  • Transactional + marketing
  • Free self-hosted
Cons
  • Expensive
  • Complex setup
  • Enterprise-focused
  • Custom pricing only
  • Very new
  • Limited features
  • Small community