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Appsmith vs Seamless.ai: 2026 Comparison

Appsmith Seamless.ai
Overview An open-source low-code platform for building internal tools with a visual builder and extensive data source connectors. Seamless.ai is a real-time search engine for B2B sales leads that uses AI to find verified contact information. It helps sales teams build accurate lead lists with phone numbers and email addresses.
Pricing Freemium (Free-$40/user/month) Freemium ($0-147/user/mo)
Key Features
  • Open source
  • Visual builder
  • Data source connectors
  • JavaScript widgets
  • Git sync
  • RBAC
  • Audit logs
  • Custom widgets
  • Real-time contact search
  • email finder
  • phone numbers
  • Chrome extension
  • CRM integration
  • list building
  • buyer intent
Pros
  • Open source
  • Self-hosted option
  • Good community
  • Many connectors
  • Large database
  • Real-time verification
  • Good phone numbers
  • Easy to use
Cons
  • UI can be janky
  • Learning curve
  • Community support varies
  • Fewer pre-built components
  • Aggressive sales tactics
  • Data accuracy inconsistent
  • Pushy upselling

Appsmith

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Seamless.ai

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