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HelpStack vs InputBuffer

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

HelpStack compared with InputBuffer
DetailHelpStack logo HelpStackInputBuffer logo InputBuffer
What it doesAI-powered shared inbox for unified customer support across email, chat, and social channels AI-organized feedback for anyone building software
StageNot given Not given
FoundedNot given Not given
Based inSI US
Pricing modelFreemium Contact for pricing
PricingFree plan: €0 forever with 500 tokens per month and up to 10 channels. Starter: €29 per month with 8,000 tokens per month. Growth: €79 per month with 30,000 tokens per month. Enterprise: Custom pricing with unlimited tokens. All prices exclude VAT. Custom pricing based on needs
Key features
  • Unified inbox for email, Facebook, Instagram, WhatsApp, and website chat
  • AI reply suggestions that agents approve with one click
  • Automatic translation across 40+ languages
  • Real-time message synchronization
  • Smart search across conversations
  • Conversation threading and agent assignment
  • Free chat widget for website
  • AES-256 encryption and GDPR compliance
  • Website crawling to train AI agent
  • White-label option
  • Automatic AI categorization without manual tagging
  • Natural language query interface for feedback analysis
  • Collects feedback from users, agents, and custom systems
  • Web widget for in-app feedback collection
  • API for feedback submission and integration
  • Agent feedback reporting with embedded instructions
  • Feedback answers cited with source items
  • Planned integrations with GitHub, Slack, and app stores
What makes it different
  • Built by the team behind SpaceGuardian with reliability-first approach from satellite operations
  • Permanent free plan with no credit card required
  • EU-hosted data with 99.9% uptime SLA
  • Less than 2 second AI reply time
  • Captures feedback from AI agents as well as users
  • Automatic categorization without requiring manual tagging setup
  • Query feedback in plain English with cited answers
  • Single unified inbox for all feedback sources
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)2 −3 (down) since last check2 no change since last check
Trust Flow (Majestic)101
Citation Flow (Majestic)2422
Referring domains (Majestic)839

6 details filled in for both companies.

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