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Ember AI vs WBX Sandbox

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

Ember AI compared with WBX Sandbox
Detail Ember AI WBX Sandbox
What it doesAI sales assistant that drafts client follow-ups in your voice from your real inbox Secure execution for AI agents in isolated Firecracker microVMs or WebAssembly
StageGrowing Not given
FoundedNot given Not given
Based inNot given CZ
Pricing modelNot given Not given
PricingFree plan with 300 one-time credits. Growth plan at $79/month with 100 managed contacts and 1,000 credits/month. Pro plan at $329/month with 500 managed contacts and 5,000 credits/month. Enterprise at custom pricing with 1,000+ managed contacts. Unlimited seats on all plans. Free plan: no card required, 5 concurrent sandboxes, up to 1 hour per sandbox, one-time welcome credit. Pro: $49.00/month (excl. VAT) with $25.00 usage credit, 25 concurrent sandboxes, up to 24 hours per sandbox, 100 vCPU/100 GB RAM total. Team: $119.00/month (excl. VAT) with $50.00 usage credit, 10
Key features
  • Reads email and CRM to identify best prospects
  • Drafts personalized emails in your voice from actual conversation history
  • Approval-first workflow with optional auto-send
  • Contact enrichment and profile updates
  • Learns your writing style through approvals and edits
  • Shared team view with unified inbox for outreach
  • Integrates with Gmail, Outlook, HubSpot, and Attio
  • Sends from your real existing inbox
  • Isolated Firecracker microVMs with own kernel and filesystem
  • Background jobs that survive disconnects
  • Batch execution with up to 1,000 jobs and dependency passing
  • WebAssembly jobs starting in milliseconds without VM boot
  • Budget Guard with cost reserves and limits
  • Execution receipts with runtime, isolation, resources and file hashes
  • Native MCP server integration for ChatGPT and Claude
  • Compact log digests instead of full 5,000-line logs
  • Server-side job waiting with signed webhooks
  • Verified package cache for PyPI, npm, Go and Rust
What makes it different
  • Treats every relationship individually rather than using fixed cadences
  • No sequences or templates required
  • Approval required by default, not auto-send
  • Works on top of existing CRM without migration
  • Continuous proactive relationship management at scale
  • Two runtimes with honest isolation labeling
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)Not checked yet no change since last check2 no change since last check
Trust Flow (Majestic)40
Citation Flow (Majestic)60
Referring domains (Majestic)90

4 details filled in for both companies.

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