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Inbound vs Cendro by Oakbox

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

Inbound compared with Cendro by Oakbox
DetailInbound logo InboundCendro by Oakbox logo Cendro by Oakbox
What it doesEmail infrastructure for developers to send, receive, and reply to emails through one API Private AI that runs on your computer to sort mail, find to-dos and bills, and answer questions across all your email
StageNot given MVP
FoundedNot given 2026
Based inUS US
Pricing modelPaid Freemium
PricingDefault: $9/month for 5,000 emails/month with basic support; Pro: $15/month for 50,000 emails/month and 50 domains; Growth: $39/month for 100,000 emails/month and 300 domains; Scale: $79/month for 200,000 emails/month and unlimited domains. Additional domains cost $3.50/domain/month, and additional Not given
Key features
  • Transactional email sending for receipts, notifications, and transactional messages at scale
  • Receive email to endpoints as structured JSON with headers, text, HTML, and files
  • Threaded conversations with full context across replies and participants
  • Webhook delivery with logs and one-click retries
  • API keys, webhook verification tokens, and rate limits for security
  • Guard rules to filter and route incoming email with AI-evaluated rules on Pro plans and above
  • TypeScript SDK and REST API
  • Spam filtering with verdicts and bounce suppression list
  • Custom domain configuration with guided DNS setup
  • AI-powered inbox sorting into five categories: Do Now, Needs Decision, Waiting, Information, and Skim later
  • Support for Gmail, Outlook, Microsoft 365, Yahoo, iCloud, Fastmail, and IMAP
  • Encryption with passphrase or computer login
  • Search and read archived PST and MBOX files
  • Local AI model selection based on computer hardware
  • Read-only access with no modifications to mailboxes
  • Project organization with mailboxes, keywords, notes, and pinned emails
What makes it different
  • One unified API for sending, receiving, and replying to emails in the same thread
  • Email automatically converted to structured JSON for easy processing
  • Unlimited mailboxes included on every plan
  • Affordable pricing starting at $9/month with no hidden fees
  • Email routing to any endpoint with catch-all support
  • AI runs entirely on your computer with no data sent to external servers or AI companies
  • Works offline with your existing email providers and archives
  • AI model automatically chosen based on your computer's capabilities
  • Answers with direct citations to specific emails and attachments
Community votes00
DR (Domain Rating by Ahrefs)51 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)70
Citation Flow (Majestic)330
Referring domains (Majestic)1170

5 details filled in for both companies.

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