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MailOnce vs Announcer

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

MailOnce compared with Announcer
DetailMailOnce logo MailOnceAnnouncer logo Announcer
What it doesTemporary email for verification messages and OTP codes in a browser-scoped, auto-expiring inbox Transactional email API for developers, run from Sweden
StageNot given Not given
FoundedNot given Not given
Based inNot given SE
Pricing modelFree Freemium
PricingNot given Free: €0/month with 100 messages a day and 2 domains. Pro: €19/month for 10,000 messages a month and 10 domains, then €1 per 1,000 messages. Scale: €99/month for 100,000 messages a month and 100 domains, then €0.80 per 1,000 messages. Prices exclude VAT.
Key features
  • Instant temporary email creation without signup
  • Auto-expiring inbox after one hour, extendable to three hours
  • Automatic OTP code detection and copying
  • Verification link detection and opening
  • Custom email address selection
  • Secure device linking with QR code approval
  • Real-time message delivery without manual refresh
  • Multiple domain options for custom addresses
  • Safe email change with confirmation step
  • DKIM signing on every message
  • Delivery, bounce and complaint tracking
  • No message body storage
  • No tracking pixels or link rewriting
  • HTTP API with official SDKs
  • SMTP support
  • Webhooks with HMAC-SHA256 signing
  • MCP and A2A agent support
  • One-click account deletion
What makes it different
  • No account creation required to use the service
  • Privacy-focused design with clear lifecycle boundaries
  • Security claims tied to implemented controls, not empty promises
  • Designed for practical utility rather than unnecessary features
  • Message bodies never stored, only envelope and subject line kept
  • No tracking pixels, no link rewriting
  • Free plan is permanent, not a trial
  • Single server in Stockholm, minimal third-party access
  • 99.5% uptime commitment on paid plans
Community votes00
DR (Domain Rating by Ahrefs)2 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)40
Citation Flow (Majestic)224
Referring domains (Majestic)101

4 details filled in for both companies.

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