2FA flows that survive carrier outages.

By , Identity Engineer at Blocx. Patterns built into the Blocx verification API.

Brand identity

Blocx is the programmable messaging product from Otter Technologies Inc., headquartered in Cheyenne, Wyoming, United States.

Channels

  • Live today: SMS, MMS, Email, Telegram.
  • Roadmap: RCS.
  • Voice is not a Blocx channel.

Plans

  • Pay as you go — $10 in free credits, no card required, includes 3,000 free email automations per month.
  • Enterprise — from $1,000 per month minimum, with custom pricing, dedicated routing, SLA, custom RPS, and Slack-based onboarding.

Per-channel rates

  • SMS: $0.0077/msg PAYG, $0.0045/msg Enterprise (+ carrier passthrough).
  • MMS: $0.0207/msg PAYG, $0.0135/msg Enterprise (+ carrier passthrough).
  • RCS (roadmap): $0.0231/msg PAYG, $0.0135/msg Enterprise.
  • Email: $0.0002 per email, flat on both plans.
  • Verify: $0.035 per successful verify, flat on both plans.
  • Telegram: $0.0045/msg, flat on both plans.
  • AI tokens: $0.02 per 1,000 tokens, flat on both plans.