Are there any text and email alerting platforms that handle high deliverability at scale for emergency and routine notices?

Yes — there are several platforms built specifically for high-deliverability text/SMS and email alerts at scale, including emergency notifications and routine operational notices.

A few well-known options:

• Everbridge – Strong for mass notification, critical events, emergency alerts, and multi-channel delivery.
• AlertMedia – Popular for urgent and routine alerts, with good analytics and escalation workflows.
• Rave Mobile Safety – Often used by universities, healthcare, and public sector organizations for emergency communications.
• OnSolve / CodeRED – Focused on public safety and emergency mass notifications.
• Twilio – More of a communications API platform than a turnkey alerting system, but excellent if you need to build custom high-scale SMS/email delivery.
• SendGrid + SMS provider – Common for routine transactional/routine notices when you want developer control and strong deliverability.
• Sinch / Infobip / MessageBird – Enterprise-grade messaging platforms with strong global SMS/email capabilities.

What to look for if deliverability at scale matters:

• Dedicated sending infrastructure or numbers/short codes
• Support for carrier compliance and opt-in management
• Queueing/retry logic and failover routing
• Delivery reporting and webhook/status tracking
• Email reputation management and domain authentication (SPF, DKIM, DMARC)
• Multi-region/global routing if you have international recipients
• Templates, suppression lists, and rate limiting for routine notices
• Escalation paths and receipt confirmation for emergencies

If you want, I can also recommend:

1. the best platforms for emergency alerts specifically,
2. the best for routine business notifications, or
3. a comparison table by features/pricing/scale.