Prelude Transactional SMS API

No phone app

6.1No. 15 of 27
in Transactional SMS Software

Recognised40% of the score56
Phone app26% of the score0
Documented20% of the score70
Free plan14% of the score0

Free plan: Trial only
Runs on: api, Web

Summary

Prelude Transactional SMS API is ranked #15 of 27 in transactional SMS software on Samsung Mobile US Press. It runs on API, Web. There is no free plan. A free trial is offered.

Prelude Transactional SMS API plans and pricing

All plans

Pay as you go €0.05 once Per verification; SMS message costs are additional and vary by country. Country- and volume-based pricing · No hidden fees or subscriptions prelude.so · 4 Oct 2026

Compared on transactional SMS software

Pay-as-you-go: Yesprelude.so
SMS API: Yesprelude.so
Delivery status: Yesprelude.so
Webhooks: Yesprelude.so
Two-way messaging: Yesprelude.so

Facts

What it does: Prelude’s Transactional SMS API sends automated service messages such as OTPs, order confirmations, payment notifications, and reminders.prelude.so · 4 Oct 2026
API: The API uses REST and supports single or bulk message sending through POST requests.prelude.so · 4 Oct 2026
Routing: Prelude says it routes messages by region and carrier and supports delivery to over 230 countries.prelude.so · 4 Oct 2026
Message handling: The API automatically manages language and encoding and supports dynamic fields such as name, language, and time zone.prelude.so · 4 Oct 2026
Monitoring: The service provides delivery receipts, real-time message status, analytics, cost monitoring, and detailed API logs.prelude.so · 4 Oct 2026
Integration resources: Prelude offers technical documentation, code samples, sandbox testing, dashboard test numbers, and free credits for real message testing.prelude.so · 4 Oct 2026
Performance: Prelude advertises average delivery under three seconds, a delivery rate above 98%, and a 99.95% uptime SLA.prelude.so · 4 Oct 2026
Security: Prelude states that communications use HTTPS/TLS encryption and token-based API authentication, with hosting in U.S. and EU data centers.prelude.so · 4 Oct 2026
Privacy and compliance: Prelude says its infrastructure complies with GDPR and U.S. privacy standards and that only essential data is stored for delivery tracking.prelude.so · 4 Oct 2026
Certifications: Prelude’s Trust Center lists ISO 27001:2022 and SOC 2 Type 1 and Type 2 reports.trust.prelude.so · 4 Oct 2026
Support: Prelude offers human support via chat, email, and a dedicated Slack channel for integration, deliverability, webhook, and troubleshooting help.prelude.so · 4 Oct 2026
Pricing model: Pricing depends on destination country and sending volume, with no setup fees or minimum commitment stated on the product page.prelude.so · 4 Oct 2026