apio

Categories · Communications & Messaging

SMS APIs

Every sms apis we track, compared.

TL;DR: Top pick: Twilio Programmable Messaging. 10 APIs compared, 1 with a free tier; cheapest published entry $0.004 message (Telnyx SMS API). Why →

Looking for a recommendation? See the Best SMS APIs guide. · Last verified 2026-06-10

What is an SMS API?

An SMS API lets developers integrate sms apis capabilities over HTTP. The SMS APIs below are compared on pricing, compliance, capabilities, and developer experience from structured, cited data.

To be listed as a SMS API, an API must have a public HTTP endpoint and published, sourced data. Listings are ranked on those verifiable fields, never on payment.

Sorted by a data-readiness score (published pricing, free tier, self-serve access, compliance, webhooks/sandbox, capability breadth). No paid placement. How we rank. ✓ yes · ✗ no · · unknown.

10 APIs compared
#APIPricingFreeSelf-serveSOC 2HIPAAGDPRWebhooksActions
1Twilio Programmable MessagingUsage✗✓Type II✓✓✓25
2Sinch SMS APIUsage✗✓Type II✓✓✓22
3BirdUsage✗✓Type II✓✓✓14
4Telnyx SMS APIUsage✗✓Type II✓✓✓17
5Infobip SMS APIUsage✗✓Type II✓✓✓11
6Vonage SMS APIUsage✗✓Type II✓·✓4
7AWS End User MessagingUsage✓✓Type II··✗112
8MSG91Usage✗✓Type II·✓✓18
9PlivoUsage✗✓Type II✓✓✓6
10Bandwidth Messaging APIHybrid✗✗Type II✓✓✓7

The APIs

  • #1 Twilio Programmable Messaging

    83 / 100

    One Messaging API to reliably reach 7B+ devices

    PricingUsage · from $0.0083 message segment · free tier ✗
    TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSS
    Used byDuolingo, Lyft, Yelp, Intuit
    Avoid ifYou want to try it free before paying

    Twilio Programmable Messaging profile →

  • #2 Sinch SMS API

    74 / 100

    "Simple, secure SMS API for global reach"

    PricingUsage · from $0.0078 message · free tier ✗
    TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSS
    Used byAAA, FirstBank, Florida Orthopaedic Institute, Omnisend
    Avoid ifYou want to try it free before paying

    Sinch SMS API profile →

  • #3 Bird

    62 / 100

    The global SMS API that scales with you

    PricingUsage · free tier ✗
    TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001
    Used byAirwallex, Binance, Zillow, Aramex
    Avoid ifYou want to try it free before paying

    Bird profile →

  • #4 Telnyx SMS API

    82 / 100

    Carrier-grade SMS API with direct routing. No aggregator markup, no middleman margin. Programmable messaging on infrastructure Telnyx owns end-to-end.

    PricingUsage · from $0.004 message · free tier ✗
    TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSS
    Used byAlibaba, Ooma, Neon Health, 42Chat
    Avoid ifYou want to try it free before paying

    Telnyx SMS API profile →

  • #5 Infobip SMS API

    61 / 100

    Send business text messages with a leading SMS service provider

    PricingUsage · free tier ✗
    TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001
    Used byBT, Podravka, Rubeus, Rule
    Avoid ifYou want to try it free before paying

    Infobip SMS API profile →

  • #6 Vonage SMS API

    75 / 100

    Our SMS API helps you create customer journeys through conversations - even within the context of your app.

    PricingUsage · from $0.0081 message · free tier ✗
    TrustSOC 2 Type II · HIPAA · ISO 27001 · PCI DSS
    Used byDomino's Pizza, InTouch Health, Story Corps, The Princeton Review
    Avoid ifYou want to try it free before paying

    Vonage SMS API profile →

  • #7 AWS End User Messaging

    72 / 100

    AWS End User Messaging empowers developers to integrate scalable and reliable messaging capabilities into their applications. AWS End User Messaging helps you engage your customers by sending them SMS, voice messages, WhatsApp, and push notifications.

    PricingUsage · from $0 push notification · free tier ✓
    TrustSOC 2 Type II · ISO 27001
    Used byWise, Granicus, Zerodha, Provincial Health Services Authority

    AWS End User Messaging profile →

  • #8 MSG91

    64 / 100

    "Engage your customers globally with quick, scalable and customizable messages."

    PricingUsage · from $0.0065 1 SMS · free tier ✗
    TrustSOC 2 Type II · GDPR · ISO 27001
    Used byRazorpay, Unacademy, Ixigo, Policy Bazaar
    Avoid ifYou want to try it free before paying

    MSG91 profile →

  • #9 Plivo

    63 / 100

    Compliant, reliable SMS for verification & customer engagement

    PricingUsage · from $0.0077 message · free tier ✗
    TrustSOC 2 Type II · HIPAA · GDPR · PCI DSS
    Used byMeta, Uber, Trip.com, Zomato
    Avoid ifYou want to try it free before paying

    Plivo profile →

  • #10 Bandwidth Messaging API

    51 / 100

    The Bandwidth Messaging API is used to send SMS and MMS messages over HTTP protocol.

    PricingHybrid · from $0.004 message · free tier ✗
    TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001
    Used byGoogle, Microsoft, Cisco, RingCentral
    Avoid ifYou need to start building today without contacting sales

    Bandwidth Messaging API profile →