Best SMS APIs

Best overall: Twilio Programmable Messaging

████████░░ 83 / 100 data score

One Messaging API to reliably reach 7B+ devices

From $0.0083 message segment.

How it stacks up

• ✓ Sinch SMS API starts lower at $0.0078 per message vs $0.0083 for Twilio Programmable Messaging.
• ✓ For coding-agent use, Twilio Programmable Messaging scores higher on agent-friendliness (85 vs 45).
• ✓ Telnyx SMS API starts lower at $0.004 per message vs $0.0083 for Twilio Programmable Messaging.

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box.

Avoid if: You want to try it free before paying

Twilio Programmable Messaging profile → · Twilio Programmable Messaging vs Sinch SMS API →

At a glance

Quick pick by use case

If you only have thirty seconds, find your situation:

• If you want the strongest all-round pick, pick Twilio Programmable Messaging - our default pick: strongest across pricing, trust and breadth.
• If you want to start free, pick AWS End User Messaging - the only genuinely free option here. You pay $0 for the first 1,000,000 push notifications that you send each month, and $0.00….
• If you're buying for a regulated or large team, pick Twilio Programmable Messaging - for regulated or large teams: SOC 2 Type II, HIPAA, published SLA.
• If you want the lowest published entry price, pick Bandwidth Messaging API - from $0.004 message to start; compare on your real usage, not the entry price.
• If you're wiring this into coding agents or AI workflows, pick Twilio Programmable Messaging - easiest to wire up programmatically: MCP server + llms.txt.
• If you want the broadest documented surface, pick AWS End User Messaging - 112 documented actions; breadth isn't quality, but it's the most to build on.

The picks in depth

• #1 Twilio Programmable Messaging

  ████████░░ 83 / 100
  • Best overall
  • Best for enterprise
  • Best for agents

  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

  Strengthstransparent public pricing · self-serve signup · SOC 2 Type II

  Avoid ifYou want to try it free before paying

  ScoresAgent 85 · Pricing 85 · Setup 75 · Docs 70 · Procurement 85 · Trust 100

  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

  Strengthstransparent public pricing · self-serve signup · SOC 2 Type II

  Avoid ifYou want to try it free before paying

  ScoresAgent 75 · Pricing 85 · Setup 75 · Docs 25 · Procurement 85 · Trust 100

  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

  Strengthstransparent public pricing · self-serve signup · SOC 2 Type II

  Avoid ifYou want to try it free before paying

  ScoresAgent 45 · Pricing 60 · Setup 75 · Docs 45 · Procurement 75 · Trust 70

  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

  Strengthstransparent public pricing · self-serve signup · SOC 2 Type II

  Avoid ifYou want to try it free before paying

  ScoresAgent 80 · Pricing 85 · Setup 60 · Docs 80 · Procurement 85 · Trust 100

  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

  Strengthstransparent public pricing · self-serve signup · SOC 2 Type II

  Avoid ifYou want to try it free before paying

  ScoresAgent 50 · Pricing 60 · Setup 60 · Docs 50 · Procurement 75 · Trust 70

  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

  Strengthstransparent public pricing · self-serve signup · SOC 2 Type II

  Avoid ifYou want to try it free before paying

  ScoresAgent 65 · Pricing 85 · Setup 75 · Docs 55 · Procurement 85 · Trust 85

  Vonage SMS API profile →

• #7 AWS End User Messaging

  ███████░░░ 72 / 100
  • Only free option
  • Broadest surface

  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

  Strengthstransparent public pricing · a free tier · self-serve signup

  ScoresAgent 45 · Pricing 100 · Setup 100 · Docs 25 · Procurement 100 · Trust 60

  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

  Strengthstransparent public pricing · self-serve signup · SOC 2 Type II

  Avoid ifYou want to try it free before paying

  ScoresAgent 45 · Pricing 85 · Setup 60 · Docs 55 · Procurement 85 · Trust 55

  MSG91 profile →

See all 10 SMS APIs compared →

How we rank

The headline score is the average of six 0-100 axes computed only from each API’s published, sourced fields: agent-friendliness, pricing transparency, setup speed, docs quality, procurement ease, and trust readiness. An unknown signal scores 0 for its axis - we credit what’s confirmed, never guess. The score is one input, not the verdict: we lead with each pick’s trade-off, and where a job has only one real option we say so rather than crown it. Full method on the methodology page.

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• ✓ Every field cited. Each profile links the source for every claim - check us.
• ✓ Public audit log. Every change to this data is recorded per field, with who changed it and why.
• ✓ Published, deterministic methodology. The score is a formula over the same fields you can see - recompute it yourself.
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• ✓ No reviews yet - and we say so rather than synthesizing them.

Frequently asked questions