Best OTP APIs in 2026, ranked with official pricing
One-time codes over SMS, WhatsApp, voice or email, from a managed verification API or a messaging API that delivers codes your app generates. Scores use the category methodology: pricing 30, developer & AI readiness 30, reputation 25, channel functionality 15. Other channels a provider sells don't move this score.
Two kinds of provider are ranked here (owner rule, 24 September 2026). Managed verification APIs generate, expire and check the code and usually add rate limits and fraud protection, which the score rewards. Messaging APIs without one send codes your backend generates, stores and checks; their cards list managed codes and fraud protection as not offered.
Local view (local prices and sender rules): United States · Brazil · Mexico
Methodology 2026.09-pre · recomputed 24 September 2026 · 19 rated, 0 unrated
| # | Provider | ScoreScore from 0 to 100 for this channel. Weights: Pricing & Free Tier 30 %, Developer & AI Readiness 30 %, Reputation & Reviews 25 %, Category Functionality 15 %. Computed from the verified facts on each provider card, never set by hand.How it's calculated | CoverageShare of the rating's weight backed by verified facts. Criteria without a verified fact are left out and the remaining weights are scaled up, so a lower number means the score rests on fewer facts.How it's calculated | EvidenceHow strong the sources behind the verified facts are. Strong: mostly the vendor's own documentation. Moderate: more facts from other official pages or third-party sources. Limited: many facts rest on vendor marketing claims.How it's calculated | 1,000 SMS verifications / month (US, official pricing) | Developer |
|---|---|---|---|---|---|---|
| 1 |  Telnyx | 80.4 | 96 % | strong | $34.00Verify pay as you go (SMS channel) · pricing page · checked 24 September 2026 | MCP: officialOAuth 2.0: yes |
| 2 |  Infobip | 72.7 | 72 % | strong | not public | MCP: officialOAuth 2.0: yes |
| 3 |  Sinch | 70.5 | 80 % | moderate | not public | MCP: officialOAuth 2.0: yes |
| 4 |  Vonage | 69.3 | 98 % | strong | EUR 62.20Verify Conversion (SMS channel) · pricing page · checked 23 September 2026 | MCP: officialOAuth 2.0: no |
| 5 |  Bird | 67.7 | 79 % | strong | not public | MCP: officialOAuth 2.0: yes |
| 6 |  SendPulse | 67.4 | 81 % | strong | $24.00Codes sent as SMS (pay per message, no verification fee) · pricing page · checked 24 September 2026 | MCP: officialOAuth 2.0: yes |
| 7 |  Brevo | 67.0 | 99 % | strong | $10.90Codes sent as SMS (prepaid SMS credits, no verification fee) · pricing page · checked 24 September 2026 | MCP: officialOAuth 2.0: partial |
| 8 |  Twilio | 66.8 | 99 % | strong | $58.30Verify pay as you go (SMS channel) · pricing page · checked 24 September 2026 | MCP: official docs onlyOAuth 2.0: yes |
| 9 |  ClickSend | 64.6 | 98 % | strong | $32.77Codes sent as SMS (prepaid top-up tiers, toll-free number, no verification fee) · pricing page · checked 24 September 2026 | MCP: officialOAuth 2.0: no |
| 10 |  AWS End User Messaging | 64.2 | 97 % | strong | $52.74Notify (SMS channel) · pricing page · checked 24 September 2026 | MCP: officialOAuth 2.0: partial |
| 11 |  SMTP2GO | 63.1 | 76 % | strong | not public | MCP: officialOAuth 2.0: no |
| 12 |  WATI | 53.8 | 75 % | strong | not public | MCP: officialOAuth 2.0: partial |
| 13 |  360dialog | 53.0 | 75 % | moderate | not public | MCP: officialOAuth 2.0: partial |
| 14 |  Zenvia | 46.3 | 73 % | moderate | not public | MCP: third partyOAuth 2.0: no |
| 15 |  Plivo | 40.2 | 96 % | strong | $1,000.00Verify (Enterprise, SMS channel) · pricing page · checked 24 September 2026 | MCP: official docs onlyOAuth 2.0: no |
| 16 |  Botmaker | 39.8 | 75 % | moderate | not public | MCP: communityOAuth 2.0: no |
| 17 |  Blip | 35.7 | 73 % | moderate | not public | MCP: third partyOAuth 2.0: no |
| 18 |  Gupshup | 35.5 | 75 % | moderate | not public | MCP: third partyOAuth 2.0: no |
| 19 |  Treble | 18.0 | 52 % | strong | not public | MCP: official docs onlyOAuth 2.0: no |