SMS送信によるパスワード認証 API

ユーザ登録型アプリのSMS送信によるパスワード認証に必要なSMS-APIリスト(抜粋)

API API Features Geographical Coverage Pricing Easy to Use?
Nexmo API Send and receive bulk SMS, private SMS, notifications, phone number verification Global Free inbound SMS and $0.0069 per outbound SMS (U.S.) Yes
The TeleSign Score API Provides a score of 0 to 1,000 for identifying fraudulent phone numbers Global Free and varying paid plans from $25 to $500 per month Yes
The TeleSign SMS API Delivery notifications, reminders, one-time passwords, two-way private SMS, two-factor authentication Global Free and varying paid plans from $10 to $250 per month Yes
The Twilio SMS API Sending short codes, smart content handling, text message delivery intelligence Global Varying paid plans from $10 to $250 per month Yes
Twilio Lookup API Get information about phone numbers, point out local-friendly phone number formats, recognize caller names. Global Pay-per-use pricing of $0.005 or $0.01 per request Yes
Twilio Verify Phone Number API Request a verification code to be sent to a user via SMS or voice Global Varying paid plans from $10 to $200 per month Yes
SMSly – SMS to INDIA API Get OTP SMS delivery services, secured SMS routes, priority SMS gateway routes, live delivery reports India only Free and varying paid plans from $25.99 to $189.99 per month Yes
MessageBird SMS Gateway API Send and receive text messages, verify message delivery status, lookup for invalid phone numbers Global Free Yes
Octopush SMS API Delivery reports, 2-way SMS, 2-factor authentication, push SMS, scheduled SMS Global Free Yes
FreeSMS8 API Send unlimited text messages, group SMS, classified messages, scheduled messages India Only Free Yes

Vonage SMS API

OVHcloud API