Best Transactional SMS Software in 2026
Updated
In short: ClickSend SMS API is ranked #1 of 74 as of 4 October 2026, ahead of Mailchimp and Bandwidth Messaging API. The best-ranked option with a free plan is Mailchimp. The lowest first paid tier on this page is Plivo SMS API at $0.01/mo.
When a customer action or service update calls for a text, transactional SMS software is built to handle that message flow. Compare delivery status, two-way messaging, and webhooks, then check whether SMS API support fits your integration needs. Monthly message limits and pay-as-you-go availability can help you assess usage options; free plans and paid-from pricing add cost context. Twilio Programmable Messaging, Telnyx SMS API, and Plivo SMS API lead the ranking, with Infobip SMS API and ClickSend SMS API also among the early entries. Weigh these criteria against the message volume and response handling your workflows require.
74 transactional SMS software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 ClickSend SMS API Top pick · 6.9 
#2 Mailchimp Runner-up · 6.9 Free plan · Free
#3 Bandwidth Messaging API Also great · 6.8 - Free trial apiiOSmacOSWeb
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
- Webhooks
- Yes
RecognisedDocumentedFree planPlatforms - Free plan WebiOSAndroid
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiWeb
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
- Webhooks
- Yes
RecognisedDocumentedFree planPlatforms - apiWeb
- Free plan
- No
RecognisedDocumentedFree planPlatforms$500/mofirst paid tier About Telnyx SMS APIVisit site - Free planFree trial apiWebRecognisedDocumentedFree planPlatforms
- Free plan apiWeb
- Free plan
- No
RecognisedDocumentedFree planPlatforms - Free plan apiWeb
- Free plan
- No
RecognisedDocumentedFree planPlatforms$500/mofirst paid tier About Telnyx Text-to-Speech APIVisit site - Free plan apiWebRecognisedDocumentedFree planPlatforms
- Free plan Web
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms₹4,999/mofirst paid tier About 2Factor.in OTP APIVisit site - Free plan
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiWeb
- Free plan
- No
- Paid from
- 3 /mo
RecognisedDocumentedFree planPlatforms - Free trial apiWeb
- Free plan
- No
RecognisedDocumentedFree planPlatforms$0.01/mofirst paid tier About Plivo SMS APIVisit site - Free plan Web
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms$0.08/mofirst paid tier About SMSPortalVisit site - Free trial AndroidapiiOSWeb
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
- Webhooks
- Yes
RecognisedDocumentedFree planPlatforms - Free trial AndroidapiWeb
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
- Webhooks
- Yes
RecognisedDocumentedFree planPlatforms - AndroidiOSLinuxmacOSWebWindows
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
RecognisedDocumentedFree planPlatforms - apimacOSWebWindows
- Free plan
- No
RecognisedDocumentedFree planPlatforms - AndroidapiiOSWeb
- Free plan
- No
RecognisedDocumentedFree planPlatforms$119/mofirst paid tier About TrueDialogVisit site - Free trial apiWeb
- Free plan
- No
- Paid from
- 1.15 /mo
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
- Webhooks
- Yes
RecognisedDocumentedFree planPlatforms - WebiOSAndroid
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
- Webhooks
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiWeb
- Free plan
- No
RecognisedDocumentedFree planPlatforms€9/mofirst paid tier About smsmode RCS APIVisit site - Web
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
- Pay-as-you-go
- Yes
- SMS API
- Yes
- Delivery status
- Yes
- Webhooks
- Yes
RecognisedDocumentedFree planPlatforms
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which transactional SMS software is ranked first on Everything Xiaomi?
ClickSend SMS API is ranked #1 of 74 with a score of 6.9. Mailchimp is second and Bandwidth Messaging API third.
How many of these have a free plan?
8 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Plivo SMS API has the lowest first paid tier we found: $0.01/mo.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.