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 BulkGate. 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 account update needs a text message, transactional SMS software gives you features to compare for sending and handling replies. Compared on delivery status, free plan, monthly message limit, paid from, pay-as-you-go, SMS API, two-way messaging, and webhooks, these entries cover both delivery details and ways to connect messaging to other systems. Check ClickSend SMS API, Mailchimp, and BulkGate against the integration and message-volume needs you have. Two-way messaging and webhooks may matter when your workflow includes responses or event notifications. Free-plan availability, monthly limits, and the stated payment options help you assess costs alongside the features.
74 transactional SMS software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 ClickSend SMS API iPhone only RecognisedPhone appDocumentedFree plan 7.7 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 2 Mailchimp iPhone + Android RecognisedPhone appDocumentedFree plan 7.7Free
- 3 BulkGate Android only RecognisedPhone appDocumentedFree plan 7.0 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 4 Vonage SMS API iPhone + Android RecognisedPhone appDocumentedFree plan 6.9 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 5 TrueDialog iPhone + Android RecognisedPhone appDocumentedFree plan 6.8$119/mo
- 6 Sinch Verification API iPhone + Android RecognisedPhone appDocumentedFree plan 6.7 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 7 Roezan SMS API iPhone only RecognisedPhone appDocumentedFree plan 6.6 Pay-as-you-go: NoSMS API: YesDelivery status: Yes
- 8 Netgsm iPhone + Android RecognisedPhone appDocumentedFree plan 6.5 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 9 Textmagic iPhone + Android RecognisedPhone appDocumentedFree plan 6.5$0.05/mo
- 10 Bandwidth Messaging API No phone app RecognisedPhone appDocumentedFree plan 6.3 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 11 Telnyx SMS API No phone app RecognisedPhone appDocumentedFree plan 6.3$500/mo
- 12 Bird Verify No phone app RecognisedPhone appDocumentedFree plan 6.1Free
- 13 Clickatell SMS API No phone app RecognisedPhone appDocumentedFree plan 6.1Free
- 14 Gupshup No phone app RecognisedPhone appDocumentedFree plan 6.1Free
- 15 Telnyx Text-to-Speech API No phone app RecognisedPhone appDocumentedFree plan 6.1$500/mo
- 16 Textbelt No phone app RecognisedPhone appDocumentedFree plan 6.0Free
- 17 2Factor.in OTP API No phone app RecognisedPhone appDocumentedFree plan 5.9₹4,999/mo
- 18 Commio SMS API No phone app RecognisedPhone appDocumentedFree plan 5.9 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 19 SMSPortal No phone app RecognisedPhone appDocumentedFree plan 5.9$0.08/mo
- 20 MoceanAPI No phone app RecognisedPhone appDocumentedFree plan 5.6
- 21 Plivo SMS API No phone app RecognisedPhone appDocumentedFree plan 5.6$0.01/mo
- 22 Twilio Programmable Messaging No phone app RecognisedPhone appDocumentedFree plan 5.5
- 23 Arkesel No phone app RecognisedPhone appDocumentedFree plan 5.4 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
- 24 smsmode RCS API No phone app RecognisedPhone appDocumentedFree plan 5.4€9/mo
- 25 Alert21 No phone app RecognisedPhone appDocumentedFree plan 5.3 Pay-as-you-go: YesSMS API: YesDelivery status: Yes
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 Samsung Mobile US Press?
ClickSend SMS API is ranked #1 of 74 with a score of 7.7. Mailchimp is second and BulkGate 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 mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.