Startup & small team · Prompt 4 of 8 · September 2026

A real buyer question from the September 2026 snapshot, asked 3× to each of the three models. 9 answers recorded.

“Which SMS API is best for a startup watching costs?”

ChatGPT answered 3× this snapshot

For a startup optimizing for cost, the “best” SMS API is usually the one with: low per-message rates in your target countries, no/low monthly minimums, reliable delivery, simple docs, and transparent compliance fees. Short answer: Twilio is often the safest default, but not the cheapest. If cost is the top priority, Plivo, Telnyx, or MessageBird/Sinch alternatives are often worth comparing. The real winner depends…

Named across its answers: 1. Twilio2. Plivo3. Vonage4. Telnyx5. Bird

Verbatim excerpt from one collected ChatGPT answer; formatting flattened, words untouched.

Telnyx owns this question with a perfect 9-of-9 mention rate, but Plivo actually sits closer to the top of each list at an average position of 2.4 versus Telnyx's 2.9, meaning Plivo reads as the instinctive first-tier pick even without a single first-place finish. For marketers, the gap between omnipresence and pole position is where conversion is won or lost.

AI-generated read of the September 2026 measurements.

Who wins this question

Contested Consensus

All three models name Twilio, Plivo, Vonage, Telnyx and Bird on this question.

ChatGPT

Claude

Gemini mentioned · first · avg. pos

Plivo 222333223 9/9 · never first · #2.4

Telnyx 433444112 9/9 · 2× first · #2.9

Twilio 1111115 7/9 · 6× first · #1.6

Vonage 3652224 7/9 · never first · #3.4

Bird 55455 5/9 · never first · #4.8

Sinch 64675 5/9 · never first · #5.6

AWS SNS 6734 4/9 · never first · #5

SignalWire 41 2/9 · 1× first · #2.5

TextBelt 65 2/9 · never first · #5.5

AWS Pinpoint 3 1/9 · never first · #3

Infobip 7 1/9 · never first · #7

Each square is one collected answer; the number is the brand's position in that answer. Lime = the very first recommendation. Unlinked brands were named by the models here but sit outside this category's published top 15 overall. Never mentioned here: Bandwidth, AWS, Azure Communication Services, SendGrid, ClickSend, Postmark.