SMS and messaging APIs · Comparison
AWS End User Messaging SMS vs Sinch SMS API vs Telnyx Messaging API vs Twilio Programmable Messaging
4 products compared side by side: what you pay for with each one first, then the five access facts, entry prices, recorded plan limits and the bottom line of each review. The evidence note under the table says how each product was checked.
Side by side
| Metric | AWS End User Messaging SMS | Sinch SMS API | Telnyx Messaging API | Twilio Programmable Messaging |
|---|---|---|---|---|
| What you're paying for | Compliance includedUS texting from your own AWS account, inside AWS’s SOC 2, ISO 27001 and HIPAA scope, with opt-outs, events and 10DLC registration as AWS APIs. | Built-in reachPrepaid SMS priced for 241 countries from one account, with US 10DLC registration in the same dashboard or API and a SOC 2 Type II that names the SMS API. | Worth the priceUS texting at $0.004 a part, the lowest published rate in this group, with carrier and 10DLC fees passed through at cost and every messaging rate public. | Compliance includedUS texting with every fee and the compliance paperwork on public pages, plus opt-outs and 10DLC registration handled through the API. |
| Overall score | 6.9 | 7.6 | 8.2Best | 7.2 |
| Free option | Paid only | Free trial | Free trial | 30-day free trial |
| Card to start | –Not measured | No card needed | No card needed | No card needed |
| Getting access | Approval wait | Self-serve | Self-serve | Self-serve |
| Starter priceCheapest paid plan | $0.00774/US SMS + carrier fee | $0.0078/message | $0.004/SMS part | $0.0083/SMS segment |
| Pricing model | Usage-based | Usage-based | Usage-based | Usage-based |
| Pricing page | Public prices | Public prices | Public prices | Public prices |
| US SMS rate (10DLC) | $0.00774 per message part, outbound; inbound $0.0075 | $0.0078 per message, outbound or inbound | $0.004 per part, outbound or inbound | $0.0083 per segment, outbound or inbound |
| US carrier fees | One all-network fee: $0.00421 (10DLC, long code, toll-free) | Per carrier: AT&T $0.0035, T-Mobile $0.0045, Verizon $0.0050 (outbound; carrier fee article of Oct 1, 2026) | Per carrier, no markup: AT&T $0.0035, T-Mobile $0.0045, Verizon $0.0045 (outbound) | Per carrier: AT&T $0.0035, T-Mobile $0.0045, Verizon $0.005 (outbound) |
| Local number | $1/mo (10DLC) | $1.00/mo plus $1.00 setup | $1.00/mo plus $0.10/mo for SMS and MMS | $1.15/mo |
| 10DLC registration fees | Brand $4.50, optional brand vetting $41.50, campaign $2/mo low-volume or $10/mo; no campaign vetting fee listed | Brand $4, campaign review $15 per submission, $10/mo standard or $1.50/mo low-volume mixed (under 10k SMS/mo); optional vetting $41.50 | Passed through: brand $4.50, campaign review $15, $1.50/mo low-volume mixed | Passed through: brand $4.50, campaign vetting $15, $1.50/mo low-volume mixed |
| Reference scenario (10,000 US texts/mo) | $122.88, computed | $134.00, computed | $85.89, computed | $130.61, computed |
| Free option | None for SMS; sandbox sends billed texts to up to 10 verified numbers | Trial credit, no card ($2 for US accounts per archived help); texting sandbox | $5 testing credit after a fraud review, no card; texts only to your own verified number | 30-day trial: 100 SMS to up to 5 verified numbers, no card |
| Volume discounts | None listed for SMS | Not published; contact sales | Published tiers, from 100M parts/mo on local numbers | Mentioned but not published; committed use by sales |
| SOC 2 / ISO 27001 | Listed in AWS SOC 1/2/3 and ISO 27001 scope | SOC 2 Type II naming the SMS API; group ISO 27001 certificate | SOC 2 Type 1 and Type 2; ISO 27001:2013 (scope not stated) | SOC 2 Type 2 (all services) and ISO 27001 |
| HIPAA BAA | HIPAA eligible under the AWS BAA (voice and WhatsApp excluded) | Product-level BAAs offered; SMS API not named | Yes, US messaging traffic only; rate sheet lists $2,500/mo | Yes, SMS eligible; needs Security or Enterprise Edition |
| Non-US data region | The AWS Region you pick, EU Regions included | EU (Ireland, Sweden), Australia, Brazil, Canada through the account manager | EU (Germany), Australia, UAE or Canada, chosen once | Ireland (IE1) for SMS; no +1 numbers there |
| Opt-out handling | Automatic STOP/HELP by default; self-managed optional | Automatic STOP blocking once consent management is switched on (Conversation API) | Automatic STOP and similar keywords; AI detection $0.002 per message | Automatic STOP/HELP on long code and toll-free |
| SSO | SAML 2.0 through IAM Identity Center, no extra charge | SAML in Sinch Build; no plan condition stated | SAML through Organizations; no plan gate stated | SAML 2.0 in Twilio Editions, by sales |
| Bottom line | From its public pages, AWS End User Messaging SMS pairs a published US price with AWS’s compliance scope, and SSO and an audit log at no extra charge. There is no trial, production needs approval per Region, and technical support is a paid plan. | From its public pages, Sinch offers a prepaid SMS API with per-country prices, SAML SSO, non-US servers and a SOC 2 Type II for SMS. Its US carrier and 10DLC fees sit in help articles that call them "only indications". | From its public pages, Telnyx has the lowest published US rate and scenario figure in this group, with every fee itemized and passed through at cost. US 10DLC needs the Verified tier with KYC, the trial is narrow, and several pages disagree on fees and plans. | From its public pages, Twilio publishes every US fee and a full set of compliance documents for SMS, with opt-outs and 10DLC registration handled by the platform. Our scenario costs more than at Telnyx or AWS, volume tiers are not published, and a few pages disagree on fees. |
Evidence: AWS End User Messaging SMS: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run; Sinch SMS API: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run; Telnyx Messaging API: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run; Twilio Programmable Messaging: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run. Prices in USD as listed, excluding tax. "–" means not recorded.
When to pick each
In the words of each review, with the date its facts were checked.
From our AWS End User Messaging SMS review
Checked Oct 15, 2026- Pick AWS End User Messaging SMS when
- You run on AWS and want SSO through IAM Identity Center at no extra charge, with a lower scenario figure ($122.88 against $130.61 a month, computed).
- Pick Twilio Programmable Messaging when
- You want a free trial, web support for every account and carrier fees listed per carrier.
From our AWS End User Messaging SMS review
Checked Oct 15, 2026- Pick AWS End User Messaging SMS when
- You want the DPA built into the terms and SMS inside the compliance scope of the AWS account you already use.
- Pick Telnyx Messaging API when
- Price leads: $0.004 per part puts our scenario at $85.89 a month, with a $5 trial credit and support for every account.
From our AWS End User Messaging SMS review
Checked Oct 15, 2026- Pick AWS End User Messaging SMS when
- You need a HIPAA path for SMS, want the US carrier and 10DLC fees on the pricing page and price list, and a lower scenario figure ($122.88 against $134.00).
- Pick Sinch SMS API when
- You want trial credit without a card and a sandbox for test messages that does not bill.
From our Sinch SMS API review
Checked Oct 15, 2026- Pick Sinch SMS API when
- You want a texting sandbox for tests and a DPA that is part of the online terms.
- Pick Telnyx Messaging API when
- Price leads: our scenario is $85.89 a month at Telnyx against $134.00 here, with carrier fees and volume tiers on its own pricing page.
From our Sinch SMS API review
Checked Oct 15, 2026- Pick Sinch SMS API when
- You want SAML SSO with no plan condition stated, a texting sandbox, and prices for 241 countries in one prepaid account.
- Pick Twilio Programmable Messaging when
- You need a HIPAA BAA that names SMS, an audit log, carrier fees on the pricing page itself and a slightly lower scenario figure ($130.61 against $134.00).
From our Sinch SMS API review
Checked Oct 15, 2026- Pick Sinch SMS API when
- You want a trial credit without a card, a sandbox that does not bill, and carrier fees listed per carrier.
- Pick AWS End User Messaging SMS when
- You already run on AWS and need a HIPAA BAA for SMS, CloudTrail audit logs and SSO through IAM Identity Center.
From our Telnyx Messaging API review
Checked Oct 15, 2026- Pick Telnyx Messaging API when
- Price leads: our scenario is $85.89 a month against $130.61, with published volume tiers and SSO without a sales step.
- Pick Twilio Programmable Messaging when
- You want a DPA built into the terms and SOC 2 Type 2 stated for all services, and can pay more per text.
From our Telnyx Messaging API review
Checked Oct 15, 2026- Pick Telnyx Messaging API when
- You want carrier fees on the pricing page itself, published volume tiers and a lower scenario figure ($85.89 against $134.00).
- Pick Sinch SMS API when
- You want a sandbox for simulated test messages that do not bill, and a DPA that is part of the online terms.
From our Telnyx Messaging API review
Checked Oct 15, 2026- Pick Telnyx Messaging API when
- You want trial credit, carrier fees per carrier, support without a paid plan and a lower scenario figure ($85.89 against $122.88).
- Pick AWS End User Messaging SMS when
- You already run on AWS and want the BAA, DPA and CloudTrail under your AWS account, with SMS on your AWS invoice.
From our Twilio Programmable Messaging review
Checked Oct 15, 2026- Pick Twilio Programmable Messaging when
- You want a DPA built into the terms, and SOC 2 Type 2 and ISO 27001 with their scope stated on the security overview.
- Pick Telnyx Messaging API when
- Price leads: $0.004 per part puts our scenario at $85.89 a month, with a $5 trial credit and published volume tiers.
From our Twilio Programmable Messaging review
Checked Oct 15, 2026- Pick Twilio Programmable Messaging when
- You want a free trial, free web support for every account and carrier fees listed per carrier.
- Pick AWS End User Messaging SMS when
- You already run on AWS and want SSO through IAM Identity Center at no extra charge and SMS billed on your AWS invoice.
Entry price
Baseline: each product's cheapest paid plan, per month. Included usage differs, so read the line under each price.
- AWS End User Messaging SMS10DLC phone number$1/moPer number; charged while the registration is pending
- Brand registration $4.50 one-time; brand vetting $41.50 optional
- Campaign $2/mo low-volume or $10/mo regular
- $12.50 extra for public for-profit brands
- $50 T-Mobile campaign activation fee postponed until further notice
- Sinch SMS APILocal number (10DLC)$1.00/moPlus $1.00 one-time setup
- 10DLC fees (fee article, updated Sep 17, 2026): brand $4, campaign review $15 per submission, low-volume mixed campaign $1.50/mo (under 10k SMS a month), most other campaigns $10/mo
- Campaign fees billed 3 months up front
- Telnyx Messaging APILocal number (10DLC)$1.10/mo$1/mo per local number plus $0.10/mo to add SMS and MMS; no setup fee listed
- 10DLC fees passed through at cost: brand $4.50, campaign review $15
- Low-volume mixed campaign $1.50/mo; standard campaign $10/mo
- Twilio Programmable MessagingLocal number (10DLC)$1.15/moPer leased long code; bring your own number $0.5/mo
- 10DLC fees passed through at cost: brand $4.50, campaign vetting $15
- Low-volume mixed campaign $1.50/mo; standard campaign $10/mo
Prices as listed on each pricing page, in USD per month, excluding tax. Observed: AWS End User Messaging SMS 2026-10-15, Sinch SMS API 2026-10-15, Telnyx Messaging API 2026-10-15, Twilio Programmable Messaging 2026-10-15.
Which one fits
- If you need to start today without a sales call
- Telnyx Messaging APISelf-serve sign-up, no card needed; the highest score of the 3 self-serve products here (8.2/10).
- If you want to try it without entering a card
- Telnyx Messaging APIFree trial, no card needed, and the highest score of the 3 that skip the card (8.2/10).
- Lowest starter price
- AWS End User Messaging SMS and Sinch SMS API$0.00774/US SMS + carrier fee for the Pay as you go plan each.
- Highest overall score
- Telnyx Messaging API8.2/10 (Excellent). The review shows the score breakdown and the run behind it.
Picked by fixed rules from the table above, not by hand. How we score