Amazon SNS vs Telnyx
Compare Amazon SNS and Telnyx based on observed SMS API performance, features, and pricing
Live performance comparison
Real-world performance data from messages sent through Knock
| Provider | Message volume | Growth | Status page updates (30d) | Status page updates (90d) |
|---|---|---|---|---|
 | 25M–100M | 2nd of 7 → | 0 | 0 |
 | <1M | 3rd of 7 ↓ | 25 | 25 |
From January 2nd to April 2nd, Knock routed 25M–100M messages through Amazon SNS and <1M through Telnyx. Amazon SNS reported 0 status page updates over the last 90 days, while Telnyx reported 25.
Response time
Response time measures how long each provider takes to accept an SMS API request from Knock, including connection overhead and any automatic retries. Lower values mean faster message hand-off.
| Provider | Median (p50) | p90 | p95 | p99 |
|---|---|---|---|---|
| 77ms | 378ms | 778ms | 794ms |
| 275ms | 451ms | 508ms | 662ms |
The chart above shows each provider's daily median response time (p50) from January 2nd to April 2nd. The top-line number is an average of these daily values: Amazon SNS averaged 77ms compared to 275ms for Telnyx. Amazon SNS's highest daily p50 was 81ms; Telnyx's was 313ms. Amazon SNS is 198ms faster at the median, which can add up at high volumes.
The 90th percentile (p90) captures the slowest 10% of requests, revealing how each provider handles moderate stress. Averaged across all days, Amazon SNS has a p90 of 378ms compared to 451ms for Telnyx. The highest daily p90 was 772ms for Amazon SNS and 19505ms for Telnyx. Amazon SNS handles these slower requests 73ms faster, suggesting more consistent performance across the board.
The 99th percentile (p99) represents the long tail — the slowest 1% of requests. Averaged across all days, Amazon SNS reached 794ms at p99 while Telnyx reached 662ms. The highest daily p99 was 865ms for Amazon SNS and 19738ms for Telnyx, indicating the worst-case response time during spikes or provider-side congestion. Telnyx shows a tighter tail, which may matter for time-sensitive SMS notifications like one-time passwords or real-time alerts where even rare delays can impact user experience.
Error rate
Error rate tracks the ratio of 5xx responses and timeouts to total SMS API requests. Knock automatically retries failed requests, so transient provider errors rarely affect end-user delivery.
| Provider | Avg. daily error rate | Highest daily rate | Peak error date | Zero-error days | Days above 0.01% |
|---|---|---|---|---|---|
| 0.00% | 0.00% | Jan 2 | 91 | 0 |
| 0.42% | 24.57% | Feb 20 | 57 | 34 |
Averaged across the date range, Amazon SNS shows a 0.00% daily error rate compared to 0.42% for Telnyx. The highest single-day error rate was 0.00% for Amazon SNS and 24.57% for Telnyx. Amazon SNS demonstrates a lower error rate, indicating slightly more consistent availability during this period. Knock automatically retries failed requests to both providers, minimizing the impact of transient errors on end-user delivery.
About these metrics: Data represents messages sent through Knock during the specified period. Response time measures time from Knock to provider acceptance. Error rate includes only provider 5xx responses and timeouts.
Recent Amazon SNS incidents
Recent status page incidents for Amazon SNS
No incidents reported in the last 90 days
Recent Telnyx incidents
Recent status page incidents for Telnyx
Started Apr 3, 2026 — Resolved Apr 3, 2026
Apr 3, 10:39 UTC Resolved - This incident has been resolved.Apr 3, 09:45 UTC Monitoring - A fix has been implemented and we are monitoring the results.Apr 3, 09:03 UTC Investigating - We are aware of instability affecting our Wireless Products API endpoints. The incident began at approximately 08:25 UTC. Our engineering team is actively investigating the root cause. Further updates will be provided as information becomes available.
Started Apr 2, 2026 — Resolved Apr 2, 2026
Apr 2, 17:00 UTC Completed - The scheduled maintenance has been completed.Apr 2, 12:00 UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Apr 2, 11:12 UTC Scheduled - Engineering will run updates on voice services on all regions.
Ongoing since Apr 2, 2026
Apr 2, 13:00 UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Apr 2, 11:13 UTC Scheduled - Our Telephony Engineers will be performing an update on our Voice Services across all regions Impact: This update is not expected to disrupt service. Action Required: If you experience any audio issues or dropped calls during this maintenance window, please report them immediately to Telnyx Support.
Started Apr 2, 2026 — Resolved Apr 2, 2026
Apr 2, 05:30 UTC Completed - The scheduled maintenance has been completed.Apr 2, 04:30 UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Apr 1, 12:53 UTC Update - We will be undergoing scheduled maintenance during this time.Mar 25, 09:44 UTC Update - We will be undergoing scheduled maintenance during this time.Mar 31, 05:30 UTC Scheduled - The Telnyx Wireless teams will perform upgrades to mobile data infrastructure in the North America reg
Started Apr 1, 2026 — Resolved Apr 1, 2026
Apr 1, 14:00 UTC Completed - The scheduled maintenance has been completed.Mar 31, 18:30 UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar 31, 17:06 UTC Scheduled - Our Telephony Engineers will be performing an update on our Voice Services servers servers across all regions Impact: This update is not expected to disrupt service. Action Required: If you experience any audio issues or dropped calls during this maintenance window, please repo
Pricing comparison
| Provider | Plan | Per message | Monthly cost |
|---|---|---|---|
| Amazon SNS | Pay-as-you-go | $0.007 | $700 |
| Telnyx | Pay-as-you-go | $0.004 | $400 |
Amazon SNS
US outbound SMS costs $0.007 per message. Origination numbers are billed separately. Amazon SNS charges a flat $0.00302 carrier fee per message, regardless of destination carrier.
Telnyx
No free tier. Outbound SMS to US numbers costs $0.004 per message. Inbound messages are $0.004 each. Phone numbers start at $1.00/month for local numbers. Carrier surcharges are passed through at cost with no markup.
US carrier surcharges
All US A2P SMS sent via 10DLC incurs mandatory carrier fees on top of the provider base rate. Most providers pass these through at cost.
| Carrier | Outbound SMS | Inbound SMS |
|---|---|---|
| T-Mobile | $0.0045 | $0.0025 |
| AT&T | $0.003 | $0.003 |
| Verizon | $0.004 | $0.00 |
| US Cellular | $0.005 | $0.00 |
Amazon SNS flat carrier fee. Amazon SNS charges a flat $0.00302 carrier fee per message, regardless of destination carrier. This makes costs more predictable compared to providers that pass through variable per-carrier fees.
Pros and cons
Amazon SNS
Telnyx
Pros
- Among the lowest per-message costs for US domestic SMS
- Deep integration with the AWS ecosystem and IAM permissions
- Reliable infrastructure backed by Amazon's global network
- Supports 200+ countries and regions
Pros
- Among the lowest per-message rates for US domestic SMS
- Private IP network provides lower latency than providers using the public internet
- Transparent, pay-as-you-go pricing with no monthly minimums
- Strong developer experience with well-documented APIs and SDKs
Cons
- New accounts are sandboxed and require a support request to go to production
- SMS features are a subset of the broader SNS pub/sub service, which can be confusing
- Limited built-in analytics compared to dedicated SMS platforms
Cons
- Smaller community and ecosystem compared to Twilio
- No free trial credits for new accounts
- Feature set is narrower than full-suite platforms like Twilio
Frequently asked questions
What is the difference between Amazon SNS and Telnyx?
Amazon SNS is a cost-effective SMS service built on AWS infrastructure, ideal for applications already in the AWS ecosystem. Telnyx is a developer-first communications platform with competitive pricing and a private IP network for reliable SMS delivery. Amazon SNS is best suited for aws-native applications, while Telnyx is geared toward cost-effective developer sms.
Which is cheaper, Amazon SNS or Telnyx?
US outbound SMS costs $0.007 per message. Origination numbers are billed separately. Amazon SNS charges a flat $0.00302 carrier fee per message, regardless of destination carrier. No free tier. Outbound SMS to US numbers costs $0.004 per message. Inbound messages are $0.004 each. Phone numbers start at $1.00/month for local numbers. Carrier surcharges are passed through at cost with no markup. The best value depends on your sending volume and destination countries.
Which is faster, Amazon SNS or Telnyx?
Based on real-world data from Knock, Amazon SNS has a median SMS API response time (p50) of 77ms compared to 275ms for Telnyx.
Which is more reliable, Amazon SNS or Telnyx?
From January 2nd to April 2nd, Amazon SNS showed an error rate of 0.00% while Telnyx showed 0.42%. Both rates are within acceptable thresholds for production SMS delivery, and Knock automatically retries failed requests to minimize the impact of transient errors.
Which is more popular, Amazon SNS or Telnyx?
On the Knock platform, Amazon SNS handled 25M–100M messages from January 2nd to April 2nd compared to <1M for Telnyx. Amazon SNS volume has remained stable, while Telnyx is seeing declining volume.
Can I use both Amazon SNS and Telnyx together?
Yes. Knock enables you to integrate multiple SMS providers into a single notification workflow. You can use Amazon SNS and Telnyx side by side, route traffic between them, or migrate from one to the other without changing your application code.
What are the main pros and cons of Amazon SNS vs Telnyx?
Amazon SNS strengths include among the lowest per-message costs for us domestic sms and deep integration with the aws ecosystem and iam permissions. Telnyx strengths include among the lowest per-message rates for us domestic sms and private ip network provides lower latency than providers using the public internet. On the other hand, Amazon SNS drawbacks include new accounts are sandboxed and require a support request to go to production, while Telnyx drawbacks include smaller community and ecosystem compared to twilio.
Use either provider with Knock
Knock enables you to integrate Amazon SNS, Telnyx, or any combination of SMS providers into a single notification workflow. Manage templates, orchestrate cross-channel delivery, and switch providers without changing your code.