Telnyx vs WhatsApp
Compare Telnyx and WhatsApp 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) |
|---|---|---|---|---|
 | <1M | 3rd of 7 ↓ | 25 | 25 |
 | <1M | 4th of 7 ↑ | 4 | 12 |
From January 2nd to April 2nd, Knock routed <1M messages through Telnyx and <1M through WhatsApp. Telnyx reported 25 status page updates over the last 90 days, while WhatsApp reported 12.
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.
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: Telnyx averaged 275ms compared to 720ms for WhatsApp. Telnyx's highest daily p50 was 313ms; WhatsApp's was 1052ms This peak coincided with a critical incident reported on WhatsApp's status page (Resolved: Embedded Signup).. Telnyx is 445ms 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, Telnyx has a p90 of 451ms compared to 1082ms for WhatsApp. The highest daily p90 was 19505ms for Telnyx and 1633ms for WhatsApp This peak coincided with a critical incident reported on WhatsApp's status page (Resolved: Embedded Signup).. Telnyx handles these slower requests 631ms 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, Telnyx reached 662ms at p99 while WhatsApp reached 1708ms. The highest daily p99 was 19738ms for Telnyx and 5683ms for WhatsApp This peak coincided with a critical incident reported on WhatsApp's status page (Resolved: Embedded Signup)., 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% |
|---|---|---|---|---|---|
| 0.42% | 24.57% | Feb 20 | 57 | 34 |
| 0.00% | 0.00% | Jan 2 | 91 | 0 |
Averaged across the date range, Telnyx shows a 0.42% daily error rate compared to 0.00% for WhatsApp. The highest single-day error rate was 24.57% for Telnyx and 0.00% for WhatsApp. WhatsApp 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 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
Recent WhatsApp incidents
Recent status page incidents for WhatsApp
Started Mar 26, 2026 — Resolved Mar 26, 2026
We are currently experiencing low disruptions impacting sending messages on Whatsapp Cloud API. Our engineering teams have identified the potential issue and deploying a fix (ETA 6PM PST). We will provide another update within 4 hour or sooner if additional information is available.
Started Mar 18, 2026 — Resolved Mar 18, 2026
We are currently experiencing low disruptions impacting message sending on Cloud API. This issue started around 10:00 AM +08 GMT. Our engineering teams are investigating the issue. We will provide another update within the next 1 hour or sooner if additional information is available.
Started Mar 10, 2026 — Resolved Mar 10, 2026
We are currently experiencing High Disruptions impacting QR Code scanning for Coexistence Onboarding via Embedded Signup Flow. This issue started at Mar 10 2026 19:14:00 UTC. The fix for the High Disruptions has been deployed and this issue is now mitigated as of Mar 10 2026 21:30:00. Thank you for your patience.
Started Mar 9, 2026 — Resolved Mar 10, 2026
We are currently experiencing Medium Disruptions impacting template messages that include a URL button and a media header. Users on iOS 2.26.8.76 may see a broken experience. This issue started at Mar 06 2026 20:00:00 UTC. We are currently deploying the fix and the expected deployment time is in Mar 13 2026 19:00:00 UTC. We will provide another update within 12 hours or sooner if additional information is available.
Started Mar 3, 2026 — Resolved Mar 4, 2026
We are currently experiencing high disruptions impacting Cloud API - Business Initiated Calling. Our engineering teams are investigating the issue. We will provide another update if additional information is available.
Pricing comparison
| Provider | Plan | Per message | Monthly cost |
|---|---|---|---|
| Telnyx | Pay-as-you-go | $0.004 | $400 |
| Utility + authentication | $0.0034 | $340 |
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.
WhatsApp charges per message for utility and authentication conversations, with graduated volume discounts. Marketing and service conversations have separate rate cards. US rates shown; international rates vary by country.
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 |
Pros and cons
Telnyx
WhatsApp
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
Pros
- Reaches over 2 billion users on the platform they already use
- Rich messaging with media, buttons, and interactive elements
- Free 24-hour customer service window for inbound conversations
- High open rates compared to SMS and email
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
Cons
- Conversation-based pricing model is more complex than per-message SMS pricing
- Message templates require Meta approval before use, which can take up to 24 hours
- Limited to countries and regions where WhatsApp has significant adoption
Frequently asked questions
What is the difference between Telnyx and WhatsApp?
Telnyx is a developer-first communications platform with competitive pricing and a private IP network for reliable SMS delivery. WhatsApp is the world's most popular messaging platform, offering rich media messaging, interactive elements, and conversation-based pricing through Meta's Cloud API. Telnyx is best suited for cost-effective developer sms, while WhatsApp is geared toward rich customer messaging.
Which is cheaper, Telnyx or WhatsApp?
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. WhatsApp charges per message for utility and authentication conversations, with graduated volume discounts. Marketing and service conversations have separate rate cards. US rates shown; international rates vary by country. The best value depends on your sending volume and destination countries.
Which is faster, Telnyx or WhatsApp?
Based on real-world data from Knock, Telnyx has a median SMS API response time (p50) of 275ms compared to 720ms for WhatsApp.
Which is more reliable, Telnyx or WhatsApp?
From January 2nd to April 2nd, Telnyx showed an error rate of 0.42% while WhatsApp showed 0.00%. 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, Telnyx or WhatsApp?
On the Knock platform, Telnyx handled <1M messages from January 2nd to April 2nd compared to <1M for WhatsApp. Telnyx is currently seeing declining volume, while WhatsApp is trending upward.
Can I use both Telnyx and WhatsApp together?
Yes. Knock enables you to integrate multiple SMS providers into a single notification workflow. You can use Telnyx and WhatsApp 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 Telnyx vs WhatsApp?
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. WhatsApp strengths include reaches over 2 billion users on the platform they already use and rich messaging with media, buttons, and interactive elements. On the other hand, Telnyx drawbacks include smaller community and ecosystem compared to twilio, while WhatsApp drawbacks include conversation-based pricing model is more complex than per-message sms pricing.
Use either provider with Knock
Knock enables you to integrate Telnyx, WhatsApp, or any combination of SMS providers into a single notification workflow. Manage templates, orchestrate cross-channel delivery, and switch providers without changing your code.