Last Updated: May 2026
Push notifications cost almost nothing per send. SMS in the United States costs roughly $0.0079 per message on Twilio, plus 10DLC carrier fees. That's a 100-1,000x cost gap between channels that target the same lock screen. Choosing between them is rarely about cost alone, though.
This guide compares push notifications and SMS across the five things that actually decide which channel to use: cost, deliverability, engagement, compliance, and use-case fit. Most product teams end up using both, routed by message priority. By the end of this guide you'll know exactly when each wins and when to use them together.
Quick Verdict: Push vs SMS
Cost references based on Twilio's published US SMS pricing as of May 2026; engagement bands from common industry benchmarks. Verify against your own data before relying on these for capacity planning.
What is a Push Notification?
A push notification is a message delivered to a user's device through a mobile or web operating system. On mobile, delivery goes through Firebase Cloud Messaging (FCM) for Android and Apple Push Notification service (APNs) for iOS. On web, browsers route through their own push services (Mozilla, Apple, Google).
The mechanics: your backend sends a payload to FCM or APNs, the OS wakes the device, the OS displays the notification (lock screen banner, in-app alert, or notification tray). The user has to install the app and grant push permission for any of this to work.
What is SMS?
SMS (Short Message Service) is a text message delivered through cellular carrier networks. In the US, business SMS goes through 10DLC (10-digit long codes) registered with The Campaign Registry (TCR), short codes, or toll-free numbers. Delivery is carrier-mediated and regulated.
The mechanics: your backend calls an SMS API (Twilio, MessageBird, Plivo, AWS SNS), the API hands the message to a carrier aggregator, the aggregator routes through AT&T, T-Mobile, Verizon, or another carrier, and the carrier delivers to the device. No app required.
Cost: Push vs SMS
This is the dimension where push wins by an order of magnitude.
Push notification costs
- FCM and APNs: Free from Google and Apple.
- Notification platform fees: $0.001 to $0.005 per push depending on volume tier.
- Engineering cost: One-time SDK integration, then near-zero marginal cost.
SMS costs (US 10DLC)
- Twilio per-message fee: ~$0.0079 outbound SMS.
- Carrier fees: $0.002 to $0.005 per message depending on carrier (AT&T, T-Mobile, Verizon).
- 10DLC registration: Brand registration fee ($4) plus per-campaign fees ($1.50-$10/month).
- MMS: Roughly 3-4x SMS cost.
For a million messages per month, push costs hundreds of dollars; SMS costs ten thousand dollars or more. That's the structural reason push wins for any high-volume, low-criticality message.
Deliverability: Push vs SMS
SMS wins on raw delivery rates because it doesn't require an app install. As long as the phone number is valid, the carrier is reachable, and the 10DLC campaign is registered, delivery is 90-99% in the US.
Push delivery is conditional. The user must have the app installed, must have granted push permission, and must have a working internet connection. Push opt-in rates on iOS hover around 50-60% by default and can climb with priming UX. Android historically has higher opt-in (closer to 80%) but Android 13+ changed that.
Once a push is sent, FCM and APNs deliver within seconds for online devices. For offline devices, FCM holds messages up to 28 days; APNs holds the most recent message per app.
Engagement: Push vs SMS
SMS wins on read rate by a wide margin. SMS open rates land in the 90%+ range within three minutes of delivery, per common carrier and platform benchmarks. Push notification interaction rates on the lock screen typically range from 3-10%, depending on category, time of day, copy, and how often the app sends.
The reason isn't channel quality. It's user expectation. SMS still carries an "important" connotation because consumers receive few of them. Push notifications are background noise for most users, especially on iOS, where the lock screen is crowded.
For more on the mechanics of why push opt-out happens, see how to reduce push opt-out rates.
Compliance: Push vs SMS
SMS in the US is heavily regulated. The relevant regimes:
- TCPA (Telephone Consumer Protection Act): Express written consent required for marketing SMS; per-violation penalties of $500-$1,500.
- 10DLC + The Campaign Registry: Brand and campaign registration required for application-to-person SMS through US carriers. Unregistered traffic is filtered or blocked.
- STOP/HELP keywords: Must be honored automatically.
- CTIA Best Practices: Industry-level guidelines on opt-in, content categories, and frequency.
Push notifications are regulated through OS and app-store policy rather than carrier law. Apple and Google require a clear opt-in flow (the system prompt) and prohibit deceptive or spammy use. Failure shows up as app-store enforcement actions, not TCPA lawsuits.
For multi-region rollouts, GDPR and CCPA add consent and preference requirements on top of channel-level rules.
Use Cases: When Each Channel Wins
Push notifications win for
- Content alerts (breaking news, new episodes, social mentions)
- Re-engagement (a user hasn't opened the app in 7 days)
- In-app product updates (new feature, status changes, comments)
- Time-sensitive but not critical (price drop, restock, daily digest)
- High-volume, low-marginal-cost messaging
SMS wins for
- OTPs and 2FA codes
- Account security alerts (login from new device, password change)
- Mission-critical transactional (delivery confirmations, appointment reminders, fraud alerts)
- Reaching users who don't have your app
- One-shot, high-importance messages where 90%+ read is required
Use both for
- Critical alerts where push fallback to SMS makes sense if push doesn't deliver in N minutes
- Confirmation flows: push for the in-app context, SMS for the receipt
- Multi-step workflows where channel routes by user preference
The Real Answer: Use Both, Routed by Priority
Most production-ready notification setups don't pick one channel; they route by message type, priority, and user preference. The pattern that works:
- Define message categories. Transactional (OTP, password reset), product (mention, comment), promotional (sale, content). Each gets a default channel set.
- Define user preferences. Let users opt in or out per category and per channel. Preferences override defaults.
- Define fallback rules. If push doesn't deliver in 5 minutes, send SMS. If SMS fails, send email. Vendor-level fallback handles delivery failures.
- Centralize the routing logic. Don't put this in your application code. Use a notification platform's workflow engine.
For more on architecting this routing layer, see the multi-channel notifications guide and how to choose the right channel for every message.
How SuprSend Handles Push and SMS Together
SuprSend treats push and SMS as first-class channels inside a single workflow engine. A signup flow can fire push first, fall back to SMS after a configurable delay if the push doesn't deliver, and fall back again to email after another delay. The routing logic lives in a visual workflow, not in application code.
Vendor neutrality: bring your own FCM and APNs credentials for push, your own Twilio, MessageBird, Plivo, or Gupshup for SMS. Vendor fallback handles per-vendor delivery failures automatically.
Per-step logs surface every workflow node, every vendor call, and every delivery event so engineers can debug failures across both channels in the same pane.
Frequently Asked Questions
Is push notification cheaper than SMS?
Yes, by a wide margin. Push notifications cost effectively zero per send (FCM and APNs are free; notification platform fees are $0.001-$0.005). SMS in the US costs roughly $0.0079 per message on Twilio plus carrier fees and 10DLC registration costs. For a million messages, that's the difference between hundreds of dollars and over ten thousand.
Which has higher open rates: push or SMS?
SMS, by a large margin. SMS read rates are typically 90%+ within three minutes of delivery. Push notification interaction rates on the lock screen typically range from 3-10%. The gap is driven by user expectation: consumers still treat SMS as important and push as background noise.
Can I use both push and SMS together?
Yes, and most production setups do. The common pattern is to route by message type and priority: push for high-volume product and content updates, SMS for OTPs and mission-critical transactional, with fallback rules that escalate from push to SMS if delivery doesn't confirm in N minutes.
Is SMS regulated more strictly than push?
Yes. SMS in the US is governed by TCPA, 10DLC registration through The Campaign Registry, and CTIA best practices. Per-violation TCPA penalties range from $500-$1,500. Push notifications are regulated through OS and app store policy rather than carrier law, with enforcement at the app-store level.
Do I need an app for push notifications?
Yes, for mobile push. The user must install your app and grant push permission. Web push works without an app install but requires browser-level opt-in. SMS requires no app, only a phone number and consent.
What happens if a push notification doesn't deliver?
FCM holds messages up to 28 days for offline devices. APNs holds only the most recent message per app. If delivery doesn't happen within your acceptable window, fallback to SMS or email through a workflow engine is the standard pattern.
Should OTPs go through SMS or push?
SMS, almost always. OTPs are mission-critical, time-sensitive, and need near-100% delivery. SMS hits 90%+ read in three minutes. Push is conditional on app install, opt-in, and connectivity, none of which are guaranteed at signup or login moments. If your audience is heavily app-installed, push can serve as a primary channel with SMS as fallback.
TL;DR
Push notifications cost effectively zero per send and are best for re-engagement, content alerts, and high-volume product updates. SMS costs ~$0.0079 per message in the US plus 10DLC fees but delivers 90%+ read rates within three minutes, making it the right choice for OTPs, security alerts, and mission-critical transactional messages. Most production teams use both, routed by message type and priority, with push-to-SMS fallback for critical messages. The right architecture centralizes routing in a notification platform rather than scattering it across application code.
Next Steps
If you want to centralize push and SMS routing in one platform, the SuprSend free tier includes 10,000 notifications per month across every channel including push and SMS. Or book a 30-minute call to walk through your current channel setup.
