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Head to head · Push notifications · October 2026 research run

Amazon SNS vs Expo Push Notifications

Amazon SNS scores 72.8 (BB) on agent readiness against Expo Push Notifications's 58.8 (C), and leads in 6 of 7 scored categories. Expo Push Notifications leads on payments & pricing. Both do push notifications.

Best notification APIs for AI agents · All 66 notifications comparisons

Amazon SNSAmazon Web Services · HTTP API BB72.8/100#99 of 950 Expo Push NotificationsExpo · HTTP API C58.8/100#571 of 950

Which one, for what

Amazon SNS BB

Good for Teams already on AWS that want cheap push, SMS and plain-text email alerts or fan-out to queues and functions under IAM and CloudTrail.

Ahead on

  • Reliability, 75 against 65
  • Schema & documentation, 83 against 60
  • Security & auth, 89 against 48
  • Transparency & trust, 83 against 68

Also in its favour

  • Agent-ready, a grade of BB or better

Watch for

No idempotency token on Publish to a standard topic. Only FIFO topics deduplicate, over a five-minute window

Expo Push Notifications C

Good for An agent that must push to an app already built with Expo, at no cost and with one call for both platforms.

Ahead on

  • Payments & pricing, 40 against 35

Watch for

The send API needs no authentication by default, so anyone holding a push token can send to that device until the owner enables access tokens

Score by category

CategoryWeight this runAmazon SNSExpo Push NotificationsEdge
Reliability16%207565Amazon SNS +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28360Amazon SNS +23
Agent ergonomics13%16.26563Amazon SNS +2
Security & auth14%17.58948Amazon SNS +41
Payments & pricing10%12.53540Expo Push Notifications +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87574Amazon SNS +1
Transparency & trust7%8.88368Amazon SNS +15
Negative events≤1500
Total72.8 · BB58.8 · C

Facts side by side

FactAmazon SNSExpo Push Notifications
KindHTTP APIHTTP API
VendorAmazon Web ServicesExpo
Hosted endpointhttps://sns.us-east-1.amazonaws.comhttps://exp.host/--/api/v2/push/send
TransportsHTTPHTTP
AuthOAuth or keyOAuth or key
PricingPay per useFree
Price for push notifications$0. per messagefree
x402nono
LicenceProprietary service under the AWS Customer Agreement. The AWS SDKs and the AWS Labs MCP server are Apache-2.0Proprietary service under Expo's terms of service. The Node.js server SDK is MIT
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-062026-08-24
Terms last updated2026-08-142025-05-29
Privacy policy last updated2026-05-182025-10-21
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waiveryesyes
Popularity6.5M npm/wk1k stars, 1.3M npm/wk

Verdicts

Amazon SNS

IAM and topic policies limit a credential to single actions and topics, a read-only managed policy exists, and CloudTrail can log each publish. Standard topics take no idempotency token, so a retried Publish can send twice. SNS has no user preferences, digests or in-app channel, email is plain text to confirmed subscribers, and SMS starts in a sandbox.

Expo Push Notifications

A free push relay with a small, well documented HTTP API, published limits of 600 notifications a second and written error codes. Sending needs no credential unless the owner turns on access tokens, there is no idempotency key or SLA, and the status page records three iOS push incidents since 4 August 2026.

Before you call either

Amazon SNS

  1. Sign requests with SigV4 for service sns at sns.<region>.amazonaws.com, or call aws sns publish --topic-arn <arn> --message <text> from the AWS CLI
  2. Track MessageId yourself on standard topics, because a retried Publish sends again. Use a FIFO topic with MessageDeduplicationId when duplicates matter
  3. Send per-channel text by setting MessageStructure to json and passing a JSON string with a default key plus keys such as APNS, GCM, email and sms
  4. Check GetSMSSandboxAccountStatus and the monthly spend quota before texting. Sandbox sends reach only verified numbers
  5. Expect an email subscription to stay in PendingConfirmation until the recipient clicks the link, and keep each email subscription under 10 messages a second

Expo Push Notifications

  1. Send an array of up to 100 messages per request, all for one project, and stay under 600 notifications a second
  2. Keep each ticket id and POST them to /--/api/v2/push/getReceipts about 15 minutes later. Receipts are cleared after 24 hours
  3. Stop sending to a token when a ticket or receipt returns DeviceNotRegistered
  4. If the project has enhanced push security on, send Authorization: Bearer <access token> or the call fails with UNAUTHORIZED
  5. Retry 429 and 5xx with exponential backoff, and expect an occasional duplicate because there is no idempotency key

Questions

Which is better for AI agents, Amazon SNS or Expo Push Notifications?

Amazon SNS scores 72.8 (BB) on agent readiness against Expo Push Notifications's 58.8 (C), and leads in 6 of 7 scored categories. Expo Push Notifications leads on payments & pricing.

Which is cheaper for push notifications, Amazon SNS or Expo Push Notifications?

Expo Push Notifications, at free against $0. per message for Amazon SNS. These are the vendors' published prices for the job.

Do Amazon SNS and Expo Push Notifications need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Amazon SNS and Expo Push Notifications without installing anything?

Yes. Amazon SNS has a hosted endpoint at https://sns.us-east-1.amazonaws.com and Expo Push Notifications at https://exp.host/--/api/v2/push/send.

Other comparisons with Amazon SNS or Expo Push Notifications

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