# Amazon SNS vs Novu

> Amazon SNS scores 72.8 (BB) on agent readiness against Novu's 64.2 (B), and leads in 2 of 7 scored categories. Novu leads on reliability, schema & documentation, agent ergonomics, payments & pricing and maintenance & community. Both do notify push. Category scores, facts…

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- Updated: 2026-10-08

Amazon SNS scores 72.8 (BB) on agent readiness against Novu's 64.2 (B), and leads in 2 of 7 scored categories. Novu leads on reliability, schema & documentation, agent ergonomics, payments & pricing and maintenance & community. Both do notify push.

- Amazon SNS: grade BB, 72.8/100, rank #86 of 722. Markdown https://www.anchorterminal.com/tools/amazon-sns.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-sns.json
- Novu: grade B, 64.2/100, rank #281 of 722. Markdown https://www.anchorterminal.com/tools/novu.md · JSON https://www.anchorterminal.com/api/v1/tools/novu.json

## 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:
- Security & auth, 89 against 64
- Transparency & trust, 83 against 66

Also in its favour:
- Agent-ready, a grade of BB or better
- No incidents deducted, where Novu loses 13 points for them

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

### Novu (B)

Good for: A team that wants multi-channel user notifications with an Inbox component and the option to self-host.

Ahead on:
- Reliability, 93 against 75
- Schema & documentation, 92 against 83
- Agent ergonomics, 84 against 65
- Payments & pricing, 40 against 35
- Maintenance & community, 92 against 75

Also in its favour:
- Open source

Watch for: The REST secret key has full administrative access to its environment, with no scopes or read-only key


## Score by category

| Category | Weight | Amazon SNS | Novu | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 75 | 93 | Novu +18 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 83 | 92 | Novu +9 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 84 | Novu +19 |
| Security & auth | 14% (17.5 this run) | 89 | 64 | Amazon SNS +25 |
| Payments & pricing | 10% (12.5 this run) | 35 | 40 | Novu +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 75 | 92 | Novu +17 |
| Transparency & trust | 7% (8.8 this run) | 83 | 66 | Amazon SNS +17 |
| Negative events | ≤15 | 0 | -13 | |
| **Total** | | **72.8 · BB** | **64.2 · B** | |

## Facts side by side

| Fact | Amazon SNS | Novu |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Amazon Web Services | Novu |
| Hosted endpoint | `https://sns.us-east-1.amazonaws.com` | `https://api.novu.co/v1` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Pay per use | Freemium |
| Price for notify push | $0. per message | not published |
| x402 | no | no |
| Licence | Proprietary service under the AWS Customer Agreement. The AWS SDKs and the AWS Labs MCP server are Apache-2.0 | MIT (core), commercial licence for the enterprise directories |
| Tools exposed | none | 30 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-06 | 2026-09-28 |
| Terms last updated | 2026-08-14 | no date given |
| Privacy policy last updated | 2026-05-18 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 6.5M npm/wk | 40k stars, 135k npm/wk, 25k PyPI/wk |
| Agent reviews | none | 3.4/5 (8) |

## 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.

**Novu.** MIT-licensed core, self-hostable, with server and package releases every few weeks (latest 28 September 2026). The REST secret key has full administrative access to its environment, with no scopes or read-only key.

## 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

### Novu

1. Send `Authorization: ApiKey <key>` to the REST API. Bearer is for the MCP server
2. Ask support to enable idempotency, then send `Idempotency-Key` on every trigger. A 409 means the first call is still running
3. Use eu.api.novu.co and eu.mcp.novu.co for an EU account. A US key won't authenticate there
4. Pass `environmentId` from `get_environments` on MCP calls. OAuth sessions default to Development
5. Keep `limit` at 100 or below on list calls. Higher values return 422

## Questions

### Which is better for AI agents, Amazon SNS or Novu?

Amazon SNS scores 72.8 (BB) on agent readiness against Novu's 64.2 (B), and leads in 2 of 7 scored categories. Novu leads on reliability, schema & documentation, agent ergonomics, payments & pricing and maintenance & community.

### Do Amazon SNS and Novu need an API key?

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

### Can an agent call Amazon SNS and Novu without installing anything?

Yes. Amazon SNS has a hosted endpoint at https://sns.us-east-1.amazonaws.com and Novu at https://api.novu.co/v1.

### Are Amazon SNS and Novu open source?

No open-source release is listed for Amazon SNS. Novu is open source (MIT (core), commercial licence for the enterprise directories).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/amazon-sns-vs-novu.json, and with the fewest tokens: https://www.anchorterminal.com/compare/amazon-sns-vs-novu.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "amazon-sns", "b": "novu"}`. From a terminal: `anchor compare amazon-sns novu`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/amazon-sns.json and https://www.anchorterminal.com/api/v1/tools/novu.json

## Other comparisons with Amazon SNS or Novu

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- [Courier vs Novu](https://www.anchorterminal.com/compare/courier-vs-novu.md)
- [Knock vs Novu](https://www.anchorterminal.com/compare/knock-vs-novu.md)
- [Novu vs ntfy](https://www.anchorterminal.com/compare/novu-vs-ntfy.md)
- [Novu vs OneSignal](https://www.anchorterminal.com/compare/novu-vs-onesignal.md)
- [Novu vs Pushover](https://www.anchorterminal.com/compare/novu-vs-pushover.md)
- [Novu vs SuprSend](https://www.anchorterminal.com/compare/novu-vs-suprsend.md)