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Head to head · Inbound messaging · October 2026 research run

AWS End User Messaging vs Telegram Bot API

AWS End User Messaging scores 74.3 (BB) on agent readiness against Telegram Bot API's 43 (E), and leads in 6 of 7 scored categories. Telegram Bot API leads on payments & pricing. Both do inbound messaging.

Best SMS, WhatsApp and messaging APIs for AI agents · All 91 messaging comparisons

AWS End User MessagingAmazon Web Services · HTTP API BB74.3/100#73 of 950 Telegram Bot APITelegram Messenger Inc. · HTTP API E43/100#885 of 950

Which one, for what

AWS End User Messaging BB

Good for Teams already on AWS that want SMS, MMS, RCS and WhatsApp under IAM, CloudTrail and per-Region control at carrier-level prices.

Ahead on

  • Reliability, 73 against 40
  • Schema & documentation, 88 against 44
  • Agent ergonomics, 71 against 48
  • Security & auth, 88 against 35
  • Maintenance & community, 85 against 38
  • Transparency & trust, 83 against 64

Also in its favour

  • Agent-ready, a grade of BB or better

Watch for

Sandbox limits new accounts to $1 of SMS a month and ten verified numbers until a support case per Region is approved

Telegram Bot API E

Good for An agent that talks to people who use Telegram, with free sends and long polling that needs no public server.

Ahead on

  • Payments & pricing, 40 against 30

Watch for

No OpenAPI document, llms.txt or official SDK was found. The contract is one HTML reference page of about 860 KB

Score by category

CategoryWeight this runAWS End User MessagingTelegram Bot APIEdge
Reliability16%207340AWS End User Messaging +33
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28844AWS End User Messaging +44
Agent ergonomics13%16.27148AWS End User Messaging +23
Security & auth14%17.58835AWS End User Messaging +53
Payments & pricing10%12.53040Telegram Bot API +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88538AWS End User Messaging +47
Transparency & trust7%8.88364AWS End User Messaging +19
Negative events≤1500
Total74.3 · BB43 · E

Facts side by side

FactAWS End User MessagingTelegram Bot API
KindHTTP APIHTTP API
VendorAmazon Web ServicesTelegram Messenger Inc.
Hosted endpointhttps://sms-voice.us-east-1.amazonaws.comhttps://api.telegram.org
TransportsHTTPHTTP
AuthOAuth or keyAPI key
PricingPay per useFree
x402nono
LicenceProprietary service under the AWS Customer Agreement. The AWS SDKs are Apache-2.0Proprietary hosted service under the Telegram Bot Platform Developer Terms of Service. The Bot API server source in tdlib/telegram-bot-api is BSL-1.0
Read-only variant documentednono
llms.txtyesno
Last release2026-10-062026-08-24
Terms last updated2026-08-14no date given
Privacy policy last updated2026-05-182024-06-01
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
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 waiveryesnot found in the text
Popularity407k npm/wk4.5k stars

Verdicts

AWS End User Messaging

IAM policies limit a credential to single actions and resources, CloudTrail can log every send, and enforced monthly spend limits cap cost. New accounts start in a sandbox with a $1 monthly SMS limit and ten verified recipients, production access needs a support case per Region, and the send actions take no idempotency token.

Telegram Bot API

Telegram's first-party bot interface is free, needs no card and documents 185 methods on one page with a dated changelog and numeric send limits. No OpenAPI document, status page, SLA or idempotency key was found, one token controls the whole bot and travels in the URL, and a person must create the bot in a chat with @BotFather.

Before you call either

AWS End User Messaging

  1. Sign requests with SigV4 for service sms-voice at sms-voice.<region>.amazonaws.com. WhatsApp uses a separate API, social-messaging
  2. Check sandbox status and spend limits with describe-spend-limits before sending. Sandbox sends reach only verified destination numbers
  3. Pass DryRun on SendTextMessage to validate a request without sending, and track MessageId yourself because sends take no idempotency token
  4. Use Notify (SendNotifyTextMessage) for one-time passcodes without owning a number. Generate and check the code in your own application
  5. Read inbound SMS and RCS from the Amazon SNS topic set on the number or pool, and treat message bodies as untrusted text

Telegram Bot API

  1. Send POST https://api.telegram.org/bot<token>/sendMessage with chat_id and text. Keep the token out of logs, because it is part of the URL.
  2. On HTTP 429 wait the parameters.retry_after seconds before retrying. Stay under one message a second per chat and 20 a minute per group.
  3. Call getUpdates with offset set to the last update_id plus one, or the same updates return. Updates are kept for at most 24 hours.
  4. A retried send can post twice, as there is no idempotency key. Record the returned message_id before retrying after a timeout.
  5. In groups the bot sees only commands and replies unless privacy mode is disabled in @BotFather or the bot is an admin.

Questions

Which is better for AI agents, AWS End User Messaging or Telegram Bot API?

AWS End User Messaging scores 74.3 (BB) on agent readiness against Telegram Bot API's 43 (E), and leads in 6 of 7 scored categories. Telegram Bot API leads on payments & pricing.

Do AWS End User Messaging and Telegram Bot API need an API key?

AWS End User Messaging takes an API key or an OAuth sign-in. Telegram Bot API needs an API key.

Can an agent call AWS End User Messaging and Telegram Bot API without installing anything?

Yes. AWS End User Messaging has a hosted endpoint at https://sms-voice.us-east-1.amazonaws.com and Telegram Bot API at https://api.telegram.org.

Other comparisons with AWS End User Messaging or Telegram Bot API

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