Sinch WhatsApp Business API

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box

Avoid if: You need transparent pricing up front; You want to try it free before paying

• █████░░░░░
  50 / 100
  Agent friendliness
• █▒░░░░░░░░
  15 / 100
  Pricing transparency
• ██████░░░░
  60 / 100
  Setup speed
• ███▒░░░░░░
  35 / 100
  Docs quality
• █████▒░░░░
  55 / 100
  Procurement ease
• ██████▒░░░
  65 / 100
  Trust readiness

Scores are computed deterministically from this profile's published, sourced fields (pricing, compliance, capabilities, docs and developer-surface signals) - not from reviews or paid placement. Each axis is 0-100; an unknown signal scores 0 for that axis. Procurement ease is the inverse of buying friction (higher = easier to adopt).

Pricing model

Contact sales [2]sinch.com/pricing/“Pricing page covers SMS, Voice, and RCS with pay-as-you-go pricing but no WhatsApp Business API platform fee or per-message markup is published.”sinch.com/blog/whatsapp-business-pricing/“the final cost might vary and also depend on additional functionalities like automations, chatbots, CRM integrations, access to other messaging tools, and more.”

Published pricing

✗ No [3]sinch.com/blog/whatsapp-business-api/“Enterprises: Per-message pricing with volume discounts. The offered price depends on the number of provisioned WhatsApp phone numbers you are using and the total messaging traffic.”sinch.com/pricing/“No specific WhatsApp Business API platform fee or per-message markup is published on sinch.com/pricing or any public product page.”

Free tier

✗ No [4]sinch.com/blog/whatsapp-business-api/“WhatsApp Business API: Paid only; no free tier. SMBs: 14-day free trial available, then commit-based pricing.”

Free tier details

Meta provides 1,000 free service conversations per month per WABA ID. Sinch offers a 14-day free trial for SMBs. Free Entry Point conversations (72-hour window) apply when users initiate via click-to-WhatsApp ads or Facebook Page buttons - no template charges during that window. [5]sinch.com/blog/whatsapp-business-api/“14-day free trial for SMBs to test messaging flows.”sinch.com/blog/whatsapp-business-pricing/“When a user initiates contact via click-to-WhatsApp ads or Facebook actions, businesses receive a 72-hour free messaging window to respond with templates at no charge.”

Self-serve signup

✓ Yes [6]sinch.com/messaging/whatsapp-business-api/“Try for free button directs to dashboard.sinch.com/signup — self-serve signup available.”

Requires sales call

✗ No

Enterprise plan

✓ Yes [7]sinch.com/blog/whatsapp-business-api/“Enterprise (500+ employees needing omnichannel, multi-region capabilities). Enterprises: Per-message pricing with volume discounts.”

Supported actions

send_template_message, send_session_message, send_media (image/video/audio/document/sticker), interactive_buttons (quick reply / CTA), list_messages, whatsapp_flows, catalog / product_list_messages, payments (Brazil beta), location_messages, location_request, authentication_templates, inbound_webhooks, template_management, message_status_callbacks (sent/delivered/read/failed), phone_number_registration (Embedded Signup / Partner-initiated), opt_in_opt_out_handling, click-to-whatsapp_ads_integration, explicit_cloud_api_json_passthrough

Regions

global, EU data hosting, US data hosting

Languages

AF, AR, AZ, BG, BN, CA, CS, DA, DE, EL, EN, FR, and 60+ additional Meta-supported template languages

Input types

text, template, image, video, audio, document, sticker, interactive buttons / quick replies, interactive lists, location, contacts, product catalog items, flows

Output types

message_status (queued/delivered/read/failed), inbound message webhook, delivery receipts with pricing_type and pricing_category metadata, conversation analytics, opt-in/opt-out events, template status change events, channel quality rating events

Webhooks

✓ Yes [8]developers.sinch.com/docs/conversation/callbacks“MESSAGE_INBOUND — subscribe to inbound messages from end users on the underlying channels. MESSAGE_DELIVERY — subscribe to delivery receipts for app messages. OPT_IN/OPT_OUT — opt-in/out registration status (WhatsApp supports these). x-sinch-webhook-signature-algorithm — Currently set to HmacSHA256.”

Sandbox / test mode

✗ No [9]developers.sinch.com/docs/conversation/channel-support/whatsapp/message-support“No sandbox environment mentioned; content focuses on production implementation through the Conversation API.”developers.sinch.com/docs/conversation/channel-support/whatsapp/set-up“You must ensure that you have a postpay Sinch account. No sandbox, test mode, or test numbers mentioned for WhatsApp; a real WABA and phone number are required.”

SDK languages

Node.js, Python, Java, C#/.NET [10]developers.sinch.com/docs/sdks/“The Sinch SDKs allow you to quickly start interacting with the suite of Sinch APIs inside your favorite programming languages. Node.js SDK, Java SDK (V2), .NET SDK, Python SDK (V2).”

MCP server

✓ Yes [11]github.com/sinch/sinch-mcp-server“Send a message using a predefined WhatsApp template... The Conversation API supports WhatsApp (including template messages).”

SOC 2

SOC 2 Type II [12]sinch.com/security/“SOC 2 Type 1 & 2 certifications. Sinch Voice is GDPR and CCPA compliant and ISO 27001 certified.”sinch.com/news/sinch-secures-hipaa-compliance-validation-security-voice-fax-and-ucaas/“expanding its compliance suite related to ISO 27001, ISO 9001, PCI-DSS and SOC 2 Type II reporting”

HIPAA

✗ No [13]sinch.com/news/sinch-secures-hipaa-compliance-validation-security-voice-fax-and-ucaas/“Sinch Earns HIPAA Validation for Voice, UCaaS Security — SIP trunking, voice termination, UCaaS, and fax services. WhatsApp is not mentioned.”sinch.com/hipaa/“Sinch has various products and solutions where the HIPAA compliance framework has been implemented — page does not specify which products include WhatsApp; HIPAA validation confirmed only for voice/fax/UCaaS from the news release.”

GDPR

✓ Yes [14]sinch.com/security/“GDPR and CCPA compliant confirmed in compliance FAQ.”sinch.com/messaging/whatsapp-business-api/“GDPR compliant. India IT Act compatible. California Consumer Privacy Act alignment.”

ISO 27001

✓ Yes [15]sinch.com/blog/building-trust-with-iso-27001-certification/“Our voice, video, and operator software are now fully compliant with the standard. Certificate No: 00214 under ISO/IEC 27001 – 2022.”sinch.com/security/“ISO 27001 certified.”

PCI DSS

✓ Yes [16]sinch.com/news/sinch-secures-hipaa-compliance-validation-security-voice-fax-and-ucaas/“expanding its compliance suite related to ISO 27001, ISO 9001, PCI-DSS and SOC 2 Type II reporting”

Published SLA

✗ No [17]sinch.com/legal/conversation-api/“Conversation API legal hub covers data retention and channel requirements; no SLA or uptime guarantees are stated for this product.”sinch.com/legal/terms-and-conditions/other-sinch-terms-conditions/messaging-service-level-agreement-sla/“The SLA applies to Messaging, Voice or/and Video and Verification services ordered by the Customer under an Order Form. WhatsApp is not mentioned in this SLA document.”

Rate limits

Conversation API: 800 requests per second across all apps and most endpoints (API rate limit). WhatsApp channel throughput: maximum 20 messages per second per legal terms. Meta messaging tiers: Tier 1 = 1,000 unique users/24 hours; Tier 2 = 10,000; Tier 3 = 100,000. Tier limits restrict unique users reached, not total message count. [18]sinch.com/legal/whatsapp-business-api/“maximum throughput of 20 messages per second”developers.sinch.com/docs/conversation/api-reference/conversation/section/overview/rate-limits“Projects are limited to 800 requests per second across all apps and most endpoints.”

Known restrictions

Requires Meta Business verification (WABA creation), Template messages must be pre-approved by Meta before use outside customer service window, 24-hour customer service window for session messages, Resale of the service by customers is prohibited, ISVs require prior written approval from Sinch before onboarding, WhatsApp Flows provisioning requires Sinch Professional Services, Payments feature is Brazil beta only, Media URLs from messages are valid for 7 days only, Quality rating throttling: poor quality can demote messaging tiers, Sinch can terminate service with 30 days written notice for any reason, Choice messages limited to 3 options max, 20 characters each, Data hosting regions limited to EU and US for sender creation, Requires postpay Sinch account to create WhatsApp senders, Per-message pricing (not per-conversation) effective July 1, 2025 [19]developers.sinch.com/docs/conversation/channel-support/whatsapp/message-support“Flows requires Sinch Professional Services provisioning. Media URLs valid for 7 days only. Choice message limitations: 3 options max, 20 characters per option.”sinch.com/legal/whatsapp-business-api/“Customer may not resell the Services or allow third parties to integrate with, access or use the Services. All third-party integrators must execute ISV Terms. Prior written approval needed before onboarding new ISVs. Sinch may terminate with or without cause upon thirty (30) days advance written notice.”developers.sinch.com/docs/provisioning-api/getting-started/whatsapp“You must ensure that you have a postpay Sinch account. Region enum values are EU, US, AS, AU and SA, with only EU and US currently supported for creating senders.”

• Docs
• API reference
• Status page

Docs rendering: static

API style

rest

Base URL

https://us.conversation.api.sinch.com

Version

v1

Versioning

url

Stability

ga

Auth methods

oauth2, basic

Error format

vendor-specific (Google RPC JSON)

Webhook signing

x-sinch-webhook-signature (HmacSHA256)

Rate limit

800 / second

SDKs

• Node.js @sinch/sdk-core · repo
• Python sinch · repo
• Java com.sinch.sdk:sinch-sdk-java · repo
• C#/.NET Sinch · repo

• Auth docs
• Quickstart
• MCP server
• Webhook events
• Deprecation policy

Launched

2020-10-29

GA

2020-10-29

Notable customers

Google, Uber, PayPal, Visa, Albertsons, Tinder, First Bank

• Twilio WhatsApp Business API

  "Enable businesses to engage customers through WhatsApp messaging and calling via programmable APIs" connecting "3+ billion users on the world's most popular messaging app"

  Usage · public pricing · self-serve

• Bird WhatsApp API (MessageBird)

  "Engage customers worldwide with WhatsApp API" - Bird connects marketing, service, and operations teams with customers on the world's most popular messaging app through rich message templates, interactive elements, product catalogs, and one-click payments via a unified API platform.

  Hybrid · public pricing · self-serve

• Vonage Messages API (WhatsApp)

  "The Vonage Messages API integrates with SMS, MMS, RCS, WhatsApp, Messenger, Viber, and Email allowing you to communicate with your customers on the channels they like." - Vonage Messages API enables businesses to send and receive WhatsApp messages via a unified multichannel messaging platform.

  Usage · public pricing · self-serve

• Infobip WhatsApp Business API

  "Meta-authorized partner that provides businesses with secure access to WhatsApp's messaging infrastructure, enabling secure interactions, 24/7 customer support, and unique experiences at scale."

  Sales-led · self-serve

• WhatsApp Cloud API (Meta)

  "The Cloud API, hosted by Meta, allows you to implement WhatsApp Business APIs without the cost of hosting your own servers and also allows you to more easily scale your business messaging."

  Usage · public pricing · self-serve

• 360dialog WhatsApp Business API

  "WhatsApp Business solutions that drive real results"

  Hybrid · public pricing · self-serve

Sinch WhatsApp Business API alternatives · Sinch WhatsApp Business API vs Twilio WhatsApp Business API · All WhatsApp Business APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: sinch.com
2. ↑Pricing model: sinch.com · sinch.com
3. ↑Published pricing: sinch.com · sinch.com
4. ↑Free tier: sinch.com
5. ↑Free tier details: sinch.com · sinch.com
6. ↑Self-serve signup: sinch.com
7. ↑Enterprise plan: sinch.com
8. ↑Webhooks: developers.sinch.com
9. ↑Sandbox: developers.sinch.com · developers.sinch.com
10. ↑SDK languages: developers.sinch.com
11. ↑MCP server: github.com
12. ↑SOC 2: sinch.com · sinch.com
13. ↑HIPAA: sinch.com · sinch.com
14. ↑GDPR: sinch.com · sinch.com
15. ↑ISO 27001: sinch.com · sinch.com
16. ↑PCI DSS: sinch.com
17. ↑Published SLA: sinch.com · sinch.com
18. ↑Rate limits: sinch.com · developers.sinch.com
19. ↑Known restrictions: developers.sinch.com · sinch.com · developers.sinch.com

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-16 Summary Md: (none) → Sinch WhatsApp Business API is a REST API for businesses that need to send and …
2. 2026-06-16 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
3. 2026-06-16 Score Pricing Transparency: (none) → 15
4. 2026-06-16 Score Setup Speed: (none) → 60
5. 2026-06-16 Score Docs Quality: (none) → 35
6. 2026-06-16 Score Procurement Friction: (none) → 55
7. 2026-06-16 Score Trust Readiness: (none) → 65
8. 2026-06-16 Best For: (none) → Regulated or enterprise workloads - compliance attestations and an enterprise p…
9. 2026-06-16 Avoid If: (none) → You need transparent pricing up front, You want to try it free before paying
10. 2026-06-16 Score Agent Friendliness: (none) → 50
11. 2026-06-16 Has Structured Data: (none) → Yes
12. 2026-06-16 Robots Allows Agents: (none) → Yes
13. 2026-06-16 API Reference URL: (none) → https://sinch.com/es/phone-numbers/api-de-numeros-de-telefono/
14. 2026-06-16 Status Page URL: (none) → https://status.sinch.com
15. 2026-06-16 Docs URL: (none) → https://docs-latam.messaging.sinch.com/
16. 2026-06-16 Rendering: (none) → static
17. 2026-06-16 Llms Txt Present: (none) → No
18. 2026-06-16 Has Published Pricing: set to No
19. 2026-06-16 Free Tier Available: set to No
20. 2026-06-16 Free Tier Details: set to Meta provides 1,000 free service conversations per month per WABA ID. Sinch off…
21. 2026-06-16 Self Serve Signup: set to Yes
22. 2026-06-16 Requires Sales Call: set to No
23. 2026-06-16 Enterprise Plan Available: set to Yes
24. 2026-06-16 SOC 2: set to type_2
25. 2026-06-16 HIPAA: set to No
26. 2026-06-16 GDPR: set to Yes
27. 2026-06-16 ISO 27001: set to Yes
28. 2026-06-16 PCI DSS: set to Yes
29. 2026-06-16 SLA Published: set to No
30. 2026-06-16 SLA URL: set to https://sinch.com/legal/terms-and-conditions/other-sinch-terms-conditions/messa…
31. 2026-06-16 Data Retention Policy URL: set to https://sinch.com/legal/privacy-notice/
32. 2026-06-16 Documented Rate Limits: set to Conversation API: 800 requests per second across all apps and most endpoints (A…
33. 2026-06-16 Rate Limit Requests: set to 800
34. 2026-06-16 Rate Limit Window: set to second
35. 2026-06-16 Known Restrictions: set to Requires Meta Business verification (WABA creation), Template messages must be …
36. 2026-06-16 Auth Methods: set to oauth2, basic
37. 2026-06-16 Auth Docs URL: set to https://developers.sinch.com/docs/conversation/api-reference/conversation/secti…
38. 2026-06-16 API Style: set to rest
39. 2026-06-16 Base URL: set to https://us.conversation.api.sinch.com
40. 2026-06-16 API Version: set to v1
41. 2026-06-16 Versioning Scheme: set to url
42. 2026-06-16 Stability: set to ga
43. 2026-06-16 Deprecation Policy URL: set to https://developers.sinch.com/docs/conversation/release-notes
44. 2026-06-16 MCP URL: set to https://github.com/sinch/sinch-mcp-server
45. 2026-06-16 Quickstart URL: set to https://developers.sinch.com/docs/conversation/getting-started
46. 2026-06-16 Error Format: set to vendor-specific (Google RPC JSON)
47. 2026-06-16 Webhook Signing: set to x-sinch-webhook-signature (HmacSHA256)
48. 2026-06-16 Slug: set to sinch-whatsapp
49. 2026-06-16 Requires Verification: set to Yes
50. 2026-06-16 Price Basis: set to per message

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