MSG91 vs Sinch SMS API

MSG91 and Sinch SMS API are both SMS APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. MSG91 starts lower at $0.0065 per message vs $0.0078 for Sinch SMS API. On compliance, Sinch SMS API additionally documents HIPAA. For coding-agent use, Sinch SMS API scores higher on agent-friendliness (75 vs 45).

Comparedby a transparent data-readiness score computed from each API's published, sourced fields. No reviews, no paid placement. How we rank.

Data last verified 2026-06-10, with every field cited on each profile.

Head-to-head, from published, cited fields (auto-generated; no paid placement)
Field	MSG91	Sinch SMS API
Starting price	$0.0065 1 SMS	$0.0078 message
Pricing model	Usage	Usage
Free tier	✗	✗
Self-serve signup	✓	✓
SOC 2	Type II	Type II
HIPAA	·	✓
GDPR	✓	✓
Webhooks	✓	✓
Sandbox	✗	✓
Documented actions	18	22

Full data and citations: MSG91 · Sinch SMS API. See more SMS APIs.