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India Cloud Infrastructure & Sub-Continent EdgeDPDP Act 2023 Compliant

High-speed, cost-effective transactional email for Indian startups & developers

Deliver OTP verification codes, payment receipts, and AI notifications with low latency across India. DPDP Act 2023 compliance, and affordable scale pricing.

3,000 emails/month freeZero credit card requiredSub-20ms edge latency
202 Accepted
Edge latency
Queued durably before any provider call
< 1.5s
OTP Arrival Speed
End-to-end delivery
6,000
Free Monthly Sends
Custom domain DKIM
Developer Ergonomics

Drop into your application in under 60 seconds

Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.

$npm install sadasend
mumbai-edge-dispatch.ts
typescript
TYPESCRIPT
import { SadaSend } from 'sadasend';

// Accepted and queued on the call; delivery is asynchronous
const sadasend = new SadaSend(process.env.SADASEND_API_KEY!);

export async function sendOtpVerification(user: { email: string; otp: string }) {
  const result = await sadasend.emails.send({
    from: 'Verify <auth@yourdomain.in>',
    to: user.email,
    subject: `${user.otp} is your verification code`,
    html: `<p>Your one-time code is <strong>${user.otp}</strong>. Valid for 10 minutes.</p>`,
    tags: ['otp', 'in-region']
  });

  console.log('Accepted, message id:', result.id);
  return result;
}

Accepted on the API call and queued durably, for OTP delivery and high-volume e-commerce scale.

Core Infrastructure

Engineered for high deliverability and zero incident risk

Every layer from edge connection pooling to per-key rate limits is designed to keep critical transactional dispatches fast, reliable, and contained.

DPDP Act 2023 Alignment

Local Indian edge nodes process API calls locally, avoiding high latency over trans-Pacific cables to ensure OTPs arrive in seconds.

DPDP Act 2023 Alignment

Complies with Digital Personal Data Protection Act requirements for data encryption, recipient consent, and security auditing.

Affordable Scale Pricing

Engineered for high-volume Indian startups. Save up to 70% compared to legacy providers with excessive dollar conversion fees.

Instant OTP & Auth Delivery

fast ingestion ensures time-critical 2FA verification codes and password reset links land in user inboxes before expiring.

AI Agent Guardrails & Tripwires

Prevent unintended cost spikes from autonomous AI agents with strict per-hour velocity limits and recipient allowlists.

6,000 Free Monthly Sends

Generous permanent free tier with custom .in and .co.in domain DKIM signatures, webhook callbacks, and delivery logs.

Architectural Comparison

SadaSend vs US-Based Legacy Providers

Why Indian startups choose SadaSend over expensive legacy providers with slow international routing.

Feature & CapabilitySadaSendUS-Based Legacy Providers
Accepted and queued on the API callRoutes calls to US servers (280ms+ lag)
OTP Delivery Speed< 1.5 seconds end-to-end10–45 second queue delays
Competitive Pricing for High VolumeTransparent flat scale tiersExpensive USD billing with heavy markups
AI Agent Safety Controls
Synchronous API Error Reporting202 Accepted with silent drops
Free Tier with Custom Domain6,000 sends foreverSevere trial limitations
Forever Free Tier
Transparent Economics

Start with 3,000 emails every month at zero cost

No artificial paywalls on security. Unlike legacy providers that reserve recipient allowlists or dedicated IP pools for high enterprise tiers, every SadaSend account receives full safety controls from day one.

3,000 dispatches monthly forever with zero credit card
All safety gates, allowlists, and velocity limits included
Scale seamlessly: Starter ($12/mo for 10k), Pro ($19/mo for 50k), Scale ($79/mo for 250k)
Free Developer Plan
$0 / mo

No credit card required

Create Free AccountCompare all paid plan tiers
Frequently Asked Questions

Everything you need to know about transactional email API India

Clear, transparent answers on deliverability, API authentication, and rate limits.

Our servers are in the EU, so an Indian API call is a long round trip. That is why the send is accepted and queued on the call instead of blocking on a provider. SadaSend ingests requests in Mumbai (BOM) in under 20ms.
Technical Deep Dives

Related developer guides and architectural tutorials

Explore step-by-step production implementation blueprints, benchmarks, and protocols.