TRANSPARENT COMMERCIAL ECONOMICS

Developer-first managed delivery. Zero vendor markups.

Complete high-speed email delivery with 2048-bit DKIM signing, instant OTP verification at $0 check fees, and seamless billing in your local currency.

MonthlyAnnual 20% OFF

Free Trial

3,000 / MO

For side projects, prototyping, and staging environments.

$0 / 30 days

No credit card required

Included Volume:3,000 emails

Custom Domains:1

Log Retention:3 days

Support SLA:Community & Docs

✓3,000 emails / month (100 / day cap)

✓1 verified custom sending domain (DKIM & SPF)

✓Shared Sendrin delivery pool (managed SMTP relay)

✓Transactional & Instant OTP Email API

✓Interactive OTP Playground & SDKs

✓3-day searchable delivery history

✓No credit card required at signup

Start Free Trial (No Card)

Starter

50,000 / MO

For early startups, indie makers, and growing apps.

$15 / month

Billed annually · Saves 20%

Included Volume:50,000 emails

Custom Domains:3

Overage Rate:$0.40 / 1k

Log Retention:15 days

Support SLA:Standard (24–48h)

✓50,000 emails / month included

✓3 verified custom sending domains

✓Multi-Channel: 1-Click WhatsApp + BYOP SMS

✓Free Instant OTP Verification ($0 check fees)

✓Low overage: $0.40 (₹30) / 1,000 emails

✓15-day searchable delivery logs & tracking

✓Standard email & chat support (24–48h)

Deploy Starter Tier

Growth

150,000 / MO

For fast-scaling SaaS products and high-volume platforms.

$39 / month

Billed annually · Saves 20%

Included Volume:150,000 emails

Custom Domains:10

Overage Rate:$0.35 / 1k

Log Retention:30 days

Support SLA:Priority (12h)

✓150,000 emails / month included

✓10 verified custom sending domains

✓Dynamic visual templates with versioning

✓Sub-15ms Failover Circuit Breaker

✓Lowest overage: $0.35 (₹25) / 1,000 emails

✓Higher API rate limits (300 req/min)

✓30-day searchable logs & bounce analytics

✓Priority email support (under 12 hours)

Deploy Growth Tier

Scale

400,000 / MO

For scaling companies with mission-critical deliverability.

$79 / month

Billed annually · Saves 20%

Included Volume:400,000 emails

Custom Domains:25

Overage Rate:$0.25 / 1k

Log Retention:60 days

Support SLA:VIP (4h Fast)

✓400,000 emails / month included

✓25 verified custom sending domains

✓Dedicated sending queue (zero spike latency)

✓Unlimited workspace team members with RBAC

✓Volume overage: $0.25 (₹20) / 1,000 emails

✓Dedicated IP option available ($30 / ₹2,500/mo)

✓60-day searchable activity logs & audit trail

✓VIP fast-response support (under 4 hours)

Deploy Scale Tier

Enterprise & High-Volume Telco

1,000,000+ EMAILS / MO

Dedicated IP pools with automated reputation warmup, 99.999% uptime SLAs with contractual remedies, custom SOC 2 / HIPAA compliance, and a dedicated 24/7 Slack bridge.

✓ Unlimited Verified Domains✓ Custom Invoicing & Wire Transfers✓ Dedicated Account Manager

Volume & Savings Calculator

100,000emails / month

100k notifications

10k100k500k1M5M+

Recommended Plan: Growth(150,000 included)

Select Growth →

Included with every plan:⚡ Managed email sending🛡️ Automatic DKIM & SPF setup🔒 Bounce protection💬 Bring your own WhatsApp & SMS provider

DELIVERY COST BENCHMARKWHOLESALE PRICING

Postmark / Resend Avg:$98/mo

Sendrin Managed Delivery:$39/mo

Your Annual Savings

$708 / year

~60% lower bill than legacy providers

⚡ PREPAID RECHARGE POOLS

On-Demand Wallet Top-Ups

Need extra capacity for an upcoming product launch or flash sale? Top up instantly. Credits never expire and require no change to your monthly plan.

Small Boost10,000 EMAILS

$5/ recharge

Unit Rate:$0.50 / 1k

One-time payment. Adds 10,000 verified email credits immediately to your tenant wallet.

Recharge Credits →

BEST VALUE

Medium Boost50,000 EMAILS

$18/ recharge

Unit Rate:$0.36 / 1k

One-time payment. Adds 50,000 verified email credits immediately to your tenant wallet.

Recharge Credits →

Large Boost100,000 EMAILS

$32/ recharge

Unit Rate:$0.32 / 1k

One-time payment. Adds 100,000 verified email credits immediately to your tenant wallet.

Recharge Credits →

Mega Boost250,000 EMAILS

$70/ recharge

Unit Rate:$0.28 / 1k

One-time payment. Adds 250,000 verified email credits immediately to your tenant wallet.

Recharge Credits →

Commercial Add-ons

Available to attach to any Starter, Growth, or Scale subscription tier.

ATTACH ANYTIME

Additional Verified Domain$5/ domain / mo

Add an extra custom brand sending domain with dedicated SPF and 2048-bit DKIM keys.

Dedicated IP Address$30/ IP / mo

Clean, isolated IP address with automated warmup curves to protect high-volume sending.

365-Day Log Retention$25/ mo

Extend full event history, bounce payloads, and telemetry storage to 1 full calendar year.

📊 SPECIFICATION BREAKDOWN

Comprehensive Feature Comparison

Compare quotas, channels, deliverability architecture, and support commitments across all tiers.

Features & Capabilities	Free Trial	Starter	Growth	Scale	Enterprise
EMAIL ALLOWANCE & CAPACITIES
Monthly Included Emails	3,000	50,000	150,000	400,000	1,000,000+
Daily Sending Cap	100 / day	No Daily Limit	No Daily Limit	No Daily Limit	No Daily Limit
Overage Rate (per 1,000)	Upgrade Req.	$0.40	$0.35	$0.25	Volume Discount
Custom Sending Domains	1	3	10	25	Unlimited
DELIVERABILITY & INFRASTRUCTURE
Delivery Relaying Pool	Shared Pool	Standard Relay	High-Priority Relay	Dedicated Sending Queue	Dedicated Warm IP Pool
Automated SPF & 2048-bit DKIM	✓	✓	✓	✓	✓
Dedicated IP Availability	—	—	Add-on available	$30 / mo	Included
Automated Bounce Protection	✓	✓	✓	✓	✓
MULTI-CHANNEL & DEVELOPER TOOLS
Free Instant OTP Verification	✓	✓	✓	✓	✓
1-Click WhatsApp Business	—	✓	✓	✓	✓
Bring Your Own SMS (Twilio/Plivo)	—	✓	✓	✓	✓
Dynamic Templates with Variables	Basic	Basic	Visual Studio	Visual Studio	Visual Studio + Custom
API Rate Limit	60 req/min	120 req/min	300 req/min	600 req/min	Bespoke / Unlimited
ANALYTICS, LOGS & AUDITING
Searchable Event Logs	3 Days	15 Days	30 Days	60 Days	365 Days
Telemetry & Bounce Diagnostics	Basic	✓	✓	✓	✓
SUPPORT COMMITMENT & SLA
Support Response Target	Community	24–48 hours	< 12 hours	< 4 hours VIP	24/7 Slack / Pager
Guaranteed Uptime SLA	—	99.9%	99.95%	99.99%	99.999% Contractual

❓ COMMERCIAL FAQS

Frequently Asked Questions

Clear answers about our managed delivery engine, multi-currency billing, and deliverability guarantees.

Sendrin provides a complete managed email sending engine competing with Resend and Postmark. Simply add your custom domain (e.g. brand.com), configure the provided automated DNS records (SPF, 2048-bit DKIM, Return-Path), and Sendrin's managed SMTP relay handles cryptographic signing, inbox deliverability, and connection pooling automatically.

INSTANT DEPLOYMENT

Start free today. Scale to millions when ready.

One API, every channel, full delivery visibility. Start free, no credit card required.

Start Sending — Free

Read the Docs ↗