1B+ emails delivered this month

Communications
infrastructure
for the world

Send transactional and marketing emails, SMS, and push notifications at any scale. 99.9% deliverability. Trusted by companies sending billions of messages monthly.

Start for free View API docs

Free plan available · No credit card required · SOC 2 certified

28.40M emails sent today — live

1import Delark from '@delark/sdk'
2
3const delark = new Delark({
4  apiKey: process.env.DELARK_API_KEY,
5})
6
7await delark.email.send({
8  to:      'user@example.com',
9  from:    'noreply@yourapp.com',
10  subject: 'Welcome to your account',
11  template: {
12    id:   'welcome-email',
13    data: { name: 'Jane', plan: 'Pro' },
14  },
15})
16
17// ✓ Delivered in 1.2s

Performance

Built for billion-message scale

Numbers that matter. Measured in production, not in benchmarks.

0B+

Emails per month

Sent across shared and dedicated infrastructure

0.0%

Inbox delivery rate

Average across all senders and ISPs

0.0s

Median delivery speed

From API call to inbox

0.00%

Platform uptime SLA

Monitored across all regions

Countries reached

SMS delivered globally

0K/s

Peak throughput

Messages per second capacity

Platform

Everything you need, nothing you don't

One platform for all your communication channels. Start with email, add SMS and push when you're ready.

Email API

REST API and SMTP relay. SDKs for Node.js, Python, Go, PHP, Ruby, and Java. Send transactional and marketing emails from one API.

REST APISMTP relaySDKsDynamic templates

SMS API

Global SMS delivery to 200+ countries. Short codes, long codes, and toll-free numbers. Two-way messaging with webhooks.

200+ countriesTwo-way SMSShort codesWebhooks

Push Notifications

iOS (APNs), Android (FCM), and Web Push from a unified API. Rich notifications, deep links, and delivery receipts.

iOS & AndroidWeb PushRich mediaDeep links

Deliverability Suite

SPF, DKIM, DMARC, BIMI authentication. Real-time email validation, suppression management, and reputation monitoring.

DKIM/DMARC/BIMIReputation monitoringList hygieneFBL integration

Real-time Analytics

Delivery, open, click, bounce, and complaint tracking in real time. Dashboards, exports, and ClickHouse-powered queries.

Real-time eventsCustom dashboardsWebhooksData export

Global Infrastructure

Multi-region MTA infrastructure with dedicated IP pools. ISP peering with Gmail, Outlook, Yahoo, Apple, and more.

Dedicated IPsIP warmingISP peeringMulti-region

Automations & Journeys

Visual workflow builder for multi-step sequences. Trigger-based sends, A/B testing, and behavioral segmentation.

Visual builderA/B testingBehavioral triggersMulti-channel

Developer-first

OpenAPI 3.1 spec, interactive docs, code exchange with 100+ pre-built solutions, and generous free tier to test.

OpenAPI 3.1Interactive docsCode exchangeFree tier

Deliverability Suite

Inbox, not spam.
Guaranteed.

Delark ships with a full deliverability toolkit built-in — no third-party tools required. Authentication setup, reputation monitoring, list hygiene, and inbox placement testing, all in your dashboard.

Automated SPF, DKIM, DMARC, and BIMI setup
Real-time reputation monitoring across 130+ RBLs
Feedback loop (FBL) integration with all major ISPs
Smart bounce classification and auto-suppression
IP warming automation for new dedicated IPs
Inbox placement testing across Gmail, Outlook, Yahoo

Sender reputation

yourcompany.com

97/ 100

SPF record

v=spf1 include:delark.io ~all

pass

DKIM signature

selector: delark._domainkey

pass

DMARC policy

p=quarantine; rua=dmarc@delark.io

pass

BIMI record

VMC verified — logo shown in Gmail

pass

Blacklist check

Clean on 130+ RBLs

pass

Bounce rate

2.1% — review list hygiene

warning

Complaint rate

0.04% — well below 0.1% threshold

pass

Trusted by companies sending billions of messages

Acme Corp

DataFlow

NexGen

CloudScale

ShipFast

LaunchPad

GrowthX

TechBase

Nucleus

Velocity

"We switched from our previous ESP and inbox rates jumped from 87% to 99.1%. The dedicated IP management and ISP peering made all the difference."

99.1%

Inbox rate

+14%

Open rate lift

María García

Head of Growth · DataFlow

"The API is genuinely the best I've worked with. Documentation is clear, SDKs are well-maintained, and the webhook reliability is flawless. Our devs love it."

< 30min

Integration time

Outages in 12mo

James Chen

CTO · ShipFast

"Sending 50M transactional emails/month and the deliverability tools keep us out of spam folders. The real-time analytics dashboard is a game changer."

50M/mo

Emails sent

< 2s

Delivery speed

Sarah Mueller

Email Operations Lead · NexGen

Pricing

Simple, transparent pricing

Start for free. Scale as you grow. No hidden fees, no surprises.

All plans include a 14-day free trial of Growth features.

Free

$0forever

Perfect to start and test

10K emails/month
500 SMS
REST API + SMTP
Dynamic templates
Basic analytics
1 sending domain

Get started free

Starter

$29/month

For growing teams

100K emails/month
5,000 SMS
Webhooks
Suppression management
Custom unsubscribe page
3 sending domains
Email support

Start free trial

Send your first email
in under 5 minutes

Free plan available. No credit card required. Upgrade when you're ready to scale.

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Communicationsinfrastructurefor the world

Built for billion-message scale

Everything you need, nothing you don't

Email API

SMS API

Push Notifications

Deliverability Suite

Real-time Analytics

Global Infrastructure

Automations & Journeys

Developer-first

Inbox, not spam.Guaranteed.

Simple, transparent pricing

Send your first emailin under 5 minutes

Communications
infrastructure
for the world

Inbox, not spam.
Guaranteed.

Send your first email
in under 5 minutes