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Your application’s emails:
Delivered on time and to the inbox.
Trusted to send 25% of the world’s non-spam email
Being a premiere customer of the SparkPost service has allowed us to achieve high levels of reliability and performance … We are very excited to work with SparkPost.
Tara Clark, Director of Email
SparkPost provides us with the real-time email metrics we need. We can dynamically adjust our content and how we send email based on live feedback. All messages are one-to-one, based on users’ interests.
Seth Weisfeld, Engagement Manager With SparkPost's advice, we can find and solve problems before they become widespread and hard to mitigate. The proactive support we get from the team and their around-the-clock availability are second to none!
Penny-Merelle Gray, Delivery Customer SupportThe most performant email delivery service—whether your app or website sends hundreds, or billions, of messages
Deliver email, come rain or shine
Missing or delayed emails lead to customer churn. SparkPost offers unmatched inbox delivery and reliability backed by an enterprise SLA.
Powerful email analytics
Bounce, open, and click-through rates can indicate serious email delivery issues. Get real-time insight on your email delivery health.
Access the industry’s best experts
The world’s most demanding senders rely on our team. Our Technical Account Managers provide full-service support on a first-name basis.
More than just an email API—sophisticated features for applications big and small
Powerful templating, multiple webhook addresses, and multi-account features let you build applications that engage, retain, and rapidly grow your user base.
Missing or delayed product emails lead to customer churn
App-generated emails—often called transactional emails—are messages sent by your application or website in response to a user’s behavior. They play a critical role in acquiring and retaining users, and customers churn when transactional emails are delayed or lost in spam folders.
Activation Email
Welcome / Onboarding
User Invites and Sharing
Two Factor Authentication
Product Updates
Password Resets
Activity Notifications
Reports / Dashboards
Focus on delighting users, not managing email servers
Easily embed email into any app or website with SparkPost’s REST and SMTP email APIs.
Or use client libraries available for many popular languages.12345curl -XPOST \https://api.sparkpost.com/api/v1/transmissions \-H "Authorization: <YOUR API KEY>" \-H "Content-Type: application/json" \-d '{"options": {"sandbox": true}, "content": {"from": "[email protected]", "subject": "Oh hey", "text":"Testing SparkPost - the most awesomest email service in the world"}, "recipients": [{"address": "[email protected]"}]}'123456789101112131415161718192021222324const SparkPost = require('sparkpost');const sparky = new SparkPost('<YOUR API KEY>');sparky.transmissions.send({options: {sandbox: true},content: {subject: 'Oh hey!',html:'<html><body><p>Testing SparkPost - the world\'s most awesomest email service!</p></body></html>'},recipients: []}).then(data => {console.log('Woohoo! You just sent your first mailing!');console.log(data);}).catch(err => {console.log('Whoops! Something went wrong');console.log(err);});12345678910from sparkpost import SparkPostsparky = SparkPost('<YOUR API KEY>')response = sparky.transmissions.send(use_sandbox=True,html='<html><body><p>Testing SparkPost - the world\'s most awesomest email service!</p></body></html>',subject='Oh hey!')1234567891011121314151617181920212223<?phpuse SparkPost\SparkPost;use GuzzleHttp\Client;use Http\Adapter\Guzzle6\Client as GuzzleAdapter;$httpClient = new GuzzleAdapter(new Client());$sparky = new SparkPost($httpClient, ['key' => '<YOUR API KEY>']);$sparky->setOptions(['async' => false]);$results = $sparky->transmissions->post(['options' => ['sandbox' => true],'content' => ['subject' => 'Oh hey!','html' => '<html><body><p>Testing SparkPost - the world\'s most awesomest email service!</p></body></html>'],'recipients' => []]);?>123456789101112131415161718package com.sparkpost;import com.sparkpost.exception.SparkPostException;public class SparkPost {public static void main(String[] args) throws SparkPostException {String API_KEY = "<YOUR API KEY>";Client sparky = new Client(API_KEY);sparky.sendMessage("Oh hey!","Testing SparkPost - the world's most awesomest email service!","<p>Testing SparkPost - the world's most awesomest email service!</p>");}}123456789101112131415var transmission = new Transmission();transmission.Content.Subject = "Oh hey!";transmission.Content.Text = "Testing SparkPost - the world\'s most awesomest email service!";transmission.Content.Html = "<html><body><p>Testing SparkPost - the world\'s most awesomest email service!</p></body></html>";var recipient = new Recipient{};transmission.Recipients.Add(recipient);var client = new Client("<YOUR API KEY>");client.Transmissions.Send(transmission);// or client.Transmissions.Send(transmission).Wait();123456789101112131415161718192021222324252627282930package mainimport (sp "github.com/SparkPost/gosparkpost""log")func main() {var sparky sp.Clienterr := sparky.Init(&sp.Config{ApiKey: "<YOUR API KEY>"})if err != nil {log.Fatalf("SparkPost client init failed: %s\n", err)}tx := &sp.Transmission{Options: &sp.TxOptions{Sandbox: true},Content: sp.Content{HTML: "<p>Testing SparkPost - the world's most awesomest email service!</p>",Subject: "Oh hey!",},}id, _, err := sparky.Send(tx)if err != nil {log.Fatal(err)}log.Printf("Transmission sent with id [%s]\n", id)}123456789101112131415alias SparkPost.{Content, Transmission}defmodule MyApp dodef main(args) doTransmission.send(%Transmission{content: %Content.Inline{subject: "Oh hey!",html: "<p>Testing SparkPost - the world's most awesomest email service!</p>",},options: %Transmission.Options{sandbox: true}})endendCustomer Story: Zillow
Zillow treats email as a essential feature of their product. Find out how email drives user engagement with their app.
read more2018 Transactional Email Benchmark Report
We surveyed 1,800 businesses. Get the data-driven benchmarks that define the state of transactional email—and recommendations that will improve the effectiveness of your own messages.
read moreEmail Tools for Developers
These free tools from the email experts at SparkPost make it easy to build and check your app’s emails.
read moreSchedule a DemoBuild better apps with email
Discover how SparkPost helps product development teams build great apps with email. Speak with a product expert today to learn more.
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