--- title: "Best email APIs for Node.js in 2026" description: "Email APIs ranked for Node.js and TypeScript: the official SDK and its types, the API, the free plan, deliverability and the first paid step, from npm data." url: https://www.unitpost.com/best/email-apis-for-nodejs section: Roundups updated: 2026-11-02 --- # Best email APIs for Node.js in 2026 For Node.js and TypeScript apps, Unitpost ranks first on the balance of a typed SDK, a clean API and the largest free plan here. Resend and Mailgun ship the most mature SDKs, Postmark has the best deliverability record, and SendGrid's Node.js SDK hasn't had a release in over a year. > Updated 2026-11-02. We make Unitpost, and it is on this list. Every score has a reason and the weights are published below, so you can re-rank it for your own needs. ## At a glance | # | Product | Best for | Free plan | Score | | --- | --- | --- | --- | --- | | 1 | Unitpost | app teams sending both kinds of email | 5,000 emails a month, 200 a day, no card | 4.4 | | 2 | Resend | developer-first transactional email | 3,000 emails a month, 100 a day | 4.2 | | 3 | Brevo | marketers who want a full suite | 300 emails a day | 3.9 | | 4 | Mailgun | high-volume senders and validation | 100 emails a day on one domain | 3.8 | | 5 | Postmark | mail that must reach the inbox | 100 emails a month | 3.6 | | 6 | MailerSend | a cheap first paid plan | 500 emails a month, card required | 3.6 | | 7 | Amazon SES | lowest cost at very high volume | None for SES; new AWS accounts get up to $200 in credits | 3.4 | | 8 | SendGrid | enterprises and multi-tenant platforms | None: a 60-day trial at 100 emails a day | 2.3 | ## The official packages - Unitpost: npm install unitpost - Resend: npm install resend - Mailgun: npm install mailgun.js - Postmark: npm install postmark - Brevo: npm install @getbrevo/brevo - MailerSend: npm install mailersend - Amazon SES: npm install @aws-sdk/client-sesv2 - SendGrid: npm install @sendgrid/mail ## 1. Unitpost Best for app teams sending both kinds of email. Transactional and marketing email on one API, one contact list and one bill, with a permanent free plan and an importer for six providers. Pros: - Permanent free plan, no card - One-key import from SendGrid, Resend, Mailgun, Postmark, Brevo and Loops - REST API, SMTP relay, MCP server and nine SDKs on every plan - Unlimited contacts on paid plans, priced by sends Cons: - A newer sender, without a long public track record - No sub-accounts, and dedicated IPs are not launched yet - SMS is on paid plans only Free plan: 5,000 emails a month, 200 a day, no card. Paid from: $10 a month for 20,000 emails. Priced by: emails sent. Website: https://www.unitpost.com ## 2. Resend Best for developer-first transactional email. A clean, modern email API from the team behind React Email, with inbound email and an official MCP server on every plan. Marketing contacts are billed on a separate plan. Pros: - A modern API with clear errors and many SDKs - Inbound email on every plan, free included - React Email for building templates in code Cons: - Marketing is a second plan, priced by contacts ($40 a month for 5,000) - Free sending is capped at 100 emails a day Free plan: 3,000 emails a month, 100 a day. Paid from: $20 a month for 50,000 emails. Priced by: sends and contacts. Website: https://resend.com ## 3. Brevo Best for marketers who want a full suite. A marketing suite with email, SMS, WhatsApp, a CRM and automation, plus a transactional API and SMTP relay. Its free plan sends the most email here. Pros: - The largest free volume: 300 emails a day - CRM, landing pages and automation built in - Paid plans sized by email volume, from $9 a month Cons: - SMS and WhatsApp credits are bought separately - A large step in price from Standard to Professional Free plan: 300 emails a day. Paid from: $9 a month for 5,000 emails. Priced by: emails sent. Website: https://www.brevo.com ## 4. Mailgun Best for high-volume senders and validation. A long-running email API with address validation and inbox placement testing. Strong at volume, with marketing campaigns left to other tools. Pros: - Email validation and inbox placement testing - EU region for data residency - Proven at very high volume Cons: - The free plan keeps logs for one day, on one domain - Marketing campaigns need another tool Free plan: 100 emails a day on one domain. Paid from: $15 a month for 10,000 emails. Priced by: emails sent. Website: https://www.mailgun.com ## 5. Postmark Best for mail that must reach the inbox. Transactional email known for fast, reliable inbox placement, with bulk mail kept on separate broadcast streams. It costs more, and the free plan is for testing. Pros: - The best-regarded deliverability record here - Transactional and bulk mail kept on separate streams - 45 days of message content and good debugging tools Cons: - The free plan is 100 emails a month - No audience or campaign tools, and no inbound on Basic Free plan: 100 emails a month. Paid from: $15 a month for 10,000 emails. Priced by: emails sent. Website: https://postmarkapp.com ## 6. MailerSend Best for a cheap first paid plan. A transactional email API with an official hosted MCP server and a $7 first paid plan. The free plan is small. Pros: - Hobby is $7 a month for 5,000 emails - API and SMTP on the free plan - An official hosted MCP server Cons: - 500 emails a month on free - No audience or campaign tools Free plan: 500 emails a month, card required. Paid from: $7 a month for 5,000 emails. Priced by: emails sent. Website: https://www.mailersend.com ## 7. Amazon SES Best for lowest cost at very high volume. Amazon's sending service, inside AWS: the lowest price per email here. You build the rest yourself, from bounce handling to templates and dashboards. Pros: - $0.10 per 1,000 emails on pay-as-you-go pricing - Runs inside your AWS account and IAM - Inbound email as well as sending Cons: - No campaign builder or audience tools - Bounce handling, dashboards and reputation work are yours Free plan: None for SES; new AWS accounts get up to $200 in credits. Paid from: $0.10 per 1,000 emails (new accounts start on a $0.16 plan). Priced by: emails sent. Website: https://aws.amazon.com/ses/ ## 8. SendGrid Best for enterprises and multi-tenant platforms. The long-running email API, now part of Twilio, with Marketing Campaigns as a separate product. Strong at scale; there is no free plan any more. Pros: - Proven at very high volume - Sub-accounts for multi-tenant platforms - Dedicated IPs from the Pro plan Cons: - No free plan: a 60-day trial, then from $19.95 a month - Marketing Campaigns is a separate product and plan Free plan: None: a 60-day trial at 100 emails a day. Paid from: $19.95 a month (Essentials). Priced by: sends and contacts. Website: https://www.twilio.com/en-us/sendgrid ## Scores | Product | Node.js SDK (30%) | Developer experience (20%) | Free plan (20%) | Deliverability (15%) | First paid step (15%) | Total | | --- | --- | --- | --- | --- | --- | --- | | Unitpost | 4 | 5 | 5 | 3 | 5 | 4.4 | | Resend | 5 | 5 | 4 | 3 | 3 | 4.2 | | Brevo | 4 | 3 | 5 | 3 | 4 | 3.9 | | Mailgun | 5 | 3 | 3 | 4 | 3 | 3.8 | | Postmark | 4 | 4 | 2 | 5 | 3 | 3.6 | | MailerSend | 4 | 4 | 2 | 3 | 5 | 3.6 | | Amazon SES | 4 | 3 | 2 | 3 | 5 | 3.4 | | SendGrid | 2 | 3 | 1 | 4 | 2 | 2.3 | ## How we scored This list is for developers sending email from Node.js or TypeScript: a Next.js route, an Express or Fastify server, a queue worker or a serverless function. The SDK weighs most: official, typed and released in the last year. - **Node.js SDK (30%).** An official Node.js SDK with TypeScript types, released in the last 12 months. - **Developer experience (20%).** A clear REST API, current SDKs, readable errors and docs. - **Free plan (20%).** A permanent free plan large enough to run a small app on, with no card. - **Deliverability (15%).** A long public record of inbox placement, and the tooling to protect it. - **First paid step (15%).** A cheap first paid plan that grows with sends. Each product gets 1 to 5 per criterion; the total is the weighted mean. ### Why Unitpost scored 4.4 - Node.js SDK: 4/5. The unitpost package (0.4, October 2026) ships TypeScript types for Node 18 and up; still before 1.0. - Developer experience: 5/5. Bearer-token REST API, nine SDKs, a CLI and an MCP server, with idempotency keys on sends. - Free plan: 5/5. 5,000 emails a month free for good, 200 a day, no card. - Deliverability: 3/5. Guided SPF, DKIM and DMARC with continuous checks, but a short public record so far. - First paid step: 5/5. $10 a month for 20,000 emails, priced by sends. Checked 2026-11-02 against https://www.unitpost.com/pricing, https://www.unitpost.com/sms, https://registry.npmjs.org/unitpost. ### Why Resend scored 4.2 - Node.js SDK: 5/5. The resend package, released October 2026, with TypeScript types. - Developer experience: 5/5. The API many newer providers copy, with SDKs across most languages. - Free plan: 4/5. 3,000 emails a month free, capped at 100 a day. - Deliverability: 3/5. A shorter public record than SendGrid or Postmark. - First paid step: 3/5. Pro is $20 a month for 50,000 emails; marketing contacts are a second plan. Checked 2026-11-02 against https://resend.com/pricing, https://resend.com/migrate, https://resend.com/docs/dashboard/receiving/introduction, https://github.com/resend/mcp-send-email, https://resend.com/docs/send-with-smtp, https://resend.com/docs/api-reference/api-keys/create-api-key, https://registry.npmjs.org/resend, https://resend.com/docs/dashboard/webhooks/retries-and-replays. ### Why Brevo scored 3.9 - Node.js SDK: 4/5. @getbrevo/brevo, released October 2026, TypeScript-first. - Developer experience: 3/5. A full API and SMTP relay, shaped by the marketing suite rather than built for developers first. - Free plan: 5/5. 300 emails a day, about 9,000 a month, on a permanent free plan. - Deliverability: 3/5. An established sender, without Postmark's public time-to-inbox record. - First paid step: 4/5. Starter from $9 a month, sized by email volume. Checked 2026-11-02 against https://www.brevo.com/pricing/, https://developers.brevo.com/docs/mcp-protocol, https://help.brevo.com/hc/en-us/articles/7959631848850, https://help.brevo.com/hc/en-us/articles/360021533839, https://registry.npmjs.org/@getbrevo/brevo. ### Why Mailgun scored 3.8 - Node.js SDK: 5/5. mailgun.js, released November 2026, with TypeScript types. - Developer experience: 3/5. A capable API on HTTP Basic auth, with a surface shaped by long history. - Free plan: 3/5. A free plan of 100 emails a day on one domain, with one day of logs. - Deliverability: 4/5. Validation, inbox placement tests and dedicated IPs. - First paid step: 3/5. Basic from $15 a month for 10,000 emails. Checked 2026-11-02 against https://www.mailgun.com/pricing/, https://www.mailgun.com/resources/guides/migrating-from-sendgrid-to-mailgun-email-api/, https://documentation.mailgun.com/docs/mailgun/mcp, https://documentation.mailgun.com/docs/mailgun/user-manual/sending-messages/send-smtp, https://registry.npmjs.org/mailgun.js, https://documentation.mailgun.com/docs/mailgun/user-manual/receive-forward-store/receive-http. ### Why Postmark scored 3.6 - Node.js SDK: 4/5. The postmark package, released July 2026, with TypeScript types. - Developer experience: 4/5. A mature, well-documented API with official libraries. - Free plan: 2/5. 100 emails a month free, enough to test, not to run an app. - Deliverability: 5/5. A long public record of time-to-inbox, protected by separate streams. - First paid step: 3/5. Basic is $15 a month for 10,000 emails. Checked 2026-11-02 against https://postmarkapp.com/pricing, https://postmarkapp.com/migration-guides, https://postmarkapp.com/lp/mcp, https://postmarkapp.com/developer/user-guide/send-email-with-smtp, https://registry.npmjs.org/postmark, https://postmarkapp.com/developer/webhooks/inbound-webhook. ### Why MailerSend scored 3.6 - Node.js SDK: 4/5. The mailersend package, released November 2026, with typings. - Developer experience: 4/5. A modern REST API, SMTP and an official MCP server. - Free plan: 2/5. 500 emails a month on one domain. - Deliverability: 3/5. An established sender, without a long public inbox-placement record. - First paid step: 5/5. Hobby is $7 a month for 5,000 emails. Checked 2026-11-02 against https://www.mailersend.com/pricing, https://developers.mailersend.com/mcp, https://www.mailersend.com/help/smtp-relay, https://www.mailersend.com/features/inbound-emails, https://developers.mailersend.com/api/v1/webhooks.html, https://registry.npmjs.org/mailersend, https://developers.mailersend.com/api/v1/inbound. ### Why Amazon SES scored 3.4 - Node.js SDK: 4/5. @aws-sdk/client-sesv2, released October 2026, typed; IAM setup comes with it. - Developer experience: 3/5. AWS SDKs and IAM: powerful, with more setup than an email API. - Free plan: 2/5. No SES free tier; new AWS accounts get up to $200 in credits. - Deliverability: 3/5. Good infrastructure, but reputation monitoring is your job. - First paid step: 5/5. Pay per email from $0.10 per 1,000, with no monthly minimum. Checked 2026-11-02 against https://aws.amazon.com/ses/pricing/, https://docs.aws.amazon.com/ses/latest/dg/smtp-connect.html, https://docs.aws.amazon.com/ses/latest/dg/smtp-credentials.html, https://docs.aws.amazon.com/ses/latest/dg/vdm-dashboard.html, https://registry.npmjs.org/@aws-sdk/client-sesv2, https://docs.aws.amazon.com/ses/latest/dg/receiving-email-notifications-contents.html. ### Why SendGrid scored 2.3 - Node.js SDK: 2/5. @sendgrid/mail's last release was September 2025, over a year ago; types ship in the package. - Developer experience: 3/5. A large API with SDKs, shaped by a decade of backwards compatibility. - Free plan: 1/5. No free plan: a 60-day trial at 100 emails a day, then from $19.95 a month. - Deliverability: 4/5. A long track record, with dedicated IPs from the Pro plan. - First paid step: 2/5. Plans start at $19.95 a month (Essentials) once the 60-day trial ends. Checked 2026-11-02 against https://www.twilio.com/en-us/products/email-api/pricing, https://www.twilio.com/docs/sendgrid/for-developers/sending-email/integrating-with-the-smtp-api, https://www.twilio.com/docs/sendgrid/ui/analytics-and-reporting/email-activity-feed, https://registry.npmjs.org/@sendgrid/mail, https://www.twilio.com/docs/sendgrid/for-developers/parsing-email/inbound-email. ## FAQ ### Do I need an SDK to send email from Node.js? No. Every API on this list takes a JSON POST with fetch, and most also offer SMTP for Nodemailer. An SDK adds types, retries and webhook verification helpers, so it's worth it when it's maintained and typed. ### Which email SDK works in serverless and edge functions? SDKs built on fetch run in serverless functions; check the package's runtime notes before an edge runtime. A plain fetch to the REST API works everywhere, which is the fallback when an SDK pulls in Node-only modules. ## Related - [Best inbound email parsing services in 2026](https://www.unitpost.com/best/inbound-email-parsing): Inbound email parsing services ranked: the parsed message and its verdicts, how deliveries are signed and retried, and receiving on the free plan. - [Best email APIs for AI agents in 2026](https://www.unitpost.com/best/email-apis-for-ai-agents): Email APIs ranked for AI agents: official MCP servers, send safety, reading replies, agent-readable docs and the free plan. With the reasons for every score. - [Best newsletter tools for SaaS product updates in 2026](https://www.unitpost.com/best/newsletter-tools-for-saas): Newsletter tools ranked for SaaS teams emailing their own users: syncing with your app, pricing as signups grow, the editor, and transactional mail too.