Nodemailer vs Smtp.dev (2026): which should you pick?
As of Nov 13, 2026, Nodemailer and Smtp.dev share a 2.6 GPA, both have a free plan, and Nodemailer has no paid plan to buy, against $7 a month for Smtp.dev.
Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
Nodemailer grades higher on value for money and the free plan. Smtp.dev grades higher on ease of use and platforms. They get the same grade on features.
Price, platforms and features side by side. The table says where each price was read and when.
Nodemailer
Free Node.js library for sending email over SMTP and other transports
Smtp.dev
Email testing sandbox with SMTP, IMAP and a REST API
Which one is for you
Pick Nodemailer if
- Fits if you write Node.js and want to send mail from your own code
- Works for apps that already have an SMTP server and need a way to talk to it
Look elsewhere if
- Skip it if you don't write code, since it's a library with no screen
- Too light for deliverability, tracking or analytics, none of which it includes
- Not for you if you're on an older Node.js: version 10 needs Node.js 20 or later
- Watch out: you supply the SMTP server or other transport yourself
Pick Smtp.dev if
- Fits if you test an app or test suite that sends email and want to read it back
- Works for CI pipelines that need a real inbox to check, with no real mail leaving
Look elsewhere if
- Skip it if you want to deliver real email: outbound only reaches accounts inside the sandbox
- Tight if you stay on Lite: 1 domain, 50 accounts and messages deleted after 7 days
- Tight if you need catch-all addresses, which start on Pro
- Watch out: messages are deleted at the end of the 7, 30 or 90 day window
- Watch out: the pricing page shows monthly prices only
How we grade them
| 2.6GPANodemailerGood | 2.6GPASmtp.devGood | |
|---|---|---|
| Value for money | AFree under the MIT-0 license, including for commercial use. Anyone can download it, so it earns the top mark. | BPro is $7 a month, inside the cheapest quarter of email sending tools, which start at $9. Max is $20. |
| Free plan and trial | AEverything is free with no limits, no account and no trial to run out. | BLite is free: 1 domain, 50 accounts and 7 days of messages, with SMTP, IMAP, POP3, API and email audit. One project could live on that. |
| Features | CSends over SMTP, Sendmail, SES or streams, with attachments, DKIM, OAuth2 and test accounts. It does that job fully, but it's a small job: no analytics, no deliverability tools. | CSMTP, IMAP, POP3 and REST API access, message inspection, own-domain receiving and a deliverability audit. It does the testing job fully, but it never sends real email. |
| Ease of use | DNo store rating on record. It's a code library, so you write the code and supply the transport. | CNo store rating on record. You point your app or test suite at it and set DNS records for your own domain. |
| Platforms and integrations | CA Node.js library only, with Amazon SES and Ethereal listed. No app, no dashboard. | BWeb with an API, plus CI use with GitHub Actions, Jenkins, GitLab CI, Playwright, Cypress and Nodemailer. |
| Best for | sending email from Node.js code | testing app email without sending to real inboxes |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Nodemailer and Smtp.dev. How we grade
Price against what you get
Nodemailer has no paid plan and scores 1.7 out of 4 on features, ease of use and platforms. Smtp.dev starts at $7 a month and scores 2.3.
Smtp.dev scores higher, and starts $7 a month higher: the question is whether the extra is worth that to you. Of the other email sending services on the chart, none scores higher than Nodemailer for less, and 3 score higher than Smtp.dev for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Nodemailer is open source, according to its own site.
- Nodemailer also covers transactional email.
- Smtp.dev also covers dMARC.
At a glance
| Nodemailer | Smtp.dev | |
|---|---|---|
| Pricing | Free | Free plan |
| Starts at | Free | $7 per month for Pro |
| Free plan | None | Lite plan: 1 domain, 50 accounts, messages kept 7 days, with SMTP, IMAP, POP3, API and email audit. |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Andris Reinman | SMTP Labs, Inc. |
| Price read from | nodemailer.com | smtp.dev |
| Checked | Nov 13, 2026 | Nov 13, 2026 |
Worth knowing
Nodemailer
- It is a library only: you supply the SMTP server or other transport, and it adds no deliverability tooling or analytics.
- Nodemailer 10 requires Node.js 20 or later; older Node.js versions stay on the 9.x line.
- The site says development is sustained by EmailEngine licenses, and the library itself is MIT-0 licensed.
Smtp.dev
- It is a testing sandbox: on every plan, outbound mail is delivered only to accounts inside the sandbox, not to real inboxes.
- Lite keeps messages for 7 days and allows 1 domain and 50 accounts; catch-all accounts need Pro or Max.
- Messages are deleted automatically at the end of the plan's retention window of 7, 30 or 90 days.
- The pricing page shows monthly prices only and does not mention annual billing.
Key features
Nodemailer
- Zero runtime dependencies
- Installs with npm install nodemailer and includes TypeScript definitions, with both ES module and CommonJS builds.
- Multiple transports
- Sends through SMTP, Sendmail, Amazon SES or streams, using a reusable transporter object.
- Messages and attachments
- Builds multipart messages from HTML and plain-text bodies, with attachments, embedded images and full Unicode support.
- Security options
- TLS and STARTTLS are handled automatically, and DKIM signing, OAuth2 authentication and proxy support are included.
- Test accounts
- Integrates with Ethereal, a fake SMTP service, to generate test accounts for local development.
Smtp.dev
- SMTP, IMAP and POP3 access
- Standard mail clients and libraries connect with ordinary settings, with no SDK to install.
- REST API
- Accounts, messages, domains and tokens can be managed over the API, which is limited to 4096 requests a minute per user.
- Message inspection
- Shows headers, the MIME tree and the raw RFC 5322 source of each message, plus an HTML preview.
- Own-domain receiving
- Pointing a domain's or subdomain's MX record at the sandbox lets it receive mail from any service.
- Deliverability audit
- Checks sender configuration, HTML structure, links and content patterns that spam filters flag, grouped by severity.
- CI use
- Works with any CI system that can send over SMTP, with guides for GitHub Actions, Jenkins and GitLab CI.
Plans
Nodemailer
Nodemailer$0
Free under the MIT-0 license, including commercial use, with no attribution required.
Smtp.dev
Lite$0
1 domain, 50 accounts and 7 days of message retention; plus-sign aliasing but no catch-all.
Pro$7
per month
5 domains, 25,000 accounts, 30 days of retention, and catch-all and aliasing.
Max$20
per month
Unlimited domains and accounts, 90 days of retention, and catch-all and aliasing.
Common questions
Which is cheaper, Nodemailer or Smtp.dev?
As of Nov 13, 2026, Nodemailer is cheaper to start with: it is free, against $7 a month for Smtp.dev. Nodemailer is free, and Smtp.dev starts at $7 per month for Pro.
Which has a free plan, Nodemailer or Smtp.dev?
As of Nov 13, 2026, both Nodemailer and Smtp.dev have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.