The Best Email APIs in 2026
We researched Email APIs from official websites, including pricing pages, plan tables and product documentation, then ranked them on transactional delivery, value for money and verified features. Use this guide to compare developer-focused sending, inbound email and delivery-event tooling.
Our top picks
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Top ranked
Mailgun#1 of 329.7/10A mature email API with broad sending, inbound routing, tracking, and deliverability tools.
Free plan · 30-day trial
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Runner-up
Twilio SendGrid Email API#2 of 329.3/10A mature email API with broad developer features, but no ongoing free plan.
60-day trial
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Top-ranked free plan
Mailjet#3 of 329.1/10A broad email platform combining APIs, automation, campaigns, and collaboration.
Free plan · 30-day trial
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 32 tools, best first
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Best forDevelopers wanting a mature full email API
A mature email API with broad sending, inbound routing, tracking, and deliverability tools.
- Inbound email
- Dedicated IP option
- Email templates
Free plan · 30-day trial Our Mailgun verdict → Visit MailgunFor vendors Sponsor this spot · #1 · $149/mo →9.7/10★★★★★Visit Mailgun -
Best forEstablished teams needing broad API capabilities
A mature email API with broad developer features, but no ongoing free plan.
- Inbound email
- Dedicated IP option
- Email templates
9.3/10★★★★★Try Twilio SendGrid -
Best forMarketing teams needing email automation breadth
A broad email platform combining APIs, automation, campaigns, and collaboration.
Free plan · 30-day trial Our Mailjet verdict → Visit MailjetFor vendors Sponsor this spot · #3 · $79/mo →9.1/10★★★★★Visit Mailjet -
Best forEuropean teams needing authenticated email delivery
A developer-focused email API with free sending and a €80 Scale tier.
- Dedicated IP option
- SMTP relay
9.0/10★★★★☆Visit Scaleway -
Best forTransactional email teams prioritizing deliverability
A focused email API for transactional delivery, tracking, templates, and inbound processing.
- Inbound email
- Dedicated IP option
- Email templates
8.8/10★★★★☆Visit Postmark -
Best forOpen-source teams needing flexible email workflows
A flexible email API with workflows, inbound processing, and self-hosting.
- Inbound email
- Email templates
- SMTP relay
8.6/10★★★★☆Visit Plunk -
Best forEstablished teams needing API and SMTP breadth
A broad email API and SMTP service for teams with varied sending needs.
- Dedicated IP option
- SMTP relay
8.4/10★★★★☆Visit Netcore -
Best forAWS users sending high-volume email cheaply
A low-cost AWS email API for high-volume transactional and marketing sending.
- Inbound email
- Dedicated IP option
- Email templates
8.3/10★★★★☆Visit Amazon SES -
Best forTeams needing SMTP, API, and inbound parsing
A broad email API platform for teams that need sending, parsing, and event visibility.
- Inbound email
- Dedicated IP option
- Email templates
8.2/10★★★★☆Visit SocketLabs -
Best forMarketing teams needing campaigns and automation
A marketing-focused email platform with API, SMTP, automation, and campaign tools.
8.0/10★★★★☆Visit Elastic Email -
Best forHigh-volume senders on a low-cost plan
A low-cost email API with inbound routing, webhooks, templates and SMTP relay.
- Inbound email
- Dedicated IP option
- Email templates
7.9/10★★★★☆Visit Maileroo -
Best forTeams sending API-managed broadcast email
A flexible broadcast email API with visual editing, automation, and delivery analytics.
- Inbound email
- Dedicated IP option
- Email templates
7.8/10★★★★☆Visit Resend -
Best forTeams needing affordable transactional email
Affordable transactional email with API, SMTP, templates, scheduling, and event webhooks.
- Inbound email
- Dedicated IP option
- Email templates
7.6/10★★★★☆Visit Brevo -
Best forSMTP-focused delivery with AI templates
A focused SMTP and API sender with templates, tracking, validation, and routing.
- Dedicated IP option
- Email templates
- SMTP relay
7.6/10★★★★☆Visit turboSMTP -
Best forSelf-hosters sending high email volumes
A self-hostable email API with broad delivery controls and developer-focused infrastructure.
- SMTP relay
7.4/10★★★★☆Visit HYVOR -
Best forDevelopers wanting SDKs and integration breadth
A developer-focused email API with SDKs, SMTP, inbound mail, and detailed event webhooks.
- Inbound email
- Dedicated IP option
- Email templates
7.3/10★★★★☆Visit Mailtrap -
Best forTeams building agent-aware email workflows
A flexible email API for agent workflows, inbound mail, and threaded conversations.
- Inbound email
- Email templates
7.2/10★★★★☆Visit e2a -
Best forTeams needing API and SMTP with signed webhooks
A focused transactional email service for API, SMTP and signed event webhooks.
- Dedicated IP option
- Email templates
- SMTP relay
7.0/10★★★★☆Visit Sarv -
Best forOpen-source teams wanting a modern email stack
A flexible email stack for developers, with self-hosting and a Resend-compatible API.
- Inbound email
- Dedicated IP option
- Email templates
6.8/10★★★☆☆Visit OpenSend -
Best forSmall teams needing inexpensive full email delivery
Affordable transactional email with API, SMTP, inbound routing, and webhooks.
- Inbound email
- Dedicated IP option
- Email templates
6.8/10★★★☆☆Visit MailerSend -
Best forTeams needing multi-channel notification delivery
A broad notification API for teams coordinating delivery across multiple channels.
- Email templates
- SMTP relay
6.8/10★★★☆☆Visit Notify -
Best forSelf-hosters needing inbound mail infrastructure
A self-hosted email stack for inbound mail, APIs, webhooks, and SMTP relay delivery.
- Inbound email
- SMTP relay
6.6/10★★★☆☆Visit MailKite -
Best forOrganizations unifying mailbox provider APIs
A unified mailbox API for teams that need provider integrations, inbound events, and sending.
- Inbound email
- Email templates
- SMTP relay
6.4/10★★★☆☆Visit EmailEngine -
Best forTeams wanting flexible email workflow management
Flexible API, SMTP, inbound email, and workflow tools with prepaid, non-expiring credits.
- Inbound email
- Dedicated IP option
- Email templates
6.3/10★★★☆☆Visit Emailit -
Best forTeams prioritizing inbound email conversion
A strong fit for teams turning inbound email into application workflows.
- Inbound email
- Dedicated IP option
- Email templates
6.1/10★★★☆☆Visit CloudMailin -
Best forTeams needing reliable SMTP and API delivery
A mature outbound email service with SMTP, API sending, tracking, and webhooks.
- Dedicated IP option
- Email templates
- SMTP relay
5.9/10★★★☆☆Visit SMTP2GO -
Best forCost-conscious transactional email senders
Pay-as-you-go transactional email with APIs, SMTP relay, webhooks, and reporting.
- Dedicated IP option
- Email templates
- SMTP relay
5.8/10★★★☆☆Visit ZeptoMail -
Best forEstablished teams needing broad API capabilities
A mature email API with broad developer features, but no ongoing free plan.
- Inbound email
- Dedicated IP option
- Email templates
5.8/10★★★☆☆Try Twilio SendGrid -
Best forProduct teams sending event-triggered email through their own SMTP
An email platform for product teams that sends behavior, event and newsletter emails through your own SMTP provider, with an events and contacts API.
- Email templates
5.8/10★★★☆☆Visit Mailazy -
Best forTeams wanting visual templates and webhook triggers
A collaborative transactional email API with visual templates, workflows, and testing tools.
- Dedicated IP option
- Email templates
5.5/10★★★☆☆Visit Waypoint -
Best forSelf-hosters needing campaigns and templated email
A flexible open-source email stack for teams that want control over delivery infrastructure.
- Inbound email
- Email templates
- SMTP relay
5.2/10★★★☆☆Visit Posta -
Best forDevelopers wanting simple transactional delivery
A focused transactional email service with API, SMTP, inbound webhooks, and delivery tracking.
- Inbound email
- SMTP relay
5.0/10★★☆☆☆Visit MailPace
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Monthly send limit | Inbound email | Delivery event webhooks | SMTP relay | Score |
|---|---|---|---|---|---|---|---|---|
| 1 | Mailgun | Yes | 10000 /mo | Yes | Yes | Yes | 9.7 | |
| 2 | Twilio SendGrid Email API | No | $19.95/mo | Yes | Yes | Yes | 9.3 | |
| 3 | Mailjet | Yes | 8000 /mo | 9.1 | ||||
| 4 | Scaleway Transactional Email | No | 100000 /mo | No | Yes | Yes | 9.0 | |
| 5 | Postmark | Yes | $15/mo | 10000 /mo | Yes | Yes | Yes | 8.8 |
| 6 | Plunk | Yes | $0.001/unit usage-based | Yes | Yes | Yes | 8.6 | |
| 7 | Netcore Email API | Yes | Yes | Yes | 8.4 | |||
| 8 | Amazon SES | No | $0.10/unit usage-based | Yes | Yes | Yes | 8.3 | |
| 9 | SocketLabs | No | $39.95/mo | 40000 /mo | Yes | Yes | Yes | 8.2 |
| 10 | Elastic Email | Yes | $29/mo | 37500 /mo | 8.0 | |||
| 11 | Maileroo | Yes | Yes | Yes | Yes | 7.9 | ||
| 12 | Resend Broadcasts | Yes | $20/mo | 50000 /mo | Yes | Yes | Yes | 7.8 |
| 13 | Brevo Transactional Email | Yes | $9/mo | 5000 /mo | Yes | Yes | Yes | 7.6 |
| 14 | turboSMTP | No | €14.95/mo | 15000 /mo | No | Yes | Yes | 7.6 |
| 15 | Hyvor Relay | Yes | €30/mo | 300000 /mo | Yes | Yes | 7.4 | |
| 16 | Mailtrap Email Sending | Yes | $15/mo | 10000 /mo | Yes | Yes | Yes | 7.3 |
| 17 | e2a | Yes | $10/mo | 20000 /mo | Yes | Yes | 7.2 | |
| 18 | Sarv Transactional Email | Yes | Yes | 7.0 | ||||
| 19 | OpenSend | Yes | $10/mo | 15000 /mo | Yes | Yes | No | 6.8 |
| 20 | MailerSend | Yes | $7/mo | 5000 /mo | Yes | Yes | Yes | 6.8 |
| 21 | Notify | No | Yes | Yes | 6.8 | |||
| 22 | MailKite Server | Yes | Free | Yes | Yes | Yes | 6.6 | |
| 23 | EmailEngine | No | $1,450/yr | Yes | Yes | Yes | 6.4 | |
| 24 | Emailit | No | $20 one-time | Yes | Yes | Yes | 6.3 | |
| 25 | CloudMailin | Yes | $25/mo | 10000 /mo | Yes | Yes | Yes | 6.1 |
| 26 | SMTP2GO | Yes | $10/mo | 10000 /mo | No | Yes | Yes | 5.9 |
| 27 | ZeptoMail | No | $2.50/unit usage-based | Yes | Yes | 5.8 | ||
| 28 | Twilio SendGrid | No | $19.95/mo | 50000 /mo | Yes | Yes | Yes | 5.8 |
| 29 | Mailazy | Yes | $49/mo | 100000 /mo | Not published by the vendor (checked 27 Oct 2026) | Not published by the vendor (checked 27 Oct 2026) | No | 5.8 |
| 30 | Waypoint | Yes | $20/mo | 10000 /mo | Yes | 5.5 | ||
| 31 | Posta | Free | Yes | Yes | Yes | 5.2 | ||
| 32 | MailPace | Yes | Yes | Yes | 5.0 |
Head-to-head All 24 comparisons →
- Mailgun vs Twilio SendGrid Email API
- Mailgun vs Mailjet
- Mailgun vs Scaleway Transactional Email
- Mailgun vs Postmark
- Mailgun vs Netcore Email API
- Mailgun vs Amazon SES
- Twilio SendGrid Email API vs Mailjet
- Twilio SendGrid Email API vs Scaleway Transactional Email
- Twilio SendGrid Email API vs Postmark
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How we rank email APIs
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update