MailerSend
Modern transactional API with a clean UI.
MailerSend was built by the same team behind MailerLite, focused on transactional. Drag-and-drop templates plus a code-first API cover both designer and engineer flows. Pricing is competitive at small to mid volume.
At an early stage the deciding factors are what the free tier actually covers, what the first paid invoice looks like, and how much of a founding engineer's week the setup costs. Feature depth that only matters at a million sends a month is noise until it is not.
Against a waitlist, a launch announcement, onboarding email, and the first transactional sends, MailerSend covers developer experience, scheduling, SDK breadth, and webhook coverage, and does not cover operating track record. Whether that gap matters depends on how central those are to the build.
- Free tier: 500/mo permanent
- Best published rate per 1,000: Tiers not published in comparable form
- Starts at: $7/mo for 5,000 emails
- DX score: 8/10
- Deliverability: Good and steadily improving; reputation managed via dedicated IP options on paid plans.
- Operating since: 2020
- Scheduling: Yes
- SDKs: node, python, go, ruby, php
- Webhooks: Yes
Good and steadily improving; reputation managed via dedicated IP options on paid plans.
Teams that want both API and visual template editing.
- › Drag-and-drop templates plus API
- › Inbound routing supported
- › Sub-accounts for agencies
- › Smaller SDK footprint than SendGrid
- › Brand and ecosystem less recognized than older providers
Features at a glance
| API | Yes |
| SMTP | Yes |
| SDKs | node, python, go, ruby, php |
| Webhooks | Yes |
| Templates | rich |
| React Email | No |
| Batch send | Yes |
| Scheduled send | Yes |
| Suppressions | Yes |
| Multi-tenant | Yes |
| Inbound parsing | Yes |
| Event stream | Yes |
| Idempotency keys | No |
| Dedicated IP | Yes |
Appears in rankings
13 Best Transactional Email APIs (2026), Tested
Clean modern API and visual builder. Smaller ecosystem than the giants.
7 Best Email Tools for Developer Experience (2026), Tested
Modern API, clean dashboard, drag-and-drop plus code.
11 Best Email Tools With Permanent Free Tiers (2026), Tested
3,000/mo permanent.
10 Best Email Tools for Multi-Tenant SaaS (2026), Tested
Modern API and sub-account story for teams that want developer and client-facing surfaces together.
12 Best Mailchimp Alternatives (2026), Tested
Better Mandrill-style fit for teams that want transactional API plus visual templates.
7 Best Email Tools With Supabase Integration (2026), Tested
Straightforward API and templates make it practical from Edge Functions without a large platform commitment.
7 Best Email Tools With Stripe Integration (2026), Tested
Straightforward API and templates for billing events without a large platform commitment.