2027 buyer's guide
Best transactional email services for 2027: pricing compared
What 7 transactional email services charge at the volumes most product teams send: receipts, one-time codes, password resets and notifications. Each price is the cheapest plan that covers the volume, read from the provider's own pricing page and linked to it.
Disclosure: we make Sendfeather, so it is listed first. The numbers are the providers' own, with the date we read them — check each source before you buy.
Monthly price by volume
USD per month, billed monthly. Prices checked 2026-10-13 and 2026-10-14. The lowest price at each volume is marked.
| Provider | 10,000 / mo | 50,000 / mo | 100,000 / mo | Overage per 1,000 |
|---|---|---|---|---|
| Sendfeather | $7lowest | $15lowest | $29lowest | from $0.70 |
| SMTP2GO | $15 | $30 | $75 | from $0.85 |
| SendGrid | $19.9550,000 plan | $19.95 | $34.95 | not published |
| Brevo | $17 | $56 | $82 | not published |
| Mailgun | $15 | $35 | $90 | from $1.10 |
| Postmark | $15 | $55 | no plan | from $1.80 |
| Resend | $2050,000 plan | $20 | $35 | from $0.90 |
Free tiers
| Provider | Free emails / month | The catch |
|---|---|---|
| Sendfeather | 1,000 | free plan, no credit card, one hosted mailbox included |
| SMTP2GO | 1,000 | no credit card required |
| SendGrid | 3,000 | a 60-day trial of 100 emails a day, not a permanent free tier |
| Brevo | 9,000 | free forever: 300 emails a day, no credit card |
| Mailgun | 3,000 | free tier: 100 emails a day |
| Postmark | 100 | developer plan: 100 emails a month, never expires |
| Resend | 3,000 | free forever: 3,000 emails a month (100 a day), 3 domains |
One-on-one comparisons
Each page puts one provider next to Sendfeather, with the notes that matter before switching.
Questions people ask
What is the cheapest transactional email service in 2027?
Comparing the cheapest published plan that covers each volume, monthly in USD — At 10,000 emails a month: Sendfeather $7, SMTP2GO $15, Mailgun $15, Postmark $15, Brevo $17, SendGrid $19.95, Resend $20. At 50,000 emails a month: Sendfeather $15, SendGrid $19.95, Resend $20, SMTP2GO $30, Mailgun $35, Postmark $55, Brevo $56. At 100,000 emails a month: Sendfeather $29, SendGrid $34.95, Resend $35, SMTP2GO $75, Brevo $82, Mailgun $90.
Which transactional email services have a free plan?
By monthly free volume: Brevo — 9,000 a month (free forever: 300 emails a day, no credit card); SendGrid — 3,000 a month (a 60-day trial of 100 emails a day, not a permanent free tier); Mailgun — 3,000 a month (free tier: 100 emails a day); Resend — 3,000 a month (free forever: 3,000 emails a month (100 a day), 3 domains); Sendfeather — 1,000 a month (free plan, no credit card, one hosted mailbox included); SMTP2GO — 1,000 a month (no credit card required); Postmark — 100 a month (developer plan: 100 emails a month, never expires).
Which providers bill overage instead of stopping your sending?
Published per-1,000 overage rates: Sendfeather (from $0.70 per 1,000), SMTP2GO (from $0.85 per 1,000), Mailgun (from $1.10 per 1,000), Postmark (from $1.80 per 1,000), Resend (from $0.90 per 1,000). SendGrid and Brevo publish no per-1,000 overage rate — you move up a plan or buy credits instead.
How current are these prices?
Every competitor price was read from that provider's own public pricing page on 2026-10-13 or 2026-10-14, and each row links to its source. Sendfeather's prices come from the same configuration its checkout charges. Check the source before you buy — providers change pricing without notice.
Try Sendfeather free
No card. Bring a domain, publish two DNS records, and send over SMTP or one API call — every message gets a delivery timeline.
Start freeAll product names are trademarks of their respective owners; this comparison is published for information only. SMTP2GO pricing · SendGrid pricing · Brevo pricing · Mailgun pricing · Postmark pricing · Resend pricing