Adapter pricing
Compare estimated monthly prices for 26 provider APIs from 1,000 to 1 million sends; SMTP costs depend on your service.
Compare the recurring public price of the 26 provider API adapters. SMTP is not listed because its cost depends on your own SMTP service. These are planning estimates, not provider quotes.
Pricing checked .
Shared assumptions. Monthly billing, pre-tax, at the exact requested volume, using the cheapest published self-service plan or overage path. Estimates exclude annual discounts, short trials, promotions, dedicated IPs, attachment or data charges, taxes, and negotiated contracts unless a row says otherwise.
27 of 27 adapters
| Provider | Pricing model | 1K | 50KSelected | 100K | 250K | 500K | 1M |
|---|---|---|---|---|---|---|---|
 PrimitiveSetup guide | Usage creditsOfficial source | $0 | $0 | $0 | $13 | Unavailable | Unavailable |
 AWS SESSetup guide | Usage-basedOfficial source | $0.10 | $5 | $10 | $25 | $50 | $100 |
 JetEmailSetup guide | Plan + overageOfficial source | $0 | $10 | $20 | $50 | $100 | $200 |
 ZeptoMailSetup guide | Prepaid creditsSource 1Source 2 | $2.50 | $12.50 | $25 | $62.50 | $125 | $250 |
 LettrSetup guide | Plan + volume tiersOfficial source | $0 | $15 | $30 | $250 | $250 | $450 |
| Plan + overageOfficial source | $19.95 | $19.95 | $34.95 | $166.95 | $386.95 | $733 | |
 MailtrapSetup guide | Fixed volume plansOfficial source | $0 | $20 | $30 | $200 | $300 | $750 |
 ResendSetup guide | Plan + overageOfficial source | $0 | $20 | $35 | $170 | $350 | $650 |
 SparkPostSetup guide | Volume plansOfficial source | $20 | $20 | $30 | $170 | $290 | $525 |
 UnosendSetup guide | Prepaid creditsOfficial source | $4 | $20 | $40 | $100 | $200 | $400 |
 Cloudflare Email SendingSetup guide | Usage + platform baseOfficial source | $5 | $21.45 | $38.95 | $91.45 | $178.95 | $353.95 |
| Platform fee + usageOfficial source | $5.35 | $22.50 | $40 | $92.50 | $180 | $355 | |
| Volume plansOfficial source | $7 | $35 | $68 | $162.50 | $325 | $600 | |
 MailgunSetup guide | Plans + overageOfficial source | $0 | $35 | $75 | $215 | $400 | $700 |
 LoopsSetup guide | Contact-based minimumSource 1Source 2 | $0 | $49 min. | $49 min. | $49 min. | $49 min. | $49 min. |
 SequenzySetup guide | Fixed volume tiersOfficial source | $0 | $49 | $99 | $199 | $399 | $799 |
| Base + usageOfficial source | $10 | $50 | $100 | $250 | $500 | $1,000 | |
| Usage-basedSource 1Source 2 | $0 | $50 | $100 | $250 | $500 | $1,000 | |
| Volume tiersOfficial source | $15 | $55 | $115 | $245 | $455 | $775 | |
 BrevoSetup guide | Volume plansOfficial source | $0 | $56 | $82 | $249 | $429 | $999 |
 Mailchimp TransactionalSetup guide | Required base plan + blocksOfficial source | $40 | $60 | $100 | $220 | $420 | $740 |
| Custom contractSource 1Source 2 | Custom | Custom | Custom | Custom | Custom | Custom | |
 LettermintSetup guide | Plan + overage · EUROfficial source | €10 | €40 | €85 | €175 | €270 | €500 |
| SMTPMicrosoft GraphSetup guide | Microsoft 365 licenseOfficial source | Varies | Varies | Varies | Varies | Varies | Varies |
 ScalewaySetup guide | Usage-based · EURSource 1Source 2 | €0.18 | €12.43 | €24.93 | €62.43 | €124.93 | €249.93 |
| Monthly plans · EUROfficial source | €19 | €19 | €49 | €99 | €179 | Custom | |
| SMTPSMTPSetup guide | Separately chosen serviceOfficial source | Varies | Varies | Varies | Varies | Varies | Varies |
Pricing notes, formulas, and constraints
Resend
Free includes 3K. Pro covers 50K and 100K; larger values use the cheaper available tier or published overage. Annual discounts are excluded.
Postmark
Free includes only 100. Published volume tiers cost less than a lower tier plus overage at these volumes.
SendGrid
The current free offer is a 60-day trial, so it is excluded. Intermediate values use published Essentials or Pro overage.
AWS SES
Uses switchable à -la-carte outbound pricing at $0.10 per 1K. Since July 21, 2026, new accounts default to Essentials at $0.16 per 1K but may switch. Attachments, transfer, dedicated IPs, global endpoints, add-ons, and the old 3K free tier, which is not generally recurring, are excluded.
Mailgun
The ongoing 100/day free allowance can cover 1K spread across a month. Higher cells use current Foundation or Scale published paths; temporary trials are excluded.
MailerSend
Free includes only 500. These are monthly Hobby or Starter prices; annual discounts are excluded.
Brevo
Verified in Brevo's monthly USD calculator. Free permits 300/day and supports transactional email. Paid cells use Starter at 50K/100K, Standard at 250K/500K, and Professional at 1M. Annual discounts are excluded.
Mailchimp Transactional
Includes the required minimum $20 Standard marketing plan for up to 500 contacts, plus 25K transactional blocks. Blocks 1–20 cost $20; blocks 21–40 cost $18. Temporary promotions are excluded.
SparkPost
SparkPost uses Bird's current pricing. The test plan is not production, so it is excluded.
Mailtrap
Free includes 4K with a 150/day cap. The 1M cell uses the cheapest public Enterprise plan that supports it: 1.5M at $750.
Cloudflare Email Sending
Requires Workers Paid at $5 per account each month. That includes 3K emails, then usage costs $0.35 per 1K.
Unosend
The minimum 10K pack is $4 and credits last 90 days. The one-time signup grant and negotiated business discounts are excluded.
Scaleway
Includes 300, then costs €0.25 per 1K of actual excess, rounded to cents and shown pre-tax. Quota increases above the default 10K require approval. Prices stay in EUR.
ZeptoMail
Uses ceil(volume ÷ 10K) credits at $2.50 each. Credits expire after six months; the one-time first credit is excluded.
MailPace
$10 includes the first 10K, then usage costs $1 per 1K. The trial covers only 100.
Iterable
There is no public dollar price. Contracts may cover both the stored-user high-water mark and sends, so send volume alone cannot determine the bill.
Loops
Free allows 4K sends and up to 1K subscribed contacts. Paid plans include unlimited transactional sends from $49, but the bill can be higher with more than 5K subscribed marketing contacts.
Sequenzy
Free includes 2.5K. Requested volumes use the next published tier: 60K, 120K, 300K, 600K, or 1.2M. There is no public overage price.
JetEmail
Free includes 3K. Pro costs $10 for 50K, then $0.20 per additional 1K.
Primitive
Developer usage credits cover through 215K; Power costs $13 and covers 250K. The published 10K/day account cap makes 500K and 1M unavailable in a calendar month.
Lettermint
Free includes only 300 per month. Requested volumes use the next Starter tier. Prices stay in EUR; no currency conversion is applied.
Lettr
Free includes 3K. Published tiers are 50K at $15, 100K at $30, 200K at $110, 500K at $250, and 1M at $450. The 250K column uses the 500K tier.
Plunk
Free covers exactly 1K. Once paid, all email usage costs $0.001 per email.
SMTP
The adapter is only the transport. Cost depends on the SMTP relay or server you choose, so showing $0 would be misleading.
Microsoft Graph
Included with Microsoft 365 and Azure AD licenses. Cost depends on your licensing agreement. Per-message rates do not apply; shown as varies because the license is separate from the SDK.
SendHeron
One allowance covers marketing and transactional mail. Starter is 50K for €19, Growth 150K for €49, Scale 250K for €99, and Max 500K for €179. No published plan covers 1M. There is no free plan, only a 7-day trial.
Helo
One plan: a $5 monthly platform fee plus $0.00035 per email, with no included volume, tiers, or commitments. There is no free plan; new accounts get 1,000 free test sends to their own verified domains.
Compare more than price
Price is only one part of the decision. Check Field support for message features, then review Delivery capabilities for scheduling, idempotency, and fanout behavior.