Postmark vs Twilio SendGrid
We give Postmark a 2.2 GPA and Twilio SendGrid a 2.6, out of 4.0. Twilio SendGrid grades higher on value for money. They get the same grade on the free plan, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Postmark
Transactional email API and SMTP, with broadcasts on a separate stream
Twilio SendGrid
Twilio's email API and SMTP service, priced by monthly email volume
How we grade them
| 2.2GPAPostmarkFair | 2.6GPATwilio SendGridGood | |
|---|---|---|
| Value for money | DGraded on 50,000 emails a month: $55 on Basic or $60.50 on Pro, billed monthly only. That's the dearest in this category at that volume, roughly twice the middle. Bootstrapped companies can ask for $75 of credit, which helps a bit. | BGraded on 50,000 emails a month: Essentials is $19.95 for exactly that, in the cheaper quarter of this category at that volume. It's thin for the money, with 1 teammate and 3 days of activity, and Pro at $89.95 is where dedicated IPs and SSO start. |
| Free plan and trial | CA free developer plan that never expires and needs no card, but it's 100 emails a month with no way to buy more. That's for testing an integration, not running an app. | CNo lasting free plan, but a 60-day trial with no card: 100 emails a day, enough to wire it into your app and test. After that you're paying. |
| Features | BAPI and SMTP with SDKs, separate streams for app and bulk email, inbound email turned into JSON, templates, 45 days of message history and DMARC reports as an add-on. It covers the whole job; inbound needs Pro. | BAPI and SMTP, event webhooks, an inbound parse webhook, dynamic templates, domain authentication, address validation and EU data residency. That covers the whole job. Testing credits, subusers and dedicated IPs wait for Pro. |
| Ease of use | CJudged on how fast a developer sends a first email: official SDKs, a sandbox mode, ready-made templates for resets and receipts, and migration guides. You'll still verify a domain first. No rating on record. | CJudged on how fast a developer sends a first email: client libraries, interactive API docs and a setup guide on every plan, but you'll authenticate a domain before mail goes out properly. No rating on record. |
| Platforms and integrations | BWeb, with an API and SMTP, plus Zapier, WordPress, Stripe, Slack, Supabase, Bubble, Netlify and Datadog. No desktop or phone app, so B is the top. | BWeb, with a REST API, client libraries, SMTP and webhooks, so anything that speaks SMTP can use it. The listing names no ready-made integrations, and there's no desktop or phone app, so B is the top. |
| Best for | app email kept apart from marketing sends | app email for teams already on Twilio |
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: Postmark and Twilio SendGrid. How we grade
Price against what you get
Postmark starts at $15 a month and scores 2.7 out of 4 on features, ease of use and platforms. Twilio SendGrid starts at $19.95 a month and scores 2.7.
They score the same, and Postmark starts $4.95 a month lower. Of the other email sending services on the chart, none scores higher than Postmark for less, and none scores higher than Twilio SendGrid 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
- Postmark starts at $15 per month for 10,000 emails. Twilio SendGrid starts at $19.95 per month for 50,000 emails.
- Postmark has a free plan. Twilio SendGrid does not, though it has a free trial.
- Postmark also covers dMARC.
- Twilio SendGrid also covers email verification.
At a glance
| Postmark | Twilio SendGrid | |
|---|---|---|
| Pricing | Free plan | Free trial |
| Starts at | $15 per month for 10,000 emails | $19.95 per month for 50,000 emails |
| Free plan | Free developer plan: 100 emails a month with no expiry and no overages, for testing an integration or a small side project. No credit card needed. | None |
| Free trial | None listed | 60-day free trial with 100 emails a day, no credit card required |
| Web | ||
| Made by | ActiveCampaign, LLC | Twilio Inc. |
| Price read from | postmarkapp.com | twilio.com |
| Checked | Oct 18, 2026 | Oct 18, 2026 |
Who each one suits
Postmark
- Software teams whose password resets and receipts must arrive fast
- Apps that need to receive and parse incoming email
- Bootstrapped founders, who can ask for $75 of credit
Twilio SendGrid
- Developers adding transactional email to an app
- Teams that also use Twilio for text messages or voice
- Growing senders who will need dedicated IPs and subusers
Worth knowing
Postmark
- There is no tier between the free 100 emails a month and the 10,000-email paid plans.
- Billing is monthly only; the FAQ says annual plans are not offered yet.
- Basic has no inbound email processing and caps users at 4 and sending domains at 5.
- Dedicated IPs start at $50 a month per IP, need Pro or higher and 300,000 emails a month or more.
Twilio SendGrid
- There is no lasting free plan: the free trial ends after 60 days and allows 100 emails a day.
- Essentials has a single teammate and keeps 3 days of email activity; dedicated IPs, subusers and SSO need Pro at $89.95 a month.
- Sending past the plan's volume can add overage charges, which the pricing page does not list.
- Email campaigns are a separate product, Marketing Campaigns, from $15 a month for 5,000 contacts and 15,000 emails.
Key features
Postmark
- Email API and SMTP
- Send through a REST API with official SDKs or through SMTP, with batch sending, a sandbox mode and migration guides from other providers.
- Message streams
- Transactional and bulk or broadcast email run on separate sending infrastructure, so marketing sends do not affect password resets and receipts.
- Inbound email processing
- Pro and Platform turn incoming email into a JSON object and post it to a webhook URL your app handles.
- Templates
- Responsive templates for welcome emails, password resets and receipts, with a template editor and import tool.
- Message history and analytics
- 45 days of full message content by default, adjustable from 7 to 365 days, with bounce details, open and link tracking and a stats API.
- DMARC monitoring
- DMARC Digests reports show authentication problems and who is sending with your domain, sold as an add-on from $14 a month per domain.
Twilio SendGrid
- Email API and SMTP relay
- Send through a REST API with client libraries or through SMTP, with interactive API docs and a setup guide on every plan.
- Deliverability tools
- SPF and DKIM domain authentication, link branding, reverse DNS and suppression management on every plan; Pro adds dedicated IPs, IP pools and automated IP warm-up.
- Webhooks and analytics
- Event webhooks report deliveries, opens, bounces and blocks, and an inbound parse webhook turns received email into data your app can read.
- Email address validation
- A validation API checks addresses before you send; Pro includes 2,500 free validations and Premier 5,000.
- Dynamic templates and testing
- A template editor on every plan, and from Pro, 60 email testing credits a month for previews before sending.
- Security and compliance
- Two-factor sign-in, TLS encryption, IP access management, SOC 2 Type II and an EU data residency option, with single sign-on from Pro.
Plans
Postmark
Free$0
100 emails a month, never expires; extra emails cannot be bought on this plan.
Basic$15
per month for 10,000 emails
5 sending domains, 4 users, 45 days of history, no inbound email. Extra emails $1.80 per 1,000; $55 a month at 50,000 emails.
Pro$16.50
per month for 10,000 emails
10 domains, 6 users, inbound email, retention up to 365 days. Extra emails $1.30 per 1,000; $60.50 a month at 50,000 emails.
Platform$18
per month for 10,000 emails
Unlimited domains, servers, streams and users, with inbound email. Extra emails $1.20 per 1,000; $66 a month at 50,000 emails.
High volumeCustom
Custom pricing for large senders, arranged through sales.
Twilio SendGrid
Essentials$19.95
per month for 50,000 emails
SMTP and API sending, analytics, 1 teammate, 2 event webhooks and 3 days of email activity. $34.95 a month at 100,000 emails.
Pro$89.95
per month for 100,000 emails
1 dedicated IP, subusers, SSO, 1,000 teammates, 2,500 email validations, testing credits and 7 days of activity. $249 a month at 300,000 emails.
PremierCustom
Custom volume, 5,000 email validations and expert email program management, sold through sales.
Ways to pay less
Postmark
- Startups
$75 credit for bootstrapped companies
Companies that have launched, are charging for their product and have taken no outside investment can ask support for $75 of account credit.
Twilio SendGrid
No public discounts listed.
