Plunk vs Twilio SendGrid (2026): which should you pick?
As of Nov 13, 2026, Plunk and Twilio SendGrid share a 2.6 GPA, and only Plunk has a free plan.
Checked Oct 18, 2026 and Nov 13, 2026 · graded Oct 18, 2026 and Nov 13, 2026 by ToolGPA
They get the same grade on all five counts.
Price, platforms and features side by side. The table says where each price was read and when.
Plunk
Open-source email platform for transactional and marketing mail
Free plan · from $0.001
Twilio SendGrid
Twilio's email API and SMTP service, priced by monthly email volume
Free trial · from $19.95/mo
Which one is for you
Pick Plunk if
- Fits if you send a few thousand emails a month and want pay-as-you-go
- Works for developers who might self-host it later
Look elsewhere if
- Tight if you send more than 1,000 emails a month on the free plan, which also adds Plunk branding
- Pricey if your volume grows, since it is a flat $0.001 on every email
- Watch out: self-hosting under AGPL-3.0 carries that licence's obligations
- Watch out: the hosted service runs in the EU
Pick Twilio SendGrid if
- Fits if you already use Twilio for texts or calls and want email from the same company
- Works for apps sending about 50,000 emails a month that want address checks, with 2,500 validations on Pro
Look elsewhere if
- Tight if you stay on Essentials, with 1 teammate and 3 days of email activity
- Skip it if you want a free plan that lasts, since the trial ends after 60 days
- Pricey if you need SSO, subusers or a dedicated IP, which start with Pro at $89.95 a month
- Watch out: sending past your plan's volume can add overage charges the pricing page doesn't list
- Not for you if you want newsletters on the same plan, as Marketing Campaigns is separate, from $15 a month
How we grade them
| 2.6GPAPlunkGood | 2.6GPATwilio SendGridGood | |
|---|---|---|
| Value for money | BNo monthly fee; $0.001 per email, so 10,000 emails cost $10, near the cheapest quarter of $9 for sending tools. Cost grows with volume. | BGraded on 50,000 emails a month: Essentials is $19.95 for exactly that, in the lowest-priced quarter of this category at that volume. It comes with 1 teammate and 3 days of activity, and Pro at $89.95 is where dedicated IPs and SSO start. |
| Free plan and trial | CFree for 1,000 emails a month with unlimited contacts and every feature, but emails carry Plunk branding. | 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 | BTransactional email, campaigns, workflows, segments and inbound email. The listing shows no gap in the core job. | BAPI and SMTP, event webhooks, an inbound parse webhook, dynamic templates, domain authentication, address validation and EU data residency. That covers the job. Testing credits, subusers and dedicated IPs wait for Pro. |
| Ease of use | CNo store rating on record. It is built for developers and can be self-hosted under AGPL-3.0. | 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 Amazon SES and Docker listed. No apps, and the hosted service is in the EU. | 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 | open-source email sending at $0.001 an email | 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: Plunk and Twilio SendGrid. How we grade
Where they differ
- Plunk is open source and self-hostable, according to its own site.
- Plunk also covers workflow automation and email campaigns.
- Twilio SendGrid also covers email verification.
In commonWebPublic APITransactional email
At a glance
| Plunk | Twilio SendGrid | |
|---|---|---|
| Pricing | Free plan | Free trial |
| Starts at | $0.001 per email sent | $19.95 per month for 50,000 emails |
| Free plan | 1,000 emails per month with unlimited contacts and every feature, with Plunk branding on emails. | None |
| Free trial | None listed | 60-day free trial with 100 emails a day, no credit card required |
| Web | ||
| Made by | Plunk | Twilio Inc. |
| Price read from | useplunk.com | twilio.com |
| Checked | Nov 13, 2026 | Oct 18, 2026 |
Worth knowing
Plunk
- The free plan stops at 1,000 emails a month and puts Plunk branding on emails.
- The paid plan has no monthly fee: it is $0.001 per email, so cost scales directly with volume.
- The hosted service is in the EU; self-hosting under AGPL-3.0 carries that license's obligations.
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
Plunk
- Transactional email
- Send single emails through a REST API or an SMTP relay, from your own domain with DKIM signing.
- Campaigns and newsletters
- Broadcasts go to the whole contact list or to a segment, with a visual and an HTML editor and open and click tracking.
- Workflows
- Event-triggered sequences with delays, conditions and webhook steps, started by something a contact does in your product.
- Segments
- Dynamic segments are queries that re-run each time they are used, so a campaign reaches the current audience.
- Inbound email
- Addresses at your domain can receive mail, and replies become contacts that can start workflows.
- Self-hosting
- The code is open source under AGPL-3.0 and can be deployed with Docker Compose on your own servers.
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
Plunk
Free forever$0
1,000 emails a month and unlimited contacts. Every feature is included, but emails carry Plunk branding.
Pay as you grow$0.001
per email sent, no monthly fee
Removes the Plunk branding and the 1,000-email cap, with a monthly spend cap you can set. The vendor's example shows 10,000 emails costing $10.
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.
Common questions
Which is cheaper, Plunk or Twilio SendGrid?
As of Nov 13, 2026, Plunk starts at $0.001 per email sent, and Twilio SendGrid starts at $19.95 per month for 50,000 emails.
Which has a free plan, Plunk or Twilio SendGrid?
As of Nov 13, 2026, only Plunk has a free plan. Twilio SendGrid does not, though it has a free trial.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.