SendGrid

Email platform (by Twilio) for both transactional and marketing email.

Works with AI agents:llms.txtBuilt into Replit
Ask your AI about this, with this page as the source:ChatGPT ↗Claude ↗Perplexity ↗

SendGrid, owned by Twilio, sends application email through its Email API and SMTP service, and marketing email through Marketing Campaigns, all in one account.

You authenticate to the v3 REST API with an API key, using the official libraries for C#, Go, Java, Node.js, PHP, Python or Ruby, or send over SMTP with an X-SMTPAPI header carrying per-message instructions. Dynamic templates are stored in SendGrid and filled with your data at send time. Delivery events go to your app through the Event Webhook. To receive mail, you point an MX record at mx.sendgrid.net, and Inbound Parse posts each parsed message and its attachments to a URL you choose.

Useful for a small team: an Email Activity Feed to trace each message's delivery, with search and CSV export; subusers to separate statistics and permissions, for example transactional and marketing mail (up to 15 on Pro and Premier); and, on Pro, dedicated IPs and single sign-on.

Several team features (subusers, SSO, dedicated IPs) start at the Pro plan, not the entry plan. Searchable activity history beyond the default window requires a paid add-on, which extends it to 30 days, and all Email Activity data is stored in the United States.

Where it fits

How SendGrid itself is built

8 tools, from its own code, website and Product Hunt page.

Who uses it

1,061 makers' products, each linked to the source that shows it, and 26 open-source projects that declare it in their code.

The maker says so 67Subprocessor list 12Seen on the website 1,032Declared in code 37How evidence is collected →
My AskAIDeflect support requests by 75% with an AI customer service agent. Add to your existing…

“Listed in their tool stack on Starter Story (email)”

Transactional EmailMaker says so +1 · source ↗
BricksAI tool that turns spreadsheets and other data into dashboards and reports, for people w…

“We use Sendgrid for all of our onboarding, transactional, and marketing emails.”

Transactional EmailMaker says so +1 · source ↗
SongstatsMobile-first Streaming Insights | Real-time Playlist Alerts | Track your Streams, Follow…

“Listed in their tool stack on Starter Story (trello firebase email)”

Transactional EmailMaker says so +1 · source ↗
Data FetcherConnect Airtable to any application with no-code using the Data Fetcher Airtable extensi…

“I send newsletters using Mailerlite and transactional emails using SendGrid ’s fantastic dynamic templates feature.”

Transactional EmailMaker says so +1 · source ↗
Hexact, Inc.Tap into the internet as your own data source with our web scraper and automate 100+ sal…

“Google Cloud, Stripe , Chartmogul , Slack , Sendgrid , ClickUp and a ton more.”

Transactional EmailMaker says so +1 · source ↗
PlanyardSpreadsheets slowing you down? Planyard makes construction accounting easy—track budgets…

“Listed in their tool stack on Starter Story (platform trello email)”

Transactional EmailMaker says so +1 · source ↗
RestworldRestworld è la piattaforma del buon lavoro nell'ospitalità: trova staff o trova lavoro c…

“Listed in their tool stack on Starter Story (email)”

Transactional EmailMaker says so +1 · source ↗
CognotaCognota gives talent and L&D leaders visibility into how their function operates, and th…

“Listed in their tool stack on Starter Story (trello email)”

Transactional EmailMaker says so +1 · source ↗
Swift AppOur sport facility management software is the easiest way to run a sports facility. Get…

“…eetings, and docs Slack and Loom for internal communication Tawk.to for customer chatbots Sendgrid for mass email comms Twitter, Facebook, and LinkedIn for social media What have been the…”

Transactional EmailMaker says so +1 · source ↗
UserGuidingCreate and optimize in-app experiences that turn new users into champions. Onboard, enga…

“Listed in their tool stack on Starter Story (trello email)”

Transactional EmailMaker says so +1 · source ↗
Wave ConnectCreate your digital business card in minutes — no app needed. CRM sync, analytics, and A…

“Sendgrid : Email delivery, email tracking, marketing automation.”

Transactional EmailMaker says so +1 · source ↗
ASOASO.dev All in-one solution for iOS developers & marketing

“SendGrid ensures your emails land in the inbox, every time.”

Transactional EmailMaker says so +1 · source ↗
AssemblyEmployee recognition platform to celebrate milestones, reward contributions, and empower…

“Listed in their tool stack on Starter Story (email)”

Transactional EmailMaker says so +1 · source ↗
ADYOUNEED

“Now for the tools, here on ADYOUNEED we use ClickUp pretty much for all the task management and sprints, Stripe for payment, Segment for tracking, and Sendgrid for emails.”

Transactional EmailMaker says so +1 · source ↗

Open source: a project that declares SendGrid as a dependency in its public code — verifiable, but not necessarily a live product.

What makers say

34 makers on why they use SendGrid, in their own words on Product Hunt.

Previously used a different service, but started having problems with landing in spam boxes. Moved to Sendgrid and it's inbox deliverability rate has been amazing. Little bit more expensive, but for important emails, the cost is worth it.
RosperSep 2026 ↗
…ure: Amazon Web Services (AWS) , Google Analytics , Qovery , and MongoDB Email Marketing: Sendgrid Social Media: Buffer for automation and Canva for design Freelancer tools: Fiverr Interna…
FinvaultOct 2022 ↗
…eetings, and docs Slack and Loom for internal communication Tawk.to for customer chatbots Sendgrid for mass email comms Twitter, Facebook, and LinkedIn for social media What have been the…
Swift AppSep 2022 ↗
…downside is that it’s much harder to implement than you might think! We’ve since moved to Sendgrid for delivery, which takes a lot of pain out of the process but it is expensive.…
Scirra LtdSep 2021 ↗
Now for the tools, here on ADYOUNEED we use ClickUp pretty much for all the task management and sprints, Stripe for payment, Segment for tracking, and Sendgrid for emails.
ADYOUNEEDOct 2021 ↗

Loved and watch-outs

Themes that recur in makers' words and Hacker News comments, each linked to what it summarises, with how Product Hunt tags its reviews.

Most loved
  • Client libraries for JavaScript and Python are easy to use, and the docs are clear. PHPH 2
  • One service covers onboarding, transactional and bulk marketing email at scale. PHPH 2Starter Story
  • It can act as a plain SMTP smarthost behind Postfix, with no API work needed. HNHN 2
Watch-outs
  • Deliverability is poor, and its internal reputation score can look great while Gmail and Microsoft reputation tanks. HNHN 2HN 3HN 4
  • Since the Twilio acquisition the free plan was retired and the product feels neglected. HNHN 2HN 3
  • Its network carries a lot of spam, and phishing emails that pose as SendGrid are common. HNHN 2HN 3HN 4
  • Accounts can be terminated or blacklisted with little explanation. HNHN 2
On Product Hunt 4.7★ · 21 reviews
easy integration 3scalability 3transactional emails 3free tier 2marketing emails 2
Read the reviews on Product Hunt ↗

Reliability and open issues

Incidents on its status page50+ in the last 90 days · 50+ in the last yearFrom its own status page, 2026-10-02. Vendors decide what they post; one page can cover several products.

Who switches

Public pull requests on GitHub since Oct 2024 whose title says "X to Y" — real code changes moving a project from one tool to another, by developers in general. Open a row to see the pull requests.

Resend → SendGrid17 PRs
Amazon SES → SendGrid4 PRs
Mailgun → SendGrid3 PRs
SendGrid → Resend60 PRs
SendGrid → Amazon SES12 PRs
SendGrid → Mailgun11 PRs
SendGrid → Postmark6 PRs

Alternatives to SendGrid

All alternatives by situation →

Questions makers ask about SendGrid

Which languages have official SDKs?

SendGrid maintains libraries for C#, Go, Java, Node.js, PHP, Python and Ruby, plus helpers for building SMTP API headers. source ↗

Can SendGrid receive and parse incoming email?

Yes. With Inbound Parse you point an MX record for a dedicated hostname at mx.sendgrid.net, and SendGrid posts each message's contents and attachments to your URL. source ↗

Can I keep transactional and marketing sending separate?

Yes, with subusers, each with its own permissions, credit limits and statistics. They need a Pro or Premier API plan or an Advanced Marketing Campaigns plan, with up to 15 per account. source ↗

How far back can I look up what happened to an email?

The Email Activity Feed shows recent events per message. The Email Activity history add-on extends this to 30 days and API access, and the data is stored in the US. source ↗

Which plan do I need for SSO or dedicated IPs?

Pro, which adds dedicated IPs, subuser management, single sign-on and email testing on top of the Essentials plan. source ↗

Can I use my own templating instead of SendGrid's?

Yes. Dynamic templates are optional, and if you render email yourself you can still insert per-recipient data with substitution tags. source ↗

Is SendGrid free?

No permanent free tier; paid use starts at $19.95/mo. source ↗

Is SendGrid open source or self-hostable?

Not open source, and hosted only.

Can AI coding agents work with SendGrid?

It serves an llms.txt docs index; Replit set it up natively.

Who uses SendGrid?

1061 makers' products we track, each with a source, and 26 open-source projects declare it in their code. source ↗