The transactional email service market reached $5.7 billion in 2024 and is projected to hit $16.5 billion by 2033, growing at 12.5 percent a year. SendGrid still owns a large share of that market. It also gives teams more reasons to leave than ever. Twilio retired the SendGrid free plan in March 2025 and replaced it with a 60-day trial. Paid plans now start at $19.95 per month after a roughly 10 percent price rise across most tiers.
We tested and priced 7 SendGrid alternatives for this guide. Each one sends transactional email through an API or SMTP relay, and several include a permanent free tier. The list fits any team, from solo developers shipping a side project to platforms sending millions of receipts and password resets. It pairs well with our guide to the best AI marketing tools if you also run campaigns.
The best SendGrid alternative for most developers is Resend, with a free 3,000-email monthly tier and a $20 Pro plan. Postmark wins on deliverability, Amazon SES wins on price at $0.10 per 1,000 emails, and Brevo is the best free option.
Table of Contents
Quick Comparison: Top 7 SendGrid Alternatives
| Tool | Best For | Starting Price | Free Tier |
|---|---|---|---|
| Resend | Modern developer teams | $20/mo for 50,000 emails | 3,000 emails/mo |
| Postmark | Deliverability-first sending | $15/mo for 10,000 emails | 100 emails/mo sandbox |
| Amazon SES | High volume on a budget | $0.10 per 1,000 emails | 3,000/mo free year one |
| Mailgun | Routing and validation APIs | $15/mo for 10,000 emails | 100 emails/day |
| Brevo | Best free option | $15/mo for 20,000 emails | 300 emails/day |
| Mailjet | Email marketing plus API | $17/mo for 15,000 emails | 6,000 emails/mo |
| MailerSend | Mixed dev and non-dev teams | $28/mo for 50,000 emails | 3,000 emails/mo |
Why Are Teams Leaving SendGrid?
Teams leave SendGrid for three reasons: the free plan is gone, prices rose about 10 percent in 2024, and support quality dropped after the Twilio acquisition. Every alternative in this guide fixes at least one of those problems, and most fix all three.
SendGrid earned its position. The API is documented well, and the platform scales to billions of emails. The economics changed, though. New accounts now get a 60-day trial with 100 emails per day, then must pay. The Essentials plan costs $19.95 per month and the Pro plan starts at $89.95 per month. Deliverability on shared IPs also draws frequent complaints, because free and low-tier senders share pools with spammers.
Competitors saw the opening. Developer-first services like Resend and Postmark sell better documentation and cleaner IP pools. Budget platforms like Brevo and Mailjet keep permanent free tiers. Amazon SES undercuts everyone on raw price. Your best pick depends on volume, technical skill, and whether you also send marketing campaigns through tools like the best AI email marketing software.
Best SendGrid Alternatives for Developers
These two services put developer experience and deliverability first. Both publish clear pricing and maintain strict IP reputation policies.
1 Resend: Best for modern developer teams
Resend is the fastest-growing SendGrid alternative for product teams shipping in React, Next.js, and Node.
What it does well. Resend treats email as code. The React Email library lets you build templates as components, version them in Git, and preview them locally. The dashboard shows every event on a clean timeline. Setup takes minutes: verify a domain, grab an API key, and send. SDKs cover Node, Python, PHP, Ruby, Go, Rust, and Java.
Key features:
- React Email templates with local previews
- Webhooks for delivery, opens, clicks, and bounces
- Domain warm-up and managed dedicated IPs
- Batch sending and scheduled sends
- SMTP relay for legacy apps
Pricing. The free plan includes 3,000 emails per month with a 100-email daily cap. The Pro plan costs $20 per month for 50,000 emails. Scale starts at $90 per month for 100,000 emails with dedicated IP options.
Best for: startups and product teams that want SendGrid's API power with modern tooling and a real free tier.
Limitations. Resend is younger than the other tools here, and its marketing email features (Broadcasts) are basic compared to full campaign platforms.
2 Postmark: Best for deliverability-first transactional email
Postmark, owned by ActiveCampaign, is the service teams pick when password resets must arrive in seconds.
What it does well. Postmark separates transactional and broadcast traffic onto different IP pools, so newsletters never drag down your receipts. The company publishes live delivery-speed data for major inbox providers, and independent tests consistently place it at or near the top for inbox placement. Support answers fast, from humans.
Key features:
- Separate transactional and broadcast message streams
- Published time-to-inbox metrics
- 45 days of full content history on every plan
- Prebuilt templates for receipts and resets
- Webhooks, SMTP, and a clean REST API
Pricing. Plans start at $15 per month for 10,000 emails, with additional emails at $1.80 per 1,000. A free developer sandbox covers 100 test emails per month.
Best for: SaaS products where transactional delivery speed matters more than saving a few dollars.
Limitations. Postmark costs more per email than SES or Mailgun at volume, and it deliberately blocks cold outreach and purchased lists.
Best SendGrid Alternatives for High Volume
Past a few hundred thousand emails per month, unit economics decide the winner. These two services scale cheapest.
3 Amazon SES: Best for high volume on a budget
Amazon Simple Email Service is the cheapest way to send email at scale, full stop.
What it does well. SES charges $0.10 per 1,000 emails, roughly 30 times cheaper than SendGrid at comparable volumes. A million emails costs $100. It runs on the same infrastructure that sends Amazon's own order confirmations, so capacity is never a concern. Applications hosted on EC2 get 3,000 free emails per month in year one.
Key features:
- Pay-as-you-go pricing with no monthly minimum
- Dedicated IPs and managed IP warm-up
- Configuration sets for event tracking
- Virtual Deliverability Manager add-on
- Deep integration with AWS Lambda and SNS
Pricing. $0.10 per 1,000 outbound emails, plus $0.12 per GB of attachments. Dedicated IPs cost $24.95 per month each.
Best for: engineering teams already on AWS that send high volumes and can manage their own deliverability.
Limitations. SES is bare metal. There is no template gallery, weak analytics, and sandbox exit requires a support request. Budget engineering time for monitoring and bounce handling.
4 Mailgun: Best for developers who need routing and validation
Mailgun, part of Sinch, remains the closest like-for-like SendGrid replacement for API-driven sending.
What it does well. Mailgun handles both directions of email. Inbound routing parses incoming messages and posts them to your app as JSON, which powers reply-by-email features. Its email validation API cleans lists before you send. Send-time optimization and EU data residency round out a mature feature set.
Key features:
- Inbound email parsing and routing
- Email address validation API
- Send-time optimization on higher tiers
- EU region option for GDPR workloads
- Detailed logs with 5 to 30 days retention
Pricing. The Basic plan costs $15 per month for 10,000 emails, and Foundation costs $35 per month for 50,000. A dedicated IP is a $59 per month add-on. A limited free tier allows 100 emails per day.
Best for: apps that need two-way email, list hygiene, and predictable API behavior.
Limitations. Costs stack up: dedicated IPs, longer log retention, and EU residency all cost extra. Support on lower tiers is ticket-only.
Best Budget SendGrid Alternatives
These three platforms keep permanent free tiers and bundle marketing tools, so small teams can run everything in one place.
5 Brevo: Best free SendGrid alternative
Brevo (formerly Sendinblue) gives away more email than any serious competitor.
What it does well. The free plan sends 300 emails per day forever, with API and SMTP access included. Paid transactional plans start at $15 per month for 20,000 emails. Brevo also bundles a full marketing suite: campaigns, automation, SMS, and a CRM. Teams that outgrow the free tier often stay for the all-in-one platform. See how it stacks up against Mailchimp in our Mailchimp vs Brevo comparison.
Key features:
- 300 transactional emails per day free
- Shared marketing and transactional contact base
- Automation workflows and SMS on paid tiers
- Template editor plus API templates
- Built-in CRM at no extra cost
Pricing. Free at 300 emails per day. Transactional email plans start at $15 per month for 20,000 emails.
Best for: bootstrapped startups and small businesses that want free transactional email and room to grow into marketing.
Limitations. Deliverability on the shared free pool trails Postmark and Resend, and the daily cap makes spiky sending awkward.
6 Mailjet: Best for teams that want email marketing too
Mailjet, also owned by Sinch, splits the difference between an email API and a campaign platform.
What it does well. Mailjet's free plan covers 6,000 emails per month with a 200-per-day cap, and paid plans are among the cheapest per email in this guide. The drag-and-drop template builder supports real-time collaboration, which suits mixed teams where marketers own templates and developers own the API. EU-based infrastructure helps GDPR-sensitive companies.
Key features:
- Collaborative drag-and-drop template editor
- Shared template language between API and campaigns
- Subaccounts for agencies on higher tiers
- SMTP relay and REST API
- EU data hosting
Pricing. Free for 6,000 emails per month. Paid plans start at $17 per month for 15,000 emails.
Best for: small teams sending both receipts and newsletters who want one bill and one template system.
Limitations. Advanced features like send-time optimization and dedicated IPs sit behind Premium tiers, and analytics are lighter than Mailgun's.
7 MailerSend: Best for product teams with mixed skill sets
MailerSend comes from the MailerLite team and brings that same ease of use to transactional email.
What it does well. MailerSend pairs a clean API with no-code tools. Non-developers can edit templates, check analytics, and manage suppressions without touching code. Inbound routing, SMS, and email verification are built in. The interface is the friendliest in this roundup, which shortens onboarding for support and marketing staff.
Key features:
- Drag-and-drop and rich-text template editors
- Inbound email routing
- Email verification built in
- Multi-domain management with role permissions
- Transactional SMS from the same dashboard
Pricing. The free tier includes 3,000 emails per month. Paid plans start at $28 per month for 50,000 emails, with extra emails billed per 1,000.
Best for: product teams where marketers, support, and developers all touch email.
Limitations. The template editor lags behind Resend's React workflow for developer-heavy teams, and high-volume pricing beats Postmark but not SES.
How Should You Choose the Right SendGrid Alternative?
Match the tool to your monthly volume and team skills. Choose Resend or Postmark under 100,000 emails when deliverability matters, Amazon SES above 500,000 when cost matters, and Brevo or Mailjet when you need a permanent free tier with marketing tools.
Work through four questions before you migrate.
What is your real monthly volume? Price every shortlisted tool at your actual send count, including growth. SES wins big at volume: one million emails costs $100 on SES versus $89.95 plus overages on SendGrid Pro. At 10,000 emails, Postmark and Mailgun both cost $15 and the difference is features, not price.
Who maintains the integration? Engineering-led teams get the most from SES and Mailgun. Mixed teams do better with MailerSend, Brevo, or Mailjet, where non-developers can self-serve. Automating email flows alongside other systems? Our guide to the best Klaviyo alternatives covers ecommerce-focused platforms.
Do you send marketing email too? Brevo, Mailjet, and MailerSend bundle campaigns. Postmark deliberately separates streams. Running newsletters through a creator platform instead? See our ConvertKit alternatives guide.
How painful is migration? Every tool here supports SMTP, so a credentials swap gets you sending in minutes. API migrations take longer: budget a sprint to move templates, webhooks, and suppression lists, and warm up any new dedicated IP over two to four weeks.
How We Evaluated These Email Services
We compared 15 transactional email providers and kept 7. Each finalist was scored on five criteria: deliverability reputation and independent inbox-placement data, published pricing at 10,000 and 100,000 email volumes, API and documentation quality, free tier generosity, and analytics depth. We verified every price against the vendor's public pricing page in July 2026, and we favored services with transparent, published rates over quote-only pricing. Vendor performance claims are labeled as vendor claims unless independent data backs them.
The Bottom Line
SendGrid without a free plan is a harder sell than SendGrid in 2020. Resend is the best replacement for most developer teams, with a real free tier, modern tooling, and fair pricing at $20 per month. Pick Postmark when every receipt must land in seconds, Amazon SES when volume makes $0.10 per 1,000 irresistible, and Brevo when free matters most.
Migration is cheap. Every service here offers SMTP relay, so you can test an alternative this afternoon without rewriting code. Start with your suppression list and one low-risk email type, confirm inbox placement, then move the rest. For the campaign side of your stack, our roundup of the best AI email marketing software picks up where transactional sending ends.
Frequently Asked Questions
What is the best SendGrid alternative?
Resend is the best SendGrid alternative for most teams. It offers 3,000 free emails per month, a $20 Pro plan for 50,000 emails, and modern developer tooling. Postmark is the best pick when deliverability speed is the top priority.
Is there a free SendGrid alternative?
Yes. Brevo sends up to 300 emails per day free with API access, Mailjet includes 6,000 emails per month, and Resend and MailerSend each include 3,000 emails per month. SendGrid itself now offers only a 60-day trial.
What happened to the SendGrid free plan?
Twilio retired the permanent SendGrid free plan in March 2025. New accounts receive a 60-day trial with 100 emails per day, then must upgrade to Essentials at $19.95 per month or stop sending.
Is Amazon SES cheaper than SendGrid?
Yes, by a wide margin. Amazon SES charges $0.10 per 1,000 emails, so one million emails costs $100. SendGrid Pro starts at $89.95 per month for lower volume with overage charges. SES trades that saving for extra setup and monitoring work.
Can I use Brevo for transactional email?
Yes. Brevo includes transactional email through API and SMTP on every plan, including the free tier's 300 emails per day. Paid transactional plans start at $15 per month for 20,000 emails, and the platform also covers marketing campaigns, SMS, and a CRM.
David Austin is a technology writer and software analyst at DeployHyre, where he covers AI tools, SaaS platforms, cloud hosting, and business automation. He focuses on hands-on comparisons of pricing, features, and real-world performance so teams can pick the right software with confidence.