8 Best SendGrid Alternatives (2026) for Transactional and Marketing Email

SendGrid is Twilio’s email service: developers send app email such as password resets and receipts through its API, and marketers send newsletters from a separate campaigns product.

Teams evaluating or already running SendGrid look elsewhere when they need a free plan that lasts and faster app email, or when email has become one channel of several: the same event reaches users by push, SMS or an in-app feed, users choose what they receive, and engineers, product, growth and their agents change messages without a code release.

Quick guide: SendGrid alternatives by use case

If you need	Choose
A transactional email API with fast delivery and inbound processing?Postmark keeps app email and bulk email on separate streams; Mailgun adds inbound routing.	PostmarkMailgun
Email templates and workflows kept as code in your repo?Resend templates are React components; SuprSend and Knock push workflows and templates from a CLI.	ResendSuprSendKnock
The lowest price per email, inside your own AWS account?	ASAmazon SES
An in-app bell and feed next to your email?Both ship one. SuprSend's in-app inbox has a real-time feed, read state synced across devices, tabs, toasts and six client SDKs.	SuprSendKnock
Transactional and marketing messages in one platform?	SuprSendKnockBrevo
Digests, user preferences and fallback to a second provider, above the email provider you keep?	SuprSendKnock
Each of your customers needs its own branding, templates and sending domain?Knock puts per-customer branding on Enterprise.	SuprSendKnock
An agent that builds and debugs notifications, or your own agent connected over MCP?	SuprSendKnock
Product and growth changing messages without an engineer?	SuprSendCustomer.ioBrevo
Marketing campaigns run entirely from a UI?	BrevoCustomer.io
Open source to self-host for free, or a self-hosted install the vendor supports?None of the eight is open source. SuprSend runs in your VPC or on-prem on Enterprise.	SuprSend
Email is your only channel, and SendGrid already sends it well?See when to stay.	SendGrid

What SendGrid does

SendGrid, part of Twilio since 2019, is sold as two products on one account. The Email API accepts mail from your code over REST or SMTP and delivers it from SendGrid’s own mail servers, with Handlebars templates, domain authentication, suppression lists and an event webhook. Marketing Campaigns adds contacts, segments, a design editor, signup forms and automated email series, on its own plan.

SendGrid's site, announcing that SendGrid's email products are moving onto Twilio.com

LicenceProprietary, cloud only.

ChannelsEmail. Twilio sells SMS, WhatsApp and voice as separate products.

Backend SDKsC#, Go, Java, Node.js, PHP, Python and Ruby, plus an SMTP relay.

Frontend SDKsNone; sending is server-side.

ComplianceSOC 2 Type II, GDPR and an EU data residency option; not HIPAA eligible.

Billing unitEmails sent per month; Marketing Campaigns is billed on contacts.

Self-hostingNone.

G24.0 across 360 reviews.

Where SendGrid is strong

Deliverability tooling on its own mail servers: dedicated IPs with automated warm-up and deliverability insights on Pro.
Address validation before you send, and Inbound Parse, which posts incoming mail to your endpoint.
Official libraries in seven server languages and an SMTP relay for systems that cannot call an API.
Subusers that separate traffic and reputation for different brands or clients.
Signup forms and A/B tests of subject and content in Marketing Campaigns.

Plan	Price	Included	Notable limits
Free trial	$0 for 60 days	100 emails a day	Ends after 60 days
Essentials	From $19.95 a month	50,000 emails, then about $1.33 per 1,000	Shared IPs, 3 days of activity history, 1 teammate
Pro	From $89.95 a month	100,000 emails, a dedicated IP, 2,500 validations	7 days of activity history
Premier	Custom	Above 2.5 million emails	Sales contract
Marketing Campaigns	From $15 a month	5,000 contacts on Basic	Separate plan; automations on Advanced from $60

Why teams look for a SendGrid alternative

01They need a free plan that lasts past testing. Twilio retired SendGrid's permanent free plan in 2025. New accounts get a 60-day trial at 100 emails a day, then pay from $19.95 a month. Postmark keeps 100 emails a month free, Mailgun 100 a day and Resend 3,000 a month, and SuprSend's free plan covers 10,000 notifications a month across every channel.
02The product needs more channels than email. A failed payment usually needs an email, an in-app alert and sometimes an SMS. SendGrid covers the email. Twilio's SMS and WhatsApp are separate products with their own APIs, templates, logs and bills, so your code joins them up and decides which one fires.
03The logic around each email lives in application code. Delays, grouping ten comments into one digest, sending in the user's timezone, skipping users who opted out of a category and retrying on another provider are all yours to write and maintain. SendGrid's automations sit in Marketing Campaigns on the Advanced plan, start when a contact joins a list or segment, and send email only.
04Support needs more history than the plan keeps. Essentials keeps 3 days of searchable email activity and Pro keeps 7. A Monday ticket about a Thursday email is often past the window.
05Transactional and marketing email are two products. The Email API bills on emails sent and Marketing Campaigns bills on stored contacts, on separate plans. Unsubscribes have to be kept in sync across both.
06Engineers want notifications in the repo, and agents that can change them. SendGrid's dynamic templates are edited in the dashboard or through the API; its docs list no CLI to move them between environments. Twilio's MCP server, in public beta, searches SendGrid's docs and API reference. It does not send email or change the account.

How we compared these tools

We read each tool’s documentation, API reference, pricing page, trust or security page and G2 reviews, and drew on our 114-item line-by-line comparison of SuprSend and SendGrid.

What we compared on: feature depth, use cases covered, billing model, developer experience, AI authoring, and ease of use for technical and non-technical team members.

Three different kinds of product get called “SendGrid alternatives,” and they solve different problems.

Layer 1: Delivery providers

SendGrid, Postmark, Resend, Mailgun and Amazon SES take an email and get it into an inbox. They own IP reputation, domain authentication, bounces and complaints. Every product that sends email pays one of them, including the platforms in the next two layers. If deliverability or price per email is the whole problem, the answer is in this layer, and Postmark or Resend is where most teams start.

Layer 2: Unified notification platforms

SuprSend and Knock sit above the providers. They hold your users, their channels and preferences, and run workflows that decide what goes out, on which channel and when, then hand the email to SendGrid, Postmark, Resend or SES. Both cover transactional and marketing messages. Both can be run from outside the dashboard: each has an agent that builds workflows, an MCP server and a CLI.

Layer 3: Customer engagement platforms

Customer.io and Brevo run campaigns and journeys for marketing and growth teams. Their agents mostly draft messages and work on contacts and campaigns. A feed inside your product, and preferences your customers’ admins manage, are usually left to you.

The best SendGrid alternatives

Tool	Built around	Strongest at	Meant for	Billing unit	Free plan	Paid from	G2
SuprSend	A notification workflow engine that sends through your own providers	Workflows, preferences and fallback across nine channels; agent, MCP server and CLI	Engineering, product and growth	Notification per channel	10,000 notifications/mo	$100/mo for 50,000, then $2 per 1,000; Business $250/mo, then $5 per 1,000	4.8 (129 reviews)Ease of setup: 9.4
Postmark	A transactional email API with separate message streams	Delivery speed and 45 days of message history; MCP server sends and reads stats	Engineering	Emails sent	100 emails/mo	$15/mo for 10,000	4.6 (28 reviews)Ease of setup: 9.2
Resend	An email API with templates written as React components	Developer experience; MCP server covers sends, templates, contacts and broadcasts	Engineering	Emails sent; broadcasts by contact	3,000 emails/mo	$20/mo for 50,000	4.8 (9 reviews)Ease of setup: 9.0
Mailgun	An email API with inbound routing and address validation	Receiving and parsing email; MCP server with 50+ operations	Engineering	Emails sent	100 emails/day	$15/mo for 10,000	4.2 (320 reviews)Ease of setup: 8.6
Amazon SES	Pay-per-email sending inside AWS	Price at volume, under your own IAM policies	Engineering	Per 1,000 recipients	None for new accounts	$0.16 per 1,000	4.3 (203 reviews)Ease of setup: 8.1
Knock	A cloud workflow engine with in-product guides and an inbox	Workflow steps, guides; agents, MCP server and CLI	Engineering and product	Messages	10,000 messages/mo	$250/mo for 50,000	4.6 (148 reviews)Ease of setup: 8.7
Brevo	An email marketing suite with SMS, WhatsApp and a CRM	Low-cost campaigns; MCP server for contacts, campaigns and CRM	Marketing	Emails sent	300 emails/day	$9/mo for 5,000	4.5 (2,600+ reviews)Ease of setup: 8.9
Customer.io	A journey builder over customer profiles and events	Segments on event data; agent, MCP server and CLI	Marketing and growth	Profiles	None	$100/mo for 5,000 profiles	4.4 (953 reviews)Ease of setup: 7.9

1.SuprSend

Best for running transactional, product and engagement notifications from one platform, on top of the email provider you choose

SuprSend's architecture: your API calls, SDKs, CDPs and data warehouses feed workflows, preferences, templates and observability, which send through email, SMS, WhatsApp, push, Slack and Microsoft Teams providers and the in-app inbox

What SuprSend is. SuprSend is a US company, founded in 2022, that runs every notification a product sends from one platform, from transactional alerts to engagement campaigns. Engineering, product and growth teams work in it alongside their agents.

A complete orchestration engine

Retries and fallbackBring your own email, SMS and push providers, SendGrid included; if one does not confirm delivery, the next one sends. Essentials.

WorkflowsA workflow engine with branches, conditions, delays, throttling, data fetch and webhook steps, and sends in each user's timezone. One send step reaches the user's channels in your order. Built visually, through the CLI or by an agent, with version history and rollback. Builder on every plan; throttling, fetch, webhook and timezone from Essentials.

TemplatingEditors for every channel, variants by tenant, user or language, version history with rollback, and translation files. Every plan; translation files on Business.

User preferencesUsers opt in or out per category and channel, in a preference centre you embed or host. Business.

ObservabilityStep-by-step workflow logs and message logs with the provider's error, kept 30 days on Free and 90 on paid plans, with warehouse sync on Business.

In-app inboxReal-time bell and feed, read state synced across devices, tabs, toasts, per-tenant feeds and six client SDKs, embedded or headless. Every plan, Free included.

Batching and digestsCollect events over a window and send one digest, at a time the user picks. Business.

Per-tenant setupsEach of your customers gets its own branding, templates, preferences and provider routing. Business add-on and Enterprise.

DeploymentSuprSend cloud with 99.9% uptime, or your own VPC, on-prem or BYOC with vendor support. SOC 2 Type II, ISO 27001, GDPR, HIPAA and CPRA. Self-hosted and BYOC on Enterprise.

How your team operates it

In the dashboard

The SuprSend agent builds a workflow from a description, drafts the copy for each channel and traces why a send failed. Product and growth work here and in Slack.

In your own agent

Connect the MCP server to Claude, ChatGPT, Cursor or any MCP client and build and change workflows, templates and tenants, test and send, and read the delivery log and analytics from there.

In your IDE or codebase

The CLI pushes and pulls workflows, templates, schemas and translation files, promotes staging to production and generates TypeScript types, so a bulk change is one command reviewed in a pull request.

Pricing. Free up to 10,000 notifications a month. Essentials starts at $100 a month for 50,000, then $2 per 1,000. Business starts at $250 a month for 50,000, then $5 per 1,000. Enterprise is custom. Your email provider bills you separately for sending.

Verdict. Choose SuprSend when email has become one channel among several and you want workflows, preferences, fallback and logs in one place your whole team and its agents can change, while you keep the email provider you pay today; choose Postmark or Resend if email is the only channel you will send. For the head-to-head, see how SuprSend differs from SendGrid.

2.Postmark

Best for transactional email that has to arrive in seconds, from a provider that screens what its customers send

Postmark's homepage: the email delivery service people actually like, with customer quotes

Where it goes deep. Postmark has done one job since it launched: getting app email into the inbox quickly. Every account separates mail into message streams, one for transactional email and one for broadcasts, sent from different IP pools, so a burst of newsletter complaints does not slow down your password resets. Postmark vets new senders and refuses cold email and bought lists, which keeps its shared IPs clean for everyone on them.

The tooling is built for debugging. Message activity is kept for 45 days by default, and up to 365 on Pro and Platform, with the full content, the SMTP conversation and each open and click. Layout templates mean a footer change reaches every email. Inbound processing turns replies into JSON posted to your webhook on Pro and Platform. Bounce handling, suppression and DMARC monitoring are built in. Postmark has been part of ActiveCampaign since 2022 and runs as its own product; its official MCP server, marked experimental, sends plain or template email, lists templates and reads delivery statistics.

Where it stops. Postmark sends email. There is no SMS, push or in-app channel, no workflow engine and no user preference model, so delays, digests, channel choice and opt-outs stay in your code. The broadcast stream is for announcements to opted-in users; campaigns with segments and journeys need another tool. Overage of $1.20 to $1.80 per 1,000 costs more than SendGrid’s volume tiers above roughly 100,000 emails a month.

Pick it if your problem is transactional email deliverability and speed, and your team is happy keeping the logic around each email in code.

Verdict. Postmark is the closest like-for-like replacement for SendGrid's Email API, and the first one most teams try. Pair it with a notification platform when you need other channels or preferences.

3.Resend

Best for developers who want email templates written as React components

Resend's homepage: email for developers, for transactional and marketing email at scale

Where it goes deep. Resend launched in 2023 from the team behind React Email, so templates are components you write, test and review in your repo. Its official MCP server sends email and manages templates, contacts, broadcasts, automations and domains.

Where it stops. Resend is email only. Its automations run delays, conditions and email steps, with no SMS, push or in-app step, and marketing broadcasts bill by contacts, separately from transactional sends.

Pick it if your team writes TypeScript and React and wants email that feels like the rest of the codebase.

Verdict. Resend is the developer-experience answer to SendGrid, and its MCP server lets an agent run most of the account. It stays an email tool, so the logic across channels still needs a home.

4.Mailgun

Best for high-volume senders who also receive email and validate addresses

Mailgun's homepage: a transactional email delivery service and API, with a code sample and delivery-rate statistics

Where it goes deep. Mailgun, owned by Sinch since 2021, pairs sending with inbound routes that parse incoming email and post it to your app, which suits support inboxes and reply-by-email features. Address validation is part of the product. Its official MCP server runs locally and exposes 50+ API operations, from sending to domain and DNS checks and delivery stats.

Where it stops. The free plan and Basic keep one day of logs, and the dashboard is built for engineers. Channels beyond email, workflows and preferences are left to you.

Pick it if inbound parsing or address validation is part of the job.

Verdict. Mailgun is the SendGrid peer built most around receiving email as well as sending it. Budget for a higher plan if you need log history.

5.Amazon SES

Best for teams on AWS sending large volumes who will build their own tooling

The Amazon SES product page: send transactional, marketing and bulk email at scale from your applications

Where it goes deep. SES charges per email with no monthly fee on its Essentials plan, with lower rates above 10 million and 100 million emails a month. Accounts that were already sending before July 2026 keep the older rate. Email stays inside your AWS account and region, under your IAM policies, with a deliverability dashboard included.

Where it stops. Templates are basic, there is no visual editor, and bounces and complaints arrive as events you wire up yourself. The SES-specific free tier ended for new customers in July 2026.

Pick it if price per email matters more than tooling and your team already runs on AWS.

Verdict. SES is the lowest-cost way to send email at volume. Most teams put a notification platform or their own service in front of it.

6.Knock

Best for product teams that want workflows, an in-app inbox and in-product guides from one cloud platform

Knock's homepage, with its agent building an onboarding workflow: a trigger, welcome email, 24-hour delay, agent step and a branch for managers and ICs

Where it goes deep. Knock runs an event from your app through batch, delay, branch, throttle and fetch steps, then sends through your email, SMS, push, chat and WhatsApp providers. Workflows are managed as files through its CLI, guides add in-product banners and modals, and agents work from the dashboard, Slack and MCP clients.

Where it stops. Per-customer branding and preferences, translations, custom roles, SAML and warehouse sync are on Enterprise. Knock is cloud only.

Pick it if workflow depth and in-product guides decide the purchase, and your per-customer needs fit Enterprise.

Verdict. Knock is a strong platform to put in front of your email provider. Check which of your requirements sit on Enterprise before you commit.

7.Brevo

Best for small teams that want marketing email, transactional email, SMS and a CRM at a low monthly price

Brevo's homepage: an AI-powered customer platform for email, SMS and WhatsApp, with its campaign dashboard

Where it goes deep. Brevo started as Sendinblue, an email marketing tool, and added SMS, WhatsApp and a CRM. It prices by emails sent with unlimited contacts, and the free plan includes transactional email. Its official MCP server lets an agent manage contacts, lists, email, SMS and WhatsApp campaigns, templates and CRM deals.

Where it stops. Brevo is built for marketers working in its UI, and there is no in-app inbox for your product. Marketing automation and A/B tests start on the Standard plan.

Pick it if you want to replace SendGrid’s Email API and Marketing Campaigns with one inexpensive account.

Verdict. Brevo is the budget answer for teams whose email is mostly marketing. Product notifications need another tool.

8.Customer.io

Best for growth teams running journeys on product events

Customer.io's dashboard: a campaign goal report with conversions over time, attribution by message, and the agent panel

Where it goes deep. Customer.io began as an email tool and grew into a journey builder over people, objects and events, with segments marketers build themselves, across email, push, SMS and in-app. An in-product agent drafts messages, and an MCP server and CLI act under the signed-in user’s role, with writes held for approval where the client supports it.

Where it stops. There is no free plan, and billing counts stored profiles, so a large user base costs more even when you send little.

Pick it if marketing and growth own the messages and want journeys triggered by product events.

Verdict. Customer.io suits teams moving from SendGrid Marketing Campaigns to event-driven journeys. Transactional product notifications sit outside its focus.

When you should stay on SendGrid

Email is the only channel on your roadmap, and your server already decides when each email goes out.
You send hundreds of thousands of emails a month on IPs you have already warmed, and delivery rates are where you want them.
Your company already buys Twilio SMS or voice and prefers one vendor, one contract and one security review.
Your setup depends on separating traffic for several brands or clients, and the structure works today.
Your marketing team runs its newsletters and signup forms in Marketing Campaigns and is happy there.

Teams move when they have started writing code around SendGrid: a retry queue for when it is slow, a digest job, a preference table, a second integration for push or SMS. That code is a hidden cost: your team builds it, maintains it, and pays for it in engineering time on top of SendGrid’s price.

How to migrate off SendGrid

01Record baselines. Capture delivery rate, bounce rate, spam complaints and time to inbox for your main email types over two weeks.
02Rebuild templates and workflows. Export the dynamic templates, carry the Handlebars variables across, and keep the new workflows in your repo through the platform's CLI.
03Move users and contacts. Map user IDs, email addresses and any phone numbers or push tokens to user profiles.
04Carry consent state. Export global unsubscribes, group unsubscribes, bounces and spam reports, and import them before the first send.
05Authenticate the new sending domain. Add SPF, DKIM and DMARC records for the new provider and warm any dedicated IP gradually.
06Dual-send. Route a small share of traffic through the new path, compare against your baselines, then move one email type at a time.
07Keep SendGrid for 30 days. Leave the account active as a rollback path and for late webhook events, then close it.

Conclusion

SendGrid covers email delivery at volume, with deliverability tools, libraries in seven languages and a separate product for marketing email. When sending email from code is the whole requirement, Postmark, Resend, Mailgun and Amazon SES are its direct replacements.

Move to a notification platform when email becomes one channel among several: when every kind of message should run from one system, with an orchestration engine for preferences, digests and fallback, and engineers, product, growth and their agents all able to change notifications without a code release. SuprSend does that on top of the email provider you choose, free up to 10,000 notifications a month.

FAQ

Is SendGrid free?

No longer. SendGrid replaced its permanent free plan with a 60-day free trial at 100 emails a day. After that, the Email API starts at $19.95 a month for 50,000 emails on Essentials.

What is the cheapest SendGrid alternative?

Free: Resend 3,000 emails a month, Brevo 300 a day, Mailgun 100 a day, Postmark 100 a month, SuprSend 10,000 notifications a month across all channels. At 50,000 emails a month: Amazon SES about $8, SendGrid $19.95, Resend $20, Mailgun $35, Postmark roughly $66 to $87. SuprSend Essentials is $100 for 50,000, then $2 per 1,000 (Business $250, then $5), plus your email provider. Customer.io bills on profiles, a different unit.

Which SendGrid alternatives include an in-app inbox?

SuprSend and Knock both ship an embeddable bell and feed with client SDKs. Customer.io has in-app messages for campaigns. The email providers and Brevo have no inbox for your product.

Which SendGrid alternatives have an MCP server or agent authoring?

Most do; they differ in what the agent can operate. Postmark's sends email and reads stats, Mailgun's covers 50+ API operations, Resend's manages sends, templates and contacts, and Brevo's covers campaigns and CRM. SuprSend's builds and changes workflows, templates and tenants, sends tests and reads the delivery log, and the SuprSend agent does the same in the dashboard. Twilio's MCP server for SendGrid searches docs only.

Can one platform send transactional and marketing messages?

Yes. Brevo and Customer.io send both from one account. SuprSend and Knock run transactional, product and marketing messages through the same workflows, users and preferences, and send email through the provider you connect. SendGrid sells the two as separate products on separate plans.

Which alternatives support channels other than email?

SuprSend covers nine channels on every plan: email, SMS, WhatsApp, mobile push, web push, Slack, Microsoft Teams, in-app and webhook. Knock covers email, SMS, push, chat, WhatsApp and in-app. Customer.io covers email, push, SMS and in-app. Brevo adds SMS and WhatsApp to email. Postmark, Resend, Mailgun and Amazon SES send email only.

Which alternatives meet SOC 2, HIPAA and GDPR requirements?

SuprSend holds SOC 2 Type II, ISO 27001, GDPR, HIPAA and CPRA, with a HIPAA BAA on Enterprise. Knock offers a HIPAA BAA on Enterprise. SendGrid lists SOC 2 Type II and GDPR with an EU data residency option, and is not HIPAA eligible.

Can I self-host a SendGrid alternative?

None of the eight is open source. SuprSend runs in your VPC, on-prem or as BYOC on Enterprise, with vendor support. Amazon SES keeps sending inside your own AWS account as a managed service. The other six are cloud only.

If I use a notification platform, do I still pay an email provider?

Yes. SuprSend and Knock send email through a provider you connect, such as SendGrid, Postmark, Resend, Mailgun or Amazon SES, and that provider bills you for sending.

8 best SendGrid alternativesfor transactional and marketing email (2026)

Quick guide: SendGrid alternatives by use case