SendGrid and Mailgun both send transactional email through an API or SMTP, and the short verdict is this: choose Mailgun if you are a developer-led small team that wants cheap entry pricing, detailed logs and inbound routing, and choose SendGrid if you want one vendor that also covers marketing campaigns and a larger template and support ecosystem. For a pure password-reset-and-receipt workload at low volume, Mailgun's documented entry tier is usually the lower bill. Prices below are as published by third-party trackers in 2026, so verify current pricing on each vendor page before you commit.
The two products look alike on a feature checklist, which is why people search for this comparison at all. The differences show up in pricing structure, free-tier policy, dedicated IP cost, and how much of the product is built for developers versus marketers. This comparison sorts those out for a small business sending order confirmations, password resets, invoices and notification email, not bulk newsletters. If your real need is newsletters, our best email marketing software roundup is the better starting point.
How We Compared These Email APIs
We compared SendGrid and Mailgun using each vendor's published pricing and documentation, third-party pricing trackers, and patterns across verified user reviews. We did not send mail through either account or measure delivery rates ourselves. Where sources disagree, we say so rather than pick a number. The yardstick is the same for both: entry price for a small sender, what the free option actually is, what a dedicated IP costs, how logs and inbound email work, and what happens when deliverability goes wrong.
One honest limit up front: deliverability, meaning how often mail lands in the inbox, depends mostly on your domain setup, sending reputation and content, not on the vendor name. No pricing page can promise it, and anyone quoting a single winning percentage is selling something.
Pricing compared for a small sender
Published 2026 figures point to a clear pattern at the low end. Mailgun documents a Basic plan at about $15 per month for 10,000 emails and a Foundation plan at about $35 per month for 50,000 emails. SendGrid documents Essentials at about $19.95 per month for roughly 50,000 emails and Pro at about $89.95 per month for roughly 100,000 emails with a dedicated IP included. One tracker lists SendGrid Essentials at a lower monthly cap than 50,000, so treat that limit as unsettled.
Free access has changed. Several 2026 sources report that SendGrid no longer offers a permanent free tier and now uses a time-limited trial, while Mailgun is reported to keep a small permanent free plan of around 100 emails per day. Sources also conflict on Mailgun's Foundation price once a dedicated IP is included, with one tracker showing about $75. That is exactly the kind of number to confirm on the live page.
| Factor | SendGrid | Mailgun |
|---|---|---|
| Entry paid plan (documented) | Essentials, about $19.95/month | Basic, about $15/month |
| Included volume at entry | Roughly 50,000 emails (sources vary) | 10,000 emails |
| Free option | Reported as a time-limited trial | Reported as a small permanent plan |
| Dedicated IP | Included on Pro, about $89.95/month | Higher tiers or add-on, verify cost |
| Marketing campaigns | Built in, separate product line | Not the focus |
| Inbound email parsing | Available | Documented strength |
| Best fit | Mixed transactional and marketing needs | Developer-led transactional sending |
Where SendGrid is the stronger choice
SendGrid is documented as a broader platform. Beyond the API it offers a visual template editor, marketing campaign tools and a large body of tutorials, which suits a team where a non-developer needs to edit a receipt template or send an occasional announcement. Its higher entry volume makes the Essentials plan good value if you genuinely send tens of thousands of messages a month. Our standalone SendGrid review covers the product in more depth.
The recurring complaints in published reviews are worth weighing. Reviewers report that support quality varies by plan, that shared IP reputation can affect small senders on lower tiers, and that account suspensions during onboarding feel abrupt. Dedicated IP access being tied to the Pro tier means a small sender who wants an isolated reputation pays a large jump. None of this is unique to SendGrid, but it is the pattern most often cited.
Where Mailgun is the stronger choice
Mailgun is documented as developer-first. Its logs, event webhooks, inbound routing and email validation tools are commonly praised, and its entry plan costs less at low volume. If your engineer wants to receive replies as structured data or inspect exactly what happened to a message, reviewers consistently describe Mailgun as the more transparent option.
The trade-offs are also consistent. Mailgun has no meaningful marketing-campaign side, so a business wanting newsletters and transactional mail under one login will need a second tool. Reviewers also report that the interface is less friendly to non-technical users, and that cost can climb quickly once you add a dedicated IP or need longer log retention. Evidence on support is mixed, so check what your plan includes.
Deliverability, logs and the things pricing pages skip
Three practical points matter more than the headline price. First, set up SPF, DKIM and DMARC on your sending domain whichever vendor you pick, because both providers expect it and mailbox providers enforce it. Second, ask whether you need a dedicated IP at all. Low-volume senders often do better on a well-managed shared pool, because a dedicated IP needs steady volume to build reputation. Third, plan for exits. Both services let you export suppression lists and your domain stays yours, so switching later means updating DNS and API calls, not rebuilding your product.
If a cloud-provider option such as Amazon SES enters the conversation, expect lower per-message cost but more setup work and thinner tooling. That is a different comparison, and this one stays focused on the two named vendors.
Which one fits which small business
An online store with a developer or a contractor on call, sending order and shipping notices, is the profile that best matches Mailgun's documented strengths. A service business whose staff edits email templates, and who also wants occasional campaigns, is the profile that matches SendGrid. A team already living inside a CRM or marketing platform may not need either, since tools such as Brevo bundle transactional sending with campaigns at a single price. If you are unsure, start with the lowest paid tier of one vendor, keep your sending code behind a thin wrapper, and treat the first month as the real test of your own deliverability.
The bottom line: pick Mailgun for developer-led, low-volume transactional sending at the lowest entry price, pick SendGrid if non-developers need templates and campaigns under the same roof, and verify both vendors' current pricing before you commit.
