The Unosend Insider’s Guide
Everything we know about Unosend in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Unosend
The Insider’s Guide
Credit-based email API with REST and SMTP relay
Every plan, grade, refund rule and rival among email sending services, read from Unosend’s own pages.
Made by Unosend · checked Nov 13, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Unosend’s own pages, its app-store listings and our grades. Every fact in it is on Unosend’s page too, where it is kept up to date. Checked Nov 13, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.0
GPA, above 9 of the 50 other email sending services we grade
Unosend is an email API for developers that sells prepaid credits instead of monthly plans. It offers a REST API and an SMTP relay, webhooks, open and click tracking, and SPF, DKIM and DMARC records. The site says the company is being acquired and that service continues as normal.
To get you started, here are 9 things to know about Unosend, taken from its own pages and our grades.
It is an API and SMTP relay, so you add domains and wire it into code.
- 1
Best for pay-as-you-go email API for developers
Unosend sells prepaid sending credits at $4 per 10,000 emails, through a REST API or SMTP, with no subscription.
- 2
What it costs
Paid plans start at $4 per 10,000 emails, prepaid credits.
- 3
You can try it first
3,000 free credits on signup
- 4
It runs on Web
Web.
- 5
REST API and SMTP relay
Send through an HTTP API or standard SMTP on ports 465 and 587.
- 6
Delivery logs
Real-time logs of sends, deliveries, bounces, opens and clicks.
- 7
Sending domains
Unlimited domains with SPF, DKIM and DMARC records.
- 8
A 2.0 GPA, above 9 of 50
That is against the other email sending services we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
To replace Unosend you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one.
Unosend at a glance
- Pricing
- Free trial, from $4 per 10,000 emails, prepaid credits
- Free plan
- No
- Free trial
- 3,000 free credits on signup
- Runs on
- Web
- Made by
- Unosend
- Category
- Email Sending Services
- Our grade
- 2.0 GPA, fair
The report card
Best for pay-as-you-go email API for developers
Unosend sells prepaid sending credits at $4 per 10,000 emails, through a REST API or SMTP, with no subscription. It gives 3,000 credits once at signup and no recurring free plan, and the site banner says the company is being acquired.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | $4 per 10,000 emails, prepaid, with no monthly fee. The vendor does not say what a plan includes beyond sending, so this sits in the ordinary range for email APIs. |
| Free plan and trial | C | 3,000 credits are given once at signup, not each month. The page does not say whether a card is needed. |
| Features | C | REST API, SMTP relay, delivery logs, domains, webhooks and tracking. A dedicated IP is $30 a month, billed annually, and the site's own cards and data disagree on how long credits last. |
| Ease of use | C | No rating on record. It is an API and SMTP relay, so you add domains and wire it into code. |
| Platforms and integrations | C | Web dashboard, API and SMTP. No integrations list, no apps. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Unosend is for
- Fits if you send a few thousand emails a month and want no subscription
- Works for developers who only need an API and SMTP relay
Who it is not for
- Skip it if you want a recurring free plan, because the 3,000 credits come once at signup
- Watch out: the cards say credits last 90 days with no minimum, while the FAQ data says 6 months and a $20 minimum
- Watch out: the site banner says Unosend is being acquired, with service continuing as normal
- Pricey if you need a dedicated IP, at $30 a month billed annually ($360 a year)
- Too light for marketing email, with no campaign tools on the page
Good to know
Good for
- Developers with uneven sending volume who prefer prepaid credits
- Small projects that want no monthly subscription
Worth knowing
- The site banner says Unosend is being acquired, with service continuing as normal.
- The pricing cards and the page's structured data disagree: the cards say credits last 90 days with no minimum, while the FAQ data says 6 months with a 5-credit ($20) minimum.
- A dedicated IP is $30 per month, billed annually ($360 a year).
- There is no recurring free plan; the free credits are given once at signup.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$4
To start
Unosend is a paid product with a free trial, starting at $4 per 10,000 emails, prepaid credits.
The vendor does not say what a plan includes beyond sending, so this sits in the ordinary range for email APIs.
Starter
$4
one-time top-up per 10,000 emails, used as you go
Prepaid credits with no subscription, at $0.0004 per email. The pricing cards say credits last 90 days and that you can top up any amount.
Business
Custom
Volume discounts for teams sending 500,000 or more emails, with an account manager, SLA and custom credit validity.
Trying it first
3,000 free credits on signup
Read from unosend.co on Nov 13, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Credit-based email API with REST and SMTP relay. Here is what it does, as its own site describes it, and what it covers: public API, transactional email.
REST API, SMTP relay, delivery logs, domains, webhooks and tracking.
- REST API and SMTP relay
- Send through an HTTP API or standard SMTP on ports 465 and 587.
- Delivery logs
- Real-time logs of sends, deliveries, bounces, opens and clicks.
- Sending domains
- Unlimited domains with SPF, DKIM and DMARC records.
- Webhooks and tracking
- Webhooks plus open and click tracking.
- Auto top-up
- Credits can be topped up automatically when the balance falls below a set level.
- Dedicated IP
- An optional dedicated sending IP for high-volume senders.
Where it runs
- Web
What it works with
Its own pages name no integrations.
Unosend is made by Unosend.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
9/50
Other email sending services it is graded above
Unosend's GPA of 2.0 is higher than 9 of the 50 other email sending services we grade, and level with 4.
Each grade against the category
Every bar is all 51 email sending services we grade, cut by the letter each got. Unosend’s own letter is outlined.
- CValue for moneyAbove 8 of 50
- CFree plan and trialAbove 11 of 50
- CFeaturesAbove 0 of 50
- CEase of useAbove 7 of 50
- CPlatforms and integrationsAbove 0 of 50
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace Unosend you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 37 of the 50 other email sending services grade higher.
What you could not
- Mail servers with a good name among inbox providers.
- An API that other software can build on.
What this rests on. Unosend’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Resend, Twilio SendGrid, Mailgun, Postmark and Amazon SES
The 5 tools Unosend is most often weighed against, with where each one differs from it.
- 2.6GPA
Resend
Free plan · from $20/mo
Developer email API with React Email templates and a free tier.
- Resend has a free plan. Unosend does not, though it has a free trial.
- Resend also covers email campaigns.
- 2.6GPA
Twilio SendGrid
Free trial · from $19.95/mo
Twilio's email API and SMTP service, priced by monthly email volume.
- Twilio SendGrid also covers email verification.
- 2.4GPA
Mailgun
Free plan · from $15/mo
Email API and SMTP relay for developers, with list validation.
- Mailgun has a free plan. Unosend does not, though it has a free trial.
- Mailgun also covers email verification.
- 2.2GPA
Postmark
Free plan · from $15/mo
Transactional email API and SMTP, with broadcasts on a separate stream.
- Postmark has a free plan. Unosend does not, though it has a free trial.
- Postmark also covers dMARC.
- 2.8GPA
Amazon SES
Free trial
AWS email sending and receiving, paid per 1,000 emails.
- Amazon SES also covers email verification.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
11
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Unosend free?
No, Unosend is a paid product, but you can try it first. 3,000 free credits on signup.
How much does Unosend cost?
Unosend lists 2 plans. Starter: $4 one-time top-up per 10,000 emails, used as you go.
What platforms does Unosend work on?
Unosend is available on Web.
Does Unosend have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Unosend is listed for Web.
Does Unosend have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Unosend is listed for Web.
Is Unosend open source?
Unosend is not described as open source on its own site, as read on Nov 13, 2026.
Does Unosend have an API?
Yes. Unosend offers a public API, according to its own site.
Who makes Unosend?
Unosend is made by a company of the same name.
What are the alternatives to Unosend?
The closest alternatives to Unosend in our directory are Resend, Twilio SendGrid, Mailgun, Postmark and Amazon SES.
How does Unosend compare with other email sending services?
Unosend's GPA of 2.0 is higher than 9 of the 50 other email sending services we grade, and level with 4.
Could I make my own version of Unosend?
To replace Unosend you would be making mail servers with a good name among inbox providers.
Where this guide comes from
The prices, plans, platforms and features were read from Unosend’s own pages on Nov 13, 2026, and the grades were given on Nov 13, 2026. Graded from this listing, whose facts were read from Unosend's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Unosend. Prices change, so check unosend.co before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
7,721
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
7,721
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Unosend, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/unosend
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Unosend: The Insider's Guide", checked Nov 13, 2026. https://toolgpa.com/tools/unosend
Know someone choosing between email sending services?
Send them this guide: toolgpa.com/tools/unosend/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded email sending services after Unosend, each with an Insider's Guide of its own.
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- FluentSMTP Insider's GuideFree WordPress plugin for sending site email through your provider3.2 GPA
- Amazon SES Insider's GuideAWS email sending and receiving, paid per 1,000 emails2.8 GPA
- Forward Email Insider's GuideOpen-source email forwarding and hosting for custom domains2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Unosend’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Unosend is a trademark of its owner, and this guide is not made, paid for or approved by Unosend. Prices and plans change: check unosend.co before you buy.