The Abstract Email Validation Insider’s Guide
Everything we know about Abstract Email Validation 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.
Abstract Email Validation
The Insider’s Guide
Email validation API: format, MX and SMTP checks in one call
Every plan, grade, refund rule and rival among email verification and deliverability tools, read from Abstract Email Validation’s own pages.
Made by Abstract API · checked Nov 12, 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 Abstract Email Validation’s own pages, its app-store listings and our grades. Every fact in it is on Abstract Email Validation’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.0
GPA, above 4 of the 38 other email verification and deliverability tools we grade
Abstract's Email Validation API checks whether an address is real and can receive mail, at the moment someone submits it. One request returns format, MX record and SMTP checks, plus disposable and catch-all flags and a quality score. Higher plans add sender, domain, risk and breach data. It is one of several APIs Abstract sells, each billed separately.
To get you started, here are 9 things to know about Abstract Email Validation, taken from its own pages and our grades.
It is an API, so someone has to wire it into a form or a script, though a dashboard and CSV upload exist.
- 1
Best for checking email addresses through an API
Abstract's email validation API runs format, MX and SMTP checks in one call.
- 2
Paid plans start at $17 a month
As its pricing page puts it: $17 per month for 5,000 requests a month, billed annually.
- 3
There is a free plan
100 requests a month at 3 requests per second, with the full response and no credit card.
- 4
It runs on Web
Web.
- 5
Four checks in one call
Format, MX records, a live SMTP check without sending a message, and disposable and catch-all flags come back in one JSON response.
- 6
Typo suggestions
The response can include a suggested correction for a mistyped address.
- 7
Real-time and bulk
Use the API on signup forms, or upload a CSV on paid plans.
- 8
A 2.0 GPA, above 4 of 38
That is against the other email verification and deliverability tools we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
Nothing Abstract Email Validation does is plain enough to make in a weekend. The 2 things listed below take a company.
Abstract Email Validation at a glance
- Pricing
- Free plan, from $17 per month for 5,000 requests a month, billed annually
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web
- Made by
- Abstract API
- Category
- Email Verification & Deliverability
- Our grade
- 2.0 GPA, fair
The report card
Best for checking email addresses through an API
Abstract's email validation API runs format, MX and SMTP checks in one call. The free tier is 100 requests a month, which suits testing and not lists, the $17 entry price covers only 5,000 requests a month, and risk and breach data wait on the $39 plan.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | Starter is $17 a month for 5,000 requests on annual billing, just under the $17.99 middle for email deliverability tools. Standard and Professional are $37 and $39 at the same volume, and more volume costs more. |
| Free plan and trial | C | Free is 100 requests a month at 3 requests a second, with no card. Fine for testing, too small for a list. |
| Features | C | Format, MX and SMTP checks, typo suggestions and bulk CSV upload. Enrichment and risk data are on the dearer plans. |
| Ease of use | C | No store rating on record. It is an API, so someone has to wire it into a form or a script, though a dashboard and CSV upload exist. |
| Platforms and integrations | C | Web and an API. No integrations or apps are listed. |
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 Abstract Email Validation is for
- Fits if you are a developer adding address checks to a sign-up form
- Works for small teams that want to try a validator on 100 addresses a month
Who it is not for
- Tight if you check lists, as the free tier is 100 requests a month
- Pricey if you want enrichment or risk and breach data, which are $37 and $39 at 5,000 requests
- Watch out: the prices shown are for 5,000 requests a month, and more volume costs more
- Watch out: the monthly price was not confirmed, and the page still carried a holiday banner ending January 3rd
Good to know
Good for
- Developers validating addresses on signup forms
- Small apps that need a few thousand checks a month
- Teams already using Abstract's phone or IP APIs
Worth knowing
- The free tier is 100 requests a month, which suits testing rather than lists.
- Prices shown are for the entry volume of 5,000 requests a month; more volume costs more and the page sets it in the dashboard.
- The page says annual billing saves 10%, but its source shows the same figures for monthly and yearly, so the monthly price was not confirmed.
- The pricing page still carried a holiday discount banner with a January 3rd end date, which looked out of date.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$17
A month to start. There is a free plan too
Abstract Email Validation has a free plan. Paid plans start at $17 per month for 5,000 requests a month, billed annually.
Free
$0
100 requests a month at 3 requests per second.
Starter
$17
per month for 5,000 requests a month, billed annually
Core validation fields: deliverability, with domain whitelisting and bulk CSV upload. Higher request volumes cost more; the page offers 15,000, 30,000, 50,000 and 150,000 a month.
Standard
$37
per month for 5,000 requests a month, billed annually
Adds email sender and domain enrichment to Starter. Price rises with volume.
Professional
$39
per month for 5,000 requests a month, billed annually
Adds email quality, risk and breach data. Price rises with volume.
Enterprise
Custom
Flexible volume and rate limits, commercial license, SOC 2 and GDPR, enhanced SLA and a dedicated account manager.
The free plan
100 requests a month at 3 requests per second, with the full response and no credit card.
Read from abstractapi.com on Nov 12, 2026.
Ways to pay less
Annual discount
Annual billing saves 10%
The pricing page says annual billing is 10% cheaper than paying monthly for the same plan.
Stated on abstractapi.com
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
Email validation API: format, MX and SMTP checks in one call. Here is what it does, as its own site describes it, and what it covers: public API, email verification.
Format, MX and SMTP checks, typo suggestions and bulk CSV upload.
- Four checks in one call
- Format, MX records, a live SMTP check without sending a message, and disposable and catch-all flags come back in one JSON response.
- Typo suggestions
- The response can include a suggested correction for a mistyped address.
- Real-time and bulk
- Use the API on signup forms, or upload a CSV on paid plans.
- Risk and reputation data
- Higher plans add sender, domain, quality, risk and breach fields to the same response.
- Separate meters per API
- Email, phone and IP APIs are priced and billed on their own, so only the ones you call appear on the bill.
Where it runs
- Web
What it works with
Its own pages name no integrations.
Abstract Email Validation is made by Abstract API.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
4/38
Other email verification and deliverability tools it is graded above
Abstract Email Validation's GPA of 2.0 is higher than 4 of the 38 other email verification and deliverability tools we grade, and level with 7.
Its paid plans start at $17 a month, against a middle price of $17.49 for the category: 12 of the 25 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 9 tools score higher and cost less.
Each grade against the category
Every bar is all 39 email verification and deliverability tools we grade, cut by the letter each got. Abstract Email Validation’s own letter is outlined.
- CValue for moneyAbove 5 of 38
- CFree plan and trialAbove 5 of 38
- CFeaturesAbove 0 of 38
- CEase of useAbove 1 of 38
- CPlatforms and integrationsAbove 0 of 38
Price against what you get
Each dot is one of 26 email verification and deliverability tools. Further left costs less; higher up scores better on features, ease of use and platforms. Abstract Email Validation is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
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
Nothing Abstract Email Validation does is plain enough to make in a weekend. The 2 things listed below take a company.
That makes this kind of software worth paying for, not this one in particular: 27 of the 38 other email verification and deliverability tools grade higher. It costs $204 a year.
What you could not
- Checking that an address exists without writing to it.
- An API that other software can build on.
What this rests on. Abstract Email Validation’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
ZeroBounce, Kickbox, mailboxlayer, NeverBounce and QuickEmailVerification
The 5 tools Abstract Email Validation is most often weighed against, with where each one differs from it.
- 2.4GPA
ZeroBounce
Free plan · from $39 one-time
Email list verification with warm-up and DMARC monitoring in one plan.
- Only ZeroBounce lists an iOS app.
- ZeroBounce also covers inbox warm-up and dMARC.
- 2.4GPA
Kickbox
Free trial · from $5 one-time
Pay-as-you-go email verification with an optional threat score.
- Abstract Email Validation has a free plan. Kickbox does not, though it has a free trial.
- 1.8GPA
mailboxlayer
Free plan · from $14.99/mo
Email validation API that returns a JSON quality score.
- 2.4GPA
NeverBounce
Free trial · from $8 one-time
Email list cleaning and real-time verification, now part of ZoomInfo.
- Abstract Email Validation has a free plan. NeverBounce does not, though it has a free trial.
- 3.0GPA
QuickEmailVerification
Free plan · from $4 one-time
Bulk email list cleaning and a real-time verification API.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
13
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 Abstract Email Validation free?
Abstract Email Validation has a free plan. 100 requests a month at 3 requests per second, with the full response and no credit card.
How much does Abstract Email Validation cost?
Abstract Email Validation lists 5 plans. Free: $0.
What platforms does Abstract Email Validation work on?
Abstract Email Validation is available on Web.
Does Abstract Email Validation offer any discounts?
Abstract Email Validation publicly lists the following: Annual billing saves 10%.
Does Abstract Email Validation have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Abstract Email Validation is listed for Web.
Does Abstract Email Validation have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Abstract Email Validation is listed for Web.
Is Abstract Email Validation open source?
Abstract Email Validation is not described as open source on its own site, as read on Nov 12, 2026.
Does Abstract Email Validation have an API?
Yes. Abstract Email Validation offers a public API, according to its own site.
Who makes Abstract Email Validation?
Abstract Email Validation is made by Abstract API.
What are the alternatives to Abstract Email Validation?
The closest alternatives to Abstract Email Validation in our directory are ZeroBounce, Kickbox, mailboxlayer, NeverBounce and QuickEmailVerification.
How does Abstract Email Validation compare with other email verification and deliverability tools?
Abstract Email Validation's GPA of 2.0 is higher than 4 of the 38 other email verification and deliverability tools we grade, and level with 7.
Is Abstract Email Validation good value for money?
ToolGPA grades Abstract Email Validation C for value for money. On features, ease of use and platforms it scores 2.0 out of 4.
Could I make my own version of Abstract Email Validation?
Nothing Abstract Email Validation does is plain enough to make in a weekend.
Where this guide comes from
The prices, plans, platforms and features were read from Abstract Email Validation’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from Abstract API's own pages on 12 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 Abstract API. Prices change, so check abstractapi.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
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.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Abstract Email Validation, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/abstract-email
- 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, "Abstract Email Validation: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/abstract-email
Know someone choosing between email verification and deliverability tools?
Send them this guide: toolgpa.com/tools/abstract-email/guide
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See our other guides
The best-graded email verification and deliverability tools after Abstract Email Validation, each with an Insider's Guide of its own.
- Email Verification & Deliverability Insider's GuideEvery one of the 40 email verification and deliverability tools we grade, compared
- QuickEmailVerification Insider's GuideBulk email list cleaning and a real-time verification API3.0 GPA
- Mail-Tester Insider's GuideSend an email to a test address and get a spam score out of 102.8 GPA
- Reoon Email Verifier Insider's GuideBulk and real-time email verification with refunds on unknowns2.8 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 Abstract Email Validation’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. Abstract Email Validation is a trademark of its owner, and this guide is not made, paid for or approved by Abstract API. Prices and plans change: check abstractapi.com before you buy.