Abstract Email Validation vs mailboxlayer (2026): which should you pick?
As of Nov 12, 2026, Abstract Email Validation grades higher than mailboxlayer: 2.0 against 1.8 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Abstract Email Validation grades higher on ease of use. They get the same grade on value for money, the free plan, features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Abstract Email Validation
Email validation API: format, MX and SMTP checks in one call
mailboxlayer
Email validation API that returns a JSON quality score
Which one is for you
Pick Abstract Email Validation if
- 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
Look elsewhere if
- 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
Pick mailboxlayer if
- Fits if you are a developer who wants to check addresses at sign-up
- Works for side projects that stay under 100 requests a month
Look elsewhere if
- Not for you if you want to upload a list, because there is only an API
- Tight if you stay free, with 100 non-commercial requests
- Pricey if you want bulk: it starts at $74.99 a month
- Watch out: the homepage text mentions 1,000 free requests and $9.99 plans that the pricing page does not show
- Watch out: every address counts as one request
How we grade them
| 2.0GPAAbstract Email ValidationFair | 1.8GPAmailboxlayerWeak | |
|---|---|---|
| Value for money | CStarter 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. | CBasic is $14.99 a month for 5,000 requests, between the $10 cheaper quarter and the $17.99 middle. Professional Plus is $74.99 and Enterprise Plus $249.99, all billed monthly with yearly at a discount. |
| Free plan and trial | CFree is 100 requests a month at 3 requests a second, with no card. Fine for testing, too small for a list. | CFree is 100 API requests, non-commercial, with no support and no catch-all detection. Commercial use needs Basic. |
| Features | CFormat, MX and SMTP checks, typo suggestions and bulk CSV upload. Enrichment and risk data are on the dearer plans. | CSyntax, SMTP, disposable and role checks with a score. No list upload exists, and catch-all detection and bulk need paid plans. |
| Ease of use | CNo 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. | DNo store rating on record. It is an API only, so you need code to use it. |
| Platforms and integrations | CWeb and an API. No integrations or apps are listed. | CWeb API only. No apps and no integrations are listed. |
| Best for | checking email addresses through an API | an email check API for developers |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Abstract Email Validation and mailboxlayer. How we grade
Price against what you get
Abstract Email Validation starts at $17 a month and scores 2.0 out of 4 on features, ease of use and platforms. mailboxlayer starts at $14.99 a month and scores 1.7.
Abstract Email Validation scores higher, and starts $2.01 a month higher: the question is whether the extra is worth that to you. Of the other email verification and deliverability tools on the chart, 9 score higher than Abstract Email Validation for less, and 8 score higher than mailboxlayer for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
At a glance
| Abstract Email Validation | mailboxlayer | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $17 per month for 5,000 requests a month, billed annually | $14.99 per month for 5,000 requests |
| Free plan | 100 requests a month at 3 requests per second, with the full response and no credit card. | 100 API requests, for non-commercial use only. |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Abstract API | APILayer |
| Price read from | abstractapi.com | mailboxlayer.com |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Abstract Email Validation
- 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.
mailboxlayer
- An API only: there is no list upload or bulk cleaning page, and the bulk endpoint starts at Professional Plus.
- The free plan is 100 requests and non-commercial; the homepage text mentions 1,000 free monthly requests and subscriptions from $9.99, which the pricing page does not show.
- Each address checked counts as one API request; overage is listed as a per-request charge on the pricing page.
- Yearly billing is discounted by 10% to 15% depending on the plan.
Key features
Abstract Email Validation
- 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.
mailboxlayer
- Syntax and typo check
- Validates format and returns a did-you-mean suggestion for common typos.
- Real-time SMTP check
- Pings the address's mail server and tests it for catch-all configuration; catch-all detection is not in the free plan.
- Free and disposable filters
- A daily-updated provider database flags addresses at free providers such as Gmail and at disposable ones such as Mailinator.
- Role detection
- Flags role addresses that map to a function instead of a person.
- Quality score
- Each response includes a numeric score for the address's quality and deliverability.
- Usage statistics
- Daily and monthly request counts, with notifications when a plan's allowance runs low.
Plans
Abstract Email Validation
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.
EnterpriseCustom
Flexible volume and rate limits, commercial license, SOC 2 and GDPR, enhanced SLA and a dedicated account manager.
mailboxlayer
Free$0
100 API requests, non-commercial use, no support, no catch-all detection.
Basic$14.99
per month for 5,000 requests, billed monthly
Commercial use, standard support and catch-all detection. Yearly billing is $161.99.
Professional Plus$74.99
per month for 50,000 requests, billed monthly
Adds a bulk endpoint that takes 25 emails at a time. Yearly billing is $787.99.
Enterprise Plus$249.99
per month for 250,000 requests, billed monthly
Bulk endpoint of 100 emails per call. Yearly billing is $2,549.99.
CustomCustom
Unlimited requests and dedicated support, quoted by the vendor.
Ways to pay less
Abstract Email Validation
- Annual discount
Annual billing saves 10%
The pricing page says annual billing is 10% cheaper than paying monthly for the same plan.
mailboxlayer
- Annual discount
Save 10% to 15% with yearly billing
The pricing page shows yearly totals with discounts of 10% (Basic), 12.5% (Professional Plus) and 15% (Enterprise Plus).
Common questions
Which is cheaper, Abstract Email Validation or mailboxlayer?
As of Nov 12, 2026, mailboxlayer is cheaper to start with: $14.99 a month, against $17 a month for Abstract Email Validation. Abstract Email Validation starts at $17 per month for 5,000 requests a month, billed annually, and mailboxlayer starts at $14.99 per month for 5,000 requests.
Which has a free plan, Abstract Email Validation or mailboxlayer?
As of Nov 12, 2026, both Abstract Email Validation and mailboxlayer have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.