AbstractAPI validation alternative
AbstractAPI sells many small APIs, one of which validates email. That shape is fine for a signup form and thin for a list.
Published prices
AbstractAPI
$17
a month for 5,000 credits
BounceIntel
$15
a month for 10,000 credits
AbstractAPI figures from their pricing page, checked September 10, 2026.
Also compared
Short answer
BounceIntel is the alternative once email validation stops being one field in a form: mailbox-level checks, a real bulk workflow, documented reason codes and support from people who only work on verification.
01Published prices
Only figures each vendor publishes on its pricing page. If they do not list a figure, we say so. Confirm on their site before you buy.
100 per month on the free tier
100 on signup, no card
$17 a month for 5,000 credits
$15 a month for 10,000 credits
$39 a month for 10,000 credits
$15 a month for 10,000 credits
$0.00333 per credit
$0.00065 per credit at 1,000,000 a month
Yes, unused monthly credits reset
Monthly allotment resets; pay as you go packs do not
Included with paid credits
Issued with any paid plan
| What is compared | AbstractAPI | BounceIntel |
|---|---|---|
| Free credits | 100 per month on the free tier | 100 on signup, no card |
| Smallest paid plan | $17 a month for 5,000 credits | $15 a month for 10,000 credits |
| 10,000 credits | $39 a month for 10,000 credits | $15 a month for 10,000 credits |
| Lowest listed rate | $0.00333 per credit | $0.00065 per credit at 1,000,000 a month |
| Do unused credits expire? | Yes, unused monthly credits reset | Monthly allotment resets; pay as you go packs do not |
| API access | Included with paid credits | Issued with any paid plan |
AbstractAPI figures from their pricing page, checked September 10, 2026.
September 12, 2026
AbstractAPI packages a catalogue of small, single-purpose APIs. Email validation is one of them, and for stopping typos at a registration form it does the job with very little effort.
What it is not built for is the second stage: a list of 200,000 addresses, a client asking why a contact was dropped, or a threshold you need to tune with more than one field.
Speed of adoption. A key, one call, a boolean-ish answer, done in an afternoon. For a side project or an early product that is exactly the right amount of tool.
Having several unrelated APIs behind one account is also convenient if you use more than one of them.
A company running forty APIs cannot go as deep on any one of them as a company running one. That shows up in the parts of verification that are genuinely hard: catch-all handling, greylisting, provider-specific behaviour, and the reporting around a large job.
It also shows up in the workflow. Verification at scale is a file problem and a job problem, not only an endpoint problem, and a catalogue API is usually an endpoint.
The pipeline goes down to the mailbox, and the response says how far it got: verdict, score from 0 to 100, documented reason codes, recommended action.
Bulk is a first-class part of the product rather than a loop over the single endpoint, and the results come back as an annotated CSV plus a PDF summary.
If all you need is to stop obvious typos at a form and you have no list to clean, a lightweight check is a perfectly good answer and swapping it out is not urgent.
The moment to move is when a list appears, or when somebody asks why an address was accepted or rejected and a boolean is not an answer.
02FAQ
For catching typos, often. It will not tell you whether the mailbox exists, whether the domain accepts everything, or whether the address is a role account, and those are the things that decide a campaign.
Ours returns a verdict, a numeric score, documented reason codes and a recommended action rather than a handful of booleans. Branch on the verdict first and use the rest when you need finer rules.
Yes, a job API: submit a list, poll for progress, download the annotated results. It is a different endpoint from the single check for good reasons, and both return the same object per address.
Signup credits, no card. Enough to run your own sample and see the response shape before writing anything against it.
Pay as you go credits stay until you use them. Monthly plan allotments reset with the billing period, which is the trade for the lower monthly rate.
If a form-level check is all you need and you already call other AbstractAPI endpoints from the same key, staying is the simpler architecture. Move when you have a list to clean, or when a boolean is no longer an answer you can defend.
Keep comparing
Most shortlists have three names on them. These are the ones that usually sit next to this one.
If you send through Mailgun and validate occasionally, their add-on is the path of least resistance. BounceIntel is the alternative when you want verification that survives changing your sending provider.
Read the comparisonBounceIntel is a Verifalia alternative worth testing if you want reason codes and a recommended action in the same response, one bearer token rather than a session model, and API access included with any paid plan.
Read the comparisonBounceIntel is a Clearout alternative for teams that want documented reason codes rather than a count of checks performed, and the same response schema from the dashboard, bulk jobs and the API.
Read the comparisonAbstractAPI is a trademark of its owner and is named here only to describe what this page compares. This page is not written, reviewed or endorsed by them, and their plans change, so confirm the current terms on their site before you decide.
Sign up, run a real sample, and hold the verdicts up against whatever you use today.