Abstract API Alternative

Abstract API vs Trueguard

Trueguard is an Abstract API alternative for real-time email verification. It checks syntax, MX, SMTP, disposable, catch-all, role, and free-mail signals in one API for $49.99 a month per 50,000 validations, with flat pricing. Abstract's comparable Professional tier is $199 a month. Trueguard also includes bot and fraud prevention.

Reviewed by the Trueguard team. Last reviewed: 2026-06-29.

Low false positive rateReal-time disposable detectionEU data residency

50,000 verifications

Recommended
$49.99/mo

Trueguard

50,000 validations

$0.001 per extra validation. 100 validations per month free, no credit card.

Recurring monthly

vs
$199/mo

Abstract

50,000 requests

Professional plan, billed by monthly request volume.

Professional plan, monthly

About 4x cheaper for ongoing verification at Abstract's comparable Professional tier.

Overview

Is Trueguard a good Abstract API alternative?

Trueguard is a strong Abstract API alternative for real-time email verification. It runs the same core checks (syntax, MX, SMTP, disposable, catch-all, role, free-mail) at $49.99 a month for 50,000 validations versus Abstract's comparable Professional tier at $199 a month. Disposable detection is backed by a continuously updated registry, and bot and fraud prevention is built into the same platform. Abstract remains a strong choice if you need email breach data, sender or domain enrichment, or typo suggestions today, or if you want SOC 2 Type II and a published 99.99% uptime SLA.

At a glance

  • Same core email checks as Abstract
  • $49.99 / month vs $199 Professional 50k
  • Full check set on every plan
  • Real-time disposable registry
  • Bot and fraud prevention optional

Why switch

Why look for an Abstract API alternative?

Abstract API is a capable product. Here are the specific reasons teams look elsewhere.

The checks you need sit on the top tier

Abstract gates disposable, catch-all, quality score, and risk to its Professional plan, which is $199 a month at 50,000 requests. The cheaper Starter and Standard tiers do not include those signals. Trueguard includes the full check set on every plan, from $49.99 a month for 50,000.

Email validation is the whole product

Abstract tells you whether an address is deliverable, but not whether the person behind it is a bot or a fraudster. If you validate email to stop fake signups, you still need browser, device, and IP signals. Trueguard runs email validation as one part of a fraud-prevention platform, so those signals live in the same place.

Unknown answers on catch-alls

Independent testing has found Abstract returns a high share of Unknown results on catch-all domains, around 31% in one test. Unknown is not an answer you can act on, so resolving those addresses falls back on you. Trueguard flags catch-all addresses as Risky with the specific reason attached.

Comparison

Abstract API vs Trueguard, feature by feature

A breakdown across pricing, email verification, breach and enrichment data, and compliance, plus the bot and fraud prevention Trueguard adds on top.

Pricing

50,000 emails per month

Trueguard

$49.99 / month

Recurring. $0.001 per extra validation.

Abstract API

$199 / month

Professional plan, the tier with comparable output.

Free tier

Trueguard

100 validations per month, no credit card

Abstract API

100 requests, no credit card

Pricing model

Trueguard

Flat monthly. Full check set on every plan.

Abstract API

Tiered by monthly request volume.

Disposable and catch-all detection require the Professional plan.

Email verification

Syntax (RFC 5322)

Trueguard

Yes

Abstract API

Yes

MX / DNS check

Trueguard

Yes

Abstract API

Yes, on paid plans

SMTP mailbox check

Trueguard

Yes

Abstract API

Yes

Catch-all detection

Trueguard

Yes. Flagged as Risky.

Deliverable at the server, unconfirmed at the mailbox.

Abstract API

Yes. Higher Unknown rate on catch-all domains.

One independent test marked about 31% of a catch-all list Unknown.

Disposable / temporary detection

Trueguard

Yes. Real-time, continuously updated registry.

Abstract API

Yes. List-based blocklist.

Role-account detection

Trueguard

Yes

Abstract API

Yes

Free-mail provider detection

Trueguard

Yes

Abstract API

Yes

Deliverability classification

Trueguard

Safe, Risky, Invalid, Unknown

Abstract API

Deliverable, Undeliverable, Unknown

Numeric quality score

Trueguard

Status-based, no single numeric score

Abstract API

Yes. quality_score 0.01 to 0.99

Typo / autocorrect suggestions

Trueguard

No

Abstract API

Yes. Suggests a corrected address.

Gibberish / suspicious username

Trueguard

Not a dedicated signal

Abstract API

Yes, on Professional

Spam-trap detection

Trueguard

Not a dedicated signal

Abstract API

Not a dedicated signal

Bulk list upload UI (CSV)

Trueguard

API-first. Script a list in about 10 lines.

Abstract API

Yes. CSV up to 50,000 rows, results emailed.

Breach and enrichment data

Email breach data

Trueguard

Coming soon

Not available today.

Abstract API

Yes, on Professional. Total breaches, dates, breached domains.

Sender enrichment

Trueguard

No

Abstract API

Yes, on Standard and above

Domain enrichment

Trueguard

No

Abstract API

Yes, on Standard and above

Email risk score

Trueguard

Risk surfaced via Safe / Risky status

Abstract API

Yes, on Professional

Fraud prevention platform

Browser fingerprinting

Trueguard

Yes

Abstract API

No, not in email validation

Network fingerprinting (JA4 / HTTP/2)

Trueguard

Yes

Abstract API

No

IP intelligence (VPN, proxy, Tor, datacenter)

Trueguard

Yes, built in

Abstract API

Available as a separate Abstract API

Device intelligence

Trueguard

Yes

Abstract API

No

Event scoring and custom signals

Trueguard

Yes

Abstract API

No

Bot prevention and fraud detection

Trueguard

Full platform

Abstract API

Email validation only

Integrations and SDKs

Real-time REST API

Trueguard

Yes

Abstract API

Yes

Code samples

Trueguard

9 languages (curl, JS, Node, Python, PHP, Go, Ruby, C#, Java)

Abstract API

Yes

Official SDK libraries

Trueguard

No. REST API only.

Abstract API

No. REST API only.

Bulk CSV upload

Trueguard

Via API

Abstract API

Yes. Up to 50,000 rows, results emailed.

Data, compliance and track record

GDPR

Trueguard

Yes

Abstract API

Yes

EU data residency

Trueguard

Yes. EU data residency available. DPA available.

Abstract API

Not advertised for email validation

SOC 2 Type II

Trueguard

No

Abstract API

Yes

Published uptime SLA

Trueguard

No

Abstract API

99.99% advertised

Abstract's Professional tier genuinely does more on enrichment and breach data, and it carries SOC 2 Type II and a published uptime SLA. Trueguard's $49.99 is a flat monthly plan aimed at real-time verification, where it works out roughly 4x cheaper per 50,000 at the comparable tier. Pick based on whether you need enrichment and breach lookups today or flat-priced real-time verification. See pricing for the full plan breakdown, or compare Verifalia vs Trueguard.

Live demo

Try Trueguard on any email

The same checks behind the comparison, running in real time. Paste any address and see the result: syntax, MX, SMTP, disposable, catch-all, role-based, and free-mail detection in one call.

10 free checks per day, no signupReturns Safe, Risky, Invalid, or Unknown

10 free checks a day. No signup. No card.

Paste an address above. Or try one of the examples below.

Pricing

How much does Trueguard cost?

Three tiers. The free plan needs no card. Standalone subscription, no contract, cancel anytime, billed via Stripe.

Free

$0 forever

100 validations / month

Overage: n/a

Popular

Standard

$49.99 / month

50,000 validations / month

Overage: $0.001 per validation

Custom

Contact us

500,000+ validations / month

Overage: Negotiated

Pay for what you check. Cancel anytime. Overage is billed through Stripe at $0.001 per validation regardless of volume.

What counts as a validation? One request to the validation endpoint is one validation. Failed calls (4xx from your side) do not count.

Decision guide

Who should switch, and who should stay on Abstract API

Switch to Trueguard if

  • You verify email in real time at signup or checkout and want flat, predictable monthly pricing, with the full check set included on every plan.
  • You want real-time disposable and temporary detection from a continuously updated registry, in the same call as the core checks.
  • You want bot and fraud prevention that correlates browser, network, IP, and device intelligence into a single risk decision, not separate point lookups.
  • You want a clean REST API with copy-paste code samples in nine languages.

Stay on Abstract API if

  • You need email breach data today. Abstract includes it on Professional, and Trueguard's is coming soon.
  • You need sender or domain enrichment returned alongside the validation result.
  • You need typo and autocorrect suggestions for mistyped addresses.
  • You require SOC 2 Type II and a published 99.99% uptime SLA on the validation product itself.
  • You want a broad, mature suite of standalone data APIs today, such as IP geolocation, phone validation, and company enrichment, from a single established vendor.

Migration

How to migrate from Abstract API to Trueguard

Four steps. You can be running Trueguard validations within minutes of creating your account. The free email verifier lets you spot-check results before writing a line of code.

1

Create a free Trueguard account and get your API key

Sign up at trueguard.io. Your API key appears immediately in the dashboard. No credit card required for the first 100 validations per month.

2

Swap the endpoint

Point your verification calls at POST https://api.trueguard.io/v2/email/validation. Use the X-API-KEY header for authentication. See the code tabs below for working samples in nine languages.

3

Map the response statuses

Map Abstract's deliverability output to Trueguard's. Deliverable maps to Safe, Undeliverable maps to Invalid, and Unknown maps to Unknown. Catch-all and disposable addresses return Risky in Trueguard, with the specific flag surfaced so you can act on it.

4

Run both in parallel before cutover

Run Trueguard and Abstract against the same sample. Compare the results. Cut over when you are satisfied.

The endpoint call in nine languages. Paste, set the key, run.

curl -X POST https://api.trueguard.io/v2/email/validation \ -H "X-API-KEY: $YOUR_KEY" \ -H "Content-Type: application/json" \ -d '{"email":"founder@yourcompany.com"}'

Trust

Why teams trust Trueguard

Straight facts. No fabricated testimonials, no invented metrics.

Low false positive rate

Trueguard combines deterministic checks (syntax, MX, disposable) with a live SMTP probe to keep false positives low. We do not publish a single accuracy percentage, because real-world results depend on the destination mail server.

Real-time disposable registry

Disposable and temporary domains are matched against a continuously updated registry covering Mailinator, Guerrilla Mail, Temp-Mail, 10MinuteMail, and thousands more, in the same call as the core checks.

EU data residency

EU data residency is available and a Data Processing Agreement exists for customers who need one. GDPR-compliant by design.

FAQ

Frequently asked questions

Is Trueguard a good Abstract API alternative?

Yes, for teams that want real-time email verification at a flat price. Trueguard runs the same core checks as Abstract API's email validation product (syntax, MX, SMTP, disposable, catch-all, role, and free-mail detection) and returns a clear Safe, Risky, Invalid, or Unknown status. Trueguard is a single flat plan with the full check set included, and it adds bot and fraud prevention in the same platform. Abstract is the better fit if you specifically need email breach data, sender or domain enrichment, or typo suggestions today.

Is Trueguard cheaper than Abstract API?

For the comparable feature set, yes. Trueguard is $49.99 a month for 50,000 validations, then $0.001 per additional validation. The Abstract API tier with comparable output (disposable, catch-all, quality score, risk, and breach data) is Professional, which is $199 a month at 50,000 requests. That makes Trueguard roughly 4x cheaper at that volume. The difference is tiering: Abstract puts disposable and catch-all detection on its Professional plan, while Trueguard includes the full check set on every plan.

Does Trueguard have email breach data like Abstract API?

Not yet. Email breach data is on the Trueguard roadmap and marked coming soon. Abstract API includes breach data today on its Professional plan, returning total breaches, breach dates, and breached domains. If breach lookups are a hard requirement right now, Abstract is the better fit for that specific signal. For real-time deliverability and disposable detection, Trueguard covers the core checks at a lower price.

Does Trueguard detect disposable and temporary emails?

Yes. Disposable and temporary email detection is a core Trueguard signal, backed by a real-time, continuously updated registry of throwaway domains such as Mailinator, Guerrilla Mail, Temp-Mail, and 10MinuteMail. Abstract API also detects disposable addresses using a list-based blocklist. Both flag throwaway domains. Trueguard's registry is updated continuously, so newly created throwaway domains are caught quickly.

Does Abstract API have a rate limit?

Yes, and it scales by plan. Abstract documents 25 requests per second on the Professional plan, with lower limits on its cheaper tiers. For bulk cleaning, Abstract also offers a CSV upload of up to 50,000 rows with results emailed back. Trueguard is built for real-time, inline verification at the point of signup or checkout, where you validate one address as it is entered.

What does Abstract API email validation cost?

Abstract API offers email validation on five plans: Free, Starter, Standard, Professional, and Enterprise, billed by monthly request volume. The base Starter, Standard, and Professional plans (5,000 requests a month) are $19, $35, and $39. Disposable, catch-all, quality score, and risk checks are part of the Professional plan, which is $199 a month at 50,000 requests. The free tier is 100 requests with no credit card.

Does Trueguard do more than email validation?

Yes. Email validation is one part of a broader fraud prevention platform from the same vendor. Trueguard also offers browser fingerprinting, network fingerprinting using JA4 and HTTP/2 signals, IP intelligence for VPN, proxy, Tor, and datacenter detection, device intelligence, and event scoring with custom signals. Abstract offers some of these as standalone data APIs, such as IP Intelligence and Phone Validation. Trueguard combines its signals into one fraud-prevention platform with event scoring, so they inform a single risk decision.

Try the Abstract API alternative free

100 validations per month, no credit card. Flat $49.99 a month for 50,000 after that.

No credit card required.

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