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.
50,000 verifications
Trueguard
50,000 validations
$0.001 per extra validation. 100 validations per month free, no credit card.
Recurring monthly
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.
| Feature | TrueguardRecommended | Abstract API |
|---|---|---|
| Pricing | ||
| 50,000 emails per month | $49.99 / month Recurring. $0.001 per extra validation. | $199 / month Professional plan, the tier with comparable output. |
| Free tier | 100 validations per month, no credit card | 100 requests, no credit card |
| Pricing model | Flat monthly. Full check set on every plan. | Tiered by monthly request volume. Disposable and catch-all detection require the Professional plan. |
| Email verification | ||
| Syntax (RFC 5322) | Yes | Yes |
| MX / DNS check | Yes | Yes, on paid plans |
| SMTP mailbox check | Yes | Yes |
| Catch-all detection | Yes. Flagged as Risky. Deliverable at the server, unconfirmed at the mailbox. | Yes. Higher Unknown rate on catch-all domains. One independent test marked about 31% of a catch-all list Unknown. |
| Disposable / temporary detection | Yes. Real-time, continuously updated registry. | Yes. List-based blocklist. |
| Role-account detection | Yes | Yes |
| Free-mail provider detection | Yes | Yes |
| Deliverability classification | Safe, Risky, Invalid, Unknown | Deliverable, Undeliverable, Unknown |
| Numeric quality score | Status-based, no single numeric score | Yes. quality_score 0.01 to 0.99 |
| Typo / autocorrect suggestions | No | Yes. Suggests a corrected address. |
| Gibberish / suspicious username | Not a dedicated signal | Yes, on Professional |
| Spam-trap detection | Not a dedicated signal | Not a dedicated signal |
| Bulk list upload UI (CSV) | API-first. Script a list in about 10 lines. | Yes. CSV up to 50,000 rows, results emailed. |
| Breach and enrichment data | ||
| Email breach data | Coming soon Not available today. | Yes, on Professional. Total breaches, dates, breached domains. |
| Sender enrichment | No | Yes, on Standard and above |
| Domain enrichment | No | Yes, on Standard and above |
| Email risk score | Risk surfaced via Safe / Risky status | Yes, on Professional |
| Fraud prevention platform | ||
| Browser fingerprinting | Yes | No, not in email validation |
| Network fingerprinting (JA4 / HTTP/2) | Yes | No |
| IP intelligence (VPN, proxy, Tor, datacenter) | Yes, built in | Available as a separate Abstract API |
| Device intelligence | Yes | No |
| Event scoring and custom signals | Yes | No |
| Bot prevention and fraud detection | Full platform | Email validation only |
| Integrations and SDKs | ||
| Real-time REST API | Yes | Yes |
| Code samples | 9 languages (curl, JS, Node, Python, PHP, Go, Ruby, C#, Java) | Yes |
| Official SDK libraries | No. REST API only. | No. REST API only. |
| Bulk CSV upload | Via API | Yes. Up to 50,000 rows, results emailed. |
| Data, compliance and track record | ||
| GDPR | Yes | Yes |
| EU data residency | Yes. EU data residency available. DPA available. | Not advertised for email validation |
| SOC 2 Type II | No | Yes |
| Published uptime SLA | No | 99.99% advertised |
Pricing
50,000 emails per month
Trueguard
Recurring. $0.001 per extra validation.
Abstract API
Professional plan, the tier with comparable output.
Free tier
Trueguard
Abstract API
Pricing model
Trueguard
Abstract API
Disposable and catch-all detection require the Professional plan.
Email verification
Syntax (RFC 5322)
Trueguard
Abstract API
MX / DNS check
Trueguard
Abstract API
SMTP mailbox check
Trueguard
Abstract API
Catch-all detection
Trueguard
Deliverable at the server, unconfirmed at the mailbox.
Abstract API
One independent test marked about 31% of a catch-all list Unknown.
Disposable / temporary detection
Trueguard
Abstract API
Role-account detection
Trueguard
Abstract API
Free-mail provider detection
Trueguard
Abstract API
Deliverability classification
Trueguard
Abstract API
Numeric quality score
Trueguard
Abstract API
Typo / autocorrect suggestions
Trueguard
Abstract API
Gibberish / suspicious username
Trueguard
Abstract API
Spam-trap detection
Trueguard
Abstract API
Bulk list upload UI (CSV)
Trueguard
Abstract API
Breach and enrichment data
Email breach data
Trueguard
Not available today.
Abstract API
Sender enrichment
Trueguard
Abstract API
Domain enrichment
Trueguard
Abstract API
Email risk score
Trueguard
Abstract API
Fraud prevention platform
Browser fingerprinting
Trueguard
Abstract API
Network fingerprinting (JA4 / HTTP/2)
Trueguard
Abstract API
IP intelligence (VPN, proxy, Tor, datacenter)
Trueguard
Abstract API
Device intelligence
Trueguard
Abstract API
Event scoring and custom signals
Trueguard
Abstract API
Bot prevention and fraud detection
Trueguard
Abstract API
Integrations and SDKs
Real-time REST API
Trueguard
Abstract API
Code samples
Trueguard
Abstract API
Official SDK libraries
Trueguard
Abstract API
Bulk CSV upload
Trueguard
Abstract API
Data, compliance and track record
GDPR
Trueguard
Abstract API
EU data residency
Trueguard
Abstract API
SOC 2 Type II
Trueguard
Abstract API
Published uptime SLA
Trueguard
Abstract API
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.
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.
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.
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.
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.
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.
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.
Keep exploring
More Trueguard email tools
Free tools and references that run on the same verification engine.
Free email verifier
Check any address. 10 free per day, no signup.
Email verification API
Real-time REST API with code samples in nine languages.
Catch-all email checker
Detect accept-all domains before you send.
Email existence checker
Confirm a mailbox exists without sending mail.
Disposable email detection
Block temporary and throwaway signups.
VPN and proxy detection
Spot VPNs, proxies, Tor, and datacenters.
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.
