Smarty Alternatives (September 2025)

Address Verification for USPS & International Addresses. Try our easy-to-use APIs, list processing tools and more.

Verify/Validate Addresses using PostGrid’s CASS (USPS) and SERP (Canada Post) certified Address validation and verification API and services.

With our free postal address verification and international address validation service you can easily verify if any USPS or international postal address is valid and deliverable.

Melissa’s address verification systems standardize your US, Canada and International postal addresses – CASS and SERP Certified.

Improve data quality by capturing correct UK addresses. Boost conversions and user experience with postcode address verification and geocoding technology.

Postcoder is the API for address lookup & form validation. Improve your conversion rates and capture better quality customer data.

Improve domain reputation and increase the quality of your mailing list by validating emails before sending a campaign, or at the point of capture.

Verify your email list in minutes, or integrate real-time email verification into your app with our API. Over 18 billion emails verified. Get started for free.

The most accurate email validator algorithm to identify and remove bad email addresses. Best sales starts with a better email deliverability. Enjoy a free trial.

Improve your email sender reputation and reduce bounce rates: real-time email validation API and bulk email list cleaning. Free trial & 100% accuracy.

Customer Data: Verified · Fast, accurate and intuitive data verification software to help businesses work smarter. · Address Auto-Complete · UK Postcode Lookup.

Optimize your email strategy with ZeroBounce. We offer top-tier email validation, list cleaning, and address verification to reduce spam traps and enhance deliverability.

Reduce bounce rates, stop fake sign-ups and combat fraud with award-winning email verification solutions. Real-time API or batch file options available.

Bulk email verifier. Get rid of spam traps, bounces,and disposable emails. Start with 100 FREE email validations! Secure & accurate bulk email validation

Email Validation and Verification, Email Checker and Bulk Verify Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.

With our real-time phone number validation service you can easily verify if a phone number is real and valid. We also offer Phone Number List Cleaning and an Online API for Phone Number Validation.

Free real-time email verification service. Easy to use. Start using in 30 seconds

Check Email Address Online using our Email Verification Service ⚡ Proofy.io ⚡ First 500 checks for free! 👨 Check if an Email address is valid or not

Improve your email deliverability with Bouncer's robust email verification and deliverability platform. 🌐

Unlock intelligence about the person behind the email address with email validation, data enrichment, identity matching, and fraud protection.

Accurate real-time email validation service: upload and clean your list or integrate email verification into your app with our API. Get started for FREE!

Email checker online tool. Ensure email accuracy with our efficient tool. Verify email addresses instantly and improve your communication reliability. Try for free!

Improve domain reputation and increase the quality of your mailing list by validating emails before sending a campaign, or at the point of capture.

PlaceKit is a worldwide geocoding API providing fast and accurate address autocomplete, store locator, and two-way geocoding for your app.

MailboxValidator email validation clean email lists and reduces bounce. It connects to the mail server and checks whether the mailbox exists or not.

With the Gamalogic Email validation API tool, you can clean your email list and lower your bounce rate during email campaigns. Try it for free today!

The Most Comprehensive Email Verification Service from only $59: Email Checker, Email List Verify, Bulk Email Verifier, ESP Integrations, and Automatic Email Verification

Bouncify is a Leading provider of bulk email list cleaning and email verification service. Run our bulk email verification tool through your list of emails to remove hard bounces and keep your mailing list clean and engaged with 99% accuracy. We provide email list validation to marketers from all countries.

The most accurate bulk email checker. Complete email address verification in seconds. Clear lists with online mail checker for free.

Email Address Validation and Email List Cleaning Service reduces bounce rates. Quick Email Verification Service is the right platform to verify email list and improve deliverability.

Mailcheck is an easy-to-use, fast, and efficient email validation tool with an API integration feature for on-the-go validation.

Affordable Google Maps alternative for Reverse Geocoding, Geocoding, Maps and Routing APIs. Generous free tier, offering Enterprise-grade APIs for everyone!

Get rid of spam traps, bounces, disposable or catch-all emails with bulk email verifier or real-time API. Start with 100 FREE email verifications!

Keep your email list clean with our bulk email verification service. Verify daily 100 email address for free and avoid sending emails to spam / invalid account.

The powerful email verification tool helps you validate and clean your email list seamlessly, ensuring verified email subscribers and high deliverability.

Free IP Geolocation API, the most accurate data, use our API to quickly and easily integrate the location of visitors into your script or website.

Use Our Data Quality Suite to standardize, verify and correct all your contact data: postal address, email address, phone number and names.

Free IP Geolocation API - lookup any IP address

Scrubby is the only complete email validation tool that goes beyond standard SMTP validation, uniquely incorporating risky and catch-all email checks to provide complete validation, ensuring an impressive 98% deliverability for your entire list.

Simple and powerful email verification JSON API using SMTP, typo checks, syntax validation, and free and disposable provider filtering. Free for personal use.

Get the best email validation tool for busy businesses. Fully automated, completely hands-off, this email verification tool does it all for you.

Free IP Geolocation API and Accurate IP Database provides country, city, zip code, ISP data in REST JSON and XML format from any IPv4 and IPv6 Address.

Lookup the location of any IP Address with ipdata's IP Geolocation API. ipdata is fast, accurate and is used by 20,000+ developers.

If you want excellent email deliverability, our services are highly dependable. Reach out to us for bounce checker and hunter email.

EasyPost's best-in-class Shipping APIs provide end-to-end flexibility and more control over parcel shipping and logistics processes for anyone shipping online.

GeoPostcodes provides the world’s most comprehensive postal/zip code database. Complete, accurate, always up-to-date and enterprise-ready.

Experience the power of Listclean: the simple, AI-driven email verification service with unparalleled accuracy. 100 verifications free. Start trial today!

IP geolocation and network data from the creator of GeoIP. Download and host the data locally to eliminate network latency and per-query charges.

Get accurate IP address information with IPinfo. Trusted by 400,000+ users, we handle more than 40 billion API requests monthly. Sign up for free account today.

Webbula offers email hygiene, email verification, and data appends solutions to help you clean and grow your email database.

Integrate in minutes and send transactional emails via our REST API or SMTP. Scale with our reliable global infrastructure and deliver emails to your customer's inbox instantly.

SMTP email relay service that is powerful, secured and reliable. Send better transactional emails and integrate easily with our email API.

Enhance digital journeys with Woosmap's easy-to-integrate location APIs, SDKs, and widgets for web and mobile applications.

Discover the owner of any email address with our advanced reverse email lookup service. Instantly find the full name and public records of email owners. Try our powerful email address search tool now!

Abstract provides powerful APIs to help you enrich any user experience or automate any workflow. Used by 10,000+ developers worldwide.

Test new user signups, transactional emails, spam scores, and more. Get started on our free forever plan with unlimited email addresses and mailboxes.

IP Geolocation API - Our global IP address data helps companies to make intelligent & programmatic decisions.

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

Everything you need for more successful email delivery and performance management, from simple sending tools to deeply informative reporting.

Digital Element delivers the most accurate and comprehensive IP geolocation and intelligence database in the world. Find out more here.

Verify Email Addresses Effectively ✔️ Keep Your Mailing Lists Up-to-date With Email Validation Tool ➡️ Get A Free Trial for 7 days

Shippo is the best multi-carrier shipping software for e-commerce businesses. Find the best shipping rates, integrate with e-commerce platforms, print shipping labels, track package delivery, and verify addresses with either our shipping API or web app.

Send your Transactional and marketing Emails safely, track your results and use powerful APIs designed for devolopers by developers. Try for free

Email API and SMTP relay to not just send and measure email sending, but also alert and optimise. We provide you with tools, expertise and support needed to reliably deliver emails to your customers inboxes on time, every time.

Email on Acid is the leading email pre-deployment checklist and a configurable part of your email marketing workflow, from accessibility checks to email previews.

Uncover User Locations with Precision using ipstack - Discover Real-time IP Geolocation Data with location JSON API. Elevate your websites insights now!

Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!

A company, a first and last names are enough to find an updated and verified email address. All the email addresses enriched by Dropcontact are 98% valid.

Clearout is a powerful platform that offers email validation, email finder and prospecting services to help businesses find potential customers.

AccuZIP Postal Software and Data Cleansing For Direct Mail Marketing

World’s Most Expressive API for building Disruptive Prop-Tech.

Sales, marketing, and recruiting professionals use our tools to find emails, verify emails, and buy email lists. 98% accuracy. Get 50 leads for free.

AI-Powered Intelligent Document Processing, IDP, Document Collection, eSignatures, ID Verification for Secure and Compliant Customer Processes

Automate data extraction, validation & review from unstructured documents with 99% accuracy. Get 10 times more efficient at processing various documents with Docsumo's IDP solution and custom-made APIs.

Extract OCR text, data, handwriting, photos, and signatures from all types of documents, including IDs, driver licenses, passports, visas, receipts, invoices, forms, and thousands of other document types worldwide.

Create smart digital certificates, badges & credentials with Hyperstack that you can share, manage, verify, control its privacy, design & deploy in minutes.

Clean your email list with Mailercheck's email verification tool and improve deliverability with our email testing suite to boost email marketing ROI.

Ocrolus' advanced Document AI platform is designed to accelerate financial decision-making. Leverage the power of AI to transform unstructured documents into actionable insights, facilitating faster and more precise analysis for enhanced efficiency and accuracy.

Best at verifying emails that are catch-all or protected by SEGs (Secure Email Gateway). Single email verifications are free and unlimited.

IDMERIT provides fast and accurate Digital Verification. Identity Verification Solutions helps verifying your customers Online and Keeps your business safe, secure and compliant while maximizing ROI with Id Verification Solutions.

Placekey is a universal place identifier trusted by organizations, businesses, and geospatial scientists to easily represent and unify location data.

AI-powered identity verification platform for end-to-end user onboarding with industry-best pass rates. Combat fraud and ensure compliance. Book a demo now!

Access our top-tier SMS gateway services at an affordable price globally. No subscriptions and full compliance. Create a free account >>

Postalytics® is direct mail automation software that sends personalized direct mail from your CRM and analyzes delivery & response.

Run over 100 tests to validate your website's domain name, DNS, SEO, Email, Accessibility, CSS and more.

Send PDF as USPS Certified mail and First Class Mail from your computer; Send from our API.

Stop paying inflated fees to clean your email lists. Use MailCleanup and clean your emails at less than half the price.

First 50 searches are FREE. Quickly find anyone's contact information for your lead research, talent acquisition, PR, or HR with our email finder!

SmartAddresser 5 is the mailing software that puts unparalleled power and control at your fingertips. From CASS Certified™ address verification and advanced deduplication technology, to powerful PAVE™ Certified Presorting and Job Scripting capabilities, there has never been an all-in-one solution to match it.

The #1-rated online postal mailing solution. Easily mail letters, postcards and more online from $0.85. Start sending mail in minutes with our HIPAA-compliant print & mail service.

Making validation faster, easier & smarter for Life Sciences. Find the world's most developed validation software solution, backed by a comprehensive, expert team and technology at Kneat.

Email delivery, perfected with Mailtinni! 💌 Your new SMTP service: fast, reliable, highly secure. 🚀

Show users intelligent search suggestions with the Bing Autosuggest API. Test out the autocomplete API and search suggestion tool to see how it works.

Authentication for currency, pharmaceuticals, fine art and identification.

GlockApps - Email Deliverability Test Experts - Get insights into your email deliverability, reputation, authentication, and DMARC compliance.

An API to convert HTML/CSS documents to PDF. PDFShift is the reliable, Up-to-date and high-fidelity conversion API with no maintenance costs.

Access our accurate and real time verified B2B database to drive growth. With built-in email verification, UpLead is the leader in high quality business contact data. Start your free 7-day trial today!

Truework provides a comprehensive income and employment verification platform for mortgage lenders, consumer lenders, and property managers.

Automate transactions like real-time eligibility checks and claims processing with developer-friendly, JSON-based APIs that support thousands of payers.