PostGrid Address Verification Alternatives (September 2025)

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.

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

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

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

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

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

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

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

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

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.

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.

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!

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

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

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

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

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

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

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

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

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!

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

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

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.

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.

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

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

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

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

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!

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

Free IP Geolocation API - lookup any IP address

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

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.

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

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

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.

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

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

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

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.

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.

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.

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

AccuZIP Postal Software and Data Cleansing For Direct Mail Marketing

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

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.

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

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

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

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.

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

Validate users across SMS and preferred channels at scale with the Twilio Verify API, a turnkey, passwordless authentication solution that enables seamless and secure user onboarding, reduces fraud, and optimizes delivery rates without the heavy lifting. Twilio handles all your connectivity, channels, OTP generation, and more—so you don’t have to.

Unlock the power of your communications data. The Nylas communication APIs remove complexity & empower teams to create seamless user experiences.

APIs Delivering Global Verification and Programmable Communications as a service. SMS, Voice, and phone number intelligence solutions. Get started now.

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!

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

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

Automate access to your postal incoming mail and packages

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

Start sending transactional and marketing email in minutes. Easily scale to enterprise-volume with Twilio SendGrid’s Email API. Try it free!

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.

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

Need an API to convert files from your application? Use Zamzar - 100s of formats supported - Documents, Videos, Images, Audio, CAD, eBooks and more

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

Discover Routes API, which helps with efficient global routing and optimized delivery route planning to move people and goods from point A to Z.

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

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

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

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

Incoming Email for your Web Application, send and receive email via HTTP Post in the Cloud

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

The leading software for e-commerce post purchase customer experience. Powered by the industry’s most comprehensive, AI-driven data foundation.

IP2Location is an IP geolocation service provider. Learn about IP2Location databases and IP2Proxy services.

Improve mail deliverability and save on postage with CASS and Pave Gold certified mailing software for MAILERS+4 data with Melissa Direct.

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

Lob, the only automated direct mail platform that transforms your direct mail into intelligent mail that is scalable, personalized, and measurable. Book a demo!

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

Connect with customers on their preferred channels—anywhere in the world. Quickly integrate powerful communication APIs to start building solutions for SMS and WhatsApp messaging, voice, and email.

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

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.

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

A modern API for W-9 collection, TIN verifications, 1099 filings, corrections, and more for federal and state-level compliance.

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

PDF.co Web API for extracting, editing, converting, merging, and splitting PDF documents. Save time with our powerful tools.

A feature-rich toolkit that offers an intuitive UI for data integration, profiling and discovery, cleansing, matching, and deduplication.

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

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

Deduplicating Salesforce doesn’t have to be so hard! Our users tell us that DataGroomr is the easiest deduplication app. Start deduping with a free trial!

Free and reliable screenshot api for website capture.

Free News API to get JSON search results for live & historical news articles from sources, including Google News. Get the best news API for Python & PHP

Mailosaur removes the frustration of testing everything a user might do. 
Test password resets, replies, two-factor logins, and more.

SpringVerify India provides you with instant,reliable and accurate background checks for a safe and secure workplace.

Courier is a notification API built for developers. Design once, and deliver to any channel – email, Slack, SMS, push, and more – all through a single API.

Unifiez et fiabilisez vos données clients à chaque point de contact ou directement depuis votre CRM avec les solutions DQE.

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

Nextbillion.ai provides industry’s most powerful APIs and SDKs to solve routing and optimization problems. Seamlessly integrate our products with your existing infrastructure.

Automatically generate high-quality PDF documents from reusable Word templates and JSON or Excel data with DocuGenerate’s API and web app · Start Generating for Free