Autocomplete + Verification
Address autocomplete suggests real addresses as users type. Address verification confirms entered addresses are accurate and deliverable. Together, these tools are the perfect pairing for a deeply satisfying customer experience while getting pristine data for your business.
Smarter addresses from checkout to delivery
Build trust and customer loyalty by combining autocomplete and verification
Fewer form and cart abandonments
Speed up form fills and checkout with autocomplete and keep bad addresses out with real-time verification. Less friction = more sales.
Super high delivery rates
Catch typos early with autocomplete and confirm every detail with address validation before shipping. Fewer errors, faster fulfillment, happier customers.
Clean data, no matter what
Verification keeps your addresses current despite any changes. No guesswork, just excellent targeting and consistent data for better results.
Save on your expenses
Costs from returns, reships, delays, and angry customers add up fast. Stop bad addresses at the entry with autocomplete + verification.
From suggestion to certainty
Autocomplete + verification give you precise, reliable data in 4 steps

Step 1
Type
Customers begin typing, and address autocomplete instantly suggests only real, valid addresses.

Step 2
Select
A user selects their correct address from the dropdown, down to the unit number, minimizing errors and speeding up the form.

Step 3
Verify
If a user bypasses autocomplete or edits the address, verification fixes any typos and makes sure the address is valid, deliverable, and in the right format, all in real time.

Step 4
Enrich
Get up to 55 data points per valid address for even better decision-making.
Our results
With both, you get
Better business with autocomplete + verification
Autocomplete keeps users happy with quick suggestions, while verification keeps your business running with clean, deliverable data. You need both for flawless processes from entry to delivery.
Benefit | Autocomplete | Verification |
---|---|---|
Speeding up checkout | ✅ | ❌ |
Reduce cart abandonment | ✅ | ❌ |
Reduces incorrect addresses at entry | ✅ | ❌ |
Cost savings on failed deliveries | ⚠️ Reduces incorrect addresses at entry | ✅ |
Customer satisfaction | ✅ | ✅ |
Human-error proof | ⚠️ Reduces typos and mistakes, but doesn't prevent all user errors | ✅ |
SmartyKey® | ❌ | ✅ Included with every verified address |
Together, autocomplete and address verification banish pesky typos and failed deliveries, creating a user experience your customers will find simply marvelous. This savvy one-two punch automatically boosts conversions, slashes expenses, and delivers valuable insights, all while keeping you data thrillingly accurate. |
Terrific alone; even better together
A quick-hit visual of how autocomplete and verification work better together. Share it with your teams, boss or anyone still entering addresses like it's 1999.

Use cases
See how organizations around the world are benefiting from our services
Improved checkout experience, including mobile
Address autocomplete increased customer conversion rates from 1.6% to 9.2%, depending on the country.
Address autocomplete | What it is & how to use it
Suggests validated street addresses for users as they type to streamline processes.
What is address validation/verification?
Address verification is the process of checking a mailing address against an authoritative address database.
FAQ
What is address autocomplete and verification?
What is address autocomplete and verification?
Autocomplete: As users type, Smarty suggests valid, complete addresses for fewer keystrokes, fewer typos, and faster checkout.
Verification: After an address is entered, Smarty checks it against authoritative databases to make sure it's real and deliverable. It’s great for catching missing unit numbers, invalid ZIP Codes, and other sneaky errors.
Verification: After an address is entered, Smarty checks it against authoritative databases to make sure it's real and deliverable. It’s great for catching missing unit numbers, invalid ZIP Codes, and other sneaky errors.
Which countries do you support?
Which countries do you support?
United States (including territories like Puerto Rico), as well as International coverage for 250 countries and territories.
Do you offer a free trial?
Do you offer a free trial?
Yes! No credit card required. Get a 42-day free trial to test and refine before you purchase. To start your free trial, visit our pricing page, choose the product you want, and you’ll see the free trial option right there.
How accurate is your data?
How accurate is your data?
Smarty uses USPS and other authoritative sources (including our own) to make sure we always have the most up-to-date information. For U.S. data, we’re CASS-certified by USPS for razor-sharp address accuracy.
Our machine-learning-powered matching technology also improves the accuracy of your results. We’ve fine-tuned it to handle even the messiest addresses without making things up. The result? More correct matches, fewer false positives — a “just right” solution. Even Goldilocks would approve.
Our machine-learning-powered matching technology also improves the accuracy of your results. We’ve fine-tuned it to handle even the messiest addresses without making things up. The result? More correct matches, fewer false positives — a “just right” solution. Even Goldilocks would approve.
What coding languages do you support?
What coding languages do you support?
Smarty is API-first and language-flexible. Each SDK package is open-source (Apache 2.0 License), well-tested, actively developed, and available to download and use at no charge. SDK’s available in these languages: .NET SDK (targets .NET 4.0 or above, .NET Standard 2.0, or Mono) Compatible with: C#, F#, Visual Basic .NET, or any other .NET/CLI language, Go SDK (requires Go 1.7 or above), iOS SDK (requires iOS 8.4 or above) Compatible with: Objective-C, Swift, JavaScript SDK, Java SDK (targets Java 7 or above) Compatible with: Android development Clojure, Groovy, Scala, Kotlin, or any other JVM language, PHP SDK (requires PHP 5.6+), Python SDK (compatible with Python 2.7 and Python 3.x), Ruby SDK (requires Ruby 2.0+), Rust SDK (requires Rust v1.63.0+).
What if your service is unavailable?
What if your service is unavailable?
Smarty has an industry-leading >99.999% uptime (yes, really), global redundancy, and multiple data centers. We’ve planned for the apocalypse, and status updates are available 24/7.
What counts as a billable lookup (and how to use fewer of them)?
What counts as a billable lookup (and how to use fewer of them)?
Each time the API is called counts as a billable lookup, whether for autocomplete or address verification.
Autocomplete: Every time a user types a character and the API fetches suggestions, that counts as one lookup.
Address verification: Each time you check an address against official databases, that also counts as one lookup.
To conserve autocomplete lookups, you can set the API to wait until a user types a few characters before it kicks in. Most users find their address after just 5 keystrokes, so using that as a trigger point helps you save on usage without slowing anyone down.
Autocomplete: Every time a user types a character and the API fetches suggestions, that counts as one lookup.
Address verification: Each time you check an address against official databases, that also counts as one lookup.
To conserve autocomplete lookups, you can set the API to wait until a user types a few characters before it kicks in. Most users find their address after just 5 keystrokes, so using that as a trigger point helps you save on usage without slowing anyone down.
How quickly can I get this working?
How quickly can I get this working?
Pretty quickly. Smarty’s APIs are designed to be fast, easy to integrate, and well-documented. Our SDKs are loaded with example code and examples. Developers love them. We’ve also documented best practices when working with our APIs.
Do you provide implementation support?
Do you provide implementation support?
Yes! We provide developer-approved docs, SDKs, and support from real humans (no robots here) who’ve got your back.
More FAQs
Select a category to see more information about a certain topic.