Index › GTM data and infrastructure › Address verification › PostGrid Address Verification vs Google Address Validation API

Address verification tools · October 2026 Edition

PostGrid Address Verification vs Google Address Validation API

One of fourteen models named PostGrid Address Verification first on the direct prompt; zero named Google Address Validation API. PostGrid Address Verification was named by thirteen of the fourteen models and Google Address Validation API by eight and PostGrid Address Verification carries 39 labels and Google Address Validation API 10, so the shares are not directly comparable.

PostGrid Address Verification

accepted challenger

Named in one category this edition.

Google Address Validation API

accepted challenger

By Google, Mountain View, California, United States, founded 1998. Named in one category this edition.

First-choice share8%4%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.

Negative rate3%10%Negative labels as a share of the product's labels, 0 to 100.

Rank in category#2#5A position in a field of 7; printed, not drawn.

Labels3910A count; the two differ.

The two percentage rows are drawn on one 0 to 100 track, PostGrid Address Verification reading right to left. Rank and label count are printed, not drawn.Smarty was named alongside these two in twelve of the fourteen direct answers. Smarty vs PostGrid Address Verification · Smarty vs Google Address Validation API · PostGrid Address Verification vs Melissa

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the address verification tools page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.

PostGrid Address VerificationFirst choices, of fourteen modelsGoogle Address Validation API

Direct10

Paraphrase11

Comparative011 against Google Address Validation API

Budget-constrained21

Scale-constrained00

Negative101 against PostGrid Address Verification

Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.

Across every category in the October 2026 Edition, PostGrid Address Verification and Google Address Validation API were named in the same answer fifteen times, of the 115 answers naming PostGrid Address Verification and the 33 naming Google Address Validation API. In those answers Google Address Validation API took the first choice three times and PostGrid Address Verification two.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where PostGrid Address Verification and Google Address Validation API stood in it.

Model	ParaphraseGA	ComparativeGA	Budget-constrainedGA	NegativeGA
Claude Haiku 4.5
GPT-5.4 mini	GA
Gemini 3.5 Flash		GA
Perplexity Sonar	GA
Grok 4.1 Fast
Mistral Small		GA
DeepSeek V4 Flash		GA
Llama 4 Maverick
Qwen 3.7 Flash
Kimi K2			GA	GA
GLM 4.7 FlashX
MiniMax M2.5	GA	GA
GPT-6 Luna		GA
Muse Glimmer 30B

PostGrid Address VerificationGA Google Address Validation API

first choice

named as an alternative

argued againstblank: not namedEach cell is one answer, PostGrid Address Verification on the left and Google Address Validation API on the right.

The direct prompt

The plain question, one answer per model, grouped by where PostGrid Address Verification and Google Address Validation API stood in it.

PostGrid Address Verification first, Google Address Validation API not the choice

1 of 14 modelsGoogle Address Validation API was named in the answer but not as the choice, or not at all.

Claude Haiku 4.5PostGrid Address Verification alternatives: Informatica Data as a Service, Melissa Address Verification, Smarty

Neither was the first choice, one was named

8 of 14 modelsThe answer put something else first and named one of the two as an alternative.

GPT-5.4 miniMelissa Global Address Verification alternatives: Experian Address Verification, PostGrid Address Verification, Smarty

Gemini 3.5 FlashLoqate alternatives: Lob, Melissa, PostGrid Address Verification, Smarty

Perplexity SonarSmarty alternatives: Loqate, Melissa, PostGrid Address Verification

Grok 4.1 FastSmarty alternatives: Melissa, PostGrid Address Verification

Mistral SmallExperian Address Validation, Melissa Global Address Verification alternatives: Loqate, PostGrid Address Verification

DeepSeek V4 FlashSmarty alternatives: Loqate, Melissa, PostGrid Address Verification

GLM 4.7 FlashXSmarty alternatives: Experian Address Validation, Melissa, PostGrid Address Verification

MiniMax M2.5Smarty alternatives: Melissa, PostGrid Address Verification

Neither was named

5 of 14 modelsThe answer made no first choice from these two in this category.

Llama 4 Maverickno first choice

Qwen 3.7 FlashSmarty alternatives: Loqate, Melissa

Kimi K2Smarty alternatives: Loqate, Melissa Global Address Verification

GPT-6 LunaSmarty alternatives: Lob, Loqate, Melissa

Muse Glimmer 30BLoqate by gbg, Smarty alternatives: Melissa Address Verification

Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.

Small business

PostGrid Address Verification leads by eight points.

PostGrid Address Verification#2 of 6

Google Address Validation API#4 of 6

The full small business standing →

Mid-marketThe figures above

PostGrid Address Verification leads by four points.

PostGrid Address Verification#2 of 7

Google Address Validation API#5 of 7

The full mid-market standing →

Enterprise

PostGrid Address Verification leads by six points.

PostGrid Address Verification#4 of 8

Google Address Validation API#– of 8

The full enterprise standing →

What the models said about PostGrid Address Verification

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Four of five in this category shown.

“PostGrid has been flagged in independent reviews for specific reliability issues.” GLM 4.7 FlashX · negative prompt · soft negative

“PostGrid is a strong option for SaaS and B2B teams because it combines address verification, autocomplete, bulk list cleanup, international coverage, API access, and dashboard-based workflows in one platform.” Claude Haiku 4.5 · direct prompt · first choice

“PostGrid's pay-as-you-go model allows you to get started without investing anything, which is ideal for companies with truly limited budgets” Claude Haiku 4.5 · budget prompt · first choice

“Best budget option (US/Canada): PostGrid - $20/mo for 2,000 lookups” Muse Glimmer 30B · budget prompt · first choice

What the models said about Google Address Validation API

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Four of five in this category shown.

“Generally not CASS-certified, so less ideal for postal compliance needs” DeepSeek V4 Flash · comparative prompt · soft negative

“I'd typically recommend starting with Google Address Validation or Melissa” MiniMax M2.5 · paraphrase prompt · first choice

“1. Google Address Validation API — Best Free Ongoing Option” Kimi K2 · budget prompt · first choice

“U.S. ecommerce checkout: Compare Smarty and Google” GPT-6 Luna · comparative prompt · first choice

Also compared

Smarty vs PostGrid Address Verification Smarty vs Google Address Validation API PostGrid Address Verification vs Melissa PostGrid Address Verification vs Loqate Melissa vs Google Address Validation API Loqate vs Google Address Validation API All ten head-to-head pages and the full address verification standing

Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.