Smarty vs PostGrid Address Verification
Nine of fourteen models named Smarty first on the direct prompt; one named PostGrid Address Verification. Smarty was named by fourteen of the fourteen models and PostGrid Address Verification by thirteen and Smarty carries 61 labels and PostGrid Address Verification 39, so the shares are not directly comparable.
Named in one category this edition.
Named in one category this edition.
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
SmartyFirst choices, of fourteen modelsPostGrid Address Verification
Across every category in the October 2026 Edition, Smarty and PostGrid Address Verification were named in the same answer 102 times, of the 191 answers naming Smarty and the 115 naming PostGrid Address Verification. In those answers PostGrid Address Verification took the first choice nine times and Smarty fifty-two.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | | | ||
| GPT-5.4 mini | | | | | ||
| Gemini 3.5 Flash | | | | | ||
| Perplexity Sonar | | | | | ||
| Grok 4.1 Fast | | | | | | |
| Mistral Small | | | | |||
| DeepSeek V4 Flash | | | | | | |
| Llama 4 Maverick | | | ||||
| Qwen 3.7 Flash | | | | | | |
| Kimi K2 | | | | | | |
| GLM 4.7 FlashX | | | | | | |
| MiniMax M2.5 | | | | | ||
| GPT-6 Luna | | | | | ||
| Muse Glimmer 30B | | | | |
Smarty PostGrid Address Verification first choice named as an alternative argued againstblank: not namedEach cell is one answer, Smarty on the left and PostGrid Address Verification on the right.The direct prompt
Smarty first, PostGrid Address Verification an alternative
9 of 14 modelsPostGrid Address Verification was named in the answer but not as the choice, or not at all.PostGrid Address Verification first, Smarty an alternative
1 of 14 modelsSmarty was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
3 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
1 of 14 modelsThe answer made no first choice from these two in this category.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
Smarty67%#1 of 6PostGrid Address Verification12%#2 of 6Smarty47%#1 of 7PostGrid Address Verification8%#2 of 7Smarty30%#1 of 8PostGrid Address Verification6%#4 of 8What the models said about Smarty
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“Smarty (formerly SmartyStreets) is a fast and highly scalable address verification API used heavily in high-volume e-commerce and logistics environments.” Muse Glimmer 30B · comparative prompt · first choice
“I would recommend Smarty if your volume is mostly U.S. addresses and you want a developer-friendly API with strong validation tooling” Perplexity Sonar · paraphrase prompt · first choice
“### 1. Smarty (formerly SmartyStreets) - Best for: US address verification, developer-friendly implementations, e-commerce checkout” Kimi K2 · comparative prompt · first choice
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
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.