PostGrid Address Verification vs Lob
One of fourteen models named PostGrid Address Verification first on the direct prompt; zero named Lob. PostGrid Address Verification was named by thirteen of the fourteen models and Lob by ten and PostGrid Address Verification carries 50 labels and Lob 23, so the shares are not directly comparable.
Named in one category this edition.
Named in three categories 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
PostGrid Address VerificationFirst choices, of fourteen modelsLob
Across every category in the November 2026 Edition, PostGrid Address Verification and Lob were named in the same answer forty-nine times, of the 138 answers naming PostGrid Address Verification and the 330 naming Lob. In those answers Lob took the first choice zero times and PostGrid Address Verification eight.
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 4.20 | | | | | | |
| 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 | | | | |
PostGrid Address Verification Lob first choice named as an alternative argued againstblank: not namedEach cell is one answer, PostGrid Address Verification on the left and Lob on the right.The direct prompt
PostGrid Address Verification first, Lob not the choice
1 of 14 modelsLob was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
11 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
2 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
PostGrid Address Verification14%#2 of 6Lob0%#4 of 6PostGrid Address Verification10%#2 of 7Lob2%#4 of 7PostGrid Address Verification18%#3 of 7Lob0%#7 of 7What the models said about PostGrid Address Verification
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“PostGrid offers comprehensive address verification services with the following characteristics: Global coverage across 250+ countries and territories” MiniMax M2.5 · comparative prompt · first choice
“Rating: 5.0/5 (28 reviews)... Best For: Enterprise-scale address verification with developer support and native integrations.” Mistral Small · comparative prompt · first choice
“PostGrid Address Verification is best for cost-efficient, API-first address validation for mid-market teams” Claude Haiku 4.5 · direct prompt · first choice
What the models said about Lob
No label in this category carried a quote.
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.