# Address verification tools for small business buyers: what AI models recommend, October 2026

Gane Index, October 2026 Edition. Asked as "address verification tool" and as "address validation API", six framings each, to fourteen models with search on, on behalf of a small B2B company. Added to the October 2026 Edition on October 4, 2026. Page: https://www.gane.ai/index/gtm/gtm-data/address-verification/2026-10/smb

This is the permanent record of the October 2026 Edition, published October 1, 2026 and superseded since. The current standing: https://www.gane.ai/index/gtm/gtm-data/address-verification/smb/index.md

**Standing:** Smarty leads with 67% of first choices; verdict clear leader. 52 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [Smarty](https://www.gane.ai/index/gtm/vendors/smarty/index.md) | 67% | 0% | 67 |
| 2 | [PostGrid Address Verification](https://www.gane.ai/index/gtm/vendors/postgrid-address-verification/index.md) | 12% | 0% | 36 |
| 3 | [Melissa Global Address Verification](https://www.gane.ai/index/gtm/vendors/melissa-global-address-verification/index.md) | 6% | 11% | 45 |
| 4 | [Google Address Validation API](https://www.gane.ai/index/gtm/vendors/google-address-validation-api/index.md) | 4% | 26% | 23 |
| 11 | [Lob](https://www.gane.ai/index/gtm/vendors/lob/index.md) | 0% | 0% | 20 |
| 12 | [Loqate](https://www.gane.ai/index/gtm/vendors/loqate/index.md) | 0% | 14% | 29 |
| 17 | [Experian Address Validation](https://www.gane.ai/index/gtm/vendors/experian-address-validation/index.md) | 0% | 27% | 11 |

Rank is by share of first choices among all 72 products named; products with the same share are tied, and the order among them carries no meaning. The table lists those with at least 10 labels.

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: Smarty; alternatives Experian Address Verification, PostGrid Address Verification
- GPT-5.4 mini: Smarty; alternatives Melissa Global Address Verification, USPS Address Validation API
- Gemini 3.5 Flash: PostGrid Address Verification, Smarty; alternatives Lob
- Perplexity Sonar: Smarty; alternatives Melissa Global Address Verification
- Grok 4.20: Smarty; alternatives Melissa Global Address Verification, PostGrid Address Verification
- Mistral Small: Smarty
- DeepSeek V4 Flash: Smarty; alternatives Lob, PostGrid Address Verification
- Llama 4 Maverick: no first choice
- Qwen 3.7 Flash: Melissa Global Address Verification, Smarty; alternatives Loqate
- Kimi K2: Smarty; alternatives Loqate, Melissa Global Address Verification
- GLM 4.7 FlashX: PostGrid Address Verification, Smarty; alternatives Data8, Google Maps Address Validation API
- MiniMax M2.5: Smarty; alternatives Loqate, Melissa Global Address Verification
- GPT-6 Luna: Smarty; alternatives Loqate, Melissa Global Address Verification
- Muse Glimmer 30B: Smarty; alternatives Melissa Global Address Verification, PostGrid Address Verification, Postcoder

## Sources the answers cite

76 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- smarty.com: 56 answers, 129 citations
- g2.com: 45 answers, 82 citations
- guideflow.com: 45 answers, 45 citations
- melissa.com: 42 answers, 60 citations
- postgrid.com: 30 answers, 49 citations
- opencart.com: 29 answers, 29 citations
- getapp.com: 21 answers, 22 citations
- thectoclub.com: 19 answers, 19 citations

Pages named in the most answers:

- https://guideflow.com/blog/address-verification-software (45 answers)
- https://g2.com/categories/address-verification/small-business (28 answers)
- https://melissa.com/address-experts/best-address-verification-apis-complete-comparison (25 answers)
- https://opencart.com/blog/top-12-address-verification-apis-and-software-compared-for-2026?page=4 (24 answers)
- https://smarty.com/compare/google-address-validation-alternatives (22 answers)
- https://thectoclub.com/tools/best-address-verification-software (19 answers)
- https://apollotechnical.com/address-verification-apis-for-saas-and-b2b-marketing-teams (18 answers)
- https://findarticles.com/address-verification-software-12-tools-compared-for-accuracy-api-quality-and-global-coverage (18 answers)
- https://softwareadvice.com/address-verification (17 answers)
- https://batchdata.io/blog/best-address-verification-apis-2026-complete-comparison-guide (15 answers)

## Warned against

- Google Address Validation API: 6 of 23 labels negative. "Google Address Validation if you need strong parsing, standardization, or true address verification, because Melissa says Google does not parse, standardize, validate" (Perplexity Sonar, negative prompt)
- Melissa Global Address Verification: 5 of 45 labels negative. "Best for comprehensive global coverage and certification depth ... but can be more enterprise-oriented in pricing." (DeepSeek V4 Flash, scale prompt)
- Experian Address Validation: 3 of 11 labels negative. "Enterprise-only suites such as Informatica and Experian when your need is straightforward checkout or shipping validation" (Perplexity Sonar, negative prompt)
- Loqate: 4 of 29 labels negative. "more expensive and slower to see ROI than Smarty—not ideal for a small business just starting out" (DeepSeek V4 Flash, paraphrase prompt)

## Record

- Method: https://www.gane.ai/index/gtm/methodology
- License: CC BY 4.0. Cite as Gane Index, October 2026 Edition, www.gane.ai/index/gtm.