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

Gane Index, November 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 November 2026 Edition. Page: https://www.gane.ai/index/gtm/gtm-data/address-verification/smb

**Standing:** Smarty leads with 78% of first choices; verdict clear leader. 49 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) | 78% | 4% | 67 |
| 2 | [PostGrid Address Verification](https://www.gane.ai/index/gtm/vendors/postgrid-address-verification/index.md) | 14% | 2% | 46 |
| 7 | [Melissa Global Address Verification](https://www.gane.ai/index/gtm/vendors/melissa-global-address-verification/index.md) | 0% | 20% | 40 |
| 8 | [Lob](https://www.gane.ai/index/gtm/vendors/lob/index.md) | 0% | 4% | 23 |
| 9 | [Loqate](https://www.gane.ai/index/gtm/vendors/loqate/index.md) | 0% | 17% | 30 |
| 10 | [Google Address Validation API](https://www.gane.ai/index/gtm/vendors/google-address-validation-api/index.md) | 0% | 23% | 22 |

Rank is by share of first choices among all 81 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 Validation, PostGrid Address Verification
- GPT-5.4 mini: Smarty; alternatives Data8, Melissa Global Address Verification, PostGrid Address Verification, Postcoder
- Gemini 3.5 Flash: Smarty; alternatives Lob, Loqate, Melissa Global Address Verification, PostGrid Address Verification
- Perplexity Sonar: Smarty; alternatives Loqate, Melissa Global Address Verification, PostGrid Address Verification
- Grok 4.20: Smarty; alternatives GeoPostcodes, Melissa Global Address Verification, PostGrid Address Verification
- Mistral Small: Smarty; alternatives Melissa Global Address Verification, PostGrid Address Verification
- DeepSeek V4 Flash: Smarty; alternatives Lob, PostGrid Address Verification
- Llama 4 Maverick: Smarty; alternatives Loqate, Melissa Global Address Verification, PostGrid Address Verification
- Qwen 3.7 Flash: Smarty; alternatives HubSpot Breeze Intelligence, Loqate, Resend.ai
- Kimi K2: Smarty; alternatives Addressfinder, PostGrid Address Verification
- GLM 4.7 FlashX: Smarty; alternatives PostGrid Address Verification
- MiniMax M2.5: PostGrid Address Verification, Smarty; alternatives Lob, Melissa Global Address Verification
- GPT-6 Luna: Smarty; alternatives Loqate, Melissa Global Address Verification
- Muse Glimmer 30B: PostGrid Address Verification, Smarty

## Sources the answers cite

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

- g2.com: 48 answers, 83 citations
- capterra.com: 36 answers, 46 citations
- smarty.com: 34 answers, 65 citations
- softwareadvice.com: 33 answers, 35 citations
- softwareadvice.co.uk: 26 answers, 26 citations
- loqate.com: 23 answers, 43 citations
- getapp.com: 23 answers, 23 citations
- digi-texx.com: 22 answers, 22 citations

Pages named in the most answers:

- https://g2.com/articles/best-address-verification-software (30 answers)
- https://softwareadvice.co.uk/directory/4463/address-verification/software (26 answers)
- https://softwareadvice.com/address-verification/small-business (24 answers)
- https://digi-texx.com/techblog/address-validation-software (22 answers)
- https://capterra.com/address-verification-software (21 answers)
- https://g2.com/categories/address-verification/small-business (19 answers)
- https://capterra.co.uk/directory/33215/address-verification/software (17 answers)
- https://getapp.com/all-software/address-verification/org/small-business (17 answers)
- https://guideflow.com/blog/address-verification-software (13 answers)
- https://capterra.com/address-verification-software/features/api (11 answers)

## Warned against

- Melissa Global Address Verification: 8 of 40 labels negative. "Avoids the high costs of enterprise tools (e.g., Melissa or Loqate, which can start at $100+/month or require volume commitments)" (Grok 4.20, budget prompt)
- Google Maps: 4 of 4 labels negative. "Google Maps or basic geocoding APIs used as the sole verifier. They can locate or format an address without proving that it exists, is deliverable, or belongs to the customer." (Perplexity Sonar, negative prompt)
- Google Address Validation API: 5 of 22 labels negative. "Free/open-source options (e.g., basic Google Address Validation) lack depth, support, or compliance certifications." (Grok 4.20, comparative prompt)
- Loqate: 5 of 30 labels negative. "Loqate — Enterprise-focused; pricing not transparent, often expensive for small volume" (Kimi K2, paraphrase prompt)

## Movement since October 2026

Floor: 11 points of share, measured on the calibration repeat.
Same leader: Smarty at 78%.

- Smarty: 67% to 78%, +11. Inside the floor by 0 points · rank 1 of 81, unchanged.
- Melissa Global Address Verification: 6% to 0%, −6. Inside the floor by 5 points · rank 3 → 7 of 81.
- Google Address Validation API: 4% to 0%, −4. Inside the floor by 7 points · rank 4 → 10 of 81.
- PostGrid Address Verification: 12% to 14%, +2. Inside the floor by 9 points · rank 2 of 81, unchanged.
- Lob: 0% to 0%, ±0. Inside the floor by 11 points · rank 11 → 8 of 81.
- Loqate: 0% to 0%, ±0. Inside the floor by 11 points · rank 12 → 9 of 81.
- Experian Address Validation: 0% to 0%, ±0. Inside the floor by 11 points · rank 17 → 77 of 81.

## Record

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