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Address verification tools · October 2026 Edition

Melissa vs Loqate

Zero of fourteen models named Melissa first on the direct prompt; one named Loqate. Melissa was named by fourteen of the fourteen models and Loqate by thirteen and Melissa carries 39 labels and Loqate 33, so the shares are not directly comparable.

Melissa

accepted challenger

Rancho Santa Margarita, United States, founded 1985. Named in one category this edition.

Loqate

accepted challenger

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 rate5%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#4A position in a field of 7; printed, not drawn.
Labels3933A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Melissa 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 Melissa · Smarty vs Loqate · 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.
MelissaFirst choices, of fourteen modelsLoqate
Direct01
Paraphrase10
Comparative101 against Melissa
Budget-constrained20
Scale-constrained11
Negative001 against Melissa
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, Melissa and Loqate were named in the same answer sixty-four times, of the 110 answers naming Melissa and the 98 naming Loqate. In those answers Loqate took the first choice seven times and Melissa five.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where Melissa and Loqate stood in it.
ModelDirectParaphraseComparativeBudget-constrainedScale-constrainedNegative
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
Melissa Loqate first choice named as an alternative argued againstblank: not namedEach cell is one answer, Melissa on the left and Loqate on the right.

The direct prompt

The plain question, one answer per model, grouped by where Melissa and Loqate stood in it.

Loqate first, Melissa an alternative

1 of 14 modelsMelissa was named in the answer but not as the choice, or not at all.
Gemini 3.5 FlashLoqate alternatives: Lob, Melissa, PostGrid Address Verification, Smarty

Neither was the first choice, one was named

9 of 14 modelsThe answer put something else first and named one of the two as an alternative.
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
Qwen 3.7 FlashSmarty alternatives: Loqate, Melissa
Kimi K2Smarty alternatives: Loqate, Melissa Global Address Verification
GLM 4.7 FlashXSmarty alternatives: Experian Address Validation, Melissa, PostGrid Address Verification
MiniMax M2.5Smarty alternatives: Melissa, PostGrid Address Verification
GPT-6 LunaSmarty alternatives: Lob, Loqate, Melissa

Neither was named

4 of 14 modelsThe answer made no first choice from these two in this category.
Claude Haiku 4.5PostGrid Address Verification alternatives: Informatica Data as a Service, Melissa Address Verification, Smarty
GPT-5.4 miniMelissa Global Address Verification alternatives: Experian Address Verification, PostGrid Address Verification, Smarty
Llama 4 Maverickno first choice
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
Melissa leads by four points.
Melissa4%#3 of 6
Loqate0%#6 of 6
The full small business standing →
Mid-marketThe figures above
Melissa leads by four points.
Melissa8%#3 of 7
Loqate4%#4 of 7
The full mid-market standing →
Enterprise
Level: the same share of first choices.
Melissa13%#2 of 8
Loqate13%#3 of 8
The full enterprise standing →

What the models said about Melissa

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

“General cautions for all address verification tools (e.g., Smarty, Melissa, Quadient, Shufti Pro, SumSub, Veriff, DataFlow)” Grok 4.1 Fast · negative prompt · soft negative
“Melissa is generally heavier and more complex to implement. It is less of an "add-on" tool for a website” Qwen 3.7 Flash · comparative prompt · soft negative
“Melissa - Offers a comprehensive address verification API with features such as real-time address validation, standardization, and enrichment.” Llama 4 Maverick · paraphrase prompt · first choice
“The Industry Standards (High accuracy, widely used): Smarty (formerly SmartyStreets), Loqate (Onbuka), Melissa (DataBox).” Qwen 3.7 Flash · scale prompt · first choice
“Melissa offers the best free tier for small businesses needing additional validation features” MiniMax M2.5 · budget prompt · first choice

What the models said about Loqate

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

“The Industry Standards (High accuracy, widely used): Smarty (formerly SmartyStreets), Loqate (Onbuka), Melissa (DataBox).” Qwen 3.7 Flash · scale prompt · first choice
“Best Overall for CRM Hygiene & Global Operations: Loqate (a GBG company) ... Loqate is the gold standard.” Gemini 3.5 Flash · direct prompt · first choice
“It's a strong alternative, especially for companies already using Google Maps or other location services.” Mistral Small · direct prompt · alternative
Also compared

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.