Contact for Pricing

Defog

Name: Defog
Author: Challenging Voice

Fine-tuned language models translate natural-language questions into SQL for enterprise data teams.

3.9 Good 3.9

Bottom line: Defog is a capable data and analytics tool, best known for SQLCoder open-source model family fine-tuned specifically for text-to-SQL.

Open-source SQLCoder models can be self-hosted, avoiding vendor lock-in No published pricing; every enterprise deployment requires a sales conversation

Reviewed by Challenging Voice Editorial · Updated Aug 2026 How we rate

PricingContact for Pricing

Free planNo

CompanyDefog

PlatformsAPI, Web

Best forData and Analytics

Founded2023

Visits9

Last reviewedJul 2026

UpdatedAug 2026

Find Defog on

Ask AI about Defog ChatGPT Claude Perplexity

Overview

Defog is a data-analysis company founded in 2023 through Y Combinator's Winter 2023 batch, built by a team based in Singapore. The company focuses on one problem: converting plain-English questions into accurate SQL queries against a company's own database schema.

Its open-source SQLCoder models, released in multiple sizes from 7B to 70B parameters, are fine-tuned specifically for text-to-SQL generation and are benchmarked against GPT-4 on Defog's own sql-eval framework. Defog reports the models were trained on more than 20,000 human-curated question-and-schema pairs, and the open-source releases have logged close to 20,000 downloads on Hugging Face.

Defog serves enterprise data and analytics teams that want natural-language querying without sending schema or query data to a third-party model provider. Pricing is not published on the website; prospective customers sign up and speak with sales for a quote, with enterprise contracts including custom SLAs and data-processing agreements.

Key features

SQLCoder open-source model family fine-tuned specifically for text-to-SQL
Multiple model sizes (7B to 70B parameters) for different latency and accuracy needs
sql-eval benchmark framework for testing SQL-generation accuracy against schemas
On-premises or private-cloud deployment options for schema privacy
Metadata-only fine-tuning approach designed to avoid exposing underlying row data
Enterprise SLAs and data-processing agreements for regulated deployments

Screenshots & demo

Demo video

Screenshots

Pricing

Defog uses custom pricing. Contact their team for a quote based on your needs.

Pricing modelContact for Pricing
Starting priceCustom
Free planNo

Visit Defog

Pricing is provided as a guide. Check the official site for the latest plans.

Pros & cons

Pros

Open-source SQLCoder models can be self-hosted, avoiding vendor lock-in
Benchmarked accuracy claims are backed by a public sql-eval framework rather than marketing copy alone
Metadata-only fine-tuning limits how much sensitive data the model sees during setup
Y Combinator-backed with a narrow, well-defined product focus

Cons

No published pricing; every enterprise deployment requires a sales conversation
Small team based primarily in Singapore, which may affect support hours for other regions
Self-hosting the open-source models requires in-house ML infrastructure expertise
Narrow focus on text-to-SQL means broader BI or dashboarding needs a separate tool

How it compares

Tool	Rating	Free	From	Best known for
Defog (this tool)	3.9	No	—	SQLCoder open-source model family fine-tuned specifically for text-to-SQL
Google Looker	4.3	No	—	LookML semantic modeling layer for governed metric definitions
Formula Bot	4.3	Yes	$18/mo	Generates standard spreadsheet formulas from plain English
Sisense	4.2	No	$25/mo	Purpose-built for embedding analytics inside other software products

Our verdict

3.9 / 5 3.9

Defog is a solid data and analytics tool, best known for SQLCoder open-source model family fine-tuned specifically for text-to-SQL.

What makes it different: Defog stands out for SQLCoder open-source model family fine-tuned specifically for text-to-SQL.

How we score it

Overall 3.9

Value for money 4.2

Feature depth 4.9

Popularity 3.7

Best for ProfessionalsTeamsCreatorsCurious learners

Frequently asked questions

What is Defog?

Defog is a data and analytics tool listed in the Challenging Voice directory. Fine-tuned language models translate natural-language questions into SQL for enterprise data teams.

Is Defog free?

Defog does not offer a free plan.

What are the best Defog alternatives?

Popular alternatives to Defog include Axion, Celonis, and CitySwift. Browse them all in the Data and Analytics category.

Is Defog any good?

Defog scores 3.9 out of 5 based on our editorial review.