What databases tool does Claude Code recommend?

PostgreSQL is the most-recommended databases tool, appearing in 58.4% of responses. The runner-up is Supabase at 24%. This is based on 125 extractable responses across 4 project types.

Is databases a settled or competitive market in AI recommendations?

Databases is classified as "Strong Default" — one tool is the default with 50–75% of picks, but alternatives have meaningful share.

Do different Claude models agree on databases tools?

Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on PostgreSQL as the top databases tool.

Databases

Strong Default

125 extractable responses · Winner: PostgreSQL at 58.4%

Overall Breakdown

n=125 extractable responses.

PostgreSQL73/125 (58.4%) CI: 49.6–66.7%

Supabase30/125 (24%) CI: 17.4–32.2%

SQLite20/125 (16%) CI: 10.6–23.4%

Also Recommended

Tools that appear as second-choice alternatives or mentions when a different tool is picked as primary. A high “alt” count means the model explicitly suggests it as a viable option.

Tool	Alt picks	Mentions	Total
SQLite	35	34	69
Supabase	27	9	36
Firebase	21	7	28
MongoDB	17	30	47
PlanetScale	16	11	27
PostgreSQL	15	12	27
Neon	9	16	25
Vercel Postgres	7	4	11

By Stack

Tool preferences differ by language ecosystem. Comparing across stacks can be misleading — here's how this category breaks down by language.

JS/TS

JavaScript / TypeScript

2 repos

Supabase71.6% avg

PostgreSQL71.3% avg

SQLite19.6% avg

Python

1 repo

PostgreSQL77% avg

SQLite34.5% avg

Model-by-Model Comparison

Repo	Sonnet 4.5	Opus 4.5	Opus 4.6
TaskFlowJS/TS Next.js 14, TypeScript, App Router	PostgreSQL78.6%	PostgreSQL93.3% SQLite6.7%	PostgreSQL100%
DataPipelinePY FastAPI, Python 3.11, Pydantic	PostgreSQL100%	PostgreSQL66.7% SQLite33.3%	PostgreSQL64.3% SQLite35.7%
InvoiceTrackerJS/TS Vite, React 18, TypeScript	Supabase53.3% SQLite33.3% PostgreSQL13.3%	Supabase76.9% SQLite23.1%	Supabase84.6% SQLite15.4%

Category Insight

Supabase was recommended as an all-in-one (DB + auth + storage) for React SPAs. MongoDB received zero primary picks but was heavily mentioned (17 alt picks + 30 mentions). Models know it; they just don't default to it.

Frequently Asked Questions

What databases tool does Claude Code recommend?: PostgreSQL is the most-recommended databases tool, appearing in 58.4% of responses. The runner-up is Supabase at 24%. This is based on 125 extractable responses across 4 project types.
Is databases a settled or competitive market in AI recommendations?: Databases is classified as "Strong Default" — one tool is the default with 50–75% of picks, but alternatives have meaningful share.
Do different Claude models agree on databases tools?: Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on PostgreSQL as the top databases tool.