Synthetic test data from your schema, with every foreign key intact.

Stop hand-writing fixtures and patching stale seed scripts. Point SeedBase at your schema, SQL, Django, Prisma or a live database, and get foreign-key-consistent, realistic data for dev, CI and staging. Every major database, right in your browser, no signup.

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10,000 rows per generation, free · EU-hosted · zero trackers

The test data problem every developer knows.

Manual INSERTs

5 rows aren’t enough. 5,000 rows by hand is insane.

Custom Scripts

2 hours per project. Every schema change breaks everything.

Prod Dumps

“Just anonymize the prod dump.” GDPR says hi.

Migrating from Snaplet or Neosync?

Both shut down. SeedBase is hosted, maintained, bootstrapped, and you can export everything at any time. No second tool death in twelve months.

From Snaplet → From Neosync →

Generate test data from your schema in three steps.

1

Design

Paste your DDL, connect an existing database, or build your schema visually.

2

Generate

Click generate or run seedbase generate. Thousands to millions of FK-consistent rows in seconds to minutes.

3

Push

One click to your PostgreSQL, MySQL, or download as SQL / CSV / JSON.

Foreign-key-consistent test data for real databases.

FK-aware Generation

Declared foreign keys are resolved automatically. Every reference points to a real row. No dangling references.

Generate from a GitHub Repo

Connect a repository and pull the schema straight from schema.prisma, Django models or a .sql file. The project stays linked, so one click re-syncs it whenever the schema changes.

Smart Column Detection

email gets emails. first_name gets names. created_at gets timestamps. Seedbase reads your column names.

Instant Preview

See your generated data before you export. Expand any table, check the rows, adjust and regenerate.

Schema Changes? Regenerate.

Changed your schema? Hit generate again. New columns get new data. Far less fixture maintenance.

Major SQL Databases

PostgreSQL, MySQL, MariaDB, SQLite, SQL Server. Export as DDL, SQL, CSV, JSON or Parquet — and push to MongoDB, Redis or Elasticsearch.

Team Workflows

Share projects, push to shared staging DBs, set up cron schedules. Everyone gets fresh data.

Anonymize Production Data

Connect your production database, auto-detect PII, and get masked data that keeps formats and foreign keys intact — consistent, deterministic, with a privacy report per run. Or go fully synthetic: data with no copied production records behind it.

Pull a Consistent Subset

Carve a foreign-key-complete slice of your production data — a realistic 1% for local dev or CI, with every reference intact. No more 50 GB dumps.

Simulate Time, Not Snapshots

Growth curves, seasonality, cohorts and churn. Generate data that evolves like a living system — ideal for building analytics and dashboards.

Beyond SQL

Push the same consistent entities into MongoDB, Redis and Elasticsearch — or stream events to a webhook to simulate live traffic.

SDK, pytest & CI

A Python SDK and a pytest plugin pull deterministic, seeded data straight into your test suite. Populate a fresh database on every pull request.

For developers who live in the terminal.

Define your schema. Generate. Pull into your DB.

# Install $ pip install seedbase # Authenticate (opens browser) $ seedbase login ✓ Authenticated # Generate realistic, FK-safe data $ seedbase generate → ✓ users: 1,000 rows → ✓ posts: 5,000 rows → ✓ comments: 4,000 rows # Write schema + data into your DB $ seedbase pull all → myapp_dev ✓
// Install $ npm install @seedbase/client // Generate & download in your code import { SeedbaseClient } from "@seedbase/client"; const sb = new SeedbaseClient({ token: process.env.SEEDBASE_TOKEN }); const gen = await sb.generate(projectId, { wait: true }); const sql = await sb.download(gen.id, { format: "sql" }); // → 10,000 FK-safe rows, ready to load
# Install $ composer global require seedbase/seedbase # Authenticate (opens browser) $ seedbase login ✓ Authenticated # Generate & pull into your database $ seedbase generate myapp --wait $ seedbase pull myapp --to-file seed.sql → seed.sql ✓ # Or in Laravel $ php artisan db:seed --class="Seedbase\Laravel\SeedbaseSeeder"
# Cursor · VSCodium · Gitpod · Windsurf # → search "SeedBase" in the Extensions panel # …or from the command line: $ cursor --install-extension seedbase.seedbase ✓ Installed seedbase.seedbase # Browse projects, generate & pull SQL # straight into your editor, no terminal.

Define your schema. Generate. Pull into your DB.

Django · Laravel · Symfony · SQLAlchemy · Prisma · TypeORM · Rails · Sequelize

Your fixtures.sql is always outdated. seedbase pull never is.
Get the VS Code & Cursor extension on Open VSX → Also on the VS Code Marketplace →

Test data for Postgres, MySQL, Django and Prisma.

Seedbase isn’t just for Python. The CLI writes data straight into your database — from there on, your language doesn’t matter. Or call the REST API directly. PHP, Node, Java, Go: all the same to the rows in your tables.

pip CLI

pip install seedbase, then push schema and data into Postgres or MySQL. Your app reads from a real database — in any language.

REST API

No CLI? Hit the REST API with an API key. Trigger a generation, download SQL or JSON, wire it into any pipeline.

pytest plugin

For Python suites, a fixture pulls deterministic, seeded data straight into your tests. Fresh database on every run.

PHP, Node, Java, Go — once the data is in the database, the rest is up to you. See the docs.

A mock REST API whose data actually makes sense.

Flip one switch and your dataset becomes a live, read-only REST API. Foreign keys resolve to real linked rows, every endpoint paginates and filters, and the data is the same realistic, schema-aware data Seedbase generates. Build a frontend before the backend exists.

No backend required

Enable the mock API on any project and get a base URL with an unguessable token. Point your fetch calls at it. No server to write, no database to host.

Foreign keys that navigate

Follow relations like a real API: an order links to its customer and its line items, and those line items link back to real products. Not random IDs — consistent, connected data.

Query, page, filter, sort

Every collection supports pagination, field filters, sorting and search out of the box. CORS is open, so it works straight from the browser in local dev.

Enable it from the dashboard or right inside the VS Code Test data fixtures Django test data Symfony test data Laravel test data Prisma seed data and JetBrains plugins. Learn how the mock REST API works.

Synthetic test data for dev, CI, staging and demos.

New dev on the team? seedbase init && seedbase pull all — done. Schema and fresh test data in their DB in seconds. No more “ask Tim for his dump”.
Tests need data. Add seedbase pull to your pipeline. Every build gets fresh, consistent test data. No flaky tests from stale fixtures.
Staging should feel like production — without real customer data. Set up a schedule: fresh data every Monday at 6am. Automatic. Privacy-friendly.
Client project? Generate 10,000 realistic records for the demo. Looks more professional than 5 rows of “Test User 1”.
QA needs edge cases? Configure NULL probabilities, extreme values, Unicode strings. Reproducible, every single time.

For agencies and freelancers.

Every client project needs believable demo and test data — fast. Seedbase saves your team hours per project: spin up a credible dataset instead of hand-typing fixtures.

Templates & AI chat

Start from a ready-made schema template, or let Sprout, the built-in AI chat, build the schema from a plain description. A working dataset in minutes, not an afternoon.

Duplicate as a template

Built a setup that works? Duplicate the whole project for the next client and adjust the details. Your house style, reused on every engagement.

One team, many projects

Share projects across the team, push to shared staging databases, keep every client engagement in one place. New colleagues are productive on day one.

Demos that look like success.

A demo environment with three test records sells nothing. Seedbase generates data that looks like a product people already love — grown over time, not freshly inserted.

Realistic growth

Time simulation builds in cohorts, seasonality and plausible growth curves. Charts that trend up and to the right, because the underlying data actually evolved.

Built to convince

For sales demos, product walkthroughs and investor pitches: a populated, lived-in environment instead of “Test User 1”. Credible at first glance.

Reproducible

Seeded and deterministic — the same demo, every time. Reset and regenerate whenever you need a clean run.

A self-serve alternative to Tonic, Neosync and Gretel.

Tonic Neosync Gretel Seedbase
Generate from schema alone, no prod data⚠️ Needs a source DB✅❌ Needs training data✅
FK-correct relational data✅✅⚠️ Limited✅
Anonymize production data (GDPR)✅✅✅✅
Referential subsetting✅✅❌✅
Native CLI · SDK · pytest/CI⚠️ API only⚠️ CLI + SDK⚠️ ML SDK✅
AI assistant integration (Claude/MCP)❌❌❌✅
SQL + NoSQL targets (Mongo/Redis/ES)⚠️ Mostly SQL⚠️ SQL + Mongo❌ Files / tabular✅
Self-serve free tier❌ Enterprise sales✅ Open source⚠️ Usage credits✅

Export to SQL, CSV, JSON, and push to common databases.

Export as SQL, DDL, CSV, or JSON. Import from any SQL dialect.

Your data, your rules. No lock-in.

SeedBase generates synthetic data, so your production data never leaves your systems. And everything you create is yours to take, anytime.

Without touching production

Synthetic data from your schema. No production records copied, nothing sensitive leaves staging.

No lock-in

Export to SQL, CSV or JSON and push into your own database anytime. Config-as-code lives in your repo. Nothing is trapped here.

EU-hosted, privacy-first

Hosted in the EU, GDPR-native, and no third-party trackers anywhere in the product.

Here to stay

Bootstrapped, not chasing an exit. And because you can export everything, you are never tied to our future anyway.

The work that pays for itself.

Free fills a database in seconds. Pro removes the four things that make test data actually expensive.

Stop shipping 50 GB prod dumps to dev

Pull a foreign-key-complete 1% slice of production instead. Every reference intact, realistic for local dev and CI, no 50 GB downloads.

Kill flaky tests from stale fixtures

Seeded and deterministic: a fresh, foreign-key-consistent database on every pull request. Reproducible, no fixtures drifting from your schema.

Schema changed? One click, data fits again

Every migration used to break your hand-maintained fixtures. Re-sync from the schema instead and stop maintaining seed scripts by hand.

Masked data without the GDPR risk

Real emails and IBANs on dev machines are a breach waiting to happen. Connect production, auto-detect PII, get masked data that keeps formats and foreign keys, with a privacy report per run.

Start free. Scale when you need it.

Free
€0
For personal projects
  • 1 project
  • 10,000 rows per run
  • Web UI
  • SQL, CSV & JSON export
Get started
Pro
€19/mo
or €190/yr
For professional developers
  • Unlimited projects
  • 100,000 rows per run
  • CLI access
  • Parquet export
  • DB push
  • Cron schedules
Get Pro
Team
€79/mo
or €790/yr
For teams (5 seats included)
  • Everything in Pro
  • Shared projects
  • Team members
  • Push schedules
  • Priority support
Get Team

Start on Free, no card required.

Team includes 5 seats, add more anytime for €15/seat.

Test data generation, frequently asked questions

Stop writing INSERT statements. Start building.

Paste your schema. Get data. It's that simple.

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