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.
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. Millions of realistic, FK-safe rows in seconds.
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
Foreign keys are resolved automatically. Every reference points to a real row. No broken constraints.
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. No broken fixtures.
Every Database
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 provably no real customers 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. Spin up 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.
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.
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. GDPR-compliant.
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 any database.
PostgreSQL MySQL MariaDB SQLite SQL Server MongoDB Redis Elasticsearch
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.
Start free. Scale when you need it.
Pro
€19/mo
or €190/yr
For professional developers
- Unlimited projects
- 100,000 rows per run
- CLI access
- All export formats
- DB push
- Cron schedules
Team
€79/mo
or €790/yr
For teams (5 seats included)
- Everything in Pro
- Shared projects
- Team members
- Push schedules
- Priority support
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.
Sign UpStart free, no credit card required.