Drift Scanner vs Flyway Drift detection vs migration management
Flyway applies the migrations you write. Drift Scanner catches the changes that bypass them. Different jobs, often used together — here's how they compare.
The short version
Read-only Postgres watcher. Snapshots the schema, alerts on drift outside the migration pipeline. Setup in under five minutes.
Versioned SQL migrations applied in sequence. The default for JVM teams. Free Community edition; Teams adds undo, dry-runs, and central management.
Feature comparison
| Feature | Drift Scanner | Flyway |
|---|---|---|
| Primary purpose | Detect unauthorized schema changes | Apply versioned migrations |
| Detects unauthorized changes | Yes | No |
| Manages migrations | No | Yes |
| Read-only connection | Yes | No (needs write access) |
| GitHub Action | Yes | Yes |
| Alert on drift | Slack, email, webhook | No |
| Migration lock prediction | Yes | No |
| Rollback support | N/A (read-only) | Yes (Teams edition) |
| CI/CD integration | Yes | Yes |
| Database support | PostgreSQL | PostgreSQL, MySQL, Oracle, SQL Server, 20+ |
| Pricing | From $49/mo | Free (Community) / ~$500+/mo (Teams) |
| Setup time | < 5 minutes | 15–60 minutes |
What Drift Scanner does
Drift Scanner connects with read-only credentials, snapshots your PostgreSQL schema, and watches for changes against that baseline — new columns, dropped indexes, modified constraints, altered permissions.
When it spots drift, your team gets a Slack ping, email, or webhook with the exact change, when it landed, and which objects moved. That closes the gap between what your migration tool tracks and what's actually live.
Why teams add Drift Scanner alongside Flyway
- A developer runs an ad-hoc ALTER TABLE in production to unblock a deploy. Flyway has no record. Drift Scanner catches it within minutes.
- A managed Postgres provider applies a maintenance change that swaps an index. Drift Scanner surfaces it before query latency moves.
- An ORM in staging auto-generates a column that was never in a migration. Drift Scanner flags it.
- Compliance asks for proof your live schema matches the migration history. Drift Scanner gives you continuous evidence.
What Flyway does
Flyway applies versioned SQL scripts to your database in a controlled sequence. You write migration files (V1__create_users.sql, V2__add_email_index.sql) and Flyway tracks which have run via its history table.
It supports 20+ databases, plugs into most CI/CD systems, and has been the migration default in Java-shaped teams for over a decade. Community is free. Teams and Enterprise add undo, dry runs, and centralized management.
Where Flyway shines
- Repeatable, version-controlled migrations across dev, staging, and production.
- Broad database support and a mature plugin ecosystem.
- Tight integration with Spring Boot, Quarkus, Micronaut.
- Baseline support for adopting migrations on existing databases.
Which should you choose?
Choose Drift Scanner if…
- You need to catch schema changes that bypass your migration pipeline
- You want production schema monitoring with no write access
- Compliance requires continuous evidence the schema matches expectations
- You want instant alerts on ad-hoc DDL in production
- You need migration lock prediction before you deploy
Choose Flyway if…
- You need a tool to apply and track versioned SQL migrations
- You work across multiple database engines beyond Postgres
- You want a mature, widely-adopted migration framework
- Your team uses Java or JVM frameworks with built-in Flyway support
- You need undo or rollback for migration scripts
Most teams use both. Flyway applies the changes you plan. Drift Scanner catches everything else. Complementary, not competing.
Questions
Can I use Drift Scanner and Flyway together?
Yes. Flyway applies your planned migrations; Drift Scanner watches for changes outside that pipeline. Different problems, complementary tools.
Does Drift Scanner replace my migration tool?
No. Drift Scanner doesn't apply changes — it only reads. You still need Flyway, Liquibase, or another tool for migrations.
How does Drift Scanner detect unauthorized changes?
It snapshots your Postgres schema, compares each scan against the baseline, and alerts when columns, indexes, or constraints change outside the migration pipeline.
Does Flyway detect direct database changes?
No. Flyway only knows about migrations it ran. Direct psql or GUI changes are invisible to it. That's the gap Drift Scanner fills.
Is Drift Scanner read-only?
Yes. It connects with read-only credentials. It cannot modify your schema or data — safe to point at production.
What does Drift Scanner cost vs Flyway?
Drift Scanner Pro is $49/mo. Flyway Community is free; Flyway Teams starts around $500/mo per deployment target. They solve different problems, so most teams budget for both.
Add drift detection to your Flyway workflow
Setup in under five minutes. Read-only connection. No changes to your migration pipeline.
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