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DBLift vs Umwelt

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

DBLift compared with Umwelt
DetailDBLift logo DBLiftUmwelt logo Umwelt
What it doesPython database migration tool with SQL preview, validation and undo An epistemic state engine that tracks what each character knows, and how they learned it
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Open source
PricingOpen-source core free under Apache 2.0. Pro and Enterprise tiers available at https://dblift.com/pricing/ AGPL-3.0-only open source license. Commercial license available for closed-source products, services and hosted APIs. Free Play Exception covers free games, mods, interactive fiction and tabletop tools (excluding games with price, in-game purchases, ads, paid content or early access).
Key features
  • Preview SQL with dry-run before execution
  • Migration validation and consistency checking
  • Schema comparison and diff
  • SQL review without execution
  • Undo and rollback capabilities
  • Python API and pytest plugin
  • Audited data corrections
  • GitHub Action and MCP server for AI agents
  • Migration history tracking in schema history table
  • Tracks what each character knows and how they learned it
  • Prevents AI models from leaking story information or twists
  • Records confirmed history that is never deleted
  • Single portable .umw file for entire world state
  • Works across TypeScript, .NET, CLI and any language via JSON protocol
  • Query from any character's point of view at any moment in time
  • Performance of 55-65 microseconds per query with half a million holdings
  • Free Play Exception for non-commercial games and tabletop tools
What makes it different
  • Installed with pip, no JVM required unlike Flyway
  • Native Python integration with MigrationContext for data changes
  • Open-source core under Apache 2.0 with no vendor lock-in
  • Supports Flyway history import and baseline
  • Separates world state from character knowledge to prevent narrative leakage
  • Guarantees written down with conformance testing across all clients
  • Idempotent writes ensure consistency across retries
  • Works without AI or can control what AI models are allowed to know
  • Open source with commercial licensing option for closed-source products
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)6 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)94
Citation Flow (Majestic)1812
Referring domains (Majestic)331

5 details filled in for both companies.

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