Run 13 Sep 2026

Results as of this run. The arrow shows each target's movement since the previous run it was tested in.

1. DynamoDB

   live (AWS)

   Runs via: AWS service

   – Grade baseline

   0.0%Divergence

   100.0%Coverage

   no divergence in all 33 regions

   ground truth
   Tier breakdown

   Tier 1 · Core 0.0% diverges

   100.0% covered

   Tier 2 · Complete 0.0% diverges

   100.0% covered

   Tier 3 · Strict 0.0% diverges

   100.0% covered
2. Dynoxide

   1.1.0 14 unsupported ; covers 98.9% of the suite

   Runs via: npx, Docker, Homebrew, binary, npm, cargo, embedded, GitHub Action, source

   Maintained by the board’s author

   A Grade A

   0.2%Divergence

   98.9%Coverage

   low divergence (0.2%) in 22 regions · up to 0.5% in the other 11

   – 0.0pp unchanged
   Tier breakdown

   Tier 1 · Core 0.0% diverges

   100.0% covered

   Tier 2 · Complete 0.0% diverges

   95.9% covered 14 unsupported

   Tier 3 · Strict 0.5% diverges

   100.0% covered
   Also built for WebAssembly / OPFS

   • ↳ WebAssembly / OPFS
     A Grade A

     low divergence (0.2%) in 16 regions · up to 0.5% in the other 17 · covers 88.8%
3. Ministack

   cd4ac9bc91f7 52 unsupported ; covers 95.8% of the suite

   Runs via: pip, Docker, source

   B Grade B

   7.1%Divergence

   95.8%Coverage

   moderate divergence (7.1%) in 6 regions · up to 7.3% in the other 27

   ▼ 10.5pp less C → B diverged 10.5 percentage points less, grade C to B
   Tier breakdown

   Tier 1 · Core 0.0% diverges

   100.0% covered

   Tier 2 · Complete 0.3% diverges

   89.6% covered 36 unsupported

   Tier 3 · Strict 21.5% diverges

   96.1% covered 16 unsupported
4. ExtendDB

   v0.1.11 267 unsupported ; covers 78.7% of the suite

   Runs via: source

   B Grade B

   1.8%Divergence

   78.7%Coverage

   low divergence (1.8%) in 16 regions · up to 2.2% in the other 17

   coverage lowers this row to B

   – 0.0pp unchanged
   Tier breakdown

   Tier 1 · Core 0.0% diverges

   100.0% covered

   Tier 2 · Complete 0.0% diverges

   33.6% covered 229 unsupported

   Tier 3 · Strict 5.6% diverges

   90.7% covered 38 unsupported
   Also built for SQLite

   • ↳ SQLite
     B Grade B

     low divergence (2.1%) in 16 regions · up to 2.4% in the other 17 · covers 82.8% · coverage lowers this row to B
5. LocalStack

   2026.8.2 59 unsupported ; covers 95.3% of the suite

   Runs via: Docker, pip, Homebrew, binary

   B Grade B

   8.1%Divergence

   95.3%Coverage

   moderate divergence (8.1%) in 1 region · up to 8.3% in the other 32

   – 0.0pp unchanged
   Tier breakdown

   Tier 1 · Core 2.8% diverges

   100.0% covered

   Tier 2 · Complete 12.5% diverges

   87.5% covered 43 unsupported

   Tier 3 · Strict 10.7% diverges

   96.1% covered 16 unsupported
6. DynamoDB Local

   ff89bd48ff32 73 unsupported ; covers 94.2% of the suite

   Runs via: Docker, JAR, Maven

   C Grade C

   15.7%Divergence

   94.2%Coverage

   high divergence (15.7%) in 16 regions · up to 15.7% in the other 17

   – 0.0pp unchanged
   Tier breakdown

   Tier 1 · Core 7.5% diverges

   100.0% covered

   Tier 2 · Complete 15.4% diverges

   83.5% covered 57 unsupported

   Tier 3 · Strict 25.9% diverges

   96.1% covered 16 unsupported
7. Dynalite

   4.0.0 386 unsupported ; covers 69.1% of the suite

   Runs via: npm, npx, embedded

   C Grade C

   11.5%Divergence

   69.1%Coverage

   moderate divergence (11.5%) in 11 regions · up to 11.7% in the other 22

   coverage lowers this row to C

   – 0.0pp unchanged
   Tier breakdown

   Tier 1 · Core 10.7% diverges

   100.0% covered

   Tier 2 · Complete 8.1% diverges

   11.6% covered 305 unsupported

   Tier 3 · Strict 15.4% diverges

   80.2% covered 81 unsupported
8. Floci

   4e451c39c7bb 61 unsupported ; covers 95.1% of the suite

   Runs via: Docker, Homebrew, install script, Scoop, binary, JAR

   D Grade D

   26.9%Divergence

   95.1%Coverage

   very high divergence (26.9%) in 6 regions · up to 27.0% in the other 27

   ▼ 0.1pp less diverged 0.1 percentage points less
   Tier breakdown

   Tier 1 · Core 10.1% diverges

   100.0% covered

   Tier 2 · Complete 44.3% diverges

   87.0% covered 45 unsupported

   Tier 3 · Strict 32.4% diverges

   96.1% covered 16 unsupported