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8 emulators 1,054 tests

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
    0.13.0 56 unsupported ; covers 94.7% of the suite

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

    Maintained by the board’s author

    Grade A
    0.9%Divergence
    94.7%Coverage
    diverged 0.9 percentage points more
    Tier breakdown
    Tier 1 · Core 2.0% diverges
    100.0% covered
    Tier 2 · Complete 0.0% diverges
    82.2% covered 40 unsupported
    Tier 3 · Strict 0.0% diverges
    95.3% covered 16 unsupported
    Also built for WebAssembly / OPFS
    • WebAssembly / OPFS
      Grade B

      low divergence (0.9%) · covers 83.4% · coverage lowers this row to B

  3. ExtendDB
    v0.1.3 129 unsupported ; covers 87.8% of the suite

    Runs via: source

    Grade B
    2.0%Divergence
    87.8%Coverage

    coverage lowers this row to B

    diverged 0.1 percentage points more, grade A to B
    Tier breakdown
    Tier 1 · Core 0.8% diverges
    100.0% covered
    Tier 2 · Complete 2.7% diverges
    51.6% covered 109 unsupported
    Tier 3 · Strict 3.2% diverges
    94.1% covered 20 unsupported
  4. Ministack
    63621de32116 42 unsupported ; covers 96.0% of the suite

    Runs via: pip, Docker, source

    Grade B
    11.9%Divergence
    96.0%Coverage
    diverged 0.6 percentage points more
    Tier breakdown
    Tier 1 · Core 5.7% diverges
    100.0% covered
    Tier 2 · Complete 15.1% diverges
    88.4% covered 26 unsupported
    Tier 3 · Strict 18.5% diverges
    95.3% covered 16 unsupported
  5. Dynalite
    4.0.0 242 unsupported ; covers 77.0% of the suite

    Runs via: npm, npx, embedded

    Grade C
    13.0%Divergence
    77.0%Coverage

    coverage lowers this row to C

    diverged 0.7 percentage points more
    Tier breakdown
    Tier 1 · Core 10.8% diverges
    100.0% covered
    Tier 2 · Complete 12.4% diverges
    17.8% covered 185 unsupported
    Tier 3 · Strict 16.5% diverges
    83.2% covered 57 unsupported
  6. LocalStack
    2026.7.3 50 unsupported ; covers 95.3% of the suite

    Runs via: Docker, pip, Homebrew, binary

    Grade C
    14.9%Divergence
    95.3%Coverage

    coverage lowers this row to C

    diverged 0.7 percentage points less
    Tier breakdown
    Tier 1 · Core 6.3% diverges
    100.0% covered
    Tier 2 · Complete 16.0% diverges
    84.9% covered 34 unsupported
    Tier 3 · Strict 26.5% diverges
    95.3% covered 16 unsupported
  7. DynamoDB Local
    ff89bd48ff32 63 unsupported ; covers 94.0% of the suite

    Runs via: Docker, JAR, Maven

    Grade C
    15.2%Divergence
    94.0%Coverage
    diverged 0.8 percentage points less
    Tier breakdown
    Tier 1 · Core 7.6% diverges
    100.0% covered
    Tier 2 · Complete 14.2% diverges
    79.1% covered 47 unsupported
    Tier 3 · Strict 26.8% diverges
    95.3% covered 16 unsupported
  8. Floci
    eab36252ea43 51 unsupported ; covers 95.2% of the suite

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

    Grade C
    21.0%Divergence
    95.2%Coverage
    unchanged
    Tier breakdown
    Tier 1 · Core 10.8% diverges
    100.0% covered
    Tier 2 · Complete 32.4% diverges
    84.4% covered 35 unsupported
    Tier 3 · Strict 27.9% diverges
    95.3% covered 16 unsupported