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9 emulators 1,056 tests

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

Scored against 33 real regions. 1 dropped, out of scoring until it returns: me-south-1
  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
    1.0.0 14 unsupported ; covers 98.7% of the suite

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

    Maintained by the board’s author

    Grade A
    0.0%Divergence
    98.7%Coverage

    no divergence in 2 regions · up to 0.4% in the other 31

    coverage lowers this row to A

    unchanged
    Tier breakdown
    Tier 1 · Core 0.0% diverges
    100.0% covered
    Tier 2 · Complete 0.0% diverges
    93.8% covered 14 unsupported
    Tier 3 · Strict 0.0% diverges
    100.0% covered
    Also built for WebAssembly / OPFS
    • WebAssembly / OPFS
      Grade A

      no divergence in 2 regions · up to 0.4% in the other 31 · covers 87.4% · coverage lowers this row to A

  3. ExtendDB
    v0.1.10 131 unsupported ; covers 87.6% of the suite

    Runs via: source

    Grade A
    0.1%Divergence
    87.6%Coverage

    low divergence (0.1%) in 5 regions · up to 0.5% in the other 28

    diverged 1.6 percentage points less, grade B to A
    Tier breakdown
    Tier 1 · Core 0.0% diverges
    100.0% covered
    Tier 2 · Complete 0.0% diverges
    51.1% covered 111 unsupported
    Tier 3 · Strict 0.3% diverges
    94.1% covered 20 unsupported
    Also built for SQLite
    • SQLite
      Grade A

      low divergence (0.2%) in 5 regions · up to 0.6% in the other 28 · covers 91.8%

  4. LocalStack
    2026.8.0 51 unsupported ; covers 95.2% of the suite

    Runs via: Docker, pip, Homebrew, binary

    Grade B
    3.5%Divergence
    95.2%Coverage

    low divergence (3.5%) in 1 region · up to 3.8% in the other 32

    coverage lowers this row to B

    diverged 11.3 percentage points less, grade C to B
    Tier breakdown
    Tier 1 · Core 2.9% diverges
    100.0% covered
    Tier 2 · Complete 7.9% diverges
    84.6% covered 35 unsupported
    Tier 3 · Strict 1.5% diverges
    95.3% covered 16 unsupported
  5. Ministack
    8d26ee74aa0c 44 unsupported ; covers 95.8% of the suite

    Runs via: pip, Docker, source

    Grade B
    11.8%Divergence
    95.8%Coverage

    moderate divergence (11.8%) in 21 regions · up to 11.9% in the other 12

    unchanged
    Tier breakdown
    Tier 1 · Core 5.7% diverges
    100.0% covered
    Tier 2 · Complete 15.0% diverges
    87.7% covered 28 unsupported
    Tier 3 · Strict 18.5% diverges
    95.3% covered 16 unsupported
  6. DynamoDB Local
    ff89bd48ff32 65 unsupported ; covers 93.8% of the suite

    Runs via: Docker, JAR, Maven

    Grade C
    15.1%Divergence
    93.8%Coverage

    high divergence (15.1%) in 25 regions · up to 15.2% in the other 8

    unchanged
    Tier breakdown
    Tier 1 · Core 7.6% diverges
    100.0% covered
    Tier 2 · Complete 14.1% diverges
    78.4% covered 49 unsupported
    Tier 3 · Strict 26.5% diverges
    95.3% covered 16 unsupported
  7. Dynalite
    4.0.0 244 unsupported ; covers 76.9% of the suite

    Runs via: npm, npx, embedded

    Grade C
    12.8%Divergence
    76.9%Coverage

    moderate divergence (12.8%) in 25 regions · up to 13.0% in the other 8

    coverage lowers this row to C

    unchanged
    Tier breakdown
    Tier 1 · Core 10.8% diverges
    100.0% covered
    Tier 2 · Complete 12.3% diverges
    17.6% covered 187 unsupported
    Tier 3 · Strict 15.9% diverges
    83.2% covered 57 unsupported
  8. Floci
    bec9b9f74932 53 unsupported ; covers 95.0% of the suite

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

    Grade C
    20.9%Divergence
    95.0%Coverage

    high divergence (20.9%) in 21 regions · up to 21.0% in the other 12

    diverged 0.1 percentage points more
    Tier breakdown
    Tier 1 · Core 10.8% diverges
    100.0% covered
    Tier 2 · Complete 32.2% diverges
    83.7% covered 37 unsupported
    Tier 3 · Strict 27.9% diverges
    95.3% covered 16 unsupported