# Dapper vs Kysely

**Leader by Vioscale score:** Kysely

| Attribute | Dapper | Kysely |
|---|---|---|
| **Vioscale score** | 52.1 (38% (low)) | 70.3 (79% (high)) |
| activity.commits_last_30d | 6 | 25 |
| adoption.dependent_repos | 477 | 1,155 |
| adoption.github_stars | 18,373 | 14,168 |
| adoption.package_downloads_weekly | - | 14,615,271 |
| deployment.options | - | `{"cloud":true,"self_hosted":true}` |
| description.long | A micro-ORM for .NET that extends ADO.NET connections to execute SQL queries and stored procedures, supporting both synchronous and asynchronous operations with features for object mapping, dynamic SQL building, and multi-result set processing. | A JavaScript and TypeScript SQL query builder that provides compile-time type safety and database schema validation. It works across multiple runtimes (Node, Deno, Bun, Cloudflare Workers, browsers) with zero runtime dependencies and emphasizes composable, type-safe queries over higher-level abstractions. |
| features.capabilities | `{"raw_sql":true,"multi_db":true,"languages":"C# / .NET (all TFMs)","relations":true}` | `{"raw_sql":true,"multi_db":true,"languages":"TypeScript, JavaScript (Node, Deno, Bun, Cloudflare Workers, browsers)","relations":true,"migrations":false,"studio_gui":false,"schema_first":true,"type_safe_queries":true,"connection_pooling":false}` |
| integrations.count | - | 21 |
| integrations.list | - | `[{"name":"Supabase"},{"name":"Cursor"},{"name":"Windsurf"},{"name":"GitHub Copilot"},{"name":"ChatGPT"},{"name":"Claude"},{"name":"Claude Code"},{"name":"AirTrail"},{"name":"AWS Blocks"},{"name":"Conar"},{"name":"EmbedPDF"},{"name":"Hot Updater"},{"name":"inlang"},{"name":"Notesnook"},{"name":"OpenClaw"},{"name":"Reflect"},{"name":"Sink"},{"name":"Stacks"},{"name":"StudioCMS"},{"name":"Tunarr"},{"name":"ZenStack"}]` |
| language.primary | C# | TypeScript |
| license.spdx | - | MIT |
| platform.support | - | `{"cli":true,"web":true}` |
| pricing | - | `{"type":"open_source","summary":"Completely free and open source (MIT license)","freeTier":true,"sourceUrl":"https://kysely.dev","retrievedAt":"2026-08-14T08:37:15.404Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | - | open_source |
| pricing.price_level | - | free |
| pricing.transparent | - | yes |
| release.cadence_days | 26 | 10 |
| release.history | `[{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.79","date":"2026-05-16T20:40:41Z","type":"stable","version":"2.1.79"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.72","date":"2026-03-06T07:16:11Z","type":"stable","version":"2.1.72"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.66","date":"2025-02-06T12:26:12Z","type":"stable","version":"2.1.66"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.44","date":"2024-04-12T12:42:44Z","type":"stable","version":"2.1.44"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.42","date":"2024-04-12T10:23:44Z","type":"stable","version":"2.1.42"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.37","date":"2024-03-14T15:17:02Z","type":"stable","version":"2.1.37"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.35","date":"2024-03-06T15:08:18Z","type":"stable","version":"2.1.35"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.28","date":"2024-01-02T16:13:39Z","type":"stable","version":"2.1.28"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.24","date":"2023-11-23T09:30:26Z","type":"stable","version":"2.1.24"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.21","date":"2023-11-11T09:07:29Z","type":"stable","version":"2.1.21"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.15","date":"2023-10-19T12:52:19Z","type":"stable","version":"2.1.15"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.11","date":"2023-10-13T06:26:06Z","type":"stable","version":"2.1.11"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.4","date":"2023-09-13T20:52:44Z","type":"stable","version":"2.1.4"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.1.1","date":"2023-09-12T15:17:35Z","type":"stable","version":"2.1.1"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.0.151","date":"2023-08-18T09:51:46Z","type":"stable","version":"2.0.151"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.0.143","date":"2023-06-20T12:43:19Z","type":"stable","version":"2.0.143"},{"url":"https://github.com/DapperLib/Dapper/releases/tag/2.0.138","date":"2023-06-09T15:32:01Z","type":"stable","version":"2.0.138"}]` | `[{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.29.5","date":"2026-08-10T01:06:13Z","type":"stable","version":"v0.29.5"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.30.0-beta.1","date":"2026-07-26T17:34:07Z","type":"prerelease","version":"v0.30.0-beta.1"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.30.0-beta.0","date":"2026-07-25T12:45:33Z","type":"prerelease","version":"v0.30.0-beta.0"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.29.4","date":"2026-07-17T17:42:04Z","type":"stable","version":"v0.29.4"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.29.3","date":"2026-07-05T23:18:21Z","type":"stable","version":"v0.29.3"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.29.2","date":"2026-05-16T15:52:03Z","type":"stable","version":"v0.29.2"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.29.1","date":"2026-05-16T00:01:27Z","type":"stable","version":"v0.29.1"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.29.0","date":"2026-05-08T23:54:19Z","type":"stable","version":"v0.29.0"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.17","date":"2026-05-03T01:10:50Z","type":"stable","version":"v0.28.17"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.29.0-rc.0","date":"2026-04-24T20:13:08Z","type":"prerelease","version":"v0.29.0-rc.0"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.16","date":"2026-04-10T18:07:40Z","type":"stable","version":"v0.28.16"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.15","date":"2026-03-31T01:49:35Z","type":"stable","version":"v0.28.15"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.14","date":"2026-03-20T11:28:01Z","type":"stable","version":"v0.28.14"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.13","date":"2026-03-18T22:12:57Z","type":"stable","version":"v0.28.13"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.12","date":"2026-03-14T09:13:30Z","type":"stable","version":"v0.28.12"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.11","date":"2026-01-31T18:58:27Z","type":"stable","version":"v0.28.11"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.10","date":"2026-01-18T07:13:52Z","type":"stable","version":"v0.28.10"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.9","date":"2025-12-13T17:48:32Z","type":"stable","version":"v0.28.9"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.8","date":"2025-10-09T21:47:50Z","type":"stable","version":"v0.28.8"},{"url":"https://github.com/kysely-org/kysely/releases/tag/v0.28.7","date":"2025-09-14T15:37:33Z","type":"stable","version":"v0.28.7"}]` |
| reliability.status_page | yes | - |
| security.scorecard | - | 7.3 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=nuget&package_name=dapper&per_page=100","last_12m":0,"max_severity":null}` | `{"count":4,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=kysely&per_page=100","last_12m":4,"max_severity":"HIGH"}` |

## Capabilities (ORM & Database Tools)

| Capability | Dapper | Kysely |
|---|:--:|:--:|
| **Core** |  |  |
| Type-safe queries | - | ✓ |
| Schema migrations | - | ✗ |
| Relations / joins API | ✓ | ✓ |
| Languages | C# / .NET (all TFMs) | TypeScript, JavaScript (Node, Deno, Bun, Cloudflare Workers, browsers) |
| **Modelling** |  |  |
| Schema-first modelling | - | ✓ |
| **Flexibility** |  |  |
| Raw SQL escape hatch | ✓ | ✓ |
| **Portability** |  |  |
| Multiple database backends | ✓ | ✓ |
| **Ops** |  |  |
| Connection pooling | - | ✗ |
| **DX** |  |  |
| Data browser / studio | - | ✗ |

*Source: Vioscale. Generated 2026-09-01T17:02:40.285Z. "-" = undocumented, not absent.*