Comparison

Dapper vs Sequelize

On the evidence we track, Sequelize leads this comparison with a composite score of 74/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Dapper full profile →Sequelize full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Dapper52

★Sequelize74

Attribute comparison across 2 tools
Attribute	Dapper	SequelizeLeader
Vioscale score	52 / 100low · 38%updating	74 / 100medium · 72%updating
Pricing
Free tierpricing.free_tier	-	✓
Modelpricing.model	-	commercial
Price levelpricing.price_level	-	free
Transparentpricing.transparent	-	✓
Security
Disclosure policysecurity.disclosure_policy	-	✓
Scorecardsecurity.scorecard	-	6.7
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=nuget&package_name=dapper&per_page=100 · Last 12m: 0	Count: 19 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=sequelize&per_page=100 · Last 12m: 2 · Max severity: CRITICAL
Reliability
Status pagereliability.status_page	✓	-
Adoption
Dependent reposadoption.dependent_repos	477	193,226
Github starsadoption.github_stars	18,373	30,377
Package downloads weeklyadoption.package_downloads_weekly	-	2,842,247
Activity
Commits last 30dactivity.commits_last_30d	6	7
Release
Cadence daysrelease.cadence_days	26	20
Historyrelease.history	17 items	20 items
License
Spdxlicense.spdx	-	MIT
Language
Primarylanguage.primary	C#	TypeScript
Market
Availabilitymarket.availability	-	Available worldwide

Score

Vioscale score

Dapper52 / 100low · 38%updating

Sequelize74 / 100medium · 72%updating

Pricing

Free tier

Dapper–

Sequelize✓

Model

Dapper–

Sequelizecommercial

Price level

Dapper–

Sequelizefree

Transparent

Dapper–

Sequelize✓

Security

Disclosure policy

Dapper–

Sequelize✓

Scorecard

Dapper–

Sequelize6.7

Vulnerabilities

DapperCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=nuget&package_name=dapper&per_page=100 · Last 12m: 0

SequelizeCount: 19 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=sequelize&per_page=100 · Last 12m: 2 · Max severity: CRITICAL

Reliability

Status page

Dapper✓

Sequelize–

Adoption

Dependent repos

Dapper477

Sequelize193,226

Github stars

Dapper18,373

Sequelize30,377

Package downloads weekly

Dapper–

Sequelize2,842,247

Activity

Commits last 30d

Dapper6

Sequelize7

Release

Cadence days

Dapper26

Sequelize20

History

Dapper17 items

Sequelize20 items

License

Spdx

Dapper–

SequelizeMIT

Language

Primary

DapperC#

SequelizeTypeScript

Market

Availability

Dapper–

SequelizeAvailable worldwide

Capabilities

Feature-by-feature on the axes that matter for orm & database tools. “-” means undocumented, not absent.

Capability comparison for ORM & Database Tools
Capability	Dapper	Sequelize
Core
Type-safe queries	-	✓
Schema migrations	-	✓
Relations / joins API	✓	✓
Languages	C# / .NET (all TFMs)	JavaScript, TypeScript
Modelling
Schema-first modelling	-	✓
Flexibility
Raw SQL escape hatch	✓	-
Portability
Multiple database backends	✓	✓
Ops
Connection pooling	-	-
DX
Data browser / studio	-	-

Core

Type-safe queries

Dapper-

Sequelize✓

Schema migrations

Dapper-

Sequelize✓

Relations / joins API

Dapper✓

Sequelize✓

Languages

DapperC# / .NET (all TFMs)

SequelizeJavaScript, TypeScript

Modelling

Schema-first modelling

Dapper-

Sequelize✓

Flexibility

Raw SQL escape hatch

Dapper✓

Sequelize-

Portability

Multiple database backends

Dapper✓

Sequelize✓

Ops

Connection pooling

Dapper-

Sequelize-

Data browser / studio

Dapper-

Sequelize-

What each one is

The product in its own terms, so the numbers below have context.

Dapper

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.

Independently observed

Sequelize

Leader

Sequelize is an ORM that bridges JavaScript and TypeScript applications with multiple relational databases including PostgreSQL, MySQL, MariaDB, SQLite, Oracle, SQL Server, Snowflake, and DB2. It provides declarative schema modeling, relationship definitions, transaction support, and flexible data loading strategies.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Dapper

Pricing not documented yet.

Sequelize

Leader

Open sourceFree tier

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Dapper	Sequelize
CLIPlatforms	-	✓
Self-hostedDeployment	-	✓

Platforms

CLI

Dapper–

Sequelize✓

Deployment

Self-hosted

Dapper–

Sequelize✓

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.