Sequelize
A database abstraction layer for Node.js and TypeScript that maps application objects to relational database tables
- Also known as
- sequelize
Available worldwide
What is Sequelize?
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.
Sequelize pricing
We don't have Sequelize's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Sequelize does
The capabilities that matter for orm & database tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Type-safe queries
- ✓
- Schema migrations
- ✓
- Relations / joins API
- ✓
- Languages
- JavaScript, TypeScript
- Schema-first modelling
- ✓
- Raw SQL escape hatch
- -
- Multiple database backends
- ✓
- Connection pooling
- -
- Data browser / studio
- -
Platform & deployment
Independently observed- CLI
- Self-hosted
Security & compliance
Known vulnerabilities: 19 (2 in the last 12 months), max severity CRITICAL sourcea count reflects scale & disclosure, not quality
Sequelize FAQ
Common questions about Sequelize, answered from independent, dated evidence.
What is Sequelize?
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. It is indexed under ORM & Database Tools.
Source: https://sequelize.org
Is Sequelize free to use?
Sequelize is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.
Source: https://sequelize.org
What platforms does Sequelize support?
Sequelize supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://sequelize.org
Can Sequelize be self-hosted?
Yes. Sequelize can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://sequelize.org
Is Sequelize open source?
Yes. Sequelize is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Sequelize alternatives
Other orm & database tools we track, ranked by the same independent score.
- PrismaA unified backend platform providing type-safe database access, managed Postgres, and application hosting for TypeScript developmenthigh · 75%
- SQLAlchemyPython library for database interaction through object-oriented and SQL-based approacheshigh · 79%
- KyselyA library for writing TypeScript-based SQL queries with compile-time type checkinghigh · 79%
- Drizzle ORMA TypeScript database library with type-safe queries and schema managementmedium · 70%
- MikroORMTypeScript database abstraction library for Node.js applicationshigh · 78%
- Knex.jsA database query builder for Node.js applications supporting multiple SQL databasesmedium · 72%
Compare Sequelize
Side by side against other orm & database tools, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Sequelize, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Package downloads | 82 | 0.17 | 14.2 | ✓ |
| Dependent projects | 88 | 0.08 | 7.0 | ✓ |
| Capabilities | 75 | 0.08 | 6.2 | ✓ |
| Release cadence | 89 | 0.07 | 6.0 | ✓ |
| Development activity | 46 | 0.12 | 5.5 | ✓ |
| Security score | 67 | 0.05 | 3.6 | ✓ |
| Stars | 85 | 0.03 | 2.8 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Security posture | 5 | 0.09 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 28 | mediumsource · 2026-09-11 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 68% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Multi db: Yes · Languages: JavaScript, TypeScript · Relations: Yes · Migrations: Yes · Schema first: Yes · Type safe queries: Yes | mediumsource · 2026-09-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | TypeScript | highsource · 2026-09-11 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-09-11 · 99% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-14 · 75% |
Pricing
Release
Security
| Attribute | Value | Evidence |
|---|---|---|
| Disclosure policy | Yes | mediumsource · 2026-08-14 · 60% |
| Scorecard | 6.7 | highsource · 2026-09-11 · 90% |
| Vulnerabilities | Count: 19 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=sequelize&per_page=100 · Last 12m: 2 · Max severity: CRITICAL | highsource · 2026-08-26 · 90% |
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