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It's a split decision.
PostgreSQL is an open-source object-relational database system for teams that want to run and operate a database server. SQLite is a public-domain C library that embeds a SQL engine in an application. Both are free to use and self-hostable, but they fit different architectures: PostgreSQL is a separate server, while SQLite is built into mobile phones, most computers and many applications. Choose based on whether your code needs a database server or embedded storage.
01Side by side
| PostgreSQL | SQLite | |
|---|---|---|
| Pricing model | Free open-source software; no paid plans | Free core; optional paid support and extensions |
| Free tier | Free of charge; no published usage limits | Public-domain source, free for any purpose |
| Open-source licence | OSI-approved PostgreSQL License | Public-domain source code |
| Self-hosting | Self-hostable database system | Self-hostable C library |
| API and SDKs | Database system; SDKs not named | C library with C/C++ APIs and TCL interface |
| CLI and docs | Official documentation and community resources | Documentation, CLI, C/C++ API specs and TCL interface |
| Integrations | Homepage lists no specific integrations | Built into phones, computers and many applications |
| Deployment model | Database server; teams provide hosting and operations | Embedded library; SQL engine within an application |
PostgreSQL Choose PostgreSQL if
- Choose PostgreSQL if you need an open-source database server.
- Choose PostgreSQL if your team will handle hosting and operations.
- Choose PostgreSQL if you want its official documentation and community resources.
SQLite Choose SQLite if
- Choose SQLite if you want SQL storage embedded in an application.
- Choose SQLite if a C-language library fits your integration.
- Choose SQLite if public-domain source code suits your licensing needs.
02Pricing at real usage
Both engines are free to use; neither charges per query, seat or database in the pricing facts. PostgreSQL has no paid plans, and the project is open source under the OSI-approved PostgreSQL License. Monthly and annual billing do not apply.
SQLite’s core source is public domain and free for any purpose. Optional services and products change its cost: the Annual Maintenance Subscription is $1,500 per year for one development team, one contact and up to 20 contact hours. Standard technical support is $8,000 for one year; custom packages are generally $8,000–$35,000 annually. The SQLite License is a separate $6,000 one-time fee for a perpetual right to use core code; it is not a runtime fee. Paid encryption and compression extensions are listed at $2,000–$4,000 one time. Budget separately for hosting and operations.
03API, SDKs and integration
PostgreSQL is an object-relational database system. Its homepage points developers to official documentation for installing and using it, plus community resources for learning and support. The homepage does not name SDKs or specific integrations, so check the official documentation for the client libraries and language support your application needs.
SQLite takes a different integration path: it is a C-language library implementing a SQL database engine. Its documentation includes a C/C++ API specification, a TCL interface specification, and a command-line interface (CLI). It also documents SQL syntax, functions and pragmas. The homepage says SQLite is built into all mobile phones and most computers, and bundled inside countless applications; it does not list third-party integrations. That embedded model means the library is part of the application rather than a separate database server. Choose based on your application's architecture and the language interfaces it can use.
04Open source, self-hosting and lock-in
Both products are self-hostable and avoid requiring a proprietary hosted database service. PostgreSQL is open source under the OSI-approved PostgreSQL License. SQLite’s source code is public domain and free for any purpose; the SQLite License is an optional, one-time purchase for buyers seeking a warranty of title, not a requirement to use the core code.
The architectures create different migration work. PostgreSQL is a database system that teams host and operate; SQLite is a C library embedded in an application. Moving between them means reviewing how the application connects to and uses its database, as well as validating its SQL behavior. The vendor homepages do not describe a data-export procedure. Before choosing either, define an export and restore process for your application and test it with your own data.
Questions people ask
What are the downsides of using SQLite?
SQLite is a library embedded in an application, not a separate database server. That may not fit a system designed around a database service managed independently from application code. Its documentation lists a CLI and C/C++ and TCL interfaces; teams using other languages should check that their required interface is available.
What are the top 3 relational databases?
There is no single ranking that fits every workload. PostgreSQL is an open-source object-relational database system; SQLite is a small, self-contained SQL engine implemented as a C library. The right choice depends on whether your application needs a database server or embedded storage, along with your operational and integration requirements.
Is PostgreSQL end of life?
No: PostgreSQL continues active development, and its homepage announced a PostgreSQL 19 release candidate in October 2026. Version support is separate from the project’s lifecycle. The project says PostgreSQL 14 will stop receiving fixes on November 12, 2026, so teams running that version should plan an upgrade.
Can Postgres handle 1 billion rows?
The PostgreSQL homepage describes reliability and performance but does not publish a one-billion-row capacity guarantee or benchmark. Row count alone does not establish whether a system will meet an application’s needs. Test with representative data and queries, and plan for the hosting and operational work your deployment requires.