--- title: "kronotop vs lantern" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/kronotop-kronotop-vs-lanterndata-lantern" tools: ["kronotop-kronotop", "lanterndata-lantern"] --- # kronotop vs lantern *GraphCanon updated Aug 23, 2026* ## Verdict Pick kronotop if kronotop is a distributed transactional document database that utilizes FoundationDB for ACID transactions and provides vector search; pick lantern if lantern is an extension for PostgreSQL written in Rust, providing capabilities for approximate nearest neighbor search tailored for AI applications. [kronotop](https://kronotop.com) reports 305 GitHub stars, 11 forks, and 3 open issues, last pushed Aug 21, 2026. [lantern](https://lantern.dev) has 889 stars, 67 forks, and 42 open issues, last pushed Dec 12, 2024. Figures are from public GitHub metadata via [kronotop's repository](https://github.com/kronotop/kronotop) and [lantern's repository](https://github.com/lanterndata/lantern). | | [kronotop](/tools/kronotop-kronotop.md) | [lantern](/tools/lanterndata-lantern.md) | | --- | --- | --- | | Tagline | Distributed transactional document database backed by FoundationDB | PostgreSQL vector database extension for building AI applications | | Stars | 305 | 889 | | Forks | 11 | 67 | | Open issues | 3 | 42 | | Language | Java | Rust | | Adopt for | Kronotop is a distributed transactional document database that utilizes FoundationDB for ACID transactions and provides vector search. | Lantern is an extension for PostgreSQL written in Rust, providing capabilities for approximate nearest neighbor search tailored for AI applications. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | AGPL-3.0, allowing free use and modification but requiring derivative works to be open-sourced as well. | | Categories | Vector Databases | Vector Databases | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [kronotop](/tools/kronotop-kronotop.md) | [lantern](/tools/lanterndata-lantern.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Dormant (18%) | | Days since push | 1d | 618d | | Open issues (now) | 3 | 42 | | Stars delta | +3 (30d) | 0 (30d) | | Open issues delta | +1 (30d) | 0 (30d) | | Full report | [trust report](/tools/kronotop-kronotop/trust.md) | [trust report](/tools/lanterndata-lantern/trust.md) | ## Decision facts: kronotop - **Adopt for:** Kronotop is a distributed transactional document database that utilizes FoundationDB for ACID transactions and provides vector search. ## Decision facts: lantern - **Adopt for:** Lantern is an extension for PostgreSQL written in Rust, providing capabilities for approximate nearest neighbor search tailored for AI applications. - **License detail:** AGPL-3.0, allowing free use and modification but requiring derivative works to be open-sourced as well. ## Choose when ### Choose kronotop if… - kronotop is primarily Java; lantern is Rust. - License: kronotop is Apache-2.0, lantern is AGPL-3.0. - Tags unique to kronotop: acid, ai-agents, ai-memory, database. - When needing a multi-model database with support for JSON documents and key-value storage alongside transactional capabilities. ### Choose lantern if… - lantern is primarily Rust; kronotop is Java. - License: lantern is AGPL-3.0, kronotop is Apache-2.0. - Tags unique to lantern: ai, ann, approximate-nearest-neighbor-search, data-science. - When you need to perform vector database operations integrated with a PostgreSQL environment ## When NOT to use kronotop - If the project does not require vector search capabilities or ACID transactions, as these features may introduce unnecessary overhead. - When a simpler database model without the complexity of setting up and operating on top of FoundationDB would suffice for the application needs. ## When NOT to use lantern - Avoid when an open-source license like AGPL-3.0 might interfere with proprietary or closed-source projects - Not suitable if you require direct support for non-vector indexing operations outside ANN capabilities ## Common questions ### What is the difference between kronotop and lantern? kronotop: Distributed transactional document database backed by FoundationDB. lantern: PostgreSQL vector database extension for building AI applications. See the comparison table for live GitHub stats and shared categories. ### When should I choose kronotop over lantern? Choose kronotop over lantern when kronotop is primarily Java; lantern is Rust; License: kronotop is Apache-2.0, lantern is AGPL-3.0; Tags unique to kronotop: acid, ai-agents, ai-memory, database; When needing a multi-model database with support for JSON documents and key-value storage alongside transactional capabilities. ### When should I choose lantern over kronotop? Choose lantern over kronotop when lantern is primarily Rust; kronotop is Java; License: lantern is AGPL-3.0, kronotop is Apache-2.0; Tags unique to lantern: ai, ann, approximate-nearest-neighbor-search, data-science; When you need to perform vector database operations integrated with a PostgreSQL environment. ### When should I avoid kronotop? If the project does not require vector search capabilities or ACID transactions, as these features may introduce unnecessary overhead. When a simpler database model without the complexity of setting up and operating on top of FoundationDB would suffice for the application needs. ### When should I avoid lantern? Avoid when an open-source license like AGPL-3.0 might interfere with proprietary or closed-source projects Not suitable if you require direct support for non-vector indexing operations outside ANN capabilities ### Is kronotop or lantern more popular on GitHub? lantern has more GitHub stars (889 vs 305). Stars measure visibility, not whether either tool fits your constraints. ### Are kronotop and lantern open source? Yes - both are open-source projects on GitHub (kronotop: Apache-2.0, lantern: AGPL-3.0). ### Where can I find alternatives to kronotop or lantern? GraphCanon lists graph-backed alternatives at [kronotop alternatives](/tools/kronotop-kronotop/alternatives) and [lantern alternatives](/tools/lanterndata-lantern/alternatives) ([kronotop markdown twin](/tools/kronotop-kronotop/alternatives.md), [lantern markdown twin](/tools/lanterndata-lantern/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/kronotop-kronotop-vs-lanterndata-lantern.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, kronotop or lantern? kronotop: Very active. lantern: Dormant. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for kronotop and lantern? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [kronotop trust report](/tools/kronotop-kronotop/trust); [lantern trust report](/tools/lanterndata-lantern/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=kronotop-kronotop`](/api/graphcanon/graph?tool=kronotop-kronotop) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_