Free
Free
LMDB open-source software is available from the OpenLDAP project with public documentation on symas.com.
- Access
- LMDB open-source software is available from the OpenLDAP project with public documentation on symas.com.
LMDB
● Identity checkedDatabase · Vendor site 2026-10-04
LMDB (Lightning Memory-Mapped Database) is an embedded key-value store developed by Symas for the OpenLDAP Project. It combines memory-mapped performance with ACID transactions, MVCC readers, and compact on-disk representation for embedded workloads.
- Category
- Database
- Free access
- LMDB open-source software is available from the OpenLDAP project with public documentation on symas.com.
- API access
- Symas publishes C API documentation and man pages for embedding LMDB in applications.
Is LMDB right for you?
A good fit for
Systems developers needing an embedded, high-performance transactional key-value engine.
Before you choose
Commercial support and porting services are sold separately; LMDB itself is an embeddable library rather than a hosted database service.
Memory-mapped embedded database
LMDB targets applications that need in-memory read speeds with persistent storage and minimal operational overhead.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Embedded design | Page describes LMDB as an ultra-fast, compact, crash-proof key-value embedded data store. | Facts sourced | 2026-10-04 |
| ACID semantics | Marketing notes full ACID with MVCC, reader/writer transactions, and serialized writes. | Facts sourced | 2026-10-04 |
| OpenLDAP heritage | Symas page states LMDB was developed for the OpenLDAP Project. | Facts sourced | 2026-10-04 |
Understand the total cost
LMDB pricing & plans
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Frequently asked questions
What is LMDB used for?
LMDB (Lightning Memory-Mapped Database) is an embedded key-value store developed by Symas for the OpenLDAP Project. It combines memory-mapped performance with ACID transactions, MVCC readers, and compact on-disk representation for embedded workloads.
Does LMDB have a free plan?
LMDB open-source software is available from the OpenLDAP project with public documentation on symas.com.. This record lists ongoing free access; check the plan limits before starting.
How much does LMDB cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use LMDB through an API?
Symas publishes C API documentation and man pages for embedding LMDB in applications.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Commercial support and porting services are sold separately; LMDB itself is an embeddable library rather than a hosted database service.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.