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Free Amazon Neptune alternatives: 3 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rank

3 of the 3 Amazon Neptune alternatives we track can be used for free (free, open source, or with a free plan). Neo4j, SurrealDB and Azure Cosmos DB rank highest, with facts last verified Nov 8, 2026.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1Neo4j logoNeo4jOpen source—YesWindows, macOS, Linux +25 of 568.8
2SurrealDB logoSurrealDBFree plan + paidFrom $0.021 per hour per extra instanceNoWeb, Self-hosted, Linux +26 of 666.2
3Azure Cosmos DB logoAzure Cosmos DBFree plan + paid—NoWeb8 of 852.6
  1. Neo4j logo

    1. Neo4jTop pick

    Best for: Developers modelling highly connected data such as fraud, recommendations or knowledge graphs

    Open sourceSelf-hostableWindows, macOS, Linux, Web, Self-hosted

    68.8

    score / 100

    Why switch from Amazon Neptune

    The best-known graph database, with a self-hosted community edition, rich tooling and a managed cloud on several providers.

    Pros

    • Cypher makes graph queries short and readable
    • Free Desktop app with import, query and visual tools
    • Managed AuraDB cloud with a free tier
    • Large community, courses and integrations

    Cons

    • Clustering and advanced security need the paid Enterprise Edition
    • Desktop's bundled Enterprise licence is for local single-user use only
    • Memory-hungry on large graphs
    Visit Neo4j Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Neo4j a good Amazon Neptune alternative?

    Verified facts

    5 of 5 verified
    Neo4j Desktop price
    Free
    Checked Nov 8, 2026neo4j.com(opens source in a new tab)
    Desktop platforms
    Linux, macOS, Windows
    Checked Nov 8, 2026neo4j.com(opens source in a new tab)
    Desktop licence
    Includes Developer edition of Enterprise
    Checked Nov 8, 2026neo4j.com(opens source in a new tab)
    License
    GPL-3.0 (Community Edition)
    Checked Nov 1, 2026github.com(opens source in a new tab)
    Cloud free tier
    AuraDB Free, $0
    Checked Nov 8, 2026neo4j.com(opens source in a new tab)
  2. SurrealDB logo

    2. SurrealDB

    Best for: Developers who want documents, graph relations and vectors in a single database

    Free plan + paidSelf-hostableWeb, Self-hosted, Linux, macOS, Windows

    66.2

    score / 100

    Why switch from Amazon Neptune

    Open-source multi-model database with graph relations, runnable on your own servers or any cloud.

    Pros

    • Documents, graphs and vectors in one query language
    • Built-in permissions and live queries
    • Free first cloud instance

    Cons

    • Younger ecosystem with fewer ORMs and tools
    • SurrealQL is another language to learn
    • Business Source Licence rather than a standard open-source licence
    Visit SurrealDB Details and reviews
    How this score is calculated
    Editorial fit ×0.341
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is SurrealDB a good Amazon Neptune alternative?

    Verified facts

    6 of 6 verified
    Free instance
    First instance $0/hour, 1GB storage
    Checked Oct 29, 2026surrealdb.com(opens source in a new tab)
    Paid instances
    From $0.021/hour
    Checked Oct 29, 2026surrealdb.com(opens source in a new tab)
    Capabilities
    Graph and vector
    Checked Nov 8, 2026surrealdb.com(opens source in a new tab)
    Starting price
    From $0.021 per hour per extra instance
    Checked Nov 1, 2026surrealdb.com(opens source in a new tab)
    Free plan
    Yes, first instance with 1 GB storage
    Checked Nov 1, 2026surrealdb.com(opens source in a new tab)
    Scale plan
    $0.192 per node/hour, 3 nodes minimum
    Checked Nov 1, 2026surrealdb.com(opens source in a new tab)
  3. Azure Cosmos DB logo

    3. Azure Cosmos DB

    Best for: Azure-based teams that need a globally replicated NoSQL or vector database

    Free plan + paidWeb

    52.6

    score / 100

    Why switch from Amazon Neptune

    Microsoft's managed multi-model database with a Gremlin API, the natural pick for teams on Azure.

    Pros

    • Global replication with tunable consistency
    • MongoDB and Cassandra-compatible APIs ease migrations
    • Serverless mode for spiky workloads

    Cons

    • Request-unit pricing is hard to predict
    • Costs grow quickly with multi-region writes
    • Only available on Azure
    Visit Azure Cosmos DB Details and reviews
    How this score is calculated
    Editorial fit ×0.346
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Azure Cosmos DB a good Amazon Neptune alternative?

    Verified facts

    8 of 8 verified
    Database type
    Serverless NoSQL and vector database
    Checked Nov 8, 2026azure.microsoft.com(opens source in a new tab)
    Vector search
    Built in
    Checked Nov 8, 2026azure.microsoft.com(opens source in a new tab)
    Free tier
    First 1000 RU/s and 25 GB
    Checked Nov 8, 2026learn.microsoft.com(opens source in a new tab)
    APIs
    NoSQL, MongoDB, Cassandra, Gremlin, Table
    Checked Nov 8, 2026learn.microsoft.com(opens source in a new tab)
    Free plan
    Yes, 1,000 RU/s and 25 GB storage a month
    Checked Nov 8, 2026azure.microsoft.com(opens source in a new tab)
    Free trial
    30 days, no Azure subscription needed
    Checked Nov 8, 2026azure.microsoft.com(opens source in a new tab)
    New Azure account credit
    $200 credit for 30 days
    Checked Nov 8, 2026azure.microsoft.com(opens source in a new tab)
    Data transfer out
    $0.05 per GB from Europe or North America
    Checked Nov 8, 2026azure.microsoft.com(opens source in a new tab)