CATEGORY · 68 SERVICES

Databases & caching

Compare included quotas, restrictions and official provider documentation.

Free tier
Free allowance

Free plan: 0.5 GB database storage, 1 GB database I/O/month, 1 million function calls/month, 20 GB-hours action compute/month and 1 GB file storage

Keep in mind

Free limits are measured across the team (not per project); includes 0.5 GB search storage and 3.000 query-GBs/month for search. Exceeding Free caps for a sustained period may cause function calls or mutations to fail; the separate Starter plan can charge usage-based overages. The free allowance is ongoing, not a trial.

Free tier
Free allowance

Free: 500 MB Postgres/project, 2 active projects, 50K monthly active users, 1 GB file storage and 5 GB egress

Keep in mind

Free projects pause after one week of inactivity. The 500 MB database is on shared CPU/500 MB RAM; the 5 GB cached egress is a separate quota. Daily backups and longer log retention require Pro. Paid add-ons/extra compute are not part of the $0 Free plan.

Free tier
Free allowance

Free: 100 databases, 5 GB total storage, 500M rows read and 10M rows written/month, plus 3 GB monthly sync

Keep in mind

Turso's $0 Free plan has no credit card requirement, but reads, writes, storage and embedded sync each have independent limits. Free has 1-day audit log retention; point-in-time restore and deleted database recovery are paid-plan features. Avoid treating 3 GB sync as unlimited network traffic.

Free allowance

MongoDB Atlas M0 Free cluster: 512 MB total storage including indexes; shared RAM/vCPU

Keep in mind

The M0 Free tier is ongoing but constrained to development/learning, with region, throughput and feature limits. A separate no-signup Ephemeral M0 cluster is NOT durable: it pauses after 2 days and is deleted after 7 days unless claimed. Do not confuse ephemeral signup flow with a claimed Free Atlas cluster or a paid Flex cluster.

Free allowance

One Free Upstash Redis database: 256 MB data, 500K commands/month and 10 GB monthly bandwidth

Keep in mind

Instant databases created without signup are deleted after 3 days unless claimed in an account. The claimed Free tier has ongoing monthly quotas; entering a credit card upgrades the database to Pay-as-you-go pricing, whose usage is charged separately.

Free allowance

One Free vector index: 10.000 queries/day and 10.000 updates/day; up to 1 GB vector metadata/data, 1.536 dimensions and 100 namespaces

Keep in mind

The Free index is limited to 200 million vector dimensions, 1 GB total data/metadata and 100 namespaces, with no uptime SLA. Entering a payment card upgrades that index to metered pay-as-you-go; do not confuse ongoing Free quotas with a paid or one-time trial.

Free allowance

Workers Free D1: 5 GB total storage, 10 databases/account, 5M rows read/day and 100K rows written/day

Keep in mind

Daily read/write allowances reset at 00:00 UTC. On Free, exhausted row quotas return query errors and hitting storage cap prevents further writes/schema changes; indexes also count toward stored data and row writes. Workers Paid allows additional billable databases and metered usage. Workers invocation quotas apply separately.

Free allowance

100K database SQL statements/day through Hyperdrive on Workers Free; up to 10 configured databases/account

Keep in mind

Each SELECT, INSERT, UPDATE, DELETE and schema statement counts toward the daily limit (resets 00:00 UTC); over-limit queries fail rather than becoming unlimited. Hyperdrive requires a separately operated PostgreSQL/MySQL origin and a Worker: origin hosting and paid Workers resources are NOT included.

Free allowance

Workers Free includes 30 million queried vector dimensions/month and 5 million stored vector dimensions; up to 100 indexes

Keep in mind

Usage is counted in vector dimensions, not simple query count. Free supports up to 1.536 dimensions/vector, 1.000 namespaces/index and 10 KiB metadata/vector; Workers compute and any external embeddings API have separate quotas or costs.

Free allowance

Firebase Realtime Database on Spark: 1 GB stored, 10 GB downloaded/month and 100 simultaneous connections

Keep in mind

Spark requires no payment method and does not support multiple Realtime Database instances in one project. The 10 GB download quota is monthly (Blaze uses a different daily free allowance); excess Spark usage is restricted rather than silently becoming paid. Firebase Hosting and other products have separate limits.

Free allowance

2 GB storage; 200K database operations/month; up to 50 databases; unlimited database data transfer

Keep in mind

Free is $0 forever without a card and has a fixed $0 spend limit (no automatic overage billing). One query counts as one operation; Free has 10 pooled and 10 direct connections and no automated backups. Paid plans offer larger quotas with spend limits.

Free allowance

Workers Free KV: 1 GB stored, 100K key reads/day and 1K each of key writes, deletes and list requests/day

Keep in mind

Read/write/delete/list limits are separate, reset at 00:00 UTC, and exceeding any quota causes that operation to fail. Dashboard and Wrangler operations count toward limits; missing-key reads also count. No KV egress charge, but Workers requests and CPU quotas are separate.

Free allowance

One ongoing Free Aiven PostgreSQL service per organization: single node, 1 CPU, 1 GB RAM and 1 GB disk; no credit card required

Keep in mind

No VPC, static IP, service integrations, connection pooling, SLA or Aiven support; maximum 20 concurrent database connections. Free services have no fixed expiry but may be powered off after sustained inactivity and can be restarted; upgrading to paid requires a payment method.

Free allowance

One always-free Weaviate Cloud shared cluster/user: 100K objects, 1 GB RAM, 10 GB disk, one collection and up to three tenants

Keep in mind

No card required. Free separately includes 2.000 Weaviate Embeddings requests/day and 1.000 Query Agent requests/month; backups, HA/replication and production SLA are not included. Paid Flex and other AI-service overages are separate; do not assume all query/embedding usage is unlimited.

Free allowance

One ongoing Free single-node Qdrant Cloud cluster with 0.5 vCPU, 1 GB RAM and 4 GB disk; no credit card required

Keep in mind

Free is for prototyping, not production: limited cloud/region choice and no high availability or production SLA. Cluster suspends after one week of inactivity and is DELETED after four weeks unless reactivated; snapshots must be managed manually. Free hosted Qdrant is separate from self-hosted OSS and paid inference.

Free allowance

Pinecone Starter: up to 2 GB vector storage, 2 million write units and 1 million read units/month, 1 GB egress/month and 5 indexes

Keep in mind

Starter is a recurring Free managed database allowance, limited to AWS us-east-1, one project and small teams, without an uptime SLA. Dedicated read nodes, backups and cross-region restore are unavailable; Builder ($20/month) and higher usage-based plans are distinct. Inference or Assistant resources can have separate limits.

Free allowance

10 GB storage and 10 Pulse compute CU-hours/month; up to 3 internal active users and 2 service accounts

Keep in mind

Lite is an ongoing $0 tier with 10 GB storage and 10 hours of Pulse compute/month; a card is not needed. An optional 7-day Business trial is separate and does not terminate the free Lite plan. Customer-facing embedding/redistribution is restricted on Lite; usage beyond Lite included quotas needs a paid plan.

Free allowance

1 single-host cluster; 50 Gorilla Credits/month; 7-day retention

Keep in mind

The initial 30-day Pro trial automatically reverts to ongoing Free (1 single-host cluster, 50 monthly Gorilla Credits) unless upgraded. Free monthly credits reset and do not roll over. Credit-pack auto-reload is ON by default in provider pricing documentation; disable auto-reload explicitly to pause credit-consuming actions at zero balance and avoid unexpected purchased credits. A local read-only collector sends telemetry to the managed cloud; fully on-prem deployment is Enterprise, not Free.

Free allowance

25 MB fully managed Memcached cache; 1 proxy server; 10 connections; basic analytics and 24/7 monitoring

Keep in mind

Developer tier is aimed at development; high availability, alerting and unlimited connections require paid plans. Free-signup card requirement and commercial production rights are unconfirmed; unauthorized resale is prohibited.

Free allowance

One free Redis Cloud database per account; 30 MB memory; 30 concurrent connections; 5 GB monthly network bandwidth; up to 100 operations/second (1 KiB requests)

Keep in mind

Free Essentials is intended for learning and prototypes; shared deployment, best-effort SLA and community support. Network and throughput quotas apply; commercial production rights are not explicitly confirmed.

Free self-hosted software
Free allowance

Self-hosted PocketBase backend with an embedded database, authentication, file storage, and real-time subscriptions.

Keep in mind

Runs on your infrastructure rather than a hosted free quota. Plan for persistent disk, backups, security updates, and deployment/scale constraints.

Free self-hosted software
Free allowance

Self-managed SurrealDB database software supporting structured records, queries, and application data APIs.

Keep in mind

Free community deployment does not include hosted compute, storage, backups, or an SLA. Review edition features and licensing for your use case.

Free self-hosted software
Free allowance

Self-hosted NocoDB spreadsheet-style database interface and collaboration tools over supported data sources.

Keep in mind

Hosting, underlying database, storage, and operations are your responsibility. Check which collaboration and governance features require paid tiers.

Free self-hosted software
Free allowance

Self-hosted Directus data platform and API layer for SQL databases, content management, and admin interfaces.

Keep in mind

Your database and server costs are separate. Check Directus's current self-hosted licensing eligibility and enterprise feature restrictions before commercial deployment.

Free allowance

Up to 5 free MySQL-compatible instances per organization; each includes 5 GiB row storage, 5 GiB columnar storage and 50 million Request Units per month.

Keep in mind

Free allowance applies separately to each of the first five eligible instances; at quota, new connections are blocked and existing sessions throttled until reset. Enabling paid overages or adding instances requires a credit card and spending limit. PostgreSQL-compatible public-preview quota is separate and not included. Commercial-use terms not independently confirmed.

Free self-hosted software
Free allowance

Free MIT-licensed self-hosted distributed relational database built on SQLite, with HTTP/JSON API, Raft replication and high availability; no vendor-enforced database, query or monthly usage quota.

Keep in mind

Self-hosted software, not a managed free database: compute, disk, network, backups and operations are your responsibility. Multi-node high availability needs quorum; no hosted SLA. Preserve MIT copyright and license notices.

Free self-hosted software
Free allowance

BSD-3-Clause open-source in-memory key/value datastore for standalone or clustered self-hosting; no vendor-imposed instance, request, or storage quota.

Keep in mind

You must provision and secure your own servers, memory, storage, backups and operations; no hosted free instance or managed SLA is included.

Free self-hosted software
Free allowance

Free Apache-2.0 open-source time-series SQL database with high-throughput ingestion, Parquet support and a built-in web console; no vendor-imposed software quotas or license fee.

Keep in mind

You supply compute, storage, backups and operational security. High availability/replication, role-based access control, TLS, audit logs and automated tiering are Enterprise features; the Enterprise trial is not an ongoing free tier.

Free self-hosted software
Free allowance

Apache-2.0 self-hosted SQL database compatible with MySQL clients, supporting Git-style branching, commits, diffs and merges of versioned tables; no vendor-enforced database size, query or seat quotas in the open-source server.

Keep in mind

Requires your own CPU, RAM, disk, backups and database operations. DoltHub sharing, Hosted Dolt and managed support are separate offerings; Git-style version control changes performance and storage considerations versus conventional MySQL.

Free allowance

Up to 25 users, unlimited bases/tables, 10.000 total rows, 2 GB file storage, 3.000 API calls/month and one month of snapshots.

Keep in mind

Limits are shared per team; paid Plus/Enterprise needed for higher row/storage/API allowances and advanced features. Separate self-hosted server plans have different user limits.

Free self-hosted software
Free allowance

Free Apache-2.0 open-source vector database for embeddings and similarity search, available as an embedded local store or self-hosted client/server; no vendor-imposed software vector or query quota.

Keep in mind

Self-hosted Chroma is distinct from metered Chroma Cloud with introductory $5 credits. You provide storage, backups, access controls, hosting and any external embedding-model/API costs; production scaling and security are your responsibility.

Free self-hosted software
Free allowance

Free Apache-2.0 open-source vector database for semantic, hybrid and full-text search, with standalone Docker and distributed Kubernetes deployment; no vendor-imposed software vector or query quota.

Keep in mind

Self-hosted edition only; compute, RAM, storage, networking, backups and operations are your responsibility. Zilliz managed cloud is a separate paid/limited service; infrastructure and optional model/embedding API usage may cost money.

Free self-hosted software
Free allowance

Apache-2.0 open-source embedded vector and multimodal database for Python, JavaScript and Rust; local/self-managed storage, vector/full-text search and metadata filtering with no vendor-imposed software query or document quota.

Keep in mind

This is the self-managed open-source library, not managed LanceDB Cloud. You provide storage, indexing, compute, backups and operations; cloud object storage, embeddings and AI services may cost money. Observe Apache-2.0 notices.

Free self-hosted software
Free allowance

Apache-2.0 document database with HTTP/JSON API, replication and offline synchronization; free self-managed software with no license-based record quota.

Keep in mind

Database replication and storage use your own servers, disk and bandwidth; hosted CouchDB services are billed separately.

Free allowance

MIT-licensed in-process analytical SQL database with local CSV, JSON and Parquet querying; all open-source engine features available without a subscription or query quota.

Keep in mind

Embedded analytics engine, not a managed multi-user database service; users provide their own compute, storage and any external object-storage credentials.

Free self-hosted software
Free allowance

Apache-2.0 distributed wide-column database with replication, CQL and multi-node scaling; unrestricted open-source software use on self-managed servers.

Keep in mind

Clusters require ongoing capacity planning, backups and operations; CPU, storage and network costs are not included and managed Cassandra offerings have separate pricing.

Free allowance

Apache-2.0 open-source distributed real-time analytical database with SQL queries and batch/stream ingestion, deployable on your own infrastructure without a vendor-imposed storage or query quota in the software.

Keep in mind

Self-hosted cluster compute, storage, networking, operations and streaming sources are not included. Managed Apache Pinot services are separate paid products; running a production cluster can require significant resources.

Free self-hosted software
Free allowance

Open-source relational SQL database with ACID transactions, indexes, JSON and replication; PostgreSQL License imposes no software seat, row or query allowance.

Keep in mind

Self-managed compute, storage, backups, high availability and support are not included; third-party managed PostgreSQL offerings charge separately.

Free allowance

Apache-2.0 open-source columnar SQL analytics database with real-time analytical queries and distributed processing; no software query or row cap.

Keep in mind

Own infrastructure, storage, operations and cluster management are required; ClickHouse Cloud is a separately billed managed service.

Free allowance

GPLv2 open-source relational SQL database server with transactions, replication and community storage engines; no per-user or database license cap.

Keep in mind

Hosting, maintenance and backup costs are yours; GPLv2 distribution obligations apply. MariaDB Enterprise Platform and paid support are separate.

Free self-hosted software
Free allowance

Free MIT/Apache-2.0 open-source single-node time-series database software with no license fees, usage fees, or telemetry requirement; self-hosted storage and compute are user-provided.

Keep in mind

Core queries approximately 72 hours of data by default due to Parquet query-file limits; high availability, multi-node and enterprise features require paid products. Own server, storage and object-storage costs apply; not a free managed cloud tier.

Free allowance

One free-forever single-node YugabyteDB Aeon Sandbox cluster per account, up to 2 vCPU, 4 GB RAM and 10 GB storage depending on provider; no credit card required.

Keep in mind

Development and tutorials only, not production or performance testing; up to 15 connections, no backups, no scaling or VPC networking. Inactive clusters may be paused after 10 days and deleted after 15 days; commercial production suitability requires provider confirmation.

Free allowance

Apache-2.0 MongoDB-compatible document database proxy backed by PostgreSQL with DocumentDB extension; no software license fee or per-database quota when self-hosted.

Keep in mind

Requires independently hosted PostgreSQL and DocumentDB extension; MongoDB compatibility is incomplete and infrastructure, storage, backups and operations cost extra. Evaluation Docker image is not production-persistent.

Free self-hosted software
Free allowance

Apache-2.0 open-source vector database with vector similarity, hybrid search, payload filtering and a self-managed Docker deployment; no vendor-imposed software vector or query quota.

Keep in mind

Self-hosted Qdrant only, distinct from Qdrant Cloud. You provide compute, persistent storage, security, backups and operations; embedding/model APIs and infrastructure may cost money.

Free allowance

Free PostgreSQL-licensed extension for exact and approximate vector similarity search inside PostgreSQL 13+; supports HNSW and IVFFlat indexes, multiple vector types and distance metrics without a vendor-imposed software quota.

Keep in mind

Requires a PostgreSQL installation with extension support; some managed Postgres providers may not enable it or may charge for database compute and storage. Embedding generation and operations are separate.

Free allowance

Self-hosted Weaviate core vector database supports vector and keyword/hybrid search, metadata filtering and collections without a vendor-imposed core software query quota; BSD-3-Clause code is free to run.

Keep in mind

The repository has mixed licensing: code outside the wl directory is BSD-3-Clause; separately licensed enterprise features need a valid license key. Self-hosting, storage, backups, security and model APIs are not included; managed Weaviate Cloud is a separate plan.

Free allowance

One Free Render Key Value (Redis-compatible) instance per workspace, in-memory data store with no monthly software subscription charge.

Keep in mind

Free instance has no disk persistence: all data is lost on restarts, upgrades and some maintenance. Not recommended for production; free instance may restart without notice. Card and commercial terms not independently confirmed.

Free allowance

Public-domain, in-process SQL database engine for local applications with no vendor subscription, seat limit, database-size quota imposed by a hosted plan, or per-query charge for the core library.

Keep in mind

Runs embedded in the application rather than as a managed multi-user database server. Local disk, memory, backup, concurrency and hosting limits still apply; optional commercial SQLite extensions, support and warranty-of-title are separately priced.

Free allowance

Open-source Apache-2.0/PostgreSQL-licensed PostgreSQL-compatible WebAssembly database for browser, Node.js, Bun and Deno; in-memory or local filesystem/IndexedDB persistence with no vendor-enforced local query quota.

Keep in mind

Embedded single-user/local database, not a managed cloud PostgreSQL service or drop-in multi-client server. Storage, browser resource limits, sync services, and remote hosting are separate; some integrations may have their own costs.

Free allowance

Free Java SQL database engine (MPL 2.0 or EPL 1.0) with embedded, in-memory and TCP server modes; no software-enforced storage or query quota.

Keep in mind

Runs inside your JVM or on infrastructure you operate; hosting, storage and operations are not included. Modified H2 source must meet license publication obligations; distributed binaries need license and disclaimer notices.

Free allowance

MIT-licensed geospatial in-memory database server with real-time geofencing, spatial indexes, Redis RESP/HTTP interfaces and persistence; no vendor software quota or seat fee.

Keep in mind

Operate and secure your own Tile38 server, memory, storage and backups; infrastructure and networking costs are not included. Geofencing webhook destinations and external services may charge separately.

Free allowance

Apache-2.0 open-source transactional distributed ordered key-value database with ACID transactions, multi-node deployment and no vendor-enforced query, user or storage quota for self-hosting.

Keep in mind

You must operate servers, disks, cluster coordination, backups, security and monitoring; infrastructure and optional commercial support are not included. Follow Apache-2.0 license notice requirements; this is not a free managed FoundationDB cloud instance.

Free self-hosted software
Free allowance

Apache-2.0 open-source distributed column-family database; no software license fee or vendor-enforced storage/query quota for self-operated deployments.

Keep in mind

Requires self-managed infrastructure and operational expertise, typically Hadoop/HDFS or compatible storage; compute, disks, networking, backups and support are not free.

Free self-hosted software
Free allowance

MIT-licensed Redis-protocol-compatible cache-store with persistence, replication and sharding; self-hosted software has no vendor-enforced request, seat or instance quota.

Keep in mind

Operate your own server/container, RAM, disks, networking, TLS and backups. Azure Cosmos DB Garnet Cache is a separate managed paid product, not a free hosted service or included infrastructure.

Free self-hosted software
Free allowance

Apache-2.0 distributed double-entry financial transactions database; free self-hosted binaries/source with no vendor-imposed transaction, seat or instance quotas.

Keep in mind

Requires your own compatible Linux machines, durable disks, networking, replication, backups and operations. Managed hosting, storage, hardware and production support are not included.

Free allowance

Apache-2.0 embedded Rust LSM key-value database with language bindings; free library without vendor-imposed software request, seat or instance quotas.

Keep in mind

Not a free hosted database. You must supply S3, R2, GCS or compatible object storage and pay any storage, API request, egress and compute charges. API compatibility may change between versions; production operations are your responsibility.

Free allowance

Apache-2.0 self-managed streaming SQL database with materialized views and connectors; no software license fees, feature gates, or usage limits.

Keep in mind

Requires your own compute, storage, networking, and operations; object storage, Kubernetes, and external connector/provider charges are separate. Enterprise support and managed RisingWave Cloud are not included.

Free self-hosted software
Free allowance

Apache-2.0 self-hosted SQL analytics and hybrid-search database with streaming ingestion, materialized views and lakehouse queries; no vendor software query quota.

Keep in mind

You supply compute, disks, networking, object storage, ingestion services and backups. Some third-party dependencies have incompatible licenses and features may need disabling for Apache-2.0 compliance; managed hosting is not included.

Free allowance

Apache-2.0 open-source distributed transactional key-value database with RawKV and ACID transactional APIs; no software license fee or per-node free-edition quota.

Keep in mind

Self-managed TiKV requires your own servers, disks, network, backups, operations and often PD cluster components; infrastructure and any separately purchased managed TiDB/TiKV services cost extra. Use supported releases rather than assuming the development branch is production-ready.

Free allowance

Apache-2.0 self-managed distributed key-value store; no software license fee or vendor-imposed operation quota.

Keep in mind

Requires user-operated nodes, storage, backup, networking and cluster maintenance; hosting and cloud resources are not free. This is not a managed etcd cloud allowance.

Free self-hosted software
Free allowance

Apache-2.0 Redis-protocol-compatible, RocksDB-backed distributed key-value database with replication, namespaces and cluster support; self-hosted software has no license fee or vendor usage quota.

Keep in mind

Self-hosted Apache-2.0 Redis-protocol-compatible database, not a vendor-hosted Redis free plan. Operators provide servers, persistent storage, backups, replication/failover configuration, security and monitoring; cloud compute, disks and network can incur charges. Redis clients and other third-party components have separate licensing/usage terms.

Free allowance

Apache-2.0 licensed self-hosted graph database with Gremlin and Cypher querying, REST API and graph processing tools; no license fee or vendor-hosted free resource quota.

Keep in mind

Compute, backend storage, network, security, backups, operations and optional external Spark/Flink/LLM services are paid or user-operated separately. This is not a free managed graph-database plan.

Free allowance

Apache-2.0 licensed open-source core for self-hosted metrics, logs and traces storage and SQL/PromQL querying; standalone or distributed deployment without software license fees.

Keep in mind

You operate and pay for compute, object storage, networking, backups and any external observability ingestion infrastructure. GreptimeDB Enterprise features (including automated repartitioning, read replicas and enterprise governance) are separately licensed; Greptime Cloud pricing is separate.

Free allowance

Apache-2.0 licensed self-managed transactional graph database with Apache TinkerPop/Gremlin support; no vendor license fee or software usage quota.

Keep in mind

Requires user-operated compute, graph storage backend (for example Cassandra/HBase/Bigtable), optional search indexing (Elasticsearch/Solr/Lucene), security, backup and maintenance. Cloud backends and managed hosting can charge separately.

Free allowance

MPL-2.0 licensed, free-to-use SQL database with immutable history and bitemporal queries; run a self-managed Docker deployment without a vendor software subscription.

Keep in mind

Bring your own CPU, memory, persistent storage or S3-compatible object storage, networking and operations. Managed infrastructure and optional commercial support or consulting are not included; MPL-2.0 distribution obligations apply.

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