Data Mining
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Free tier: Single user, single database connection
Pros: Connects to your database (BigQuery, PostgreSQL, others coming soon). Analysis is performed in a notebook interface, either by writing SQL or using drag-and-drop. Notebooks are rich documents containing analysis, media, and interactive elements.
Limitations: Cannot share notebooks publically in free tier, and can only connect to one database.
Free tier: Completely free to use (on premises)
Pros: Allows you to run queries without knowing SQL, build dashboards, set up nightly email reports and ask questions from Slack. Works with your application database or a dedicated data warehouse, and supports MySQL, PostgreSQL, AWS Redshift, Google BigQuery and many others.
Limitations: Require external hosting but may fit in AWS free tier.
Free tier: 25 GB of Storage, 25 Units of Write Capacity, 25 Units of Read Capacity
Pros: A NoSQL database with both document and key-value store models, replicated with high availability. The free tier is enough to handle up to 200M requests per month.
Limitations: One unit of read/write capacity handles one request per second (or two requests per second in the case of eventually consistent reads). Has both strongly consistent and eventually consistent reads.
Free tier: 1$/GB per month, $0.015$/100 "heavy" requests, $0.015/500 "light" requests, first $50 per month free
Pros: Full CouchDB hosting. Can host also static sites and javascript applications
Limitations: Account on shared multitenant instance
Exceeding the free tier: Credit card needed after first 30 days to charge exceeding usage
Free tier: 25$ per month for free, serverless databases. Up to 30 million reads, 4.5 million writes, 40GB in total.
Pros: Unlimited number of databases, Grafana-based health monitor, multiple providers (GCP, Azure, AWS)
Limitations: Does not support VPC peering, multi-region databases, materialized views, or logged batches
Free tier: Simple graph storage with unlimited repositories (public and private)
Limitations: Invite Only.
Free tier: 20MB storage, 5 simultaneous connections
Pros: SQL web browser for simple database inspection, secure connection over SSL, full automatic backups
Limitations: No SLA no in-memory cache, shared server
Free tier: 100k read ops, 100k write ops, 500k compute ops, 100MB storage
Pros: Serverless with global replication and ACID transactions. Native GraphQL support, ABAC security model and support for relational, document, graph, and time-series patterns.
Limitations: No team management or preview sandbox on free tier.
Exceeding the free tier: Hard limits enforced on free tier. Subscription plans offer metered overages.
Free tier: 1GB storage, 10GB/month transfer, 100 simultaneous connections
Pros: really fast can be used for real time pub/sub, libraries for multiple platforms, designed to be used directly from frontend (with security rules), integrates with Firebase Authentication
Limitations: no backups, limited queries, complicated security rules (read the manual!)
Free tier: 1GB storage/day, 50K reads/day, 20K writes/day, 20K deletes/day
Pros: dashboard, clients available in multiple languages, fully managed (sharding and replication), ACID transactions
Limitations: complex requests needs specific indexes (read the manual)
Free tier: Writes: 5MB every 5 minutes, Tasks & Queries: 300MB every 5 minutes, Storage: 30 days of retention, Cardinality: Up to 10,000 series, Alerting: 2 alert checks and 2 notification rules, You can create up to: 5 dashboards, 5 tasks, 2 databases to store your time series data
Pros: purpose-built time series database, pre-built UI and dashboarding tools, background processing and monitoring agent
Free tier: Start with a free 3-node replica set and 512 MB of storage / Shared RAM.
Pros: Fast, secure, and highly available MongoDB service for any scale.
Free tier: 1Gb storage
Pros: Easy to deploy
Limitations: Only support mongodb 2.4
Free tier: 2 Autonomous Database instances with 1 OCPU and 20GB storage each
Pros: Flexible workload tuning
Limitations: Maximum of 20 simultaneous database sessions
Limitations: 3 projects, 2 plugins per project, 2 environments per project, 3 live deploys per environment.
Free tier: 30MB, 30 connections
Pros: managed, possibility to choose cloud provider (AWS, Azure, GCE, IBM Softlayer) and availability zones
Free tier: 500Mb storage, 100 simultaneous connections
Pros: Open source, built in realtime capabilities and auth, 40+ extensions and pgbouncer preinstalled
Limitations: Paused after 1 week of inactivity
Exceeding the free tier: There are no overage charges. Team will reach out asking user to upgrade to a higher plan if limits are exceeded.
Pros: Repositories support , and and . There is also a simple Web interface for querying datasets, a Web API and a Command-line interface
Free tier: 1GB memory per container, shared CPU, 1GB disk usage (10GB hard limit), 100GB outbound traffic (unlimited inbound).
Pros: Allows hosting multiple databases (PostgreSQL, MySQL, Redis, MongoDB) and you can have your app and database on the same platform and run both of them for free. for app hosting.