How to Choose a Database Tool

Key questions to ask

• ? Relational vs document vs vector model — does your data have a clear schema?
• ? Managed service vs self-hosted — who handles backups, failover, and upgrades?
• ? Query patterns — do you need full-text search, time-series, or geospatial?
• ? Pricing at scale — per-row, per-request, or compute-based billing?

Compare 25 database options

Tool	Pricing	Learning Curve	Best For
Amazon Aurora	Pay-as-you-go (AWS pricing)		AWS-native workloads, high-throughput relational data, managed PostgreSQL at scale
Apache Cassandra	Free / Open Source		High-volume time-series data, global write scale, always-on applications
ClickHouse	Free / Open Source (ClickHouse Cloud paid)		Analytics, time-series data, event data warehousing, high-throughput inserts
Cloudflare KV	Freemium — 100k reads/day free, 1k writes/day free		Cloudflare Workers/Pages apps needing edge-distributed key-value storage
CockroachDB	Freemium — free tier, pay-as-you-go		Global apps, multi-region deployments, high availability
Convex	Freemium — generous free tier, paid from $25/mo		Real-time collaborative apps, React and Next.js backends, type-safe reactive data
DynamoDB	Pay-as-you-go (on-demand) or provisioned capacity		High-throughput serverless workloads, AWS-native applications, session and event stores
Firestore	Freemium — generous free tier		Mobile apps, real-time sync, rapid prototyping
MariaDB	Free / Open Source		MySQL-compatible workloads, web apps, drop-in MySQL replacement
Microsoft SQL Server	Freemium — Express free, Standard and Enterprise paid		.NET and Azure-centric workloads, enterprise reporting, Windows-native apps
MongoDB	Freemium - community free, Atlas paid tiers		Content-heavy apps, rapid iteration, event data, AI/vector workloads
MySQL	Free / Open Source		Traditional web apps, OLTP workloads, broad compatibility
Neo4j	Freemium — Community free, Enterprise paid		Knowledge graphs, recommendation engines, fraud detection, relationship-heavy data
Neon	Freemium — free tier, from $19/mo		Serverless Postgres, preview environments with database branches, Next.js and T3 apps
Oracle Database	Paid (Enterprise licensing)		Mission-critical enterprise systems, large-scale OLTP, financial and regulated industries
Pinecone	Freemium — free tier, from $70/mo		AI embeddings, semantic search, recommendation engines
PlanetScale	Paid — pay-as-you-go, from $5/mo (no free tier)		SaaS apps, schema migrations, scalable MySQL or PostgreSQL
PostgreSQL	Free / Open Source		Almost anything, complex queries, ACID compliance
PostgreSQL + pgvector	Free / Open Source		AI apps, semantic search, RAG pipelines
Redis	Free / Open Source (cloud paid)		Caching, sessions, rate limiting, pub-sub, vector similarity search
SQLite	Free / Public Domain		Local development, embedded apps, mobile storage, small-scale deployments
Supabase Postgres	Freemium — free tier, from $25/mo		Real-time apps, MVPs, Postgres with a UI
SurrealDB	Free / Open Source (SurrealDB Cloud paid)		Apps needing flexible data models, real-time queries, graph relationships
Turso	Freemium — generous free tier, from $29/mo		Edge applications, global low-latency reads, per-user database architectures
Upstash	Freemium — 10k commands/day free, pay-per-request		Serverless caching, rate limiting, queue-based workflows, vector search, and durable messaging at the edge