CockroachDB vs PlanetScale — Distributed SQL vs Managed Vitess
CockroachDB offers geo-distributed SQL with strong consistency, while PlanetScale provides serverless MySQL via Vitess. Pick depends on scale vs simplicity.
CockroachDB
CockroachDB wins for serious distributed applications needing global consistency and multi-region resilience. Its PostgreSQL compatibility and built-in sharding beat PlanetScale's MySQL-focused, region-limited approach for complex workloads. PlanetScale is simpler but less powerful.
Architecture & Core Technology
CockroachDB is a distributed SQL database built from scratch with a Raft consensus protocol, offering automatic sharding, replication, and strong consistency across regions. It uses a key-value store under the hood with a PostgreSQL wire protocol. PlanetScale is a managed service built on Vitess, a MySQL clustering and sharding layer originally developed at YouTube. It provides horizontal scaling for MySQL but relies on MySQL's underlying architecture, which can limit consistency guarantees in distributed setups. CockroachDB's custom engine gives it an edge in global deployments, while PlanetScale leverages familiar MySQL tooling.
Scalability & Performance
CockroachDB scales horizontally by adding nodes, with automatic rebalancing and no manual sharding required. It handles multi-region deployments with low-latency reads via follower reads and supports up to 99.999% availability. In benchmarks, it achieves thousands of transactions per second per node. PlanetScale scales via Vitess sharding, requiring some schema planning for optimal performance. It offers serverless scaling with autoscaling compute, but performance can be bottlenecked by MySQL's single-threaded replication in highly distributed scenarios. CockroachDB's performance is more predictable at global scale.
Consistency & Transactions
CockroachDB provides serializable isolation by default, ensuring strong consistency even across regions with its consensus-based approach. It supports distributed transactions with ACID guarantees. PlanetScale, using MySQL and Vitess, offers eventual consistency in some configurations, with options for strong consistency but potential latency trade-offs. Vitess adds some transaction management, but it's not as robust as CockroachDB's native distributed transaction layer. For applications needing strict consistency globally, CockroachDB is superior.
Pricing & Cost
CockroachDB offers a free tier (CockroachDB Serverless) with 10GB storage and 250M RU/month, plus paid plans starting at $0.50/GB for storage and $0.30/1M RU for compute. Enterprise plans include advanced features like change data capture. PlanetScale has a free Hobby tier with 10GB storage and 1B row reads/month, with paid plans from $29/month for 10GB storage and additional compute. PlanetScale can be cheaper for small-scale MySQL workloads, but CockroachDB's pricing scales more linearly for large, distributed use cases.
Use Cases & Fit
Use CockroachDB for global applications requiring strong consistency, such as financial systems, e-commerce platforms, or SaaS with multi-region users. It's ideal when you need PostgreSQL compatibility and automatic disaster recovery. PlanetScale suits MySQL-based applications needing simple scaling, like web apps with high read loads or startups wanting serverless databases. It's better for teams already invested in MySQL tooling who don't need advanced distributed features. CockroachDB handles more complex scenarios out-of-the-box.
Ecosystem & Tooling
CockroachDB integrates with PostgreSQL tools like pg_dump, ORMs (e.g., SQLAlchemy), and has built-in observability via DB Console. It supports change data capture for streaming. PlanetScale leverages the MySQL ecosystem, including tools like mysqldump and ORMs (e.g., Prisma), and offers features like branching for schema changes. Both have CLI tools and cloud dashboards. CockroachDB's tooling is more tailored to distributed ops, while PlanetScale focuses on developer experience for MySQL workflows.
Quick Comparison
| Factor | Cockroachdb | Planetscale |
|---|---|---|
| Default Consistency Model | Serializable (strong) | Eventual (configurable to strong) |
| Max Regions Supported | Unlimited (multi-region clusters) | Limited to provider regions (e.g., AWS us-east-1) |
| Free Tier Storage | 10GB | 10GB |
| Base Paid Plan Cost | $0.50/GB storage + $0.30/1M RU compute | $29/month for 10GB storage |
| Native Sharding | Automatic, no manual setup | Manual via Vitess sharding keys |
| SQL Dialect | PostgreSQL-compatible | MySQL-compatible |
| Transaction Throughput (per node) | ~5,000 TPS | ~2,000 TPS (varies with sharding) |
| Schema Change Support | Online schema changes with backfill | Branching for zero-downtime deploys |
The Verdict
Use Cockroachdb if: You need a globally distributed database with strong consistency, PostgreSQL compatibility, and automatic scaling for complex workloads like fintech or global SaaS.
Use Planetscale if: You're building a MySQL-based application that requires simple serverless scaling, familiar tooling, and don't need advanced multi-region features.
Consider: Google Cloud Spanner for even larger scale with similar consistency but higher cost, or Amazon Aurora for managed MySQL/PostgreSQL with regional high availability.
CockroachDB wins for serious distributed applications needing global consistency and multi-region resilience. Its PostgreSQL compatibility and built-in sharding beat PlanetScale's MySQL-focused, region-limited approach for complex workloads. PlanetScale is simpler but less powerful.
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